<?php
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 * 商业使用授权协议
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 * 
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 */

namespace app\api\controller;

use app\api\controller\BaseController;
use app\index\model\User\Users as Users;
use app\index\model\User\UsersGroup as UsersGroup;


use think\facade\Log;
use think\facade\Cache;
use think\Response;

class UserController extends BaseController
{
    /**
     * 用户登录接口
     *
     * @return \think\Response
     */
    public function login()
    {
        if (!$this->request->isPost()) {
            return json(['code' => 1, 'msg' => '请求方法错误']);
        }

        $data = $this->request->post();

        try {
            // 验证数据
            $validate = validate([
                'account' => 'require|email',
                'password' => 'require'
            ], [
                'account.require' => '账户不能为空',
                'account.email' => '邮箱格式不正确',
                'password.require' => '密码不能为空'
            ]);

            if (!$validate->check($data)) {
                return json(['code' => 1, 'msg' => $validate->getError()]);
            }

            // 查询用户
            $user = Users::where('account', $data['account'])->find();
            if (!$user) {
                return json(['code' => 1, 'msg' => '用户不存在']);
            }

            // 验证密码
            if ($user->password !== md5($data['password'])) {
                return json(['code' => 1, 'msg' => '密码错误']);
            }

            // 生成JWT token（这里使用简单的token，实际项目中建议使用JWT）
            $token = $this->generateToken($user->id);
            
            // 将token存储到缓存中，设置过期时间
            Cache::set('user_token_' . $user->id, $token, 7 * 24 * 3600);

            // 记录登录日志
            Log::record('用户登录成功：' . $user->account, 'info');

            // 返回用户信息和token
            return json([
                'code' => 0, 
                'msg' => '登录成功',
                'data' => [
                    'token' => $token,
                    'user_info' => [
                        'id' => $user->id,
                        'account' => $user->account,
                        'name' => $user->name,
                        'avatar' => $user->avatar ?? '/static/images/avatar.png',
                        'phone' => $user->phone ?? '',
                        'sex' => $user->sex ?? 0,
                        'qq' => $user->qq ?? '',
                        'wechat' => $user->wechat ?? '',
                        'create_time' => $user->create_time
                    ]
                ]
            ]);

        } catch (\Exception $e) {
            Log::record('登录失败：' . $e->getMessage(), 'error');
            return json(['code' => 1, 'msg' => '登录失败：' . $e->getMessage()]);
        }
    }

    /**
     * 用户注册接口
     *
     * @return \think\Response
     */
    public function register()
    {
        if (!$this->request->isPost()) {
            return json(['code' => 1, 'msg' => '请求方法错误']);
        }

        $data = $this->request->post();

        try {
            // 验证数据
            $validate = validate([
                'account' => 'require|email|unique:users',
                'code' => 'require|number|length:6',
                'password' => 'require|min:6|max:20',
                'repassword' => 'require|confirm:password'
            ], [
                'account.require' => '账户不能为空',
                'account.email' => '邮箱格式不正确',
                'account.unique' => '该邮箱已注册',
                'code.require' => '验证码不能为空',
                'code.number' => '验证码必须为数字',
                'code.length' => '验证码长度必须为6位',
                'password.require' => '密码不能为空',
                'password.min' => '密码长度不能小于6个字符',
                'password.max' => '密码长度不能超过20个字符',
                'repassword.require' => '确认密码不能为空',
                'repassword.confirm' => '两次输入的密码不一致'
            ]);

            if (!$validate->check($data)) {
                return json(['code' => 1, 'msg' => $validate->getError()]);
            }

            // 验证邮箱验证码
            $emailCode = Cache::get('email_code_' . $data['account']);
            if (!$emailCode || $emailCode != $data['code']) {
                return json(['code' => 1, 'msg' => '验证码错误或已过期']);
            }

            // 创建用户
            $user = new Users;
            $user->account = $data['account'];
            $user->password = md5($data['password']);
            $user->name = $this->generateRandomName();
            $user->create_time = time();
            $user->save();

            // 清除验证码缓存
            Cache::delete('email_code_' . $data['account']);

            return json(['code' => 0, 'msg' => '注册成功']);

        } catch (\Exception $e) {
            return json(['code' => 1, 'msg' => '注册失败：' . $e->getMessage()]);
        }
    }

    /**
     * 退出登录接口
     *
     * @return \think\Response
     */
    public function logout()
    {
        try {
            $token = $this->request->header('Authorization');
            if ($token) {
                // 从token中获取用户ID
                $userId = $this->getUserIdFromToken($token);
                if ($userId) {
                    // 清除token缓存
                    Cache::delete('user_token_' . $userId);
                }
            }

            Log::record('用户退出登录', 'info');
            return json(['code' => 0, 'msg' => '退出成功']);

        } catch (\Exception $e) {
            Log::record('退出登录失败：' . $e->getMessage(), 'error');
            return json(['code' => 1, 'msg' => '退出失败：' . $e->getMessage()]);
        }
    }

    /**
     * 获取用户信息接口
     *
     * @return \think\Response
     */
    public function getUserInfo()
    {
        try {
            $token = $this->request->header('Authorization');
            if (!$token) {
                return json(['code' => 1, 'msg' => '请先登录']);
            }

            $userId = $this->getUserIdFromToken($token);
            if (!$userId) {
                return json(['code' => 1, 'msg' => 'token无效']);
            }

            // 验证token是否在缓存中
            $cachedToken = Cache::get('user_token_' . $userId);
            if (!$cachedToken || $cachedToken !== $token) {
                return json(['code' => 1, 'msg' => 'token已过期']);
            }

            // 获取用户信息
            $user = Users::find($userId);
            if (!$user) {
                return json(['code' => 1, 'msg' => '用户不存在']);
            }

            return json([
                'code' => 0, 
                'msg' => '获取成功',
                'data' => [
                    'id' => $user->id,
                    'account' => $user->account,
                    'name' => $user->name,
                    'avatar' => $user->avatar ?? '/static/images/avatar.png',
                    'phone' => $user->phone ?? '',
                    'sex' => $user->sex ?? 0,
                    'qq' => $user->qq ?? '',
                    'wechat' => $user->wechat ?? '',
                    'create_time' => $user->create_time
                ]
            ]);

        } catch (\Exception $e) {
            return json(['code' => 1, 'msg' => '获取用户信息失败：' . $e->getMessage()]);
        }
    }

    /**
     * 发送邮箱验证码接口
     *
     * @return \think\Response
     */
    public function sendEmailCode()
    {
        if (!$this->request->isPost()) {
            return json(['code' => 1, 'msg' => '请求方法错误']);
        }

        $email = $this->request->post('account');
        if (empty($email)) {
            return json(['code' => 1, 'msg' => '邮箱不能为空']);
        }

        // 验证邮箱格式
        if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
            return json(['code' => 1, 'msg' => '邮箱格式不正确']);
        }

        // 检查邮箱是否已注册
        $exists = Users::where('account', $email)->find();
        if ($exists) {
            return json(['code' => 1, 'msg' => '该邮箱已注册']);
        }

        // 生成6位随机验证码
        $code = mt_rand(100000, 999999);

        // 这里应该调用邮件发送服务
        // 为了演示，我们直接返回成功
        // 实际项目中需要实现邮件发送逻辑
        
        // 将验证码存入缓存，有效期5分钟
        Cache::set('email_code_' . $email, $code, 300);
        
        return json(['code' => 0, 'msg' => '验证码已发送']);
    }

    /**
     * 修改密码接口
     *
     * @return \think\Response
     */
    public function updatePassword()
    {
        if (!$this->request->isPost()) {
            return json(['code' => 1, 'msg' => '请求方法错误']);
        }

        try {
            $token = $this->request->header('Authorization');
            if (!$token) {
                return json(['code' => 1, 'msg' => '请先登录']);
            }

            $userId = $this->getUserIdFromToken($token);
            if (!$userId) {
                return json(['code' => 1, 'msg' => 'token无效']);
            }

            $data = $this->request->post();
            
            // 验证数据
            $validate = validate([
                'old_password' => 'require',
                'new_password' => 'require|min:6|max:20',
                'confirm_password' => 'require|confirm:new_password'
            ], [
                'old_password.require' => '旧密码不能为空',
                'new_password.require' => '新密码不能为空',
                'new_password.min' => '新密码长度不能小于6个字符',
                'new_password.max' => '新密码长度不能超过20个字符',
                'confirm_password.require' => '确认密码不能为空',
                'confirm_password.confirm' => '两次输入的密码不一致'
            ]);

            if (!$validate->check($data)) {
                return json(['code' => 1, 'msg' => $validate->getError()]);
            }

            // 获取用户信息
            $user = Users::find($userId);
            if (!$user) {
                return json(['code' => 1, 'msg' => '用户不存在']);
            }

            // 验证旧密码
            if ($user->password !== md5($data['old_password'])) {
                return json(['code' => 1, 'msg' => '旧密码错误']);
            }

            // 更新密码
            $user->password = md5($data['new_password']);
            $user->update_time = time();

            if ($user->save()) {
                // 清除token，要求重新登录
                Cache::delete('user_token_' . $userId);
                return json(['code' => 0, 'msg' => '密码修改成功，请重新登录']);
            } else {
                return json(['code' => 1, 'msg' => '密码修改失败']);
            }

        } catch (\Exception $e) {
            return json(['code' => 1, 'msg' => '密码修改失败：' . $e->getMessage()]);
        }
    }

    /**
     * 生成简单的token
     *
     * @param int $userId
     * @return string
     */
    private function generateToken($userId)
    {
        $data = [
            'user_id' => $userId,
            'timestamp' => time(),
            'random' => mt_rand(100000, 999999)
        ];
        
        return base64_encode(json_encode($data));
    }

    /**
     * 从token中获取用户ID
     *
     * @param string $token
     * @return int|null
     */
    private function getUserIdFromToken($token)
    {
        try {
            $data = json_decode(base64_decode($token), true);
            if ($data && isset($data['user_id'])) {
                return $data['user_id'];
            }
        } catch (\Exception $e) {
            return null;
        }
        
        return null;
    }

    /**
     * 生成随机用户名
     *
     * @return string
     */
    private function generateRandomName()
    {
        return '云朵_' . mt_rand(100000, 999999);
    }
}