'use client';

import { useState, useEffect, useMemo, useRef, type ReactNode } from 'react';
import {
  Sliders,
  Plus,
  Search,
  RefreshCw,
  ChevronDown,
  ChevronRight,
  Trash2,
  Filter,
  X,
  Box,
  FileSpreadsheet,
  FileText,
  Columns3,
  GripVertical,
  ArrowUpDown,
  Calendar,
  AlertTriangle,
} from 'lucide-react';
import { toast } from 'sonner';
import { format, subDays } from 'date-fns';
import { AnimatePresence, motion } from '@/lib/motion';
import { catalogService, AttributeTypeResponse } from '@/services/api/catalogService';
import { SlideOver } from '@/components/ui/SlideOver';
import { RowActionsMenu } from '@/components/ui/RowActionsMenu';
import { ViewModeToggle } from '@/components/ui/ViewModeToggle';
import { TablePagination, useClientPagination } from '@/components/ui/TablePagination';

type StatusFilter = 'active' | 'inactive';
type PresetFilter = 'with' | 'without';
type SortField = 'name' | 'code' | 'presets' | 'status';
type SortDir = 'asc' | 'desc';
type SortConfig = { field: SortField; dir: SortDir };
type FilterSection = 'name' | 'presets' | 'status';

type AttributeFilters = {
  attributeIds: string[];
  presets: PresetFilter[];
  statuses: StatusFilter[];
};

const EMPTY_FILTERS: AttributeFilters = {
  attributeIds: [],
  presets: [],
  statuses: [],
};

const FILTER_PAGE_SIZE = 5;

const EMPTY_COLUMNS = {
  attributeName: true,
  code: true,
  presetValues: true,
  status: true,
  actions: true,
};

const COLUMN_OPTIONS = [
  { key: 'attributeName' as const, label: 'Attribute Name', locked: true },
  { key: 'code' as const, label: 'System Code', locked: false },
  { key: 'presetValues' as const, label: 'Preset Values', locked: false },
  { key: 'status' as const, label: 'Status', locked: false },
  { key: 'actions' as const, label: 'Actions', locked: false },
];

const SORT_OPTIONS: { field: SortField; dir: SortDir; label: string }[] = [
  { field: 'name', dir: 'asc', label: 'Name A-Z' },
  { field: 'name', dir: 'desc', label: 'Name Z-A' },
  { field: 'code', dir: 'asc', label: 'Code A-Z' },
  { field: 'code', dir: 'desc', label: 'Code Z-A' },
  { field: 'presets', dir: 'asc', label: 'Preset Count Ascending' },
  { field: 'presets', dir: 'desc', label: 'Preset Count Descending' },
  { field: 'status', dir: 'asc', label: 'Status Active first' },
  { field: 'status', dir: 'desc', label: 'Status Inactive first' },
];

const DEFAULT_SORT: SortConfig = { field: 'name', dir: 'asc' };
const DEFAULT_DATE_FROM = format(subDays(new Date(), 30), 'yyyy-MM-dd');
const DEFAULT_DATE_TO = format(new Date(), 'yyyy-MM-dd');

function normalizeId(value: unknown): string {
  if (value == null) return '';
  return String(value).trim();
}

function coerceFlag(value: unknown): boolean {
  if (typeof value === 'boolean') return value;
  if (typeof value === 'number') return value !== 0;
  if (value == null) return false;
  const normalized = String(value).trim().toLowerCase();
  if (['true', '1', 'yes', 'enabled', 'active'].includes(normalized)) return true;
  if (['false', '0', 'no', 'disabled', 'inactive', '', 'null', 'undefined'].includes(normalized)) return false;
  return false;
}

function isAttributeActive(status?: string): boolean {
  if (status == null || String(status).trim() === '') return true;
  return coerceFlag(status);
}

function presetList(attribute: AttributeTypeResponse): string[] {
  return (attribute.preset_values || []).filter((value) => String(value).trim() !== '');
}

function dayStartMs(isoDate: string): number {
  const [year, month, day] = isoDate.split('-').map(Number);
  if (!year || !month || !day) return NaN;
  return new Date(year, month - 1, day, 0, 0, 0, 0).getTime();
}

function dayEndMs(isoDate: string): number {
  const [year, month, day] = isoDate.split('-').map(Number);
  if (!year || !month || !day) return NaN;
  return new Date(year, month - 1, day, 23, 59, 59, 999).getTime();
}

export default function AttributesPage() {
  const [attributes, setAttributes] = useState<AttributeTypeResponse[]>([]);
  const [loading, setLoading] = useState(true);
  const [searchQuery, setSearchQuery] = useState('');
  const [viewMode, setViewMode] = useState<'table' | 'grid'>('table');
  const [openActionId, setOpenActionId] = useState<string | null>(null);
  const [showFilterPanel, setShowFilterPanel] = useState(false);
  const [showExportMenu, setShowExportMenu] = useState(false);
  const [showColumnsPanel, setShowColumnsPanel] = useState(false);
  const [showSortPanel, setShowSortPanel] = useState(false);
  const [showDatePanel, setShowDatePanel] = useState(false);
  const [draftFilters, setDraftFilters] = useState<AttributeFilters>(EMPTY_FILTERS);
  const [activeFilters, setActiveFilters] = useState<AttributeFilters>(EMPTY_FILTERS);
  const [expandedFilterSections, setExpandedFilterSections] = useState<Record<FilterSection, boolean>>({
    name: false,
    presets: true,
    status: false,
  });
  const [filterSectionSearch, setFilterSectionSearch] = useState({ name: '' });
  const [filterVisibleCounts, setFilterVisibleCounts] = useState({ name: FILTER_PAGE_SIZE });
  const [visibleColumns, setVisibleColumns] = useState(EMPTY_COLUMNS);
  const [sortConfig, setSortConfig] = useState<SortConfig>(DEFAULT_SORT);
  const [dateFrom, setDateFrom] = useState(DEFAULT_DATE_FROM);
  const [dateTo, setDateTo] = useState(DEFAULT_DATE_TO);
  const [draftDateFrom, setDraftDateFrom] = useState(DEFAULT_DATE_FROM);
  const [draftDateTo, setDraftDateTo] = useState(DEFAULT_DATE_TO);
  const [dateFilterEnabled, setDateFilterEnabled] = useState(false);
  const filterRef = useRef<HTMLDivElement>(null);
  const exportRef = useRef<HTMLDivElement>(null);
  const columnsRef = useRef<HTMLDivElement>(null);
  const sortRef = useRef<HTMLDivElement>(null);
  const dateRef = useRef<HTMLDivElement>(null);

  const [showAttributeModal, setShowAttributeModal] = useState(false);
  const [editingAttribute, setEditingAttribute] = useState<AttributeTypeResponse | null>(null);
  const [attrName, setAttrName] = useState('');
  const [attrCode, setAttrCode] = useState('');
  const [presetValues, setPresetValues] = useState<string[]>([]);
  const [newPresetInput, setNewPresetInput] = useState('');
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [deleteTarget, setDeleteTarget] = useState<{ id: string; name: string } | null>(null);
  const [isDeleting, setIsDeleting] = useState(false);

  const fetchData = async () => {
    setLoading(true);
    try {
      const fetchedAttrs = await catalogService.getAttributes();
      setAttributes(fetchedAttrs);
    } catch (err: any) {
      toast.error(err?.message || 'Failed to load master attributes');
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    fetchData();
  }, []);

  useEffect(() => {
    if (!showFilterPanel) return;
    const onPointerDown = (event: MouseEvent) => {
      if (!filterRef.current?.contains(event.target as Node)) setShowFilterPanel(false);
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setShowFilterPanel(false);
    };
    document.addEventListener('mousedown', onPointerDown);
    document.addEventListener('keydown', onKeyDown);
    return () => {
      document.removeEventListener('mousedown', onPointerDown);
      document.removeEventListener('keydown', onKeyDown);
    };
  }, [showFilterPanel]);

  useEffect(() => {
    if (!showExportMenu) return;
    const onPointerDown = (event: MouseEvent) => {
      if (!exportRef.current?.contains(event.target as Node)) setShowExportMenu(false);
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setShowExportMenu(false);
    };
    document.addEventListener('mousedown', onPointerDown);
    document.addEventListener('keydown', onKeyDown);
    return () => {
      document.removeEventListener('mousedown', onPointerDown);
      document.removeEventListener('keydown', onKeyDown);
    };
  }, [showExportMenu]);

  useEffect(() => {
    if (!showColumnsPanel) return;
    const onPointerDown = (event: MouseEvent) => {
      if (!columnsRef.current?.contains(event.target as Node)) setShowColumnsPanel(false);
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setShowColumnsPanel(false);
    };
    document.addEventListener('mousedown', onPointerDown);
    document.addEventListener('keydown', onKeyDown);
    return () => {
      document.removeEventListener('mousedown', onPointerDown);
      document.removeEventListener('keydown', onKeyDown);
    };
  }, [showColumnsPanel]);

  useEffect(() => {
    if (!showSortPanel) return;
    const onPointerDown = (event: MouseEvent) => {
      if (!sortRef.current?.contains(event.target as Node)) setShowSortPanel(false);
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setShowSortPanel(false);
    };
    document.addEventListener('mousedown', onPointerDown);
    document.addEventListener('keydown', onKeyDown);
    return () => {
      document.removeEventListener('mousedown', onPointerDown);
      document.removeEventListener('keydown', onKeyDown);
    };
  }, [showSortPanel]);

  useEffect(() => {
    if (!showDatePanel) return;
    const onPointerDown = (event: MouseEvent) => {
      if (!dateRef.current?.contains(event.target as Node)) setShowDatePanel(false);
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setShowDatePanel(false);
    };
    document.addEventListener('mousedown', onPointerDown);
    document.addEventListener('keydown', onKeyDown);
    return () => {
      document.removeEventListener('mousedown', onPointerDown);
      document.removeEventListener('keydown', onKeyDown);
    };
  }, [showDatePanel]);

  const closeOverlays = () => {
    setShowFilterPanel(false);
    setShowColumnsPanel(false);
    setShowSortPanel(false);
    setShowDatePanel(false);
  };

  const handleViewModeChange = (mode: 'table' | 'grid') => {
    setViewMode(mode);
    setOpenActionId(null);
    closeOverlays();
  };

  const handleOpenCreate = () => {
    setEditingAttribute(null);
    setAttrName('');
    setAttrCode('');
    setPresetValues([]);
    setNewPresetInput('');
    setShowAttributeModal(true);
  };

  const handleOpenEdit = (attribute: AttributeTypeResponse) => {
    setEditingAttribute(attribute);
    setAttrName(attribute.name);
    setAttrCode(attribute.code);
    setPresetValues(attribute.preset_values || []);
    setNewPresetInput('');
    setShowAttributeModal(true);
  };

  const closeAttributeDrawer = () => {
    if (isSubmitting) return;
    setShowAttributeModal(false);
  };

  const handleAddPresetValue = () => {
    const val = newPresetInput.trim();
    if (!val) return;
    if (presetValues.some((item) => item.toLowerCase() === val.toLowerCase())) {
      toast.error('Value already added');
      return;
    }
    setPresetValues([...presetValues, val]);
    setNewPresetInput('');
  };

  const handleRemovePresetValue = (idx: number) => {
    setPresetValues(presetValues.filter((_, i) => i !== idx));
  };

  const handleSubmitAttribute = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!attrName.trim() || !attrCode.trim()) {
      toast.error('Both Attribute Name and System Code are required');
      return;
    }
    setIsSubmitting(true);
    try {
      if (editingAttribute) {
        const updated = await catalogService.updateAttribute(editingAttribute.attribute_id, {
          name: attrName.trim(),
          code: attrCode.trim().toLowerCase(),
          preset_values: presetValues,
        });
        setAttributes(attributes.map((a) => (a.attribute_id === updated.attribute_id ? updated : a)));
        toast.success(`Attribute "${updated.name}" updated successfully`);
      } else {
        const created = await catalogService.createAttribute({
          name: attrName.trim(),
          code: attrCode.trim().toLowerCase(),
          preset_values: presetValues,
        });
        setAttributes([...attributes, created]);
        toast.success(`Attribute "${created.name}" created successfully`);
      }
      setAttrName('');
      setAttrCode('');
      setPresetValues([]);
      setNewPresetInput('');
      setEditingAttribute(null);
      setShowAttributeModal(false);
    } catch (err: any) {
      toast.error(err?.message || `Failed to ${editingAttribute ? 'update' : 'create'} attribute`);
    } finally {
      setIsSubmitting(false);
    }
  };

  const openDeleteModal = (id: string, name: string) => {
    setOpenActionId(null);
    setDeleteTarget({ id, name });
  };

  const closeDeleteModal = () => {
    if (isDeleting) return;
    setDeleteTarget(null);
  };

  const handleConfirmDelete = async () => {
    if (!deleteTarget) return;
    const { id, name } = deleteTarget;
    setIsDeleting(true);
    try {
      setAttributes((prev) => prev.filter((a) => a.attribute_id !== id));
      await catalogService.deleteAttribute(id);
      toast.success(`Master attribute "${name}" deleted successfully`);
      setDeleteTarget(null);
      fetchData();
    } catch (err: any) {
      toast.error(err?.message || 'Failed to delete master attribute');
      fetchData();
    } finally {
      setIsDeleting(false);
    }
  };

  const filteredAttributes = useMemo(() => {
    const q = searchQuery.trim().toLowerCase();
    const fromTs = dateFilterEnabled && dateFrom ? dayStartMs(dateFrom) : null;
    const toTs = dateFilterEnabled && dateTo ? dayEndMs(dateTo) : null;

    const result = attributes.filter((a) => {
      const values = presetList(a);
      const searchMatch =
        !q ||
        (a.name || '').toLowerCase().includes(q) ||
        (a.code || '').toLowerCase().includes(q) ||
        values.some((value) => value.toLowerCase().includes(q));

      const isActive = isAttributeActive(a.status);
      const statusMatch =
        activeFilters.statuses.length === 0 ||
        (activeFilters.statuses.includes('active') && isActive) ||
        (activeFilters.statuses.includes('inactive') && !isActive);

      const attributeMatch =
        activeFilters.attributeIds.length === 0 ||
        activeFilters.attributeIds.includes(normalizeId(a.attribute_id));

      const hasPresets = values.length > 0;
      const presetMatch =
        activeFilters.presets.length === 0 ||
        (activeFilters.presets.includes('with') && hasPresets) ||
        (activeFilters.presets.includes('without') && !hasPresets);

      let dateMatch = true;
      if (fromTs != null && toTs != null && !Number.isNaN(fromTs) && !Number.isNaN(toTs) && a.created_at) {
        const createdTs = new Date(a.created_at).getTime();
        if (!Number.isNaN(createdTs)) {
          dateMatch = createdTs >= fromTs && createdTs <= toTs;
        }
      }

      return searchMatch && attributeMatch && statusMatch && presetMatch && dateMatch;
    });

    const dir = sortConfig.dir === 'asc' ? 1 : -1;
    return [...result].sort((a, b) => {
      if (sortConfig.field === 'status') {
        return (Number(isAttributeActive(a.status)) - Number(isAttributeActive(b.status))) * dir;
      }
      if (sortConfig.field === 'presets') {
        return (presetList(a).length - presetList(b).length) * dir;
      }
      const left = sortConfig.field === 'code' ? a.code || '' : a.name || '';
      const right = sortConfig.field === 'code' ? b.code || '' : b.name || '';
      return left.localeCompare(right, undefined, { sensitivity: 'base' }) * dir;
    });
  }, [attributes, searchQuery, activeFilters, dateFrom, dateTo, dateFilterEnabled, sortConfig]);

  const pager = useClientPagination(filteredAttributes);

  const filtersActive =
    activeFilters.attributeIds.length > 0 ||
    activeFilters.presets.length > 0 ||
    activeFilters.statuses.length > 0;

  const sortedAttributeFilterOptions = useMemo(
    () => [...attributes].sort((a, b) => a.name.localeCompare(b.name)),
    [attributes]
  );

  const toggleFilterSection = (section: FilterSection) => {
    setExpandedFilterSections((prev) => ({ ...prev, [section]: !prev[section] }));
  };

  const toggleDraftListValue = <T extends string>(
    key: keyof Pick<AttributeFilters, 'attributeIds' | 'presets' | 'statuses'>,
    value: T
  ) => {
    setDraftFilters((prev) => {
      const current = prev[key] as T[];
      return {
        ...prev,
        [key]: current.includes(value) ? current.filter((item) => item !== value) : [...current, value],
      };
    });
  };

  const openFilterPanel = () => {
    setDraftFilters(activeFilters);
    setFilterSectionSearch({ name: '' });
    setFilterVisibleCounts({ name: FILTER_PAGE_SIZE });
    setShowColumnsPanel(false);
    setShowSortPanel(false);
    setShowDatePanel(false);
    setShowFilterPanel(true);
  };

  const visibleColumnCount = Object.values(visibleColumns).filter(Boolean).length;

  const toggleColumn = (key: keyof typeof EMPTY_COLUMNS) => {
    if (key === 'attributeName') return;
    setVisibleColumns((prev) => ({ ...prev, [key]: !prev[key] }));
  };

  const handleExportExcel = () => {
    if (filteredAttributes.length === 0) {
      toast.warning('No attributes to export');
      return;
    }
    const headers = ['S.No', 'Attribute Name', 'System Code', 'Preset Values', 'Status'];
    const rows = filteredAttributes.map((a, i) => [
      i + 1,
      a.name,
      a.code || '',
      presetList(a).join(', ') || 'None',
      isAttributeActive(a.status) ? 'Active' : 'Inactive',
    ]);
    const csvContent = [headers.join(','), ...rows.map((row) => row.map((val) => `"${String(val).replace(/"/g, '""')}"`).join(','))].join('\n');
    const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
    const url = URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = url;
    link.download = `ifixkart_attributes_${format(new Date(), 'yyyyMMdd')}.csv`;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
    URL.revokeObjectURL(url);
    setShowExportMenu(false);
    toast.success(`Downloaded ${filteredAttributes.length} ${filteredAttributes.length === 1 ? 'attribute' : 'attributes'} as CSV`);
  };

  const handleExportPDF = () => {
    if (filteredAttributes.length === 0) {
      toast.warning('No attributes to export');
      return;
    }
    const printWindow = window.open('', '_blank');
    if (!printWindow) {
      toast.error('Allow pop-ups to open the attributes print preview');
      return;
    }
    const html = `
      <html>
        <head>
          <title>iFixKart Master Attributes PDF Export</title>
          <style>
            body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; padding: 20px; color: #1e293b; }
            h2 { color: #0f172a; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; }
            table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 11px; }
            th { background-color: #0f172a; color: white; padding: 10px; text-align: left; }
            td { padding: 10px; border-bottom: 1px solid #e2e8f0; }
            tr:nth-child(even) { background-color: #f8fafc; }
          </style>
        </head>
        <body>
          <h2>iFixKart Master Attributes (${filteredAttributes.length} Records)</h2>
          <p>Exported on: ${format(new Date(), 'yyyy-MM-dd HH:mm:ss')}</p>
          <table>
            <thead>
              <tr>
                <th>S.No</th>
                <th>Attribute Name</th>
                <th>System Code</th>
                <th>Preset Values</th>
                <th>Status</th>
              </tr>
            </thead>
            <tbody>
              ${filteredAttributes.map((a, i) => `
                <tr>
                  <td>${i + 1}</td>
                  <td>${a.name}</td>
                  <td>${a.code || ''}</td>
                  <td>${presetList(a).join(', ') || 'None'}</td>
                  <td>${isAttributeActive(a.status) ? 'Active' : 'Inactive'}</td>
                </tr>
              `).join('')}
            </tbody>
          </table>
          <script>window.onload = function() { window.print(); }</script>
        </body>
      </html>
    `;
    printWindow.document.write(html);
    printWindow.document.close();
    setShowExportMenu(false);
    toast.success(`Print preview opened for ${filteredAttributes.length} ${filteredAttributes.length === 1 ? 'attribute' : 'attributes'}`);
  };

  const dataCardShell = 'crm-radius-section border border-border bg-card shadow-[0_1px_3px_rgba(16,24,40,0.06)] overflow-hidden min-w-0';

  const renderSortLabel = (label: string, field?: SortField, showIcon = true) => {
    const active = field != null && sortConfig.field === field;
    return (
      <span className="inline-flex items-center gap-1.5">
        {label}
        {showIcon && (
          <ArrowUpDown className={`w-3.5 h-3.5 shrink-0 ${active ? 'text-gray-700' : 'text-gray-400'}`} />
        )}
      </span>
    );
  };

  const renderStatusBadge = (active: boolean) => (
    <span
      className={`inline-flex items-center px-2.5 py-1 crm-radius-badge text-[11px] font-semibold ${
        active ? 'bg-success text-white' : 'bg-destructive text-white'
      }`}
    >
      {active ? 'Active' : 'Inactive'}
    </span>
  );

  const renderPresetBadges = (values: string[], limit?: number) => {
    if (values.length === 0) {
      return <span className="text-[13px] text-muted-foreground italic">No preset values</span>;
    }
    const shown = limit != null ? values.slice(0, limit) : values;
    const remaining = limit != null ? Math.max(values.length - shown.length, 0) : 0;
    return (
      <div className="flex flex-wrap gap-1.5">
        {shown.map((value) => (
          <span
            key={value}
            className="inline-flex items-center px-2 py-0.5 crm-radius-badge text-[11px] font-semibold bg-muted text-muted-foreground"
          >
            {value}
          </span>
        ))}
        {remaining > 0 && (
          <span className="inline-flex items-center px-2 py-0.5 crm-radius-badge text-[11px] font-semibold bg-primary/10 text-primary">
            +{remaining}
          </span>
        )}
      </div>
    );
  };

  const searchField = (
    <div className="relative flex-1 min-w-[180px] max-w-[480px]">
      <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground pointer-events-none" />
      <input
        type="text"
        placeholder="Search"
        value={searchQuery}
        onChange={(e) => setSearchQuery(e.target.value)}
        className="w-full h-9 pl-9 pr-3 crm-radius-control border border-border bg-card text-[13px] text-foreground placeholder:text-muted-foreground focus:outline-none focus:border-primary transition-colors"
      />
    </div>
  );

  const addAttributeButton = (
    <button
      type="button"
      onClick={handleOpenCreate}
      className="inline-flex items-center gap-2 h-9 px-4 crm-radius-control bg-primary hover:bg-primary/90 text-white text-[13px] font-semibold cursor-pointer shrink-0"
    >
      <span className="w-[18px] h-[18px] rounded-full bg-white text-primary flex items-center justify-center">
        <Plus className="w-3 h-3" strokeWidth={3} />
      </span>
      Add Attribute
    </button>
  );

  const viewToggle = <ViewModeToggle value={viewMode} onChange={handleViewModeChange} />;

  const renderFilterControl = (align: 'left' | 'right') => {
    const nameQuery = filterSectionSearch.name.trim().toLowerCase();
    const filteredNameOptions = sortedAttributeFilterOptions.filter(
      (attribute) =>
        !nameQuery ||
        attribute.name.toLowerCase().includes(nameQuery) ||
        (attribute.code || '').toLowerCase().includes(nameQuery)
    );
    const visibleNameOptions = filteredNameOptions.slice(0, filterVisibleCounts.name);

    const renderSectionSearch = (value: string, onChange: (next: string) => void) => (
      <div className="relative">
        <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 w-3.5 h-3.5 text-muted-foreground pointer-events-none" />
        <input
          type="text"
          placeholder="Search"
          value={value}
          onChange={(e) => {
            onChange(e.target.value);
            setFilterVisibleCounts({ name: FILTER_PAGE_SIZE });
          }}
          className="w-full h-8 pl-8 pr-3 crm-radius-control border border-border bg-card text-[12px] text-foreground placeholder:text-muted-foreground focus:outline-none focus:border-primary"
        />
      </div>
    );

    const renderCheckboxOption = (checked: boolean, onToggle: () => void, label: string, icon?: ReactNode) => (
      <label className="flex items-center gap-2.5 py-1.5 cursor-pointer">
        <input
          type="checkbox"
          checked={checked}
          onChange={onToggle}
          className="w-3.5 h-3.5 rounded-[3px] border-border text-primary focus:ring-primary cursor-pointer"
        />
        {icon}
        <span className="text-[13px] text-muted-foreground">{label}</span>
      </label>
    );

    return (
      <div className="relative shrink-0" ref={filterRef}>
        <button
          type="button"
          onClick={() => (showFilterPanel ? setShowFilterPanel(false) : openFilterPanel())}
          className={`inline-flex items-center gap-1.5 h-9 px-3 crm-radius-control text-[13px] font-medium cursor-pointer transition-colors ${
            showFilterPanel || filtersActive
              ? 'bg-primary text-white'
              : 'border border-border bg-card text-foreground hover:bg-muted'
          }`}
        >
          <Filter className="w-3.5 h-3.5" />
          Filter
          {filtersActive && !showFilterPanel && <span className="w-1.5 h-1.5 rounded-full bg-white" />}
          <ChevronDown
            className={`w-3.5 h-3.5 transition-transform ${showFilterPanel ? 'rotate-180' : ''} ${
              showFilterPanel || filtersActive ? 'text-white/80' : 'text-muted-foreground'
            }`}
          />
        </button>
        <AnimatePresence>
          {showFilterPanel && (
            <motion.div
              initial={{ opacity: 0, y: -6 }}
              animate={{ opacity: 1, y: 0 }}
              exit={{ opacity: 0, y: -6 }}
              transition={{ duration: 0.16, ease: 'easeOut' }}
              className={`absolute ${align === 'right' ? 'right-0' : 'left-0'} top-full mt-1.5 z-50 w-[320px] max-w-[calc(100vw-2rem)] crm-radius-card border border-border bg-card shadow-lg overflow-hidden`}
            >
              <div className="flex items-center justify-between px-4 py-3 border-b border-border">
                <span className="inline-flex items-center gap-2 text-[14px] font-semibold text-foreground">
                  <Filter className="w-4 h-4" />
                  Filter
                </span>
                <button
                  type="button"
                  aria-label="Close filters"
                  onClick={() => setShowFilterPanel(false)}
                  className="w-7 h-7 rounded-full bg-primary/10 text-primary hover:bg-primary hover:text-white cursor-pointer transition-colors flex items-center justify-center"
                >
                  <X className="w-3.5 h-3.5" />
                </button>
              </div>

              <div className="max-h-[420px] overflow-y-auto">
                <div className="border-b border-border">
                  <button
                    type="button"
                    onClick={() => toggleFilterSection('name')}
                    className="w-full flex items-center gap-2 px-4 py-3 text-[13px] font-semibold text-foreground hover:bg-muted/20 cursor-pointer"
                  >
                    <ChevronRight className={`w-3.5 h-3.5 transition-transform ${expandedFilterSections.name ? 'rotate-90' : ''}`} />
                    Attribute Name
                  </button>
                  {expandedFilterSections.name && (
                    <div className="px-4 pb-4">
                      <div className="crm-radius-control border border-border bg-muted/20 p-3 space-y-2">
                        {renderSectionSearch(filterSectionSearch.name, (value) =>
                          setFilterSectionSearch({ name: value })
                        )}
                        <div className="space-y-0.5">
                          {visibleNameOptions.length === 0 ? (
                            <p className="py-2 text-[12px] text-muted-foreground">No attributes found.</p>
                          ) : (
                            visibleNameOptions.map((attribute) => {
                              const id = normalizeId(attribute.attribute_id);
                              return renderCheckboxOption(
                                draftFilters.attributeIds.includes(id),
                                () => toggleDraftListValue('attributeIds', id),
                                attribute.name,
                                (
                                  <div className="w-7 h-7 rounded-full bg-primary/10 text-primary flex items-center justify-center shrink-0">
                                    <Sliders className="w-3.5 h-3.5" />
                                  </div>
                                )
                              );
                            })
                          )}
                        </div>
                        {filteredNameOptions.length > visibleNameOptions.length && (
                          <button
                            type="button"
                            onClick={() =>
                              setFilterVisibleCounts((prev) => ({ name: prev.name + FILTER_PAGE_SIZE }))
                            }
                            className="text-[12px] font-medium text-primary underline underline-offset-2 cursor-pointer"
                          >
                            Load More
                          </button>
                        )}
                      </div>
                    </div>
                  )}
                </div>

                <div className="border-b border-border">
                  <button
                    type="button"
                    onClick={() => toggleFilterSection('presets')}
                    className="w-full flex items-center gap-2 px-4 py-3 text-[13px] font-semibold text-foreground hover:bg-muted/20 cursor-pointer"
                  >
                    <ChevronRight className={`w-3.5 h-3.5 transition-transform ${expandedFilterSections.presets ? 'rotate-90' : ''}`} />
                    Preset Values
                  </button>
                  {expandedFilterSections.presets && (
                    <div className="px-4 pb-4">
                      <div className="crm-radius-control border border-border bg-muted/20 p-3 space-y-1">
                        {renderCheckboxOption(
                          draftFilters.presets.includes('with'),
                          () => toggleDraftListValue('presets', 'with'),
                          'With presets'
                        )}
                        {renderCheckboxOption(
                          draftFilters.presets.includes('without'),
                          () => toggleDraftListValue('presets', 'without'),
                          'Without presets'
                        )}
                      </div>
                    </div>
                  )}
                </div>

                <div>
                  <button
                    type="button"
                    onClick={() => toggleFilterSection('status')}
                    className="w-full flex items-center gap-2 px-4 py-3 text-[13px] font-semibold text-foreground hover:bg-muted/20 cursor-pointer"
                  >
                    <ChevronRight className={`w-3.5 h-3.5 transition-transform ${expandedFilterSections.status ? 'rotate-90' : ''}`} />
                    Status
                  </button>
                  {expandedFilterSections.status && (
                    <div className="px-4 pb-4">
                      <div className="crm-radius-control border border-border bg-muted/20 p-3 space-y-1">
                        {renderCheckboxOption(
                          draftFilters.statuses.includes('active'),
                          () => toggleDraftListValue('statuses', 'active'),
                          'Active'
                        )}
                        {renderCheckboxOption(
                          draftFilters.statuses.includes('inactive'),
                          () => toggleDraftListValue('statuses', 'inactive'),
                          'Inactive'
                        )}
                      </div>
                    </div>
                  )}
                </div>
              </div>

              <div className="flex items-center gap-3 px-4 py-3 border-t border-border">
                <button
                  type="button"
                  onClick={() => {
                    setDraftFilters(EMPTY_FILTERS);
                    setActiveFilters(EMPTY_FILTERS);
                    setShowFilterPanel(false);
                  }}
                  className="flex-1 h-9 crm-radius-control border border-border bg-card text-[13px] font-medium text-foreground hover:bg-muted cursor-pointer"
                >
                  Reset
                </button>
                <button
                  type="button"
                  onClick={() => {
                    setActiveFilters(draftFilters);
                    setShowFilterPanel(false);
                  }}
                  className="flex-1 h-9 crm-radius-control bg-primary text-white text-[13px] font-semibold cursor-pointer hover:bg-primary/90"
                >
                  Filter
                </button>
              </div>
            </motion.div>
          )}
        </AnimatePresence>
      </div>
    );
  };

  const manageColumnsControl = (
    <div className="relative shrink-0" ref={columnsRef}>
      <button
        type="button"
        onClick={() => {
          const next = !showColumnsPanel;
          setShowFilterPanel(false);
          setShowSortPanel(false);
          setShowDatePanel(false);
          setShowColumnsPanel(next);
        }}
        className="inline-flex items-center gap-1.5 h-9 px-3 crm-radius-control text-[13px] font-medium cursor-pointer transition-colors bg-primary/10 text-primary border border-primary/25 hover:bg-primary/15"
      >
        <Columns3 className="w-3.5 h-3.5" />
        Manage Columns
      </button>
      {showColumnsPanel && (
        <div className="absolute right-0 top-full mt-1.5 z-50 w-[240px] crm-radius-card border border-border bg-card shadow-lg py-1.5 overflow-hidden">
          {COLUMN_OPTIONS.map((col) => (
            <div key={col.key} className="flex items-center gap-2 px-3 py-1.5">
              <GripVertical className="w-3.5 h-3.5 text-muted-foreground shrink-0" />
              <span className="flex-1 text-[13px] text-foreground truncate">{col.label}</span>
              <button
                type="button"
                role="switch"
                aria-checked={visibleColumns[col.key]}
                aria-label={`Toggle ${col.label}`}
                disabled={col.locked}
                title={col.locked ? 'Attribute Name stays visible' : `Toggle ${col.label}`}
                onClick={() => toggleColumn(col.key)}
                className={`relative w-8 h-[18px] rounded-full shrink-0 transition-colors ${
                  visibleColumns[col.key] ? 'bg-primary' : 'bg-muted'
                } ${col.locked ? 'opacity-60 cursor-not-allowed' : 'cursor-pointer'}`}
              >
                <span
                  className={`absolute top-[2px] w-3.5 h-3.5 rounded-full bg-white shadow-xs transition-all ${
                    visibleColumns[col.key] ? 'left-[14px]' : 'left-[2px]'
                  }`}
                />
              </button>
            </div>
          ))}
        </div>
      )}
    </div>
  );

  const sortControl = (
    <div className="relative shrink-0" ref={sortRef}>
      <button
        type="button"
        onClick={() => {
          const next = !showSortPanel;
          setShowFilterPanel(false);
          setShowColumnsPanel(false);
          setShowDatePanel(false);
          setShowSortPanel(next);
        }}
        className={`inline-flex items-center gap-1.5 h-9 px-3 crm-radius-control border border-border text-[13px] font-medium cursor-pointer transition-colors ${
          showSortPanel || sortConfig.field !== DEFAULT_SORT.field || sortConfig.dir !== DEFAULT_SORT.dir
            ? 'bg-muted text-foreground'
            : 'bg-card text-foreground hover:bg-muted'
        }`}
      >
        <ArrowUpDown className="w-3.5 h-3.5" />
        Sort By
        <ChevronDown className={`w-3.5 h-3.5 text-muted-foreground transition-transform ${showSortPanel ? 'rotate-180' : ''}`} />
      </button>
      {showSortPanel && (
        <div className="absolute left-0 top-full mt-1.5 z-50 w-56 crm-radius-card border border-border bg-card shadow-lg py-1 overflow-hidden">
          {SORT_OPTIONS.map((option) => {
            const active = option.field === sortConfig.field && option.dir === sortConfig.dir;
            return (
              <button
                key={`${option.field}-${option.dir}`}
                type="button"
                onClick={() => {
                  setSortConfig({ field: option.field, dir: option.dir });
                  setShowSortPanel(false);
                }}
                className={`w-full text-left px-3 py-1.5 text-[13px] cursor-pointer ${
                  active ? 'bg-primary/10 text-primary font-medium' : 'text-foreground hover:bg-muted'
                }`}
              >
                {option.label}
              </button>
            );
          })}
        </div>
      )}
    </div>
  );

  const dateRangeLabel = `${format(new Date(dayStartMs(dateFrom || DEFAULT_DATE_FROM)), 'd MMM yy')} - ${format(new Date(dayStartMs(dateTo || DEFAULT_DATE_TO)), 'd MMM yy')}`;

  const dateControl = (
    <div className="relative shrink-0" ref={dateRef}>
      <button
        type="button"
        onClick={() => {
          const next = !showDatePanel;
          setShowFilterPanel(false);
          setShowColumnsPanel(false);
          setShowSortPanel(false);
          if (next) {
            setDraftDateFrom(dateFrom || DEFAULT_DATE_FROM);
            setDraftDateTo(dateTo || DEFAULT_DATE_TO);
            setShowDatePanel(true);
          } else {
            setShowDatePanel(false);
          }
        }}
        className={`inline-flex items-center gap-1.5 h-9 px-3 crm-radius-control border border-border text-[13px] font-medium cursor-pointer transition-colors ${
          showDatePanel || dateFilterEnabled
            ? 'bg-muted text-foreground'
            : 'bg-card text-foreground hover:bg-muted'
        }`}
      >
        <Calendar className="w-3.5 h-3.5" />
        {dateRangeLabel}
      </button>
      {showDatePanel && (
        <div className="absolute left-0 top-full mt-1.5 z-50 w-72 crm-radius-card border border-border bg-card shadow-lg overflow-hidden">
          <div className="px-3.5 py-3 space-y-2.5">
            <div>
              <label className="block text-[10px] font-semibold tracking-wide text-muted-foreground uppercase mb-1">From</label>
              <input
                type="date"
                value={draftDateFrom}
                onChange={(e) => setDraftDateFrom(e.target.value)}
                className="w-full h-8 px-2.5 crm-radius-control border border-border bg-card text-[13px] text-foreground outline-none focus:border-primary"
              />
            </div>
            <div>
              <label className="block text-[10px] font-semibold tracking-wide text-muted-foreground uppercase mb-1">To</label>
              <input
                type="date"
                value={draftDateTo}
                onChange={(e) => setDraftDateTo(e.target.value)}
                className="w-full h-8 px-2.5 crm-radius-control border border-border bg-card text-[13px] text-foreground outline-none focus:border-primary"
              />
            </div>
          </div>
          <div className="flex items-center justify-between gap-2 px-3.5 py-2.5 border-t border-border">
            <button
              type="button"
              onClick={() => {
                setDateFrom(DEFAULT_DATE_FROM);
                setDateTo(DEFAULT_DATE_TO);
                setDraftDateFrom(DEFAULT_DATE_FROM);
                setDraftDateTo(DEFAULT_DATE_TO);
                setDateFilterEnabled(false);
                setShowDatePanel(false);
              }}
              className="h-8 px-3 crm-radius-control border border-border bg-card text-[12px] font-medium text-foreground hover:bg-muted cursor-pointer"
            >
              Clear
            </button>
            <button
              type="button"
              onClick={() => {
                if (!draftDateFrom || !draftDateTo) {
                  toast.error('Choose a start date and an end date');
                  return;
                }
                if (draftDateFrom > draftDateTo) {
                  toast.error('Start date must be earlier than the end date');
                  return;
                }
                setDateFrom(draftDateFrom);
                setDateTo(draftDateTo);
                setDateFilterEnabled(true);
                setShowDatePanel(false);
              }}
              className="h-8 px-3 crm-radius-control bg-primary text-primary-foreground text-[12px] font-medium cursor-pointer hover:bg-primary/90"
            >
              Apply
            </button>
          </div>
        </div>
      )}
    </div>
  );

  const emptyMessage =
    searchQuery || filtersActive || dateFilterEnabled ? 'No attributes match your search.' : 'No master attributes found.';

  return (
    <div className="flex flex-col gap-5 min-w-0">
      <div className="flex flex-wrap items-start justify-between gap-3 min-w-0">
        <div className="min-w-0">
          <div className="flex items-center gap-2">
            <h1 className="text-lg font-semibold text-foreground">Master Attributes</h1>
            <span className="inline-flex items-center justify-center min-w-5 h-5 px-1.5 crm-radius-toggle bg-primary/10 text-primary text-[11px] font-semibold leading-none">
              {attributes.length}
            </span>
          </div>
        </div>

        <div className="flex items-center gap-3 shrink-0">
          <div className="relative" ref={exportRef}>
            <button
              type="button"
              onClick={() => setShowExportMenu((open) => !open)}
              className="inline-flex items-center gap-1.5 h-8 px-2.5 crm-radius-control border border-border bg-card text-[13px] font-medium text-foreground hover:bg-muted cursor-pointer"
            >
              <Box className="w-3.5 h-3.5" />
              Export
              <ChevronDown className="w-3.5 h-3.5 text-muted-foreground" />
            </button>
            {showExportMenu && (
              <div className="absolute right-0 top-full mt-1.5 z-50 w-48 crm-radius-card border border-border bg-card shadow-lg py-1 overflow-hidden">
                <button
                  type="button"
                  onClick={handleExportPDF}
                  className="w-full flex items-center gap-2 px-3 py-2 text-[13px] text-muted-foreground hover:bg-muted hover:text-foreground cursor-pointer"
                >
                  <FileText className="w-4 h-4 text-destructive" />
                  Export as PDF
                </button>
                <button
                  type="button"
                  onClick={handleExportExcel}
                  className="w-full flex items-center gap-2 px-3 py-2 text-[13px] text-muted-foreground hover:bg-muted hover:text-foreground cursor-pointer"
                >
                  <FileSpreadsheet className="w-4 h-4 text-green-600" />
                  Export as Excel
                </button>
              </div>
            )}
          </div>

          <button
            type="button"
            onClick={fetchData}
            className="w-8 h-8 crm-radius-control border border-border bg-card text-muted-foreground hover:text-foreground hover:bg-muted cursor-pointer transition-colors flex items-center justify-center"
            title="Reload Data"
          >
            <RefreshCw className="w-3.5 h-3.5" />
          </button>
        </div>
      </div>

      {viewMode === 'grid' ? (
        <div className={dataCardShell}>
          <div className="px-5 pt-5">
            <div className="-mx-5 px-5 flex flex-wrap items-center justify-between gap-3 min-w-0 pb-4 border-b border-border">
              <div className="flex flex-wrap items-center gap-3 min-w-0 flex-1">
                {renderFilterControl('left')}
                {searchField}
              </div>
              <div className="flex items-center gap-3 shrink-0">
                {viewToggle}
                {addAttributeButton}
              </div>
            </div>
          </div>

          {loading ? (
            <div className="flex flex-col items-center justify-center py-16 gap-2.5">
              <RefreshCw className="w-6 h-6 text-primary animate-spin" />
              <span className="text-[13px] text-muted-foreground">Loading master attributes...</span>
            </div>
          ) : filteredAttributes.length === 0 ? (
            <div className="py-12 text-center text-[13px] text-muted-foreground">{emptyMessage}</div>
          ) : (
            <div className="p-5 mt-4">
              <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
                {pager.items.map((a) => (
                  <div
                    key={a.attribute_id}
                    className="relative crm-radius-section border border-border bg-card p-5 min-w-0 shadow-sm hover:shadow-md transition-shadow"
                  >
                    <div className="absolute top-4 right-4 z-10">
                      <RowActionsMenu
                        open={openActionId === a.attribute_id}
                        onOpenChange={(open) => setOpenActionId(open ? a.attribute_id : null)}
                        onEdit={() => handleOpenEdit(a)}
                        onDelete={() => openDeleteModal(a.attribute_id, a.name)}
                      />
                    </div>
                    <div className="flex items-start gap-3 pr-8 min-w-0">
                      <div className="w-10 h-10 crm-radius-icon bg-primary/10 text-primary flex items-center justify-center shrink-0">
                        <Sliders className="w-4 h-4" />
                      </div>
                      <div className="min-w-0">
                        <p className="text-[14px] font-semibold text-foreground truncate">{a.name}</p>
                        <p className="text-[12px] text-muted-foreground truncate mt-0.5">{a.code}</p>
                      </div>
                    </div>
                    <div className="mt-4">{renderPresetBadges(presetList(a), 4)}</div>
                    <div className="mt-4 flex flex-wrap items-center gap-2">
                      {renderStatusBadge(isAttributeActive(a.status))}
                    </div>
                  </div>
                ))}
              </div>
            </div>
          )}
          <TablePagination {...pager} />
        </div>
      ) : (
        <div className={dataCardShell}>
          <div className="px-5 pt-5">
            <div className="flex flex-wrap items-center justify-between gap-4 w-full min-w-0 pb-4 border-b border-border">
              {searchField}
              {addAttributeButton}
            </div>
            <div className="flex flex-wrap lg:flex-nowrap items-center justify-between gap-3 w-full min-w-0 py-4">
              <div className="flex flex-wrap items-center gap-2 min-w-0">
                {sortControl}
                {dateControl}
              </div>
              <div className="flex flex-wrap items-center gap-2 shrink-0">
                {renderFilterControl('right')}
                {manageColumnsControl}
                {viewToggle}
              </div>
            </div>
          </div>

          {loading ? (
            <div className="flex flex-col items-center justify-center py-16 gap-2.5 border-t border-border">
              <RefreshCw className="w-6 h-6 text-primary animate-spin" />
              <span className="text-[13px] text-muted-foreground">Loading master attributes...</span>
            </div>
          ) : (
            <div className="overflow-x-auto border-t border-border">
              <table className="crm-data-table min-w-[760px]">
                <thead>
                  <tr className="bg-gray-50 border-y border-gray-200">
                    {visibleColumns.attributeName && (
                      <th className="px-5 py-3 text-left text-[13px] font-semibold text-gray-700 whitespace-nowrap">
                        {renderSortLabel('Attribute Name', 'name')}
                      </th>
                    )}
                    {visibleColumns.code && (
                      <th className="px-5 py-3 text-left text-[13px] font-semibold text-gray-700 whitespace-nowrap">
                        {renderSortLabel('System Code', 'code')}
                      </th>
                    )}
                    {visibleColumns.presetValues && (
                      <th className="px-5 py-3 text-left text-[13px] font-semibold text-gray-700 whitespace-nowrap">
                        {renderSortLabel('Preset Values', 'presets')}
                      </th>
                    )}
                    {visibleColumns.status && (
                      <th className="px-5 py-3 text-left text-[13px] font-semibold text-gray-700 whitespace-nowrap">
                        {renderSortLabel('Status', 'status')}
                      </th>
                    )}
                    {visibleColumns.actions && (
                      <th className="px-5 py-3 text-center text-[13px] font-semibold text-gray-700 whitespace-nowrap">
                        {renderSortLabel('Action')}
                      </th>
                    )}
                  </tr>
                </thead>
                <tbody className="bg-card">
                  {filteredAttributes.length === 0 ? (
                    <tr>
                      <td colSpan={Math.max(visibleColumnCount, 1)} className="text-center py-12 text-[13px] text-muted-foreground">
                        {emptyMessage}
                      </td>
                    </tr>
                  ) : (
                    pager.items.map((a) => (
                      <tr key={a.attribute_id} className="border-t border-border hover:bg-muted/10 transition-colors">
                        {visibleColumns.attributeName && (
                          <td className="px-5 py-3.5">
                            <div className="flex items-center gap-3 min-w-0">
                              <div className="w-9 h-9 crm-radius-icon bg-primary/10 text-primary flex items-center justify-center shrink-0">
                                <Sliders className="w-4 h-4" />
                              </div>
                              <div className="min-w-0">
                                <p className="text-[13px] font-semibold text-foreground truncate">{a.name}</p>
                                <p className="text-[11px] text-muted-foreground truncate">{a.code}</p>
                              </div>
                            </div>
                          </td>
                        )}
                        {visibleColumns.code && (
                          <td className="px-5 py-3.5 text-[13px] font-mono text-muted-foreground">{a.code}</td>
                        )}
                        {visibleColumns.presetValues && (
                          <td className="px-5 py-3.5">{renderPresetBadges(presetList(a), 5)}</td>
                        )}
                        {visibleColumns.status && (
                          <td className="px-5 py-3.5">{renderStatusBadge(isAttributeActive(a.status))}</td>
                        )}
                        {visibleColumns.actions && (
                          <td className="px-5 py-3.5">
                            <div className="flex items-center justify-center">
                              <RowActionsMenu
                                open={openActionId === a.attribute_id}
                                onOpenChange={(open) => setOpenActionId(open ? a.attribute_id : null)}
                                onEdit={() => handleOpenEdit(a)}
                                onDelete={() => openDeleteModal(a.attribute_id, a.name)}
                              />
                            </div>
                          </td>
                        )}
                      </tr>
                    ))
                  )}
                </tbody>
              </table>
            </div>
          )}
          <TablePagination {...pager} />
        </div>
      )}

      {deleteTarget && (
        <div
          className="fixed inset-0 z-[100] flex items-center justify-center bg-black/50 p-4"
          onClick={closeDeleteModal}
        >
          <div
            role="dialog"
            aria-modal="true"
            aria-labelledby="delete-attribute-title"
            className="bg-card border border-border shadow-2xl w-full max-w-sm overflow-hidden crm-radius-none"
            onClick={(e) => e.stopPropagation()}
          >
            <div className="flex items-start justify-between gap-3 px-5 pt-5 pb-2">
              <div className="flex items-start gap-3 min-w-0">
                <div className="w-10 h-10 rounded-full bg-destructive/10 text-destructive flex items-center justify-center shrink-0">
                  <AlertTriangle className="w-5 h-5" />
                </div>
                <div className="min-w-0">
                  <h3 id="delete-attribute-title" className="text-[15px] font-semibold text-foreground">
                    Delete Attribute
                  </h3>
                  <p className="text-[13px] text-muted-foreground mt-1 leading-relaxed">
                    Are you sure you want to delete{' '}
                    <span className="font-semibold text-foreground">&quot;{deleteTarget.name}&quot;</span>? Products
                    using this attribute may lose these preset values.
                  </p>
                </div>
              </div>
              <button
                type="button"
                aria-label="Close delete dialog"
                onClick={closeDeleteModal}
                disabled={isDeleting}
                className="w-8 h-8 rounded-full border border-border text-muted-foreground hover:bg-muted cursor-pointer transition-colors flex items-center justify-center shrink-0 disabled:opacity-50"
              >
                <X className="w-4 h-4" />
              </button>
            </div>
            <div className="flex items-center justify-end gap-2 px-5 pb-5 pt-3">
              <button
                type="button"
                onClick={closeDeleteModal}
                disabled={isDeleting}
                className="h-9 px-4 crm-radius-control border border-border bg-card text-[13px] font-medium text-foreground hover:bg-muted cursor-pointer transition-colors disabled:opacity-50"
              >
                Cancel
              </button>
              <button
                type="button"
                onClick={handleConfirmDelete}
                disabled={isDeleting}
                className="h-9 px-4 crm-radius-control bg-destructive hover:bg-destructive/90 text-white text-[13px] font-semibold cursor-pointer transition-colors disabled:opacity-50 inline-flex items-center gap-2"
              >
                {isDeleting ? (
                  <>
                    <RefreshCw className="w-3.5 h-3.5 animate-spin" />
                    Deleting...
                  </>
                ) : (
                  <>
                    <Trash2 className="w-3.5 h-3.5" />
                    Delete Attribute
                  </>
                )}
              </button>
            </div>
          </div>
        </div>
      )}

      <SlideOver
        open={showAttributeModal}
        onClose={closeAttributeDrawer}
        title={editingAttribute ? 'Edit Master Attribute' : 'Create Master Attribute'}
        icon={<Sliders className="w-4 h-4 text-primary shrink-0" />}
      >
        <form onSubmit={handleSubmitAttribute} className="flex min-h-0 flex-1 flex-col">
          <div className="flex-1 min-h-0 overflow-y-auto px-5 py-4 space-y-4">
            <div>
              <label className="block text-[11px] font-semibold text-muted-foreground uppercase mb-1.5">
                Attribute Name <span className="text-primary">*</span>
              </label>
              <input
                type="text"
                placeholder="e.g. Storage Capacity, Color"
                value={attrName}
                onChange={(e) => setAttrName(e.target.value)}
                className="w-full h-9 px-3 bg-card border border-border crm-radius-control text-[13px] text-foreground focus:outline-none focus:border-primary transition-colors"
              />
            </div>

            <div>
              <label className="block text-[11px] font-semibold text-muted-foreground uppercase mb-1.5">
                System Code <span className="text-primary">*</span>
              </label>
              <input
                type="text"
                placeholder="e.g. storage, color"
                value={attrCode}
                onChange={(e) => setAttrCode(e.target.value)}
                disabled={editingAttribute !== null}
                className="w-full h-9 px-3 bg-card border border-border crm-radius-control text-[13px] text-foreground focus:outline-none focus:border-primary transition-colors disabled:opacity-60 disabled:bg-muted/40"
              />
            </div>

            <div className="space-y-2">
              <label className="block text-[11px] font-semibold text-muted-foreground uppercase">
                Pre-stored Values
              </label>
              <p className="text-[12px] text-muted-foreground">
                These values appear as dropdown choices when creating or editing products.
              </p>
              <div className="flex gap-2">
                <input
                  type="text"
                  placeholder="e.g. 128GB, Midnight, Blue..."
                  value={newPresetInput}
                  onChange={(e) => setNewPresetInput(e.target.value)}
                  onKeyDown={(e) => {
                    if (e.key === 'Enter') {
                      e.preventDefault();
                      handleAddPresetValue();
                    }
                  }}
                  className="flex-1 h-9 px-3 bg-card border border-border crm-radius-control text-[13px] text-foreground outline-none focus:border-primary"
                />
                <button
                  type="button"
                  onClick={handleAddPresetValue}
                  className="h-9 px-3 bg-primary hover:bg-primary/90 text-white crm-radius-control text-[13px] font-semibold cursor-pointer shrink-0"
                >
                  Add Value
                </button>
              </div>

              <div className="flex flex-wrap gap-1.5 min-h-[40px] p-3 bg-muted/20 border border-border crm-radius-control items-center">
                {presetValues.length === 0 ? (
                  <span className="text-[12px] text-muted-foreground italic">
                    No preset values added yet. Type a value above and click Add.
                  </span>
                ) : (
                  presetValues.map((val, idx) => (
                    <span
                      key={`${val}-${idx}`}
                      className="inline-flex items-center gap-1.5 px-2 py-0.5 crm-radius-badge text-[11px] font-semibold bg-muted text-foreground"
                    >
                      <span>{val}</span>
                      <button
                        type="button"
                        onClick={() => handleRemovePresetValue(idx)}
                        className="text-muted-foreground hover:text-destructive cursor-pointer"
                        aria-label={`Remove ${val}`}
                      >
                        <X className="w-3 h-3" />
                      </button>
                    </span>
                  ))
                )}
              </div>
            </div>
          </div>

          <div className="shrink-0 border-t border-border px-5 py-3 flex items-center justify-end gap-2 bg-card">
            <button
              type="button"
              onClick={closeAttributeDrawer}
              disabled={isSubmitting}
              className="h-8 px-3.5 bg-card hover:bg-muted border border-border text-foreground crm-radius-control text-[13px] font-medium transition-colors cursor-pointer disabled:opacity-50"
            >
              Cancel
            </button>
            <button
              type="submit"
              disabled={isSubmitting}
              className="h-8 px-3.5 bg-primary hover:bg-primary/90 text-primary-foreground crm-radius-control text-[13px] font-medium transition-colors cursor-pointer disabled:opacity-60"
            >
              {isSubmitting ? 'Saving...' : editingAttribute ? 'Save Changes' : 'Create Attribute'}
            </button>
          </div>
        </form>
      </SlideOver>
    </div>
  );
}