'use client';

import React, { useMemo, useState } from 'react';
import Link from 'next/link';
import {
  BLOG_CATEGORIES,
  type BlogArticle,
  type BlogCategory,
} from '@/lib/blogDefaults';

function ArticleCard({
  article,
  featured,
}: {
  article: BlogArticle;
  featured?: boolean;
}) {
  return (
    <Link
      href={`/blog/${article.slug}`}
      className={`group block bg-white border border-gray-200 rounded-xl overflow-hidden hover:border-primary/30 hover:shadow-sm transition-all ${
        featured ? '' : ''
      }`}
    >
      <div
        className={`relative bg-gray-100 overflow-hidden ${
          featured ? 'aspect-[16/8] md:aspect-[16/7]' : 'aspect-[16/10]'
        }`}
      >
        {/* eslint-disable-next-line @next/next/no-img-element */}
        <img
          src={article.image}
          alt={article.title}
          className="absolute inset-0 w-full h-full object-cover transition-transform duration-500 group-hover:scale-[1.03]"
        />
        <span className="absolute top-3 left-3 text-[11px] font-bold uppercase tracking-wide bg-white/95 text-primary px-2 py-1 rounded">
          {article.category}
        </span>
      </div>
      <div className={featured ? 'p-5 md:p-6' : 'p-4'}>
        <h2
          className={`font-bold text-[#1E293B] leading-snug group-hover:text-primary transition-colors ${
            featured ? 'text-[20px] md:text-[24px]' : 'text-[15px] line-clamp-2'
          }`}
        >
          {article.title}
        </h2>
        <p
          className={`text-gray-500 mt-2 ${
            featured ? 'text-[14px] line-clamp-3' : 'text-[13px] line-clamp-2'
          }`}
        >
          {article.excerpt}
        </p>
        <p className="text-[12px] text-gray-400 mt-3">
          {article.author} · {article.date} · {article.readTime}
        </p>
      </div>
    </Link>
  );
}

export function BlogListing({ articles }: { articles: BlogArticle[] }) {
  const [category, setCategory] = useState<'All' | BlogCategory>('All');

  const filtered = useMemo(
    () =>
      category === 'All'
        ? articles
        : articles.filter((a) => a.category === category),
    [articles, category]
  );

  const featured = filtered[0];
  const rest = filtered.slice(1);

  return (
    <div>
      <h1 className="text-[28px] md:text-[32px] font-bold text-[#1E293B]">
        News & Blog
      </h1>
      <p className="text-[14px] text-gray-500 mt-2 max-w-2xl">
        Tech news, buying guides, and repair tips from the iFixKart team.
      </p>

      <div className="flex flex-wrap gap-2 mt-6 mb-8">
        {BLOG_CATEGORIES.map((cat) => {
          const active = category === cat;
          return (
            <button
              key={cat}
              type="button"
              onClick={() => setCategory(cat)}
              className={`h-9 px-3.5 rounded-full text-[13px] font-semibold border transition-colors cursor-pointer ${
                active
                  ? 'bg-primary text-white border-primary'
                  : 'bg-white text-gray-600 border-gray-200 hover:border-primary/40 hover:text-primary'
              }`}
            >
              {cat}
            </button>
          );
        })}
      </div>

      {filtered.length === 0 ? (
        <p className="text-[14px] text-gray-500">No articles in this category yet.</p>
      ) : (
        <>
          {featured ? <ArticleCard article={featured} featured /> : null}
          {rest.length > 0 ? (
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-5 mt-5">
              {rest.map((article) => (
                <ArticleCard key={article.slug} article={article} />
              ))}
            </div>
          ) : null}
        </>
      )}
    </div>
  );
}

export function BlogArticleView({
  article,
  related,
}: {
  article: BlogArticle;
  related: BlogArticle[];
}) {
  return (
    <article className="max-w-[820px]">
      <Link
        href="/blog"
        className="text-[13px] font-semibold text-primary hover:underline"
      >
        ← All articles
      </Link>
      <span className="ml-3 text-[11px] font-bold uppercase tracking-wide text-primary">
        {article.category}
      </span>
      <h1 className="text-[26px] md:text-[32px] font-bold text-[#1E293B] leading-tight mt-3">
        {article.title}
      </h1>
      <p className="text-[13px] text-gray-500 mt-3">
        By {article.author} · {article.date} · {article.readTime}
      </p>

      <div className="relative w-full aspect-[16/9] rounded-xl overflow-hidden bg-gray-100 mt-6 mb-8">
        {/* eslint-disable-next-line @next/next/no-img-element */}
        <img
          src={article.image}
          alt={article.title}
          className="absolute inset-0 w-full h-full object-cover"
        />
      </div>

      <div className="space-y-4">
        {article.body.map((para, i) => (
          <p key={i} className="text-[15px] text-gray-600 leading-relaxed">
            {para}
          </p>
        ))}
      </div>

      {related.length > 0 ? (
        <div className="mt-12 pt-8 border-t border-gray-200">
          <h2 className="text-[18px] font-bold text-[#1E293B] mb-4">More stories</h2>
          <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
            {related.map((item) => (
              <ArticleCard key={item.slug} article={item} />
            ))}
          </div>
        </div>
      ) : null}
    </article>
  );
}