<?php

namespace app\models;

use Yii;
use app\components\FlashStorage;
use app\components\SiteHelper;

/**
 * This is the model class for table "{{%user_token}}".
 *
 * @property int $id ID
 * @property int $cx_mch_id 平台商户ID
 * @property int $user_id 用户ID
 * @property int $type 类型
 * @property string $token 令牌
 * @property int $expire_time 失效时间
 * @property int $status 状态，0=未验证，1=验证通过，2=验证未通过，3=已失效
 * @property int $is_delete 是否删除，0=否，1=是
 * @property int $created_at 添加时间
 */
class UserToken extends \yii\db\ActiveRecord
{
    const TYPE_WXMP_LOGIN = 0;      //微信小程序登录token  
    const TYPE_WXOA_LOGIN = 1;      //微信公众号登录token   
    const TYPE_APP_LOGIN = 2;       //APP登录token    
    const TYPE_H5_LOGIN = 3;        //H5登录token    
   
    
    const STATUS_WAITING = 0;   //待验证
    const STATUS_SUCCESS = 1;   //验证通过
    const STATUS_FAILED = 2;    //验证未通过
    const STATUS_VALIDATE = 3;   //验证中
    const STATUS_INVALID = 4;   //失效
    
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return '{{%user_token}}';
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['cx_mch_id', 'user_id', 'type', 'expire_time', 'status', 'is_delete', 'created_at'], 'integer'],
            [['token'], 'required'],
            [['token'], 'string', 'max' => 128],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'cx_mch_id' => '平台商户ID',
            'user_id' => '用户ID',
            'type' => '类型',
            'token' => '令牌',
            'expire_time' => '失效时间',
            'status' => '状态，0=未验证，1=验证通过，2=验证未通过，3=已失效',
            'is_delete' => '是否删除，0=否，1=是',
            'created_at' => '添加时间',
        ];
    }
        
    public function beforeSave($insert) {
        if(parent::beforeSave($insert)){
            if($this->isNewRecord){
            }
            return true;
        } else {
            return false;
        }
    }       
    
    /**
     * 生成token
     * @param integer $type 类型
     * @param integer $len token长度
     * @param integer $retry 重试次数
     */
    public static function generate($type = self::TYPE_WXAPP_LOGIN, $len = 12, $retry = 3, $cx_mch_id = 0)
    {
        $cache_key = "u_t_g_{$cx_mch_id}";
        $cache_val = FlashStorage::getCache($cache_key);
        if($cache_val !== false){
            sleep(1);
            $retry -= 1;
            return $retry >= 0 ? self::generate($type, $len, $retry, $cx_mch_id) : null;
        }
        FlashStorage::setCache($cache_key, $cache_key);
        $token = null;
        while(true){
            $token = self::_generate($len);
            $exists = UserToken::find()->where(['type' => $type, 'token' => $token, 'is_delete' => 0, 'cx_mch_id' => $cx_mch_id])->exists();
            if(!$exists){
                FlashStorage::deleteCache($cache_key);
                break;
            }                                                                                                     
        }
        return $token;
    }
    
    /**
     * 生成指定长度的token
     * @param integer $len 长度
     */
    public static function _generate($len = 12) 
    {
        $chars = "qwertyuiopasdfghjklzxcvbnm1234567890MNBVCXZASDFGHJKLPIUIYTREWQ";
        $max = strlen($chars) - 1;
        $token = "";
        for($i = 0 ; $i < $len; $i++){
            $start = mt_rand(0, $max);
            $token .= $chars[$start];
        }
        //并发情况生成唯一token
        $cache_key = "u_t_n_g_no_{$token}";
        $cache_val = FlashStorage::getCache($cache_key);
        if($cache_val !== false){
            usleep(500);
            return self::_generate($len);
        }    
        FlashStorage::setCache($cache_key, $cache_key,60);   
        
        return $token;
    }
    
    /**
     * 保存token
     * @param string $token token
     * @param integer $type token类型
     * @param integer $expire_time token有效时长，单位秒
     * @param integer $user_id 用户ID
     * @param integer $cx_mch_id 平台商户ID
     */
    public static function saveUserToken($token, $type, $expire_time, $user_id = 0, $cx_mch_id = 0)
    {
        $timestamp = time();
        $model = new UserToken();
        $model->cx_mch_id = $cx_mch_id;
        $model->type = $type;
        $model->token = $token;
        $model->user_id = $user_id;
        $model->expire_time = $timestamp + $expire_time;
        $model->status = self::STATUS_WAITING;
        $model->is_delete = 0;
        $model->created_at = $timestamp;
        if(!$model->save()){
            return SiteHelper::getModelError($model);
        }
        return [
            'code' => 0,
            'msg' => 'ok',
            'data' => [
                'token' => $token
            ]
        ];
    }        
    
    /**
     * 清除已经失效的token
     */
    public static function expiresHandler($cx_mch_id = null, $limit = 200)
    {
        $ids = UserToken::find()
            ->where([
                'is_delete' => 0
            ])
            ->andWhere([
                '<',
                'expire_time',
                time()
            ])
            ->andFilterWhere([
                'cx_mch_id' => $cx_mch_id
            ])
            ->select('id')->limit($limit)->column();
        UserToken::updateAll(['is_delete' => 1],[
            'is_delete' => 0,
            'id' => $ids
        ]);
    }
    
    public static function getOauthConf($type)
    {
        switch ($type){
            //微信小程序登录
            case 0:
                return [
                    'access_token_key' => '405nr7',     //@CX INIT PARAM 
                    'refresh_token_key' => 'I0gd86',    //@CX INIT PARAM 
                    'access_token_max_age' => 60*60*24*30,     //@CX INIT PARAM
                    'refresh_token_max_age' => 2592000, //@CX INIT PARAM 
                    'token_len' => 12,                  //@CX INIT PARAM 生成token长度
                    'token_retry' => 3,                 //@CX INIT PARAM 生成token重试次数
                ];
            //微信公众号登录
            case 1:
                return [
                    'access_token_key' => '02LZh7',     //@CX INIT PARAM 
                    'refresh_token_key' => 'x2Ch1B',    //@CX INIT PARAM 
                    'access_token_max_age' => 7200,     //@CX INIT PARAM
                    'refresh_token_max_age' => 2592000, //@CX INIT PARAM 
                    'token_len' => 13,                  //@CX INIT PARAM 生成token长度
                    'token_retry' => 3,                 //@CX INIT PARAM 生成token重试次数
                ];
            //APP登录
            case 2:
                return [
                    'access_token_key' => '01LZh7',     //@CX INIT PARAM 
                    'refresh_token_key' => 'x1Ch1B',    //@CX INIT PARAM 
                    'access_token_max_age' => 7200,     //@CX INIT PARAM
                    'refresh_token_max_age' => 2592000, //@CX INIT PARAM 
                    'token_len' => 14,                  //@CX INIT PARAM 生成token长度
                    'token_retry' => 3,                 //@CX INIT PARAM 生成token重试次数
                ];
            //H5登录
            case 3:
                return [
                    'access_token_key' => '01LZh7',     //@CX INIT PARAM 
                    'refresh_token_key' => 'x1Ch1B',    //@CX INIT PARAM 
                    'access_token_max_age' => 86400,     //@CX INIT PARAM 
                    'refresh_token_max_age' => 2592000, //@CX INIT PARAM 
                    'token_len' => 14,                  //@CX INIT PARAM 生成token长度
                    'token_retry' => 3,                 //@CX INIT PARAM 生成token重试次数
                ];
            //@TODO 扩展，默认微信小程序登录
            default :
                return [
                    'access_token_key' => '405nr7',     //@CX INIT PARAM 
                    'refresh_token_key' => 'I0gd86',    //@CX INIT PARAM 
                    'access_token_max_age' => 60*60*24*30,     //@CX INIT PARAM
                    'refresh_token_max_age' => 2592000, //@CX INIT PARAM 
                    'token_len' => 12,                  //@CX INIT PARAM 生成token长度
                    'token_retry' => 3,                 //@CX INIT PARAM 生成token重试次数                    
                ];
                
        }
    }
    
    public static function getTypeByPlatform($platform)
    {
        switch ($platform){
            case 'wxmp':
                return UserToken::TYPE_WXMP_LOGIN;
            case 'wxoa':
                return UserToken::TYPE_WXOA_LOGIN;
            case 'app':
                return UserToken::TYPE_APP_LOGIN;
            case 'h5':
                return UserToken::TYPE_H5_LOGIN;
            //@TODO 其它平台
            default :
                return  UserToken::TYPE_WXMP_LOGIN;
        }        
    }
    
    public static function destory($user_id, $type, $cx_mch_id)
    {
        UserToken::updateAll(['is_delete' => 1],[
            'is_delete' => 0,
            'user_id' => $user_id,
            'cx_mch_id' => $cx_mch_id,
            'type' => $type
        ]);
    }    
}