<?php

require_once __DIR__ . '/BaseModel.php';

class Media extends BaseModel {
    protected $table = 'media';
    
    public function getBase($id) {
        return $this->findById($id);
    }

    public function getWithRelations($id) {
        $media = $this->findById($id);
        if (!$media) {
            return null;
        }

        $media['genres'] = $this->getRelatedItems('genres', $id);
        $media['tags'] = $this->getRelatedItems('tags', $id);
        $media['studios'] = $this->getRelatedItems('studios', $id);
        $media['staff'] = $this->getCastForMedia($id);

        return $media;
    }
    
    public function search($filters = [], $page = 1, $limit = 20) {
        $conditions = [];
        
        if (isset($filters['category'])) {
            $conditions['category'] = $filters['category'];
        }
        if (isset($filters['type'])) {
            $conditions['type'] = $filters['type'];
        }
        if (isset($filters['search'])) {
            $searchTerm = "%" . $filters['search'] . "%";
            $conditions['title'] = [$searchTerm];
            // OR Bedingung für description wird separat behandelt
        }
        
        $offset = ($page - 1) * $limit;
        
        if (isset($filters['search'])) {
            // Komplexe Suche mit OR
            $query = "SELECT * FROM {$this->table} WHERE 1=1";
            $params = [];
            
            if (isset($filters['category'])) {
                $query .= " AND category = ?";
                $params[] = $filters['category'];
            }
            if (isset($filters['type'])) {
                $query .= " AND type = ?";
                $params[] = $filters['type'];
            }
            
            $query .= " AND (title LIKE ? OR description LIKE ?)";
            $searchTerm = "%" . $filters['search'] . "%";
            $params[] = $searchTerm;
            $params[] = $searchTerm;
            
            $query .= " ORDER BY createdAt DESC LIMIT " . (int)$limit . " OFFSET " . (int)$offset;
            
            $stmt = $this->pdo->prepare($query);
            $stmt->execute($params);
            $items = $stmt->fetchAll();

            // Count Query
            $countQuery = "SELECT COUNT(*) FROM {$this->table} WHERE 1=1";
            $countParams = [];
            
            if (isset($filters['category'])) {
                $countQuery .= " AND category = ?";
                $countParams[] = $filters['category'];
            }
            if (isset($filters['type'])) {
                $countQuery .= " AND type = ?";
                $countParams[] = $filters['type'];
            }
            
            $countQuery .= " AND (title LIKE ? OR description LIKE ?)";
            $countParams[] = $searchTerm;
            $countParams[] = $searchTerm;
            
            $countStmt = $this->pdo->prepare($countQuery);
            $countStmt->execute($countParams);
            $total = $countStmt->fetchColumn();
        } else {
            $items = $this->findAll($conditions, 'createdAt DESC', $limit, $offset);
            $total = $this->count($conditions);
        }
        
        return [
            'items' => $items,
            'total' => $total,
            'page' => $page,
            'limit' => $limit,
            'totalPages' => ceil($total / $limit)
        ];
    }
    
    public function createWithRelations($data) {
        $title = $data['title'] ?? null;
        if (!$title) {
            throw new Exception('Title is required');
        }
        
        // cleanname generieren
        $cleanname = generateCleanName($title);
        
        // Basis-Media-Daten extrahieren
        $mediaData = [
            'title' => $title,
            'cleanname' => $cleanname,
            'year' => $data['year'] ?? null,
            'poster' => $data['poster'] ?? null,
            'banner' => $data['banner'] ?? null,
            'description' => $data['description'] ?? null,
            'rating' => $data['rating'] ?? null,
            'category' => $data['category'] ?? null,
            'type' => $data['type'] ?? null,
            'status' => $data['status'] ?? null,
            'aspectRatio' => $data['aspectRatio'] ?? null,
            'runtime' => $data['runtime'] ?? null,
            'director' => $data['director'] ?? null,
            'writer' => $data['writer'] ?? null,
            'source' => $data['source'] ?? null,
            'releaseDate' => $data['releaseDate'] ?? null
        ];
        
        $mediaId = $this->create($mediaData);
        
        // Relationen speichern
        if (isset($data['genres']) && is_array($data['genres'])) {
            $this->saveRelatedItems('genres', $mediaId, $data['genres']);
        }
        if (isset($data['tags']) && is_array($data['tags'])) {
            $this->saveRelatedItems('tags', $mediaId, $data['tags']);
        }
        if (isset($data['studios']) && is_array($data['studios'])) {
            $this->saveRelatedItems('studios', $mediaId, $data['studios']);
        }
        if (isset($data['staff']) && is_array($data['staff'])) {
            $this->saveCastAssignments($mediaId, $data['staff']);
        }
        
        return $mediaId;
    }
    
    public function updateWithRelations($id, $data) {
        $mediaData = [];
        
        foreach (['title', 'year', 'poster', 'banner', 'description', 'rating', 'category', 'type', 'status', 'aspectRatio', 'runtime', 'director', 'writer', 'releaseDate', 'source'] as $field) {
            if (array_key_exists($field, $data)) {
                $mediaData[$field] = $data[$field];
            }
        }
        
        // Wenn title geändert wurde, cleanname aktualisieren
        if (isset($data['title'])) {
            $mediaData['cleanname'] = generateCleanName($data['title']);
        }
        
        if (!empty($mediaData)) {
            $this->update($id, $mediaData);
        }
        
        // Relationen aktualisieren
        if (isset($data['genres']) && is_array($data['genres'])) {
            $this->pdo->prepare("DELETE FROM genres WHERE media_id = ?")->execute([$id]);
            $this->saveRelatedItems('genres', $id, $data['genres']);
        }
        if (isset($data['tags']) && is_array($data['tags'])) {
            $this->pdo->prepare("DELETE FROM tags WHERE media_id = ?")->execute([$id]);
            $this->saveRelatedItems('tags', $id, $data['tags']);
        }
        if (isset($data['studios']) && is_array($data['studios'])) {
            $this->pdo->prepare("DELETE FROM studios WHERE media_id = ?")->execute([$id]);
            $this->saveRelatedItems('studios', $id, $data['studios']);
        }
        if (isset($data['staff']) && is_array($data['staff'])) {
            $this->pdo->prepare("DELETE FROM media_cast WHERE media_id = ?")->execute([$id]);
            $this->saveCastAssignments($id, $data['staff']);
        }
        
        return true;
    }
    
    public function findByCleanName($cleanname) {
        $stmt = $this->pdo->prepare("SELECT * FROM {$this->table} WHERE cleanname = ?");
        $stmt->execute([$cleanname]);
        return $stmt->fetch();
    }
    
    protected function saveRelatedItems($table, $id, $items, $fkColumn = 'media_id') {
        $valueColumn = $table === 'genres' ? 'genre' : ($table === 'tags' ? 'tag' : ($table === 'occupations' ? 'occupation' : 'studio'));
        $stmt = $this->pdo->prepare("INSERT INTO $table ($fkColumn, $valueColumn) VALUES (?, ?)");
        foreach ($items as $item) {
            $stmt->execute([$id, $item]);
        }
    }
    
    protected function getCastForMedia($mediaId) {
        $stmt = $this->pdo->prepare("
            SELECT cs.*, mc.role, mc.characterName, mc.characterImage
            FROM cast_staff cs
            INNER JOIN media_cast mc ON cs.id = mc.cast_id
            WHERE mc.media_id = ?
        ");
        $stmt->execute([$mediaId]);
        $cast = $stmt->fetchAll();
        foreach ($cast as &$member) {
            $member['occupations'] = $this->getRelatedItems('occupations', $member['id'], 'cast_id');
        }
        return $cast;
    }
    
    protected function getRelatedItems($table, $id, $fkColumn = 'media_id') {
        $stmt = $this->pdo->prepare("SELECT * FROM $table WHERE $fkColumn = ?");
        $stmt->execute([$id]);
        $items = $stmt->fetchAll();
        $result = [];
        foreach ($items as $item) {
            if ($fkColumn === 'cast_id') {
                $result[] = $item['occupation'];
            } else {
                $result[] = $table === 'genres' ? $item['genre'] : ($table === 'tags' ? $item['tag'] : $item['studio']);
            }
        }
        return $result;
    }
    
    protected function saveCastAssignments($mediaId, $castData) {
        foreach ($castData as $member) {
            $castId = null;
            if (isset($member['id']) && $member['id']) {
                $castId = $member['id'];
            } elseif (isset($member['name'])) {
                $stmt = $this->pdo->prepare("SELECT id FROM cast_staff WHERE name = ? LIMIT 1");
                $stmt->execute([$member['name']]);
                $existing = $stmt->fetch();
                if ($existing) {
                    $castId = $existing['id'];
                } else {
                    $cleanname = generateCleanName($member['name']);
                    $stmt = $this->pdo->prepare("
                        INSERT INTO cast_staff (name, cleanname, photo, bio, birthDate, birthPlace)
                        VALUES (?, ?, ?, ?, ?, ?)
                    ");
                    $stmt->execute([
                        $member['name'] ?? null,
                        $cleanname,
                        $member['photo'] ?? null,
                        $member['bio'] ?? null,
                        $member['birthDate'] ?? null,
                        $member['birthPlace'] ?? null
                    ]);
                    $castId = $this->pdo->lastInsertId();
                    
                    if (isset($member['occupations']) && is_array($member['occupations'])) {
                        $this->saveRelatedItems('occupations', $castId, $member['occupations'], 'cast_id');
                    }
                }
            }
            
            if ($castId) {
                $stmt = $this->pdo->prepare("
                    INSERT INTO media_cast (media_id, cast_id, role, characterName, characterImage)
                    VALUES (?, ?, ?, ?, ?)
                ");
                $stmt->execute([
                    $mediaId,
                    $castId,
                    $member['role'] ?? null,
                    $member['characterName'] ?? null,
                    $member['characterImage'] ?? null
                ]);
            }
        }
    }
}