/* eslint no-unused-vars: ["error", { "args": "none" }] */
/**
 * 登录
 * @author: Bi Kai<kai.bi@yoho.cn>
 * @date: 2016/05/09
 */
'use strict';
const _ = require('lodash');
const passport = require('passport');

const uuid = require('uuid');
const url = require('url');
const moment = require('moment');
const co = Promise.coroutine;
const cookie = global.yoho.cookie;
const helpers = global.yoho.helpers;
const log = global.yoho.logger;
const config = global.yoho.config;
const cache = global.yoho.cache;
const utils = require(global.utils);
const AuthHelperModel = require('../models/auth-helper');
const thirdAccount = require('../data/third-account.json');
const loginPage = `${config.siteUrl}/signin.html`;

function doPassportCallback(openId, nickname, sourceType, req, res) {
    let shoppingKey = cookie.getShoppingKey(req);
    let refer = req.cookies.refer;
    let from = req.cookies.from || 'yohobuy';

    if (refer) {
        refer = decodeURI(req.cookies.refer);
    } else {
        refer = `${config.siteUrl}/home`;
    }

    if (/signin|login/.test(refer)) {
        refer = `${config.siteUrl}/home`;
    }

    refer = utils.refererLimit(refer);

    if (openId && nickname) {
        return req.ctx(AuthHelperModel).signinByOpenID({
            nickname, openId, sourceType, shoppingKey, from
        }).then((result) => {
            if (result.code !== 200) {
                return Promise.reject(result);
            }
            if (result.data['is_bind'] && result.data['is_bind'] === 'N') { //eslint-disable-line
                return helpers.urlFormat('/passport/bind/index', {
                    openId: openId,
                    sourceType: sourceType,
                    refer: refer
                });
            } else if (result.code === 200 && result.data.uid) {
                return req.ctx(AuthHelperModel).syncUserSession(result.data.uid, req, res, result.data.session_key)
                    .then((authData) => {
                        return _.get(authData, 'refer') || refer;
                    });
            }
        }).then((redirectTo) => {
            return res.redirect(redirectTo);
        });
    } else {
        return Promise.reject('missing third party login openId or nickname');
    }
}

const common = {
    // 第三方登录有货逻辑
    thirdLogin(req, res, next) {
        let refer = req.get('referer');
        let thirdRefer = req.cookies.third_refer;

        if (thirdRefer && !/signin|login|passport\/international/.test(refer)) {
            res.clearCookie('third_refer', {
                domain: 'yohobuy.com'
            });
        }

        // TODO 记录token并验证有效期或者实现oauth
        if (req.query.yh_type &&
            req.query.yh_sign &&
            req.query.yh_time &&
            req.query.yh_backurl) {
            let reqTime = moment(req.query.yh_time);
            let timeDiff = moment().diff(reqTime);

            if (!reqTime.isValid() ||
                timeDiff >= 1000 * 60 * 5 || // 如果服务器之间大于5分钟验证失败
                timeDiff < 0) {

                return res.json({
                    code: 401,
                    message: 'yh_time已过期或者格式错误'
                });
            }
            let account = thirdAccount[req.query.yh_type];

            if (!account) {
                return res.json({
                    code: 401,
                    message: 'yh_type验证失败'
                });
            }
            let backurl = url.parse(req.query.yh_backurl);
            let regDomain = new RegExp(`${account.domain.replace(/\./g, '\\.')}$`);

            if (!regDomain.test(backurl.host || '')) {
                return res.json({
                    code: 401,
                    message: 'yh_backurl回调域名验证失败'
                });
            }
            let signStr = req.ctx(AuthHelperModel).thirdSign(req.query, account.clientSecret);

            if (signStr.toLowerCase() !== req.query.yh_sign.toLowerCase()) {
                return res.json({
                    code: 401,
                    message: 'yh_sign签名验证错误'
                });
            }
            res.cookie('third_refer', refer, {
                domain: 'yohobuy.com'
            });
            res.cookie('third_type', req.query.yh_type, {
                domain: 'yohobuy.com'
            });
            res.cookie('third_backurl', req.query.yh_backurl, {
                domain: 'yohobuy.com'
            });

            req.query.from = req.query.yh_type;
        }
        next();
    },
    beforeLogin: (req, res, next) => {
        if (req.session.passwordWeak) {
            return res.redirect('/passport/password/resetpage');
        }

        let refer = req.query.refer;

        if (!refer) {
            refer = req.get('Referer') || req.cookies.refer;
        }

        refer = utils.refererLimit(refer);

        refer && !/signin|login|passport/.test(refer) && res.cookie('refer', encodeURI(refer), {
            domain: 'yohobuy.com'
        });

        let from = req.query.from;

        if (from) {
            res.cookie('from', from, {
                domain: 'yohobuy.com',
                expires: new Date(Date.now() + 10 * 60 * 1000)
            });
        }

        if (req.yoho.isApp) {
            return next({
                code: 401,
                message: 'weblogin',
                refer
            });
        }
        next();
    },
    weixinCheck: (req, res, next) => {
        let passLogin = _.get(req, 'cookies._WX_PASS_LOGIN', false);

        if (req.yoho.isWechat && !passLogin) {
            return res.redirect(helpers.urlFormat('/passport/login/wechat', {
                refer: req.query.refer || req.get('Referer') || '/'
            }));
        }
        next();
    },
    clearCookie: (req, res, next) => {
        res.clearCookie('_SESSION_KEY', {
            domain: 'yohobuy.com'
        });
        res.clearCookie('_UID', {
            domain: 'yohobuy.com'
        });
        res.clearCookie('_TOKEN', {
            domain: 'yohobuy.com'
        });
        if (req.session2 && req.session2.reset) {
            req.session2.reset();
        }
        if (req.session && req.session.regenerate) {
            return req.session.regenerate(() => {
                return next();
            });
        }
    },
    isLoginUser: (req, res, next) => {
        // 微信里边已经登录的时候，不再跳转登录
        if (req.user.uid) {
            req.ctx(AuthHelperModel).profile(req.user.uid).then(function(result) {
                if (result.code !== 200) {
                    return next();
                }
                let refer = req.query.refer || decodeURI(req.cookies.refer) || config.siteUrl;

                if (/sign|login/.test(refer)) {
                    refer = `${config.siteUrl}/home`;
                }

                refer = utils.refererLimit(refer);
                return res.redirect(refer);
            }).catch(() => {
                return next();
            });
        } else {
            return next();
        }
    },
    check: (req, res, next) => {
        let refer = req.query.refer;

        // 短信推广的链接强制检查登录
        if (req.user.uid) {
            req.ctx(AuthHelperModel).profile(req.user.uid).then(function(result) {
                if (result && result.code === 200) {
                    return res.redirect(refer);
                }

                return res.redirect(helpers.urlFormat('/signin.html', {
                    refer: refer
                }));
            }).catch(() => {
                return res.redirect(helpers.urlFormat('/signin.html', {
                    refer: refer
                }));
            });
        } else {
            return res.redirect(helpers.urlFormat('/signin.html', {
                refer: refer
            }));
        }
    }
};


const local = {
    login: (req, res, next) => {
        // 是否关闭账号登录
        let closePassword = _.get(req.app.locals.wap, 'close.passwordLogin', false);

        if (closePassword) {
            return res.json({
                code: 403,
                message: '请使用快速登录'
            });
        }

        passport.authenticate('local', (err, user) => {
            if (err || !user) {
                if (err.code === 4189) {
                    let obj = {
                        code: 4189,
                        message: err || '登录出错请重试',
                        url: '//m.yohobuy.com/passport/sms_login'
                    };

                    return res.json(obj);
                } else {
                    let obj = {
                        code: 400,
                        message: err || '登录出错请重试',
                        data: '',
                        captchaShow: true
                    };

                    cache.set(`loginErrorIp:${req.yoho.clientIp}`, true, 3600 * 24).catch(log.error);
                    return res.json(obj);
                }
            } else {
                let refer = req.cookies.refer;

                if (refer) {
                    refer = decodeURI(req.cookies.refer);
                } else {
                    refer = `${config.siteUrl}/home`;
                }

                if (/sign|login/.test(refer)) {
                    refer = `${config.siteUrl}/home`;
                }

                refer = utils.refererLimit(refer);

                user.session = refer;
                user.href = refer;
                res.cookie('_LOGIN_TYPE', 0, {
                    domain: 'm.yohobuy.com'
                });


                // 弱密码返回数据
                let passwordWeakReturn;

                if (user.weakPassword) {
                    req.session.passwordWeak = user;
                    passwordWeakReturn = {
                        code: 510,
                        url: '/passport/password/resetpage',
                        pwdTip: _.get(user, 'pwdTip', '密码应为6-20位字母、数字的组合'),
                        uid: _.get(user, 'uid', '')
                    };
                }

                // 不可以跳过，不登录用户
                if (user.weakPassword && user.canSkip !== 'Y') {
                    return res.json(passwordWeakReturn);
                }

                req.ctx(AuthHelperModel).syncUserSession(user.uid, req, res, user.session_key).then((authData) => {
                    if (user.weakPassword) {
                        return res.json(passwordWeakReturn);
                    } else {
                        user.href = _.get(authData, 'refer', user.href);
                        res.json({
                            code: 200,
                            data: user
                        });
                    }
                }).catch(next);
            }
        })(req, res, next);
    },
    logout: (req, res) => {
        res.clearCookie('_SPK');
        res.cookie('_WX_PASS_LOGIN', true, {
            domain: 'm.yohobuy.com'
        });
        let refer = req.get('Referer') || config.siteUrl;

        refer = utils.refererLimit(refer);
        res.redirect(refer);
    }
};

const wechat = {
    login: (req, res, next) => {
        // 设置为原链接标识originalUrl
        req.session.originalUrl = 'true';
        req.session.authState = uuid.v4();
        res.clearCookie('_WX_PASS_LOGIN', {
            domain: 'm.yohobuy.com'
        });
        return passport.authenticate('weixin', {
            state: req.session.authState
        })(req, res, next);
    },
    callback: (req, res, next) => {
        if (req.session && req.session.authState && req.session.authState === req.query.state) {
            passport.authenticate('weixin', (err, user) => {
                if (err || !user) {
                    log.error(`wechat authenticate error : ${JSON.stringify(err)}`);
                    return res.redirect(loginPage);
                }
                let nickname = user._json.nickname || user.displayName;
                let openId = user._json.unionid || user.id;

                res.cookie('_WX_OPENID', _.get(user, '_json.openid'), {
                    domain: 'm.yohobuy.com'
                });
                res.cookie('_WX_UNIONID', _.get(user, '_json.unionid'), {
                    domain: 'm.yohobuy.com'
                });
                res.cookie('_LOGIN_TYPE', 4, {
                    domain: 'm.yohobuy.com'
                });
                doPassportCallback(openId, nickname, 'wechat', req, res).catch(next);
            })(req, res, next);
        } else {
            log.error('Auth State Mismatch:' + req.originalUrl);
            return res.redirect(loginPage);
        }
    }
};

const sina = {
    login: (req, res, next) => {
        // 设置为原链接标识originalUrl
        req.session.originalUrl = 'true';
        req.session.authState = uuid.v4();
        return passport.authenticate('sina', {
            state: req.session.authState
        })(req, res, next);
    },
    callback: (req, res, next) => {
        if (req.session && req.session.authState && req.session.authState === req.query.state) {
            passport.authenticate('sina', (err, user) => {
                if (err || !user) {
                    log.error(`sina authenticate error : ${JSON.stringify(err)}`);
                    return res.redirect(loginPage);
                }
                let nickname = user.screen_name;
                let openId = user.id;

                res.cookie('_LOGIN_TYPE', 2, {
                    domain: 'm.yohobuy.com'
                });
                doPassportCallback(openId, nickname, 'sina', req, res).catch(next);
            })(req, res, next);
        } else {
            log.error('Auth State Mismatch:' + req.originalUrl);
            return res.redirect(loginPage);
        }
    }
};

const qq = {
    login: (req, res, next) => {
        // 设置为原链接标识originalUrl
        req.session.originalUrl = 'true';
        req.session.authState = uuid.v4();
        return passport.authenticate('qq', {
            state: req.session.authState
        })(req, res, next);
    },
    callback: (req, res, next) => {
        if (req.session && req.session.authState && req.session.authState === req.query.state) {
            passport.authenticate('qq', (err, user) => {
                if (err) {
                    log.error(`qq authenticate error : ${JSON.stringify(err)}`);
                    return res.redirect(loginPage);
                }

                let nickname = user.nickname;
                let openId = user.id;

                res.cookie('_LOGIN_TYPE', 1, {
                    domain: 'm.yohobuy.com'
                });
                doPassportCallback(openId, nickname, 'qq', req, res).catch(next);
            })(req, res, next);
        } else {
            log.error('Auth State Mismatch:' + req.originalUrl);
            return res.redirect(loginPage);
        }
    }
};

const alipay = {
    login: (req, res, next) => {
        // 设置为原链接标识originalUrl
        req.session.originalUrl = 'true';
        return passport.authenticate('alipay')(req, res, next);
    },
    callback: (req, res, next) => {
        passport.authenticate('alipay', (err, user) => {
            if (err || !user) {
                log.error(`alipay authenticate error : ${JSON.stringify(err)}`);
                return res.redirect(loginPage);
            }
            let nickname = user.realName;
            let openId = user.userId;

            res.cookie('_LOGIN_TYPE', 3, {
                domain: 'm.yohobuy.com'
            });
            doPassportCallback(openId, nickname, 'alipay', req, res).catch(next);
        })(req, res, next);
    }
};

exports.user = function(req, res, next) {
    let result = {
        code: 403,
        message: '未登录',
        data: ''
    };

    if (req.user.uid) {
        result.code = 200;
        result.message = '已登录';
        result.data = req.user.uid.toString();
    }
    res.jsonp(result);
};

/**
 * 中间件
 * 根据用户登录是否成功决定是否展示验证码
 */
exports.loginShowCaptchaByIp = function(req, res, next) {
    // 总开关状态
    req.yoho.captchaShow = !_.get(req.app.locals.wap, 'close.loginValidation', false);

    // 开关打开，不走任何验证逻辑
    if (!req.yoho.captchaShow) {
        return next();
    } else {
        req.yoho.captchaShow = false;
    }

    // 第一次登录要不要展示验证码：后台开关勾选，首次登录不需要展示
    let firstLoginShowCaptcha = !_.get(req.app.locals.wap, 'close.firstLoginShowCaptcha', false);

    log.info(`firstLoginShowCaptcha status is ${firstLoginShowCaptcha}`);

    if (firstLoginShowCaptcha) {
        req.yoho.captchaShow = true;
        return next();
    } else {
        co(function* () {
            let hasErrorLog = yield cache.get(`loginErrorIp:${req.yoho.clientIp}`);

            log.info(`Pagerender clientip ${req.yoho.clientIp} status is ` + hasErrorLog);

            if (hasErrorLog) {
                req.yoho.captchaShow = true;
            }
            next();
        })().catch(function(e) {
            req.yoho.captchaShow = true;
            next();
        });
    }
};

exports.common = common;
exports.local = local;
exports.wechat = wechat;
exports.sina = sina;
exports.qq = qq;
exports.alipay = alipay;