<?php
require_once '../config.php';

header('Content-Type: application/json');

function validateApiKey($api_key) {
    global $pdo;
    
    if (empty($api_key)) return false;
    
    $stmt = $pdo->prepare("SELECT id, username FROM users WHERE api_key = ?");
    $stmt->execute([$api_key]);
    return $stmt->fetch(PDO::FETCH_ASSOC);
}

$api_key = $_GET['api_key'] ?? '';
$user = validateApiKey($api_key);

if (!$user) {
    http_response_code(401);
    echo json_encode([
        'success' => false,
        'error' => '无效的API密钥'
    ]);
    exit;
}

$page = max(1, intval($_GET['page'] ?? 1));
$limit = min(50, max(1, intval($_GET['limit'] ?? 20)));
$offset = ($page - 1) * $limit;

try {
    $stmt = $pdo->prepare("
        SELECT i.*, 
               GROUP_CONCAT(DISTINCT t.name) as tag_names,
               (SELECT COUNT(*) FROM image_feedbacks WHERE image_id = i.id AND type = 'like') as like_count,
               (SELECT COUNT(*) FROM image_feedbacks WHERE image_id = i.id AND type = 'report') as report_count
        FROM images i 
        LEFT JOIN image_tags it ON i.id = it.image_id 
        LEFT JOIN tags t ON it.tag_id = t.id 
        WHERE i.user_id = ? 
        GROUP BY i.id 
        ORDER BY i.uploaded_at DESC 
        LIMIT ? OFFSET ?
    ");
    $stmt->bindValue(1, $user['id'], PDO::PARAM_INT);
    $stmt->bindValue(2, $limit, PDO::PARAM_INT);
    $stmt->bindValue(3, $offset, PDO::PARAM_INT);
    $stmt->execute();
    
    $images = $stmt->fetchAll(PDO::FETCH_ASSOC);

    $stmt = $pdo->prepare("SELECT COUNT(*) as total FROM images WHERE user_id = ?");
    $stmt->execute([$user['id']]);
    $total = $stmt->fetch(PDO::FETCH_ASSOC)['total'];

    $processedImages = [];
    foreach ($images as $image) {
        $tagNames = [];
        if ($image['tag_names']) {
            $tagNames = explode(',', $image['tag_names']);
        }

        $processedImages[] = [
            'id' => $image['id'],
            'title' => $image['title'],
            'filename' => $image['filename'],
            'url' => SITE_URL . '/view-image.php?id=' . $image['id'],
            'direct_url' => SITE_URL . '/uploads/' . $image['filename'],
            'is_public' => (bool)$image['is_public'],
            'file_size' => $image['file_size'],
            'file_size_formatted' => formatFileSize($image['file_size']),
            'views' => $image['views'],
            'like_count' => $image['like_count'],
            'report_count' => $image['report_count'],
            'tags' => $tagNames,
            'uploaded_at' => $image['uploaded_at'],
            'uploaded_at_formatted' => date('Y-m-d H:i', strtotime($image['uploaded_at']))
        ];
    }

    echo json_encode([
        'success' => true,
        'data' => $processedImages,
        'pagination' => [
            'page' => $page,
            'limit' => $limit,
            'total' => $total,
            'pages' => ceil($total / $limit),
            'has_next' => $page < ceil($total / $limit),
            'has_prev' => $page > 1
        ]
    ]);

} catch(PDOException $e) {
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => '数据库错误: ' . $e->getMessage()]);
}
?>