<?php

declare(strict_types=1);

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Models\Artwork;
use App\Models\ContentType;
use Illuminate\Http\Response;
use Illuminate\View\View;

/**
 * RssFeedController
 *
 * GET /rss-feeds                → info page listing all available feeds
 * GET /rss/latest-uploads.xml  → all published artworks (legacy)
 * GET /rss/latest-skins.xml    → skins only (legacy)
 * GET /rss/latest-wallpapers.xml → wallpapers only (legacy)
 * GET /rss/latest-photos.xml   → photography only (legacy)
 *
 * Nova feeds live in App\Http\Controllers\RSS\*.
 */
final class RssFeedController extends Controller
{
    /** Number of items per legacy feed. */
    private const FEED_LIMIT = 25;

    /**
     * Grouped feed definitions shown on the /rss-feeds info page.
     * Each group has a 'label' and an array of 'feeds' with title + url.
     */
    public const FEED_GROUPS = [
        'global' => [
            'label' => 'Global',
            'feeds' => [
                ['title' => 'Latest Artworks',  'url' => '/rss',                  'description' => 'All new artworks across the platform.'],
            ],
        ],
        'discover' => [
            'label' => 'Discover',
            'feeds' => [
                ['title' => 'Fresh Uploads',    'url' => '/rss/discover/fresh',    'description' => 'The newest artworks just published.'],
                ['title' => 'Trending',         'url' => '/rss/discover/trending', 'description' => 'Most-viewed artworks over the past 7 days.'],
                ['title' => 'Rising',           'url' => '/rss/discover/rising',   'description' => 'Artworks gaining momentum right now.'],
            ],
        ],
        'explore' => [
            'label' => 'Explore',
            'feeds' => [
                ['title' => 'All Artworks',     'url' => '/rss/explore/artworks',         'description' => 'Latest artworks of all types.'],
                ['title' => 'Wallpapers',       'url' => '/rss/explore/wallpapers',       'description' => 'Latest wallpapers.'],
                ['title' => 'Skins',            'url' => '/rss/explore/skins',            'description' => 'Latest skins.'],
                ['title' => 'Photography',      'url' => '/rss/explore/photography',      'description' => 'Latest photography.'],
                ['title' => 'Trending Wallpapers', 'url' => '/rss/explore/wallpapers/trending', 'description' => 'Trending wallpapers this week.'],
            ],
        ],
        'blog' => [
            'label' => 'Blog',
            'feeds' => [
                ['title' => 'Blog Posts',       'url' => '/rss/blog',             'description' => 'Latest posts from the Skinbase blog.'],
            ],
        ],
        'legacy' => [
            'label' => 'Legacy Feeds',
            'feeds' => [
                ['title' => 'Latest Uploads (XML)',    'url' => '/rss/latest-uploads.xml',    'description' => 'Legacy XML feed.'],
                ['title' => 'Latest Skins (XML)',      'url' => '/rss/latest-skins.xml',      'description' => 'Legacy XML feed.'],
                ['title' => 'Latest Wallpapers (XML)', 'url' => '/rss/latest-wallpapers.xml', 'description' => 'Legacy XML feed.'],
                ['title' => 'Latest Photos (XML)',     'url' => '/rss/latest-photos.xml',     'description' => 'Legacy XML feed.'],
            ],
        ],
    ];

    /** Flat feed list kept for backward-compatibility (old view logic). */
    public const FEEDS = [
        'uploads'    => ['title' => 'Latest Uploads',    'url' => '/rss/latest-uploads.xml'],
        'skins'      => ['title' => 'Latest Skins',       'url' => '/rss/latest-skins.xml'],
        'wallpapers' => ['title' => 'Latest Wallpapers',  'url' => '/rss/latest-wallpapers.xml'],
        'photos'     => ['title' => 'Latest Photos',      'url' => '/rss/latest-photos.xml'],
    ];

    /** Info page at /rss-feeds */
    public function index(): View
    {
        return view('web.rss-feeds', [
            'page_title'            => 'RSS Feeds — Skinbase',
            'page_meta_description' => 'Subscribe to Skinbase RSS feeds to stay up to date with the latest uploads, skins, wallpapers, and photos.',
            'page_canonical'        => url('/rss-feeds'),
            'hero_title'            => 'RSS Feeds',
            'hero_description'      => 'Subscribe to stay up to date with the latest content on Skinbase.',
            'breadcrumbs'           => collect([
                (object) ['name' => 'Home', 'url' => '/'],
                (object) ['name' => 'RSS Feeds', 'url' => '/rss-feeds'],
            ]),
            'feeds'        => self::FEEDS,
            'feed_groups'  => self::FEED_GROUPS,
            'center_content' => true,
            'center_max'     => '3xl',
        ]);
    }

    /** /rss/latest-uploads.xml — all content types */
    public function latestUploads(): Response
    {
        $artworks = Artwork::published()
            ->with(['user'])
            ->latest('published_at')
            ->limit(self::FEED_LIMIT)
            ->get();

        return $this->buildFeed('Latest Uploads', url('/rss/latest-uploads.xml'), $artworks);
    }

    /** /rss/latest-skins.xml */
    public function latestSkins(): Response
    {
        return $this->feedByContentType('skins', 'Latest Skins', '/rss/latest-skins.xml');
    }

    /** /rss/latest-wallpapers.xml */
    public function latestWallpapers(): Response
    {
        return $this->feedByContentType('wallpapers', 'Latest Wallpapers', '/rss/latest-wallpapers.xml');
    }

    /** /rss/latest-photos.xml */
    public function latestPhotos(): Response
    {
        return $this->feedByContentType('photography', 'Latest Photos', '/rss/latest-photos.xml');
    }

    // -------------------------------------------------------------------------

    private function feedByContentType(string $slug, string $title, string $feedPath): Response
    {
        $contentType = ContentType::where('slug', $slug)->first();

        $query = Artwork::published()->with(['user'])->latest('published_at')->limit(self::FEED_LIMIT);

        if ($contentType) {
            $query->whereHas('categories', fn ($q) => $q->where('content_type_id', $contentType->id));
        }

        return $this->buildFeed($title, url($feedPath), $query->get());
    }

    private function buildFeed(string $channelTitle, string $feedUrl, $artworks): Response
    {
        $content = view('rss.feed', [
            'channelTitle'       => $channelTitle . ' — Skinbase',
            'channelDescription' => 'The latest ' . strtolower($channelTitle) . ' from Skinbase.org',
            'channelLink'        => url('/'),
            'feedUrl'            => $feedUrl,
            'artworks'           => $artworks,
            'buildDate'          => now()->toRfc2822String(),
        ])->render();

        return response($content, 200, [
            'Content-Type' => 'application/rss+xml; charset=utf-8',
        ]);
    }
}