import userModel from '../models/user.js'
import yapi from '../yapi.js'
import baseController from './base.js'
import mongoose from 'mongoose'
import request from 'request'

const jwt = require('jsonwebtoken');

class userController extends baseController{
    constructor(ctx){
        super(ctx)
    }
    /**
     * 用户登录接口
     * @interface /user/login
     * @method POST
     * @category user
     * @foldnumber 10
     * @param {String} email email名称，不能为空
     * @param  {String} password 密码，不能为空
     * @returns {Object} 
     * @example ./api/user/login.json
     */
    async login(ctx){   //登录
        let userInst = yapi.getInst(userModel); //创建user实体
        let email = ctx.request.body.email;
        let password = ctx.request.body.password;
        
        if(!email){
            return ctx.body = yapi.commons.resReturn(null,400,'email不能为空');
        }
         if(!password){
            return ctx.body = yapi.commons.resReturn(null,400,'密码不能为空');
        }

        let result = await userInst.findByEmail(email);
        
        
        if(!result){
            return ctx.body = yapi.commons.resReturn(null,404,'该用户不存在');  
        }else if(yapi.commons.generatePassword(password, result.passsalt) === result.password){ 
            this.setLoginCookie(result._id, result.passsalt)
            
            return ctx.body = yapi.commons.resReturn({
                uid: result._id,
                email: result.email,
                add_time: result.add_time,
                up_time: result.up_time

            }, 0, 'logout success...'); 
        }else{
            return ctx.body = yapi.commons.resReturn(null, 405, '密码错误');
        }
    }

    /**
     * 退出登录接口
     * @interface /user/logout
     * @method GET
     * @category user
     * @foldnumber 10
     * @returns {Object} 
     * @example ./api/user/logout.json
     */

    async logout(ctx){
        ctx.cookies.set('_yapi_token', null);
        ctx.cookies.set('_yapi_uid', null);
        ctx.body = yapi.commons.resReturn('ok');
    }


    /**
     *  第三方登录需要提供一个request方法和 token字段，暂时只支持qunar第三方
     * @return {email: String, username: String}
     */
    thirdQunarLogin(){
        return {
            request: (token) => {
                return new Promise((resolve, reject) =>{
                    request('http://qsso.corp.qunar.com/api/verifytoken.php?token=' + token ,function (error, response, body) {
                        if (!error && response.statusCode == 200) {
                            let result = JSON.parse(body);
                            if(result && result.ret === true){
                                console.log(result)
                                let ret = {
                                    email: result.userId + '@qunar.com',
                                    username: result.data.userInfo.name
                                }
                                resolve(ret)  
                            }else{
                                reject(result)
                            }                        
                        }
                        reject(error)
                    })
                })
            },
            tokenField: 'token',
        }
    }



    async loginByToken(ctx){
        let config = this.thirdQunarLogin();

        let token = ctx.request.body[config.tokenField] || ctx.request.query[config.tokenField];
        
        try{
            let ret = await config.request(token);
            let login = await this.handleThirdLogin(ret.email, ret.username);
            if(login === true){
                yapi.commons.log('login success');
                ctx.redirect('/')
            }
        }catch(e){
            yapi.commons.log(e.message, 'error')
            ctx.redirect('/')
        }
    }

    async handleThirdLogin(email, username){
        let user, data, passsalt;       
        var userInst = yapi.getInst(userModel); 
        try{
            user = await userInst.findByEmail(email);
            if(!user ||  !user._id){
                passsalt = yapi.commons.randStr();
                data = {
                    username: username,
                    password: yapi.commons.generatePassword(passsalt, passsalt),
                    email: email,
                    passsalt: passsalt,
                    role: 'member',
                    add_time: yapi.commons.time(),
                    up_time: yapi.commons.time()
                }
                user = await userInst.save(data);
            }
            
            this.setLoginCookie(user._id, user.passsalt)
            return true;
        }catch(e){            
            console.error(e.message)
            return false;
        }
    }

    async changePassword(ctx){
        let params = ctx.request.body;
        var userInst = yapi.getInst(userModel); 
        if(this.getRole() !== 'admin' && params.uid != this.getUid()){
            return ctx.body = yapi.commons.resReturn(null, 402, '没有权限');
        }
        let passsalt = yapi.commons.randStr();
        let data = {
            up_time: yapi.commons.time(),
            password: yapi.commons.generatePassword(passsalt, passsalt),
            passsalt: passsalt
        }
        try{
            let result = await userInst.update(id, data);
            ctx.body = yapi.commons.resReturn(result);
        }catch(e){
            ctx.body = yapi.commons.resReturn(null, 401, e.message);
        }
    }

    async forgetPassword(ctx){
        
    }

    async resetPassword(ctx){
        
    }

    setLoginCookie(uid, passsalt){
        let token = jwt.sign({uid: uid},passsalt,{expiresIn: '7 days'});            
        this.ctx.cookies.set('_yapi_token', token, {
            expires: yapi.commons.expireDate(7),
            httpOnly: true
        })
        this.ctx.cookies.set('_yapi_uid', uid, {
            expires: yapi.commons.expireDate(7),
            httpOnly: true
        })
    }


    /**
     * 用户注册接口
     * @interface /user/reg
     * @method POST
     * @category user
     * @foldnumber 10
     * @param {String} email email名称，不能为空
     * @param  {String} password 密码，不能为空
     * @param {String} [username] 用户名
     * @returns {Object} 
     * @example ./api/user/login.json
     */
    async reg(ctx){  //注册
        var userInst = yapi.getInst(userModel); 
        let params = ctx.request.body; //获取请求的参数,检查是否存在用户名和密码
        if(!params.email){
            return ctx.body = yapi.commons.resReturn(null,400,'邮箱不能为空'); 
        }
        if(!params.password){
            return ctx.body = yapi.commons.resReturn(null,400,'密码不能为空'); 
        }
                
        var checkRepeat = await userInst.checkRepeat(params.email);//然后检查是否已经存在该用户
        if(checkRepeat>0){
            return ctx.body = yapi.commons.resReturn(null,401,'该email已经注册');
        }

        let passsalt = yapi.commons.randStr();
        let data = {
            username: params.username,
            password: yapi.commons.generatePassword(params.password, passsalt),//加密
            email: params.email,
            passsalt: passsalt,
            role: 'member',
            add_time: yapi.commons.time(),
            up_time: yapi.commons.time()
        }
        try{
            let user = await userInst.save(data);
            this.setLoginCookie(user._id, user.passsalt)
            
            ctx.body = yapi.commons.resReturn({
                uid: user._id,
                email: user.email,
                add_time: user.add_time,
                up_time: user.up_time,
                role: 'member'
            });
            yapi.commons.sendMail({
                to: params.email,
                contents: `欢迎注册，您的账号 ${params.email} 已经注册成功`
            })
        }catch(e){
            ctx.body = yapi.commons.resReturn(null, 401, e.message);
        }
    }


    /**
     * 获取用户列表
     * @interface /user/list
     * @method GET
     * @category user
     * @foldnumber 10
     * @returns {Object} 
     * @example 
     */

    async list(ctx){
        if(this.getRole() !== 'admin'){
            return ctx.body = yapi.commons.resReturn(null, 402, '没有权限');
        }
        var userInst = yapi.getInst(userModel);
        try{
            let user = await  userInst.list();
            return ctx.body = yapi.commons.resReturn(user);
        }catch(e){
            return ctx.body = yapi.commons.resReturn(null,402,e.message);
        }
    }

    /**
     * 获取用户个人信息
     * @interface /user/find
     * @method GET
     * @param id 用户uid
     * @category user
     * @foldnumber 10
     * @returns {Object} 
     * @example 
     */

    async findById(ctx){    //根据id获取用户信息
         try{
            var userInst = yapi.getInst(userModel);
            let id = ctx.request.body.id;
            let result = await userInst.findById(id);
            return ctx.body = yapi.commons.resReturn(result);
        }catch(e){
            return ctx.body = yapi.commons.resReturn(null,402,e.message);
        }
    }

    /**
     * 删除用户,只有admin用户才有此权限
     * @interface /user/del
     * @method POST
     * @param id 用户uid
     * @category user
     * @foldnumber 10
     * @returns {Object} 
     * @example 
     */
    async del(ctx){   //根据id删除一个用户
        try{
            if(this.getRole() !== 'admin'){
                return ctx.body = yapi.commons.resReturn(null, 402, 'Without permission.');
            }
            var userInst = yapi.getInst(userModel);
            let id = ctx.request.body.id;
            let result = await userInst.del(id);
            ctx.body = yapi.commons.resReturn(result);
        }catch(e){
            ctx.body = yapi.commons.resReturn(null,402,e.message);
        }
    }

    /**
     * 更新用户个人信息
     * @interface /user/update
     * @method POST
     * @param username String
     * @param email String
     * @category user
     * @foldnumber 10
     * @returns {Object} 
     * @example 
     */
    async update(ctx){    //更新用户信息
        try{
            var userInst = yapi.getInst(userModel);
            let id = this.getUid();
            let data ={
                up_time: yapi.commons.time()
            };
            ctx.request.body.username && (data.username = ctx.request.body.username)
            ctx.request.body.email && (data.email = ctx.request.body.email)

            if(data.email){
                var checkRepeat = await userInst.checkRepeat(data.email);//然后检查是否已经存在该用户
                if(checkRepeat>0){
                    return ctx.body = yapi.commons.resReturn(null,401,'该email已经注册');
                }
            }


            let result = await userInst.update(id, data);
            ctx.body = yapi.commons.resReturn(result);
        }catch(e){
            ctx.body = yapi.commons.resReturn(null,402,e.message);
        }
    }
}

module.exports = userController