<?php
/**
 * 用户设置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 ($method) {
        case 'GET':
            // 获取用户设置
            getSettings($db);
            break;
        case 'POST':
            // 保存用户设置
            saveSettings($db);
            break;
        case 'PUT':
            // 处理特殊设置更新
            $action = isset($_GET['action']) ? $_GET['action'] : '';
            if ($action === 'password') {
                // 修改密码
                changePassword($db);
            } elseif ($action === 'autoreply') {
                // 设置自动回复
                setAutoReply($db);
            } else {
                echo json_encode([
                    'success' => false,
                    'message' => '不支持的操作类型'
                ]);
            }
            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()
    ]);
}

/**
 * 获取用户设置
 * @param Database $db 数据库实例
 */
function getSettings($db) {
    // 获取请求参数
    $username = isset($_GET['username']) ? $_GET['username'] : '';
    
    // 验证必要参数
    if (empty($username)) {
        echo json_encode([
            'success' => false,
            'message' => '缺少用户名参数'
        ]);
        return;
    }
    
    // 查询用户设置
    $settings = $db->fetchAll("SELECT setting_key, setting_value FROM user_settings WHERE user_id = ?", [$username]);
    
    // 转换为关联数组
    $settingsArray = [];
    foreach ($settings as $setting) {
        $settingsArray[$setting['setting_key']] = $setting['setting_value'];
    }
    
    echo json_encode([
        'success' => true,
        'data' => [
            'settings' => $settingsArray
        ]
    ]);
}

/**
 * 保存用户设置
 * @param Database $db 数据库实例
 */
function saveSettings($db) {
    // 获取请求数据
    $data = json_decode(file_get_contents('php://input'), true);
    
    // 验证请求数据
    if (!$data || empty($data['username']) || empty($data['settings'])) {
        echo json_encode([
            'success' => false,
            'message' => '缺少必要参数'
        ]);
        return;
    }
    
    $username = $data['username'];
    $settings = $data['settings'];
    
    // 开始事务
    $pdo = $db->beginTransaction();
    
    try {
        // 删除现有设置
        $db->execute("DELETE FROM user_settings WHERE user_id = ?", [$username]);
        
        // 插入新设置
        foreach ($settings as $key => $value) {
            $db->insert(
                "INSERT INTO user_settings (user_id, setting_key, setting_value) VALUES (?, ?, ?)",
                [$username, $key, $value]
            );
        }
        
        // 提交事务
        $db->commit($pdo);
        
        echo json_encode([
            'success' => true,
            'message' => '设置保存成功'
        ]);
    } catch (Exception $e) {
        // 回滚事务
        $db->rollback($pdo);
        
        echo json_encode([
            'success' => false,
            'message' => '保存设置失败: ' . $e->getMessage()
        ]);
    }
}

/**
 * 修改密码
 * @param Database $db 数据库实例
 */
function changePassword($db) {
    // 获取请求数据
    $data = json_decode(file_get_contents('php://input'), true);
    
    // 验证请求数据
    if (!$data || empty($data['username']) || empty($data['oldPassword']) || empty($data['newPassword'])) {
        echo json_encode([
            'success' => false,
            'message' => '缺少必要参数'
        ]);
        return;
    }
    
    $username = $data['username'];
    $oldPassword = $data['oldPassword'];
    $newPassword = $data['newPassword'];
    
    // 获取用户当前密码
    $user = $db->fetchOne("SELECT password FROM user WHERE username = ?", [$username]);
    if (!$user) {
        echo json_encode([
            'success' => false,
            'message' => '用户不存在'
        ]);
        return;
    }
    
    // 验证旧密码
    if (!password_verify($oldPassword, $user['password'])) {
        echo json_encode([
            'success' => false,
            'message' => '旧密码不正确'
        ]);
        return;
    }
    
    // 更新密码
    $encryptedPassword = Helper::encryptPassword($newPassword);
    $db->execute("UPDATE user SET password = ? WHERE username = ?", [$encryptedPassword, $username]);
    
    echo json_encode([
        'success' => true,
        'message' => '密码修改成功'
    ]);
}

/**
 * 设置自动回复
 * @param Database $db 数据库实例
 */
function setAutoReply($db) {
    // 获取请求数据
    $data = json_decode(file_get_contents('php://input'), true);
    
    // 验证请求数据
    if (!$data || empty($data['username'])) {
        echo json_encode([
            'success' => false,
            'message' => '缺少必要参数'
        ]);
        return;
    }
    
    $username = $data['username'];
    $isEnabled = isset($data['isEnabled']) ? (bool)$data['isEnabled'] : false;
    $subject = isset($data['subject']) ? $data['subject'] : '';
    $content = isset($data['content']) ? $data['content'] : '';
    
    // 保存自动回复设置
    $autoReplySettings = [
        'auto_reply_enabled' => $isEnabled ? '1' : '0',
        'auto_reply_subject' => $subject,
        'auto_reply_content' => $content
    ];
    
    // 开始事务
    $pdo = $db->beginTransaction();
    
    try {
        // 删除现有自动回复设置
        $db->execute("DELETE FROM user_settings WHERE user_id = ? AND setting_key LIKE 'auto_reply_%'", [$username]);
        
        // 插入新设置
        foreach ($autoReplySettings as $key => $value) {
            $db->insert(
                "INSERT INTO user_settings (user_id, setting_key, setting_value) VALUES (?, ?, ?)",
                [$username, $key, $value]
            );
        }
        
        // 提交事务
        $db->commit($pdo);
        
        echo json_encode([
            'success' => true,
            'message' => '自动回复设置成功'
        ]);
    } catch (Exception $e) {
        // 回滚事务
        $db->rollback($pdo);
        
        echo json_encode([
            'success' => false,
            'message' => '设置自动回复失败: ' . $e->getMessage()
        ]);
    }
}