<?php
namespace app\index\controller;

use think\Controller;
use app\index\model\User;
use think\facade\Redirect;
use \think\facade\Log;
use \think\facade\Cache;

class UserController extends BaseController
{
    /**
     * 用户登录
     *
     * @return \think\Response
     */
    public function login()
    {
        // 增加日志记录，记录用户访问登录页面的操作
        Log::record('用户访问登录页面', 'info');

        // 如果用户已经登录，直接跳转到主页
        if (session('user_id')) {
            return redirect('index');
        } else {
            //跳转登录界面
            return view('login');
        }
    }

    /**
     * 用户注册
     *
     * @return \think\Response
     */
    public function register()
    {
        if ($this->request->isPost()) {
            $data = $this->request->post();
            $type = $data['type'] ?? 'account'; // 注册类型：account-账号密码，phone-手机号，wechat-微信

            try {
                switch ($type) {
                    case 'account':
                        // 账号密码注册
                        $validate = validate([
                            'username' => 'require|min:3|max:20|unique:user',
                            'password' => 'require|min:6|max:20',
                            'confirm_password' => 'require|confirm:password'
                        ], [
                            'username.require' => '用户名不能为空',
                            'username.min' => '用户名长度不能小于3个字符',
                            'username.max' => '用户名长度不能超过20个字符',
                            'username.unique' => '用户名已存在',
                            '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',
                            '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' => 0, 'msg' => $validate->getError()]);
                        }

                        $user = new UserModel;
                        $user->username = $data['username'];
                        $user->password = password_hash($data['password'], PASSWORD_DEFAULT);
                        $user->create_time = time();
                        $user->save();

                        return json(['code' => 1, 'msg' => '注册成功']);

                    case 'phone':
                        // 手机号注册
                        $validate = validate([
                            'phone' => 'require|mobile|unique:user',
                            'code' => 'require|number|length:6'
                        ], [
                            'phone.require' => '手机号不能为空',
                            'phone.mobile' => '手机号格式不正确',
                            'phone.unique' => '该手机号已注册',
                            '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'
                        ]);

                        if (!$validate->check($data)) {
                            return json(['code' => 0, 'msg' => $validate->getError()]);
                        }

                        // 验证短信验证码
                        $smsCode = cache('sms_code_' . $data['phone']);
                        if (!$smsCode || $smsCode != $data['code']) {
                            return json(['code' => 0, 'msg' => '验证码错误或已过期']);
                        }

                        $user = new UserModel;
                        $user->phone = $data['phone'];
                        $user->create_time = time();
                        $user->save();

                        // 清除验证码缓存
                        cache('sms_code_' . $data['phone'], null);

                        return json(['code' => 1, 'msg' => '注册成功']);

                    case 'wechat':
                        // 微信注册
                        $validate = validate([
                            'openid' => 'require|unique:user'
                        ], [
                            'openid.require' => '微信授权失败',
                            'openid.unique' => '该微信账号已注册'
                        ]);

                        if (!$validate->check($data)) {
                            return json(['code' => 0, 'msg' => $validate->getError()]);
                        }

                        $user = new UserModel;
                        $user->openid = $data['openid'];
                        $user->nickname = $data['nickname'] ?? '';
                        $user->avatar = $data['avatar'] ?? '';
                        $user->create_time = time();
                        $user->save();

                        return json(['code' => 1, 'msg' => '注册成功']);

                    default:
                        return json(['code' => 0, 'msg' => '注册类型错误']);
                }
            } catch (\Exception $e) {
                return json(['code' => 0, 'msg' => '注册失败：' . $e->getMessage()]);
            }
        }

        return $this->fetch();
    }

    /**
     * 退出登录
     *
     * @return \think\Response
     */
    public function logout()
    {
        // 增加日志记录，记录用户退出登录操作
        Log::record('用户退出登录', 'info');

        // 销毁当前会话中的所有数据
        session(null);

        // 清除缓存中的用户信息
        Cache::tag('user_cache')->clear();
        return redirect('login');
    }

    // 发送短信验证码
    public function sendSmsCode()
    {
        if ($this->request->isPost()) {
            $phone = $this->request->post('phone');
            
            // 验证手机号
            $validate = validate([
                'phone' => 'require|mobile|unique:user'
            ], [
                'phone.require' => '手机号不能为空',
                'phone.mobile' => '手机号格式不正确',
                'phone.unique' => '该手机号已注册'
            ]);

            if (!$validate->check(['phone' => $phone])) {
                return json(['code' => 0, 'msg' => $validate->getError()]);
            }

            // 生成6位随机验证码
            $code = mt_rand(100000, 999999);
            
            // 这里应该调用短信服务商API发送验证码
            // 示例代码，实际使用时需要替换为真实的短信发送逻辑
            try {
                // TODO: 调用短信服务商API发送验证码
                // $result = sendSms($phone, $code);
                
                // 将验证码保存到缓存，有效期5分钟
                cache('sms_code_' . $phone, $code, 300);
                
                return json(['code' => 1, 'msg' => '验证码发送成功']);
            } catch (\Exception $e) {
                return json(['code' => 0, 'msg' => '验证码发送失败：' . $e->getMessage()]);
            }
        }
        
        return json(['code' => 0, 'msg' => '非法请求']);
    }

    // 微信授权回调
    public function wechatCallback()
    {
        $code = $this->request->get('code');
        if (!$code) {
            return json(['code' => 0, 'msg' => '微信授权失败']);
        }

        try {
            // 这里应该调用微信API获取用户信息
            // 示例代码，实际使用时需要替换为真实的微信API调用逻辑
            // $wechatUser = getWechatUserInfo($code);
            
            // 模拟获取到的微信用户信息
            $wechatUser = [
                'openid' => 'test_openid_' . time(),
                'nickname' => '微信用户',
                'avatar' => ''
            ];

            // 检查用户是否已注册
            $user = UserModel::where('openid', $wechatUser['openid'])->find();
            if ($user) {
                // 已注册，直接登录
                session('user_id', $user->id);
                return json(['code' => 1, 'msg' => '登录成功']);
            }

            // 未注册，返回注册所需信息
            return json([
                'code' => 2,
                'msg' => '需要注册',
                'data' => $wechatUser
            ]);
        } catch (\Exception $e) {
            return json(['code' => 0, 'msg' => '微信授权失败：' . $e->getMessage()]);
        }
    }
}