<?php

require_once __DIR__ . '/BaseModel.php';
require_once __DIR__ . '/../services/ImageHandler.php';

class Cast extends BaseModel {
    protected $table = 'cast_staff';
    private $imageHandler;
    protected $isUpdate = false;
    protected $castId = null;
    
    public function __construct($pdo) {
        parent::__construct($pdo);
        $this->imageHandler = new ImageHandler();
    }
    
    public function getWithFilmography($id) {
        $cast = $this->findById($id);
        if (!$cast) {
            return null;
        }
        
        $cast['occupations'] = $this->getRelatedItems('occupations', $id, 'cast_id');
        $cast['filmography'] = $this->getMediaForCast($id);
        
        return $cast;
    }
    
    public function getMediaForCast($castId) {
        $stmt = $this->pdo->prepare("
            SELECT m.id, m.title, m.year, m.poster, m.category, m.type, mc.role, mc.characterName
            FROM media m
            INNER JOIN media_cast mc ON m.id = mc.media_id
            WHERE mc.cast_id = ?
            ORDER BY m.year DESC
        ");
        $stmt->execute([$castId]);
        return $stmt->fetchAll();
    }
    
    public function search($filters = [], $page = 1, $limit = 20) {
        $conditions = [];
        
        if (isset($filters['search'])) {
            $conditions['name'] = ["%" . $filters['search'] . "%"];
        }
        
        $offset = ($page - 1) * $limit;
        $items = $this->findAll($conditions, 'createdAt DESC', $limit, $offset);
        $total = $this->count($conditions);

        // Load filmography for all cast members in a single query
        if (!empty($items)) {
            $castIds = array_column($items, 'id');
            $placeholders = str_repeat('?,', count($castIds) - 1) . '?';
            
            $stmt = $this->pdo->prepare("
                SELECT mc.cast_id, m.id, m.title, m.year, m.poster, m.category, m.type, mc.role, mc.characterName
                FROM media m
                INNER JOIN media_cast mc ON m.id = mc.media_id
                WHERE mc.cast_id IN ($placeholders)
                ORDER BY m.year DESC
            ");
            $stmt->execute($castIds);
            $allFilmography = $stmt->fetchAll();
            
            // Group filmography by cast_id
            $filmographyByCast = [];
            foreach ($allFilmography as $film) {
                $castId = $film['cast_id'];
                unset($film['cast_id']);
                $filmographyByCast[$castId][] = $film;
            }
            
            // Attach filmography to each cast member
            foreach ($items as &$item) {
                $item['filmography'] = $filmographyByCast[$item['id']] ?? [];
                $mediaTypes = array_unique(array_column($item['filmography'], 'category'));
                $item['media_types'] = array_values($mediaTypes);
            }
        }

        return [
            'items' => $items,
            'total' => $total,
            'page' => $page,
            'limit' => $limit
        ];
    }
    
    protected function processPhotoField($data) {
        error_log("Cast::processPhotoField - Checking for photo field, isUpdate: " . ($this->isUpdate ? 'yes' : 'no'));
        
        if ($this->isUpdate && $this->castId && isset($data['photo']) && !empty($data['photo'])) {
            $currentCast = $this->findById($this->castId);
            if ($currentCast && !empty($currentCast['photo'])) {
                $oldPhoto = $currentCast['photo'];
                if (strpos($oldPhoto, '/images/') === 0) {
                    error_log("Cast::processPhotoField - Deleting old photo: " . $oldPhoto);
                    $this->imageHandler->deleteImage($oldPhoto);
                }
            }
        }
        
        if (isset($data['photo']) && !empty($data['photo'])) {
            error_log("Cast::processPhotoField - Photo found, length: " . strlen($data['photo']));
            
            if (strpos($data['photo'], '/images/') === 0 || filter_var($data['photo'], FILTER_VALIDATE_URL)) {
                error_log("Cast::processPhotoField - Photo is already a path or URL, skipping processing");
                return $data;
            }
            
            $photoPath = $this->imageHandler->saveBase64Image($data['photo'], 'cast/photo');
            error_log("Cast::processPhotoField - ImageHandler returned: " . ($photoPath ?: 'null'));
            if ($photoPath) {
                $data['photo'] = $photoPath;
                error_log("Cast::processPhotoField - Photo path set to: " . $photoPath);
            } else {
                error_log("Cast::processPhotoField - Failed to process photo, keeping original data");
            }
        } else {
            error_log("Cast::processPhotoField - No photo field found or empty");
        }
        return $data;
    }
    
    public function createWithOccupations($data) {
        $name = $data['name'] ?? null;
        if (!$name) {
            throw new Exception('Name is required');
        }
        
        // cleanname generieren
        $cleanname = generateCleanName($name);
        
        $data = $this->processPhotoField($data);
        
        $castData = [
            'name' => $name,
            'cleanname' => $cleanname,
            'photo' => $data['photo'] ?? null,
            'bio' => $data['bio'] ?? null,
            'birthDate' => $data['birthDate'] ?? null,
            'birthPlace' => $data['birthPlace'] ?? null
        ];
        
        $castId = $this->create($castData);
        
        if (isset($data['occupations']) && is_array($data['occupations'])) {
            $this->saveRelatedItems('occupations', $castId, $data['occupations'], 'cast_id');
        }
        
        return $castId;
    }
    
    public function updateWithOccupations($id, $data) {
        $this->isUpdate = true;
        $this->castId = $id;
        
        $data = $this->processPhotoField($data);
        
        $castData = [];
        
        foreach (['name', 'photo', 'bio', 'birthDate', 'birthPlace'] as $field) {
            if (array_key_exists($field, $data)) {
                $castData[$field] = $data[$field];
            }
        }
        
        // Wenn name geändert wurde, cleanname aktualisieren
        if (isset($data['name'])) {
            $castData['cleanname'] = generateCleanName($data['name']);
        }
        
        if (!empty($castData)) {
            $this->update($id, $castData);
        }
        
        if (isset($data['occupations']) && is_array($data['occupations'])) {
            $this->pdo->prepare("DELETE FROM occupations WHERE cast_id = ?")->execute([$id]);
            $this->saveRelatedItems('occupations', $id, $data['occupations'], 'cast_id');
        }
        
        return true;
    }
    
    public function findByCleanName($cleanname) {
        $stmt = $this->pdo->prepare("SELECT * FROM {$this->table} WHERE cleanname = ?");
        $stmt->execute([$cleanname]);
        return $stmt->fetch();
    }
    
    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) {
            $result[] = $fkColumn === 'cast_id' ? $item['occupation'] : $item['genre'];
        }
        return $result;
    }
    
    protected function saveRelatedItems($table, $id, $items, $fkColumn = 'media_id') {
        $valueColumn = $fkColumn === 'cast_id' ? 'occupation' : 'genre';
        $stmt = $this->pdo->prepare("INSERT INTO $table ($fkColumn, $valueColumn) VALUES (?, ?)");
        foreach ($items as $item) {
            $stmt->execute([$id, $item]);
        }
    }
}