<?php

namespace App\Http\Controllers\User;

use App\Http\Controllers\Controller;
use App\Models\Artwork;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

class TodayInHistoryController extends Controller
{
    public function index(Request $request)
    {
        $perPage   = 36;
        $artworks  = null;
        $today     = now();

        // ── Strategy 1: legacy featured_works table (historical data from old site) ─
        $hasFeaturedWorks = false;
        try { $hasFeaturedWorks = Schema::hasTable('featured_works'); } catch (\Throwable) {}

        if ($hasFeaturedWorks) {
            try {
                $artworks = DB::table('featured_works as f')
                    ->join('artworks as a', 'f.artwork_id', '=', 'a.id')
                    ->where('a.is_approved', true)
                    ->where('a.is_public', true)
                    ->whereNull('a.deleted_at')
                    ->whereRaw('MONTH(f.post_date) = ?', [$today->month])
                    ->whereRaw('DAY(f.post_date) = ?',   [$today->day])
                    ->select('a.id', 'a.title as name', 'a.slug', 'a.hash', 'a.thumb_ext',
                             DB::raw('f.post_date as featured_date'))
                    ->orderBy('f.post_date', 'desc')
                    ->paginate($perPage);
            } catch (\Throwable $e) {
                $artworks = null;
            }
        }

        // ── Strategy 2: new artwork_features table ───────────────────────────────
        if (!$artworks || $artworks->total() === 0) {
            try {
                $artworks = DB::table('artwork_features as f')
                    ->join('artworks as a', 'f.artwork_id', '=', 'a.id')
                    ->where('f.is_active', true)
                    ->where('a.is_approved', true)
                    ->where('a.is_public', true)
                    ->whereNull('a.deleted_at')
                    ->whereNotNull('a.published_at')
                    ->whereRaw('MONTH(f.featured_at) = ?', [$today->month])
                    ->whereRaw('DAY(f.featured_at) = ?',   [$today->day])
                    ->select('a.id', 'a.title as name', 'a.slug', 'a.hash', 'a.thumb_ext',
                             DB::raw('f.featured_at as featured_date'))
                    ->orderBy('f.featured_at', 'desc')
                    ->paginate($perPage);
            } catch (\Throwable $e) {
                $artworks = null;
            }
        }

        // ── Enrich with CDN thumbnails (batch load to avoid N+1) ─────────────────
        if ($artworks && method_exists($artworks, 'getCollection') && $artworks->count() > 0) {
            $ids        = $artworks->getCollection()->pluck('id')->all();
            $modelsById = Artwork::whereIn('id', $ids)->get()->keyBy('id');

            $artworks->getCollection()->transform(function ($row) use ($modelsById) {
                /** @var ?Artwork $art */
                $art = $modelsById->get($row->id);
                if ($art) {
                    $row->thumb_url = $art->thumbUrl('md') ?? 'https://files.skinbase.org/default/missing_md.webp';
                    $row->art_url   = '/art/' . $art->id . '/' . $art->slug;
                    $row->name      = $art->title ?: ($row->name ?? 'Untitled');
                } else {
                    $row->thumb_url = 'https://files.skinbase.org/default/missing_md.webp';
                    $row->art_url   = '/art/' . $row->id;
                    $row->name      = $row->name ?? 'Untitled';
                }
                return $row;
            });
        }

        return view('legacy::today-in-history', [
            'artworks'   => $artworks,
            'page_title' => 'Popular on this day in history',
            'todayLabel' => $today->format('F j'),
        ]);
    }
}