<?php
/**
 * 日志查看API
 */

// 设置错误报告
error_reporting(E_ALL);
ini_set('display_errors', 0);

// 设置JSON响应头
header('Content-Type: application/json; charset=utf-8');

// 包含必要的类
require_once '../../utils/Config.php';
require_once '../../utils/Logger.php';
require_once '../../utils/Helper.php';
require_once '../../utils/Database.php';

// 处理请求
try {
    // 获取请求方法
    $method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
    
    // 连接数据库
    $db = Database::getInstance();
    
    // 根据请求方法处理
    switch ($method) {
        case 'GET':
            // 获取日志列表
            getLogs($db);
            break;
        case 'DELETE':
            // 删除日志（可选功能）
            deleteLogs($db);
            break;
        default:
            echo json_encode([
                'success' => false,
                'message' => '不支持的请求方法'
            ]);
            break;
    }
} catch (Exception $e) {
    echo json_encode([
        'success' => false,
        'message' => '服务器内部错误: ' . $e->getMessage()
    ]);
}

/**
 * 获取日志列表
 * @param Database $db 数据库实例
 */
function getLogs($db) {
    // 获取请求参数
    $page = isset($_GET['page']) ? (int)$_GET['page'] : 1;
    $perPage = 10;
    $offset = ($page - 1) * $perPage;
    
    // 过滤条件
    $search = isset($_GET['search']) ? $_GET['search'] : '';
    $type = isset($_GET['type']) ? $_GET['type'] : '';
    $startDate = isset($_GET['startDate']) ? $_GET['startDate'] : '';
    $endDate = isset($_GET['endDate']) ? $_GET['endDate'] : '';
    
    // 构建查询条件
    $where = '';
    $params = [];
    $conditions = [];
    
    if (!empty($search)) {
        $conditions[] = "message LIKE ?";
        $params[] = "%$search%";
    }
    
    if (!empty($type)) {
        $conditions[] = "type = ?";
        $params[] = $type;
    }
    
    if (!empty($startDate)) {
        $conditions[] = "created_at >= ?";
        $params[] = $startDate . " 00:00:00";
    }
    
    if (!empty($endDate)) {
        $conditions[] = "created_at <= ?";
        $params[] = $endDate . " 23:59:59";
    }
    
    if (!empty($conditions)) {
        $where = "WHERE " . implode(" AND ", $conditions);
    }
    
    // 查询日志总数
    $totalSql = "SELECT COUNT(*) as total FROM logs $where";
    $totalResult = $db->fetchOne($totalSql, $params);
    $total = $totalResult['total'];
    
    // 查询日志列表
    $logsSql = "SELECT * FROM logs $where ORDER BY created_at DESC LIMIT ? OFFSET ?";
    $logsParams = array_merge($params, [$perPage, $offset]);
    $logs = $db->fetchAll($logsSql, $logsParams);
    
    // 格式化日志数据
    $formattedLogs = [];
    foreach ($logs as $log) {
        $formattedLogs[] = [
            'id' => $log['id'],
            'type' => $log['type'],
            'message' => $log['message'],
            'ip' => $log['ip'],
            'user_id' => $log['user_id'],
            'created_at' => $log['created_at']
        ];
    }
    
    // 返回响应
    echo json_encode([
        'success' => true,
        'data' => [
            'logs' => $formattedLogs,
            'total' => $total,
            'page' => $page,
            'perPage' => $perPage,
            'totalPages' => ceil($total / $perPage)
        ]
    ]);
}

/**
 * 删除日志
 * @param Database $db 数据库实例
 */
function deleteLogs($db) {
    // 获取请求参数
    $id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
    $all = isset($_GET['all']) ? $_GET['all'] : false;
    
    if ($id <= 0 && !$all) {
        echo json_encode([
            'success' => false,
            'message' => '无效的日志ID'
        ]);
        return;
    }
    
    if ($all) {
        // 删除所有日志
        $db->execute("DELETE FROM logs");
        echo json_encode([
            'success' => true,
            'message' => '所有日志已删除'
        ]);
    } else {
        // 删除指定日志
        $db->delete("DELETE FROM logs WHERE id = ?", [$id]);
        echo json_encode([
            'success' => true,
            'message' => '日志删除成功'
        ]);
    }
}