<?php

namespace App\Controllers;

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Views\Twig;

class MusicController extends Controller
{
    private \PDO $pdo;

    public function __construct(\PDO $pdo, Twig $view)
    {
        parent::__construct($view);
        $this->pdo = $pdo;
    }

    public function index(Request $request, Response $response, $args)
    {
        $queryParams = $request->getQueryParams();

        // Get pagination parameters
        $page = max(1, (int)($queryParams['page'] ?? 1));
        $perPage = max(12, min(100, (int)($queryParams['per_page'] ?? 24)));

        // Get search parameters
        $search = trim($queryParams['search'] ?? '');

        // Get filter parameters
        $genres = $queryParams['genres'] ?? [];
        if (!is_array($genres)) {
            $genres = [$genres];
        }
        $genres = array_filter($genres);

        $artists = $queryParams['artists'] ?? [];
        if (!is_array($artists)) {
            $artists = [$artists];
        }
        $artists = array_filter($artists);

        // Get view mode
        $viewMode = $queryParams['view'] ?? 'grid'; // grid, list, covers

        // Get sort parameter
        $sort = $queryParams['sort'] ?? 'title_asc';

        // Get albums with pagination, filters, and sorting
        $albums = \App\Models\MusicAlbum::getAllWithPagination($this->pdo, $page, $perPage, $search, $genres, $artists, $sort);

        // Get total count for pagination
        $totalCount = \App\Models\MusicAlbum::getTotalCount($this->pdo, $search, $genres, $artists);

        // Get available filter options
        $availableGenres = \App\Models\MusicAlbum::getAvailableGenres($this->pdo);
        $availableArtists = \App\Models\MusicAlbum::getAvailableArtists($this->pdo);

        // Calculate pagination info
        $totalPages = ceil($totalCount / $perPage);
        $hasNextPage = $page < $totalPages;
        $hasPrevPage = $page > 1;

        return $this->view->render($response, 'music/index.twig', [
            'title' => 'Music',
            'albums' => $albums,
            'pagination' => [
                'current_page' => $page,
                'per_page' => $perPage,
                'total_pages' => $totalPages,
                'total_items' => $totalCount,
                'has_next' => $hasNextPage,
                'has_prev' => $hasPrevPage,
                'next_page' => $page + 1,
                'prev_page' => $page - 1
            ],
            'search' => $search,
            'view_mode' => $viewMode,
            'view_modes' => ['grid', 'list', 'covers'],
            'filters' => [
                'genres' => $genres,
                'artists' => $artists
            ],
            'available_filters' => [
                'genres' => $availableGenres,
                'artists' => $availableArtists
            ],
            'sort' => $sort,
            'sort_options' => [
                'title_asc' => 'Title (A-Z)',
                'title_desc' => 'Title (Z-A)',
                'artist_asc' => 'Artist (A-Z)',
                'artist_desc' => 'Artist (Z-A)',
                'release_desc' => 'Release Date (Newest First)',
                'release_asc' => 'Release Date (Oldest First)',
                'added_desc' => 'Recently Added',
                'added_asc' => 'Oldest Added'
            ]
        ]);
    }

    public function show(Request $request, Response $response, $args)
    {
        $albumId = (int) $args['id'];

        // Get album details
        $stmt = $this->pdo->prepare("
            SELECT ma.*, s.display_name as source_name
            FROM music_albums ma
            JOIN sources s ON ma.source_id = s.id
            WHERE ma.id = :id
        ");
        $stmt->execute(['id' => $albumId]);
        $album = $stmt->fetch(\PDO::FETCH_ASSOC);

        if (!$album) {
            return $response->withStatus(404);
        }

        // Decode metadata for display
        $metadata = json_decode($album['metadata'], true);

        // Get tracks for this album
        $stmt = $this->pdo->prepare("
            SELECT mt.*
            FROM music_tracks mt
            WHERE mt.album_id = :album_id
            ORDER BY mt.track_number ASC, mt.title ASC
        ");
        $stmt->execute(['album_id' => $albumId]);
        $tracks = $stmt->fetchAll(\PDO::FETCH_ASSOC);

        // Get artist information
        $artist = null;
        if ($album['artist_id']) {
            $stmt = $this->pdo->prepare("
                SELECT ma.*, s.display_name as source_name
                FROM music_artists ma
                JOIN sources s ON ma.source_id = s.id
                WHERE ma.id = :artist_id
            ");
            $stmt->execute(['artist_id' => $album['artist_id']]);
            $artist = $stmt->fetch(\PDO::FETCH_ASSOC);
        }

        return $this->view->render($response, 'music/show.twig', [
            'title' => $album['title'],
            'album' => $album,
            'tracks' => $tracks,
            'artist' => $artist,
            'metadata' => $metadata
        ]);
    }
}