import { sql } from '@/lib/db'
export const dynamic = "force-dynamic"
import { notFound } from 'next/navigation'
import Link from 'next/link'
import Image from 'next/image'

async function getCategory(slug: string) {
  try {
    const { rows } = await sql`
      SELECT * FROM categories WHERE slug = ${slug}
    `
    return rows[0] || null
  } catch (error) {
    return null
  }
}

async function getArticlesByCategory(categorySlug: string) {
  try {
    const { rows } = await sql`
      SELECT a.*, c.name_burmese as category_name_burmese, c.slug as category_slug,
             array_agg(DISTINCT t.name_burmese) FILTER (WHERE t.name_burmese IS NOT NULL) as tags_burmese,
             array_agg(DISTINCT t.slug) FILTER (WHERE t.slug IS NOT NULL) as tag_slugs
      FROM articles a
      JOIN categories c ON a.category_id = c.id
      LEFT JOIN article_tags at ON a.id = at.article_id
      LEFT JOIN tags t ON at.tag_id = t.id
      WHERE c.slug = ${categorySlug} AND a.status = 'published'
      GROUP BY a.id, c.name_burmese, c.slug
      ORDER BY a.published_at DESC
      LIMIT 100
    `
    return rows
  } catch (error) {
    console.error('Error fetching articles by category:', error)
    return []
  }
}

export default async function CategoryPage({ params }: { params: { slug: string } }) {
  const [category, articles] = await Promise.all([
    getCategory(params.slug),
    getArticlesByCategory(params.slug)
  ])
  
  if (!category) {
    notFound()
  }

  // Get category emoji based on slug
  const getCategoryEmoji = (slug: string) => {
    const emojiMap: { [key: string]: string } = {
      'ai-news': '📰',
      'tutorials': '📚',
      'tips-tricks': '💡',
      'upcoming': '🚀',
    }
    return emojiMap[slug] || '📁'
  }

  return (
    <div className="min-h-screen bg-gray-50">
      {/* Header */}
      <div className="bg-gradient-to-r from-primary to-indigo-600 text-white py-16">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex items-center gap-3 mb-4">
            <span className="text-5xl">{getCategoryEmoji(params.slug)}</span>
            <h1 className="text-5xl font-bold font-burmese">
              {category.name_burmese}
            </h1>
          </div>
          {category.description && (
            <p className="text-xl text-white/90 mb-4">
              {category.description}
            </p>
          )}
          <p className="text-lg text-white/80">
            {articles.length} ဆောင်းပါး
          </p>
        </div>
      </div>

      {/* Articles */}
      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">
        {articles.length === 0 ? (
          <div className="text-center py-20 bg-white rounded-2xl shadow-sm">
            <div className="text-6xl mb-4">{getCategoryEmoji(params.slug)}</div>
            <p className="text-xl text-gray-500 font-burmese">
              ဤအမျိုးအစားအတွက် ဆောင်းပါးမရှိသေးပါ။
            </p>
            <Link 
              href="/"
              className="inline-block mt-6 px-6 py-3 bg-primary text-white rounded-full font-semibold hover:bg-primary-dark transition-all"
            >
              မူလစာမျက်နှာသို့ ပြန်သွားရန်
            </Link>
          </div>
        ) : (
          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
            {articles.map((article: any) => (
              <article key={article.id} className="card card-hover fade-in">
                {/* Cover Image */}
                {article.featured_image && (
                  <Link href={`/article/${article.slug}`} className="block image-zoom">
                    <div className="relative h-56 w-full">
                      <Image
                        src={article.featured_image}
                        alt={article.title_burmese}
                        fill
                        className="object-cover"
                      />
                    </div>
                  </Link>
                )}
                
                <div className="p-6">
                  {/* Category Badge */}
                  <div className="inline-block mb-3 px-3 py-1 bg-primary/10 text-primary rounded-full text-xs font-semibold">
                    {article.category_name_burmese}
                  </div>
                  
                  {/* Title */}
                  <h3 className="text-xl font-bold text-gray-900 mb-3 font-burmese line-clamp-2 hover:text-primary transition-colors">
                    <Link href={`/article/${article.slug}`}>
                      {article.title_burmese}
                    </Link>
                  </h3>
                  
                  {/* Excerpt */}
                  <p className="text-gray-600 mb-4 font-burmese line-clamp-3 text-sm leading-relaxed">
                    {article.excerpt_burmese}
                  </p>
                  
                  {/* Tags */}
                  {article.tags_burmese && article.tags_burmese.length > 0 && (
                    <div className="flex flex-wrap gap-2 mb-4">
                      {article.tags_burmese.slice(0, 3).map((tag: string, idx: number) => (
                        <Link
                          key={idx}
                          href={`/tag/${article.tag_slugs[idx]}`}
                          className="text-xs px-2 py-1 bg-gray-100 text-gray-700 rounded hover:bg-gray-200 transition-colors"
                        >
                          #{tag}
                        </Link>
                      ))}
                    </div>
                  )}
                  
                  {/* Meta */}
                  <div className="flex items-center justify-between text-sm text-gray-500 pt-4 border-t border-gray-100">
                    <span className="font-burmese">{article.reading_time} မိနစ်</span>
                    <span>{article.view_count} views</span>
                  </div>
                </div>
              </article>
            ))}
          </div>
        )}
      </div>
    </div>
  )
}

export async function generateMetadata({ params }: { params: { slug: string } }) {
  const category = await getCategory(params.slug)
  
  if (!category) {
    return {
      title: 'Category Not Found',
    }
  }
  
  return {
    title: `${category.name_burmese} - Burmddit`,
    description: category.description || `${category.name_burmese} အမျိုးအစား၏ ဆောင်းပါးများ`,
  }
}