<?php
header('Content-Type: application/json');
require_once __DIR__ . '/../db/config.php';
require_once __DIR__ . '/../includes/pexels.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['success' => false, 'error' => 'Invalid request method']);
    exit;
}

$type = $_POST['type'] ?? 'photo';
$prompt = $_POST['prompt'] ?? '';
$style = $_POST['style'] ?? '';

if (empty($prompt)) {
    echo json_encode(['success' => false, 'error' => 'Запрос не может быть пустым']);
    exit;
}

$width = 1024;
$height = 1024;

$enhanced_prompt = $prompt;
if (!empty($style)) {
    $style_map = [
        'anime' => 'in anime style, high quality, vibrant colors',
        'realism' => 'photorealistic, highly detailed, 8k, masterpiece',
        'cyberpunk' => 'cyberpunk style, neon lights, futuristic, highly detailed',
        '3d-render' => '3d render, soft aesthetic, cinematic lighting, high quality',
        'minimalism' => 'minimalist style, clean lines, simple, elegant',
        'cinematic' => 'cinematic shot, dramatic lighting, movie still'
    ];
    if (isset($style_map[$style])) {
        $enhanced_prompt .= ", " . $style_map[$style];
    }
}

try {
    $result_url = '';
    $is_ai = false;
    $provider_name = '';
    $message = '';
    
    if ($type === 'photo') {
        $is_ai = true;
        $provider_name = 'Pollinations Flux';
        $seed = rand(1000, 99999);
        $encoded_prompt = urlencode($enhanced_prompt);
        $api_url = "https://image.pollinations.ai/prompt/{$encoded_prompt}?width={$width}&height={$height}&seed={$seed}&model=flux&nologo=true";
        
        $filename = 'assets/images/pexels/gen_' . md5($enhanced_prompt . $seed) . '.jpg';
        $target = __DIR__ . '/../' . $filename;
        
        $ch = curl_init($api_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        $image_data = curl_exec($ch);
        $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($http_code === 200 && strpos($content_type, 'image') !== false && $image_data) {
            file_put_contents($target, $image_data);
            $result_url = $filename;
        } else {
            $result_url = $api_url;
        }
    } else {
        // Video always from Pexels
        $is_ai = false;
        $provider_name = 'Pexels Stock';
        $url = 'https://api.pexels.com/videos/search?query=' . urlencode($prompt) . '&per_page=1&page=1';
        $data = pexels_get($url);
        if ($data && !empty($data['videos'])) {
            foreach ($data['videos'][0]['video_files'] as $file) {
                if ($file['quality'] === 'hd' || $file['quality'] === 'sd') {
                    $result_url = $file['link'];
                    break;
                }
            }
        }

        if (empty($result_url)) {
            $result_url = 'https://interactive-examples.mdn.mozilla.net/media/cc0-videos/flower.mp4';
            $message = 'Видео не найдено по вашему запросу. Показываем пример.';
        }
    }

    $history_prompt = $prompt . ($style ? " ($style)" : "");
    $stmt = db()->prepare("INSERT INTO media_history (type, prompt, result_url) VALUES (?, ?, ?)");
    $stmt->execute([$type, $history_prompt, $result_url]);

    echo json_encode([
        'success' => true,
        'type' => $type,
        'url' => $result_url,
        'prompt' => $history_prompt,
        'is_ai' => $is_ai,
        'provider' => $provider_name,
        'message' => $message
    ]);

} catch (Exception $e) {
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}