<?php

namespace App\Models;

class TvEpisode extends Model
{
    protected string $table = 'tv_episodes';
    protected array $fillable = [
        'title',
        'overview',
        'season_number',
        'episode_number',
        'air_date',
        'runtime_minutes',
        'rating',
        'imdb_id',
        'tmdb_id',
        'tvdb_id',
        'poster_url',
        'backdrop_url',
        'is_watched',
        'is_favorite',
        'metadata',
        'tv_show_id',
        'source_id'
    ];

    protected array $casts = [
        'season_number' => 'int',
        'episode_number' => 'int',
        'runtime_minutes' => 'int',
        'rating' => 'float',
        'is_watched' => 'bool',
        'is_favorite' => 'bool',
        'air_date' => 'date',
        'metadata' => 'array'
    ];

    /**
     * Get all actors associated with this TV episode
     */
    public function actors()
    {
        $stmt = $this->pdo->prepare("
            SELECT a.*
            FROM actors a
            JOIN actor_tv_episode ate ON a.id = ate.actor_id
            WHERE ate.tv_episode_id = :tv_episode_id
            ORDER BY a.name ASC
        ");
        $stmt->execute(['tv_episode_id' => $this->id]);
        return $stmt->fetchAll(\PDO::FETCH_ASSOC);
    }

    /**
     * Get the TV show this episode belongs to
     */
    public function tvShow()
    {
        $stmt = $this->pdo->prepare("
            SELECT * FROM tv_shows WHERE id = :tv_show_id
        ");
        $stmt->execute(['tv_show_id' => $this->tv_show_id]);
        $showData = $stmt->fetch(\PDO::FETCH_ASSOC);

        return $showData ? new TvShow($this->pdo, $showData) : null;
    }

    /**
     * Get TV episode statistics
     */
    public static function getStats(\PDO $pdo): array
    {
        $stmt = $pdo->query("
            SELECT
                COUNT(*) as total_episodes,
                COUNT(CASE WHEN is_watched = 1 THEN 1 END) as watched_episodes,
                COUNT(CASE WHEN is_favorite = 1 THEN 1 END) as favorite_episodes,
                AVG(rating) as avg_rating
            FROM tv_episodes
        ");
        return $stmt->fetch(\PDO::FETCH_ASSOC);
    }

    /**
     * Get total count with optional search
     */
    public static function getTotalCount(\PDO $pdo, string $search = ''): int
    {
        $sql = "SELECT COUNT(*) as count FROM tv_episodes te JOIN tv_shows ts ON te.tv_show_id = ts.id JOIN sources s ON te.source_id = s.id";
        $params = [];

        if (!empty($search)) {
            $sql .= " WHERE te.title LIKE :search OR ts.title LIKE :search";
            $params['search'] = "%{$search}%";
        }

        $stmt = $pdo->prepare($sql);
        $stmt->execute($params);
        return (int) $stmt->fetch()['count'];
    }

    /**
     * Get all TV episodes with pagination and optional search
     */
    public static function getAllWithPagination(\PDO $pdo, int $page, int $perPage, string $search = ''): array
    {
        $offset = ($page - 1) * $perPage;

        $sql = "
            SELECT te.*, ts.title as show_title, s.display_name as source_name
            FROM tv_episodes te
            JOIN tv_shows ts ON te.tv_show_id = ts.id
            JOIN sources s ON te.source_id = s.id
        ";
        $params = [];

        if (!empty($search)) {
            $sql .= " WHERE te.title LIKE :search OR ts.title LIKE :search";
            $params['search'] = "%{$search}%";
        }

        $sql .= " ORDER BY ts.title ASC, te.season_number ASC, te.episode_number ASC LIMIT :limit OFFSET :offset";

        $stmt = $pdo->prepare($sql);
        $stmt->bindValue(':limit', $perPage, \PDO::PARAM_INT);
        $stmt->bindValue(':offset', $offset, \PDO::PARAM_INT);

        foreach ($params as $key => $value) {
            $stmt->bindValue(":{$key}", $value);
        }

        $stmt->execute();
        return $stmt->fetchAll(\PDO::FETCH_ASSOC);
    }

    /**
     * Toggle watched status
     */
    public function toggleWatched(): bool
    {
        return $this->update($this->id, [
            'is_watched' => !$this->is_watched
        ]);
    }

    /**
     * Toggle favorite status
     */
    public function toggleFavorite(): bool
    {
        return $this->update($this->id, [
            'is_favorite' => !$this->is_favorite
        ]);
    }

    /**
     * Update rating
     */
    public function updateRating(float $rating): bool
    {
        return $this->update($this->id, [
            'rating' => min(10.0, max(0.0, $rating))
        ]);
    }

    /**
     * Get the source relationship
     */
    public function source(): ?Source
    {
        $stmt = $this->pdo->prepare("SELECT * FROM sources WHERE id = :source_id");
        $stmt->execute(['source_id' => $this->source_id]);
        $sourceData = $stmt->fetch(\PDO::FETCH_ASSOC);

        return $sourceData ? new Source($this->pdo, $sourceData) : null;
    }
}