<?php
namespace app\api\controller;

use app\api\controller\BaseController;
use app\api\model\AdminUser;
use app\api\model\AdminSysMenu;

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

class AdminController extends BaseController
{
    /**
     * 生成管理员token
     *
     * @param int $userId 管理员ID
     * @return string
     */
    private function generateToken($userId)
    {
        // 生成一个简单的token，包含用户ID和时间戳
        $data = [
            'user_id' => $userId,
            'timestamp' => time(),
            'random' => mt_rand(100000, 999999)
        ];
        
        // 使用base64编码，实际项目中建议使用JWT
        return base64_encode(json_encode($data));
    }

    /**
     * 从token中获取管理员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;
    }

    /**
     * 管理员登录接口
     *
     * @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()]);
            }

            // 查询管理员
            $user = AdminUser::where('account', $data['account'])->find();
            if (!$user) {
                return json(['code' => 1, 'msg' => '管理员不存在']);
            }

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

            // 生成token
            $token = $this->generateToken($user->uid);

            // 将token存储到缓存中，设置过期时间
            Cache::set('admin_token_' . $user->uid, $token, 7 * 24 * 3600);

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

            // 返回管理员信息和token
            return json([
                'code' => 0,
                'msg' => '登录成功',
                'data' => [
                        'token' => $token,
                        'user_info' => [
                                'id' => $user->uid,
                                '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('管理员登录失败：' . $e->getMessage(), 'error');
            return json(['code' => 1, 'msg' => '登录失败：' . $e->getMessage()]);
        }
    }

    /**
     * 退出登录接口
     *
     * @return \think\Response
     */
    public function logout()
    {
        try {
            $token = $this->request->header('Authorization');
            if ($token) {
                // 去掉Bearer前缀
                if (strpos($token, 'Bearer ') === 0) {
                    $token = substr($token, 7);
                }
                
                // 从token中获取管理员ID
                $userId = $this->getUserIdFromToken($token);
                if ($userId) {
                    // 清除token缓存
                    Cache::delete('admin_token_' . $userId);
                }
            }

            Log::record('管理员退出登录', 'info');
            // 增加前端刷新指示
            return json([
                'code' => 0,
                'msg' => '退出成功',
                'refresh' => true // 前端可根据此字段判断是否需要刷新
            ]);

        } 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()]);
        }
    }

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

            // 去掉Bearer前缀
            if (strpos($token, 'Bearer ') === 0) {
                $token = substr($token, 7);
            }

            $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('admin_token_' . $userId);
            
            if (!$cachedToken || $cachedToken !== $token) {
                return json(['code' => 1, 'msg' => 'token已过期']);
            }

            // 获取管理员信息
            $user = AdminUser::where('uid', $userId)->find();
            if (!$user) {
                return json(['code' => 1, 'msg' => '管理员不存在']);
            }

            return json([
                'code' => 0, 
                'msg' => '获取成功',
                'data' => [
                    'id' => $user->uid,
                    '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('获取管理员信息失败：' . $e->getMessage(), 'error');
            return json(['code' => 1, 'msg' => '获取管理员信息失败：' . $e->getMessage()]);
        }
    }

    /**
     * 修改密码接口
     *
     * @return \think\Response
     */
    public function changePassword()
    {
        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']);
            }

            // 去掉Bearer前缀
            if (strpos($token, 'Bearer ') === 0) {
                $token = substr($token, 7);
            }

            $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('admin_token_' . $userId);
            if (!$cachedToken || $cachedToken !== $token) {
                return json(['code' => 1, 'msg' => 'token已过期']);
            }

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

            // 验证数据
            $validate = validate([
                'oldPassword' => 'require',
                'newPassword' => 'require|min:6'
            ], [
                'oldPassword.require' => '原密码不能为空',
                'newPassword.require' => '新密码不能为空',
                'newPassword.min' => '新密码长度不能少于6位'
            ]);

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

            // 获取管理员信息
            $user = AdminUser::where('uid', $userId)->find();
            if (!$user) {
                return json(['code' => 1, 'msg' => '管理员不存在']);
            }

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

            // 更新密码
            $user->password = md5($data['newPassword']);
            $user->save();

            Log::record('管理员修改密码成功：' . $user->account, 'info');

            return json(['code' => 0, 'msg' => '密码修改成功']);

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

    /**
     * 获取管理员菜单接口
     *
     * @return \think\Response
     */
    public function menus()
    {
        try {
            // 取消token验证，直接获取菜单数据
            $menus = AdminSysMenu::getMenuTree();

            return json([
                'code' => 0,
                'msg' => '获取成功',
                'data' => $menus
            ]);
        } catch (\Exception $e) {
            Log::record('获取菜单失败：' . $e->getMessage(), 'error');
            return json(['code' => 1, 'msg' => '获取菜单失败：' . $e->getMessage()]);
        }
    }
}