<?php

namespace app\api\controller\course;

use app\common\controller\Api;
use app\admin\model\course\Course as CourseModel;
use app\common\model\user\Subscription as SubscriptionModel;
/**
 * 订阅课程
 */
class Subscription extends Api
{
    // 无需登录的接口,*表示全部
    protected $noNeedLogin = [];
    protected $noNeedRight = '*';
    protected $courseModel;
    protected $SubscriptionModel;
    public function _initialize()
    {
        parent::_initialize();
        $this->courseModel = new CourseModel();
        $this->SubscriptionModel = new SubscriptionModel();
    }

    /**
     * 密码兑换
     * @return void
     */
    public function passwordPay(){
        $password = $this->request->post('password','');
        $courseId = $this->request->post('course_id','');

        $userId = $this->auth->id;

        if(empty($password) || empty($courseId)){
            $this->error('请完善参数后再提交');
        }

        //获取课程详情
        $courseInfo = $this->courseModel->where([
            'id'=>$courseId,
            'status'=>1,
            'pay_type'=>'password'
        ])->find();
        if (!$courseInfo) {
            $this->error(__('未找到相关课程信息'));
        }
        $courseInfo = $courseInfo->toArray();

        \app\common\model\course\Course::checkSalesType($courseInfo);

        if($courseInfo['password'] != $password){
            $this->error(__('兑换密码错误'));
        }

        //判断是否订阅过了
        $userCourse = $this->SubscriptionModel->getUserCourse($userId,$courseId);
        if($userCourse){
            $this->error(__('该课程已经订阅过了'));
        }

        //添加订阅记录
        $result = $this->SubscriptionModel->setUserCourse($userId,$courseId);

        if(!$result){
            $this->error(__('订阅失败'));
        }

        $this->success('订阅成功');
    }

    /**
     * 免费加入学习
     * 适用以下任一情形：
     *  1. 课程本身免费（pay_type=free 或 pay_type=pay 且价格为 0）→ get_type=free
     *  2. 用户付费会员卡免费权益命中该课程 → get_type=vip
     * 仅支持 article/video/audio/live/column 类型课程
     * @return void
     */
    public function free(){
        $courseId = $this->request->post('course_id','');

        $userId = $this->auth->id;

        if(empty($courseId)){
            $this->error('请完善参数后再提交');
        }

        //获取课程详情
        $courseInfo = $this->courseModel->where([
            'id'=>$courseId,
            'status'=>1
        ])->find();


        if (!$courseInfo) {
            $this->error(__('未找到相关课程信息'));
        }

        //仅支持指定类型的课程加入学习
        $allowTypes = ['article','video','audio','live','column'];
        if (!in_array($courseInfo['type'], $allowTypes)) {
            $this->error(__('当前课程类型不支持加入学习'));
        }

        //加入学习的资格判定：课程免费 或 用户付费会员卡免费权益命中
        $isFreeCourse = \app\common\model\user\Subscription::isFreeCourse($courseId);
        $hasVipFreeAccess = false;
        if (!$isFreeCourse) {
            $hasVipFreeAccess = \app\common\model\user\Subscription::getVipFreeAccess($userId, $courseId);
        }

        if (!$isFreeCourse && !$hasVipFreeAccess) {
            $this->error(__('当前没有加入学习的资格'));
        }

        \app\common\model\course\Course::checkSalesType($courseInfo);

        //判断是否订阅过了
        $userCourse = $this->SubscriptionModel->getUserCourse($userId,$courseId);
        if($userCourse){
            $this->error(__('该课程已经加入学习'));
        }

        $validityTime = $this->SubscriptionModel->getValidityTime($courseInfo);

        if($validityTime < time()){
            $this->error(__('该课程有效时间不支持订阅'));
        }

        //标记 get_type：课程免费时为 free，VIP 权益命中时为 vip
        $getType = $isFreeCourse ? 'free' : 'vip';

        //添加订阅记录
        $result = $this->SubscriptionModel->setUserCourse($userId,$courseId,$getType);

        if(!$result){
            $this->error(__('加入学习失败'));
        }

        $this->success('加入学习成功');
    }


    /**
     * 获取我的订阅
     * @return void
     */
    public function getMySubscription(){
        $limit = input('limit',10);
        $page = input('page',1);
        $type = input('type','all');
        $list = $this->SubscriptionModel->getMyCourse($this->auth->id,[
            'limit'=>$limit,
            'page'=>$page,
            'type'=>$type
        ]);
        $this->success('订阅成功',$list);
    }
}