<?php
namespace app\controller;

use app\BaseController;
use think\facade\Db;

//好友控制器
class Friend extends BaseController
{
    
    //获取我下面的好友列表
    public function getMyFriends()
    {
        $userId = $this->getUser()->user_id; //用户ID
        $map1 = ['user_id', '=', $userId];
        $map2 = ['friend_id', '=', $userId];
        $friends = Db::table('tb_friend')
            ->where(['state'       => 1])  //状态必须是已通过
            ->where(function($query) use($map1, $map2) {
                $query->whereOr([$map1, $map2]);
            })
            ->select();
        $friendsData = [];
        foreach ($friends as $friend) {
            $friendId = 0;
            //好友是双向的，先排除自己
            if ($friend['user_id'] == $userId) {
                $firendId = $friend['friend_id'];
            } else {
                $friendId = $friend['user_id'];
            }
            $user = Db::table('tb_user')
                ->where(['id' => $friendId])
                ->find();
            unset($user['password']);
            unset($user['balance']);
            $friendsData[] = $user;
        }
        $this->success('success', [
            'friendCount' => count($friendsData),  //好友列表数量
            'data'        => $friendsData,         //返回所有好友的user数据
        ]);
    }
    
    //添加好友
    public function addFriend()
    {
        $friendId = $this->request->post('friendId');  //需要加好友的用户ID
        $msg = $this->request->post('msg');            //加好友验证消息
        if (empty($msg) || !is_numeric($friendId)) {
            $this->fail(500, '参数校验错误');
        }
        $user = $this->getUser();
        //先判断申请有没有到期，否则不能重复申请加好友
        $friend = Db::table('tb_friend')
            ->where(['user_id'   => $user->user_id])
            ->where(['friend_id' => $friendId])
            ->find();
        if ($friend && $friend['state'] == 1) {
            $this->fail(501, '对方已经是您的好友。');
        }
        if ($friend && $friend['state'] == 2) {
            $this->fail(503, '对方已拒绝，暂时还无法加好友。');
        }
        if ($friend && $friend['expired_at'] > time()) {
            $this->fail(502, '对方还未同意，请耐心等待');
        }
        $requestId = 0;
        if (!$friend) {
            $requestId = Db::table('tb_friend')
                ->insertGetId([
                    'user_id'    => $user->user_id,
                    'friend_id'  => $friendId,
                    'state'      => 0,
                    'msg'        => $msg,
                    'created_at' => time(),
                    'updated_at' => time(),
                    'expired_at' => time() + 60 * 60 * 48,  //48小时后到期，期间内不可以重复添加
                ]);
        } else {
            $requestId = $friend['id'];
            Db::table('tb_friend')
                ->where(['user_id'   => $user->user_id])
                ->where(['friend_id' => $friendId])
                ->update([
                    'updated_at' => time(),
                    'expired_at' => time() + 60 * 60 * 48,
                ]);
        }
        $this->success('success', [
            'requestId' => $requestId,
        ]);
    }
    
    //接受添加好友
    public function acceptFriend()
    {
        $requestId = $this->request->post('requestId'); //请求ID
        $isAccept = $this->request->post('isAccept');   //是否接受添加好友  1:接受  0:拒绝
        if (!is_numeric($requestId) || !is_numeric($isAccept)) {
            $this->fail(500, '参数校验错误');
        }
        $isAccept = intval($isAccept);
        if (!in_array($isAccept, [0, 1])) {
            $this->fail(500, '参数校验错误');
        }
        //requestId是否存在
        $friend = Db::table('tb_friend')
            ->where(['friend_id' => $this->getUser()->user_id])
            ->where(['id'        => $requestId])
            ->find();
        if (!$friend) {
            $this->fail(501, 'requestId不存在');
        }
        //判断是否到期
        if ($friend['expired_at'] < time()) {
            $this->fail(502, '好友验证已经过期，无法通过');
        }
        Db::table('tb_friend')
            ->where(['id'        => $requestId])
            ->where(['friend_id' => $this->getUser()->user_id])
            ->update([
                'updated_at' => time(),
                'friend_id'  => $this->getUser()->user_id,
                'state'      => $isAccept == 1 ? 1 : 2,
            ]);
        $this->success('success', null);
    }
    
    
    //获取好友验证消息，过期的不再获取
    public function getAcceptFriendMessage()
    {
        $data = Db::table('tb_friend')
            ->where(['friend_id' => $this->getUser()->user_id])
            ->where('expired_at', '<', time())
            ->order('created_at DESC')
            ->select();
        $this->success('success', $data);
    }
}