'use client';

import { useEffect, useId, useRef, useState } from 'react';
import { ChevronDown } from 'lucide-react';

export interface CustomSelectOption {
  value: string;
  label: string;
}

interface CustomSelectProps {
  value: string;
  onChange: (value: string) => void;
  options: CustomSelectOption[];
  placeholder?: string;
  className?: string;
  disabled?: boolean;
  size?: 'md' | 'sm';
  'aria-label'?: string;
}

export function CustomSelect({
  value,
  onChange,
  options,
  placeholder = 'Select',
  className = '',
  disabled = false,
  size = 'md',
  'aria-label': ariaLabel,
}: CustomSelectProps) {
  const [open, setOpen] = useState(false);
  const rootRef = useRef<HTMLDivElement>(null);
  const listId = useId();
  const selected = options.find((option) => option.value === value);
  const compact = size === 'sm';

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

  return (
    <div ref={rootRef} className={`relative min-w-0 ${className}`}>
      <button
        type="button"
        disabled={disabled}
        aria-haspopup="listbox"
        aria-expanded={open}
        aria-controls={listId}
        aria-label={ariaLabel}
        onClick={() => !disabled && setOpen((current) => !current)}
        className={`relative w-full pl-3 pr-8 bg-card text-left text-foreground crm-radius-section border border-border cursor-pointer transition-colors flex items-center truncate disabled:opacity-50 ${
          compact ? 'h-8 text-[12px]' : 'h-9 text-[13px]'
        }`}
      >
        <span className={`truncate ${selected ? 'text-foreground' : 'text-muted-foreground'}`}>
          {selected?.label || placeholder}
        </span>
        <ChevronDown
          className={`absolute right-2.5 top-1/2 -translate-y-1/2 w-3.5 h-3.5 text-foreground pointer-events-none transition-transform duration-200 ${
            open ? 'rotate-180' : ''
          }`}
        />
      </button>

      {open && (
        <ul
          id={listId}
          role="listbox"
          className="absolute left-0 top-full mt-1 z-50 w-full max-h-60 overflow-y-auto bg-card border border-border crm-radius-section p-1.5 shadow-[0_8px_24px_rgba(16,24,40,0.12)]"
        >
          {options.length === 0 ? (
            <li className="px-3 py-2 text-[13px] text-muted-foreground">No options</li>
          ) : (
            options.map((option) => {
              const isSelected = option.value === value;
              return (
                <li key={option.value} role="option" aria-selected={isSelected}>
                  <button
                    type="button"
                    onClick={() => {
                      onChange(option.value);
                      setOpen(false);
                    }}
                    className={`w-full text-left px-3 py-2 text-[13px] cursor-pointer crm-radius-section transition-colors ${
                      isSelected
                        ? 'bg-[#eef0f4] text-[#3d4654]'
                        : 'text-[#6b7280] hover:bg-[#eef0f4] hover:text-[#3d4654]'
                    }`}
                  >
                    {option.label}
                  </button>
                </li>
              );
            })
          )}
        </ul>
      )}
    </div>
  );
}