/**
 * 404 错误
 * @return {[type]}
 */
const headerModel = require('../models/header');
const logger = global.yoho.logger;
const cache = global.yoho.cache.master;
const helpers = global.yoho.helpers;
const sender = global.yoho.apmSender;
const config = global.yoho.config;
const hostname = require('os').hostname();
const routeEncode = require('./route-encode');
const _ = require('lodash');
const limiterIpTime = 3600;

const forceNoCache = (res) => {
    if (res) {
        res.set({
            'Cache-Control': 'no-cache',
            Pragma: 'no-cache',
            Expires: (new Date(1900, 0, 1, 0, 0, 0, 0)).toUTCString()
        });
    }
};

exports.notFound = () => {
    return (req, res, next) => {
        forceNoCache(res);

        if (req.xhr) {
            return res.status(404).json({
                code: 404,
                message: '抱歉，页面不存在！'
            });
        }

        headerModel.requestHeaderData(req.yoho.channel).then((result) => {
            return res.status(404).render('error/404', {
                module: 'common',
                page: 'error',
                title: '页面不存在 | Yoho!Buy有货 | 潮流购物逛不停',
                headerData: result.headerData
            });
        }).catch(next);

    };
};

/**
 * 服务器错误
 * @return {[type]}
 */
exports.serverError = () => {
    return async(err, req, res, next) => {
        forceNoCache(res);

        const uid = req.user ? req.user.uid : 0;
        const udid = _.get(req, 'cookies.udid', 'yoho');
        let errorCode = 500;

        err = err || {
            code: 500
        };

        err.code = err.code || err.statusCode || 500;

        if (req.isApmReport && !err.apiError) { // apierror在node lib中已经上报过了 不需要再次上报
            // 上报服务端错误
            sender.addMessage({
                measurement: 'error-report',
                tags: {
                    app: global.yoho.config.appName, // 应用名称
                    hostname,
                    type: 'server',
                    route: `[${req.method}]${req.route && req.route.path}`, // 请求路由
                    reqID: req.reqID,
                    uid,
                    udid,
                    code: err.code || 500,
                    path: `[${req.method}]${routeEncode.getRouter(req)}`
                },
                fields: {
                    message: err.message,
                    stack: err.stack
                }
            });
        }

        logger.error(`error at path: ${req.url}`);
        logger.error(err);

        if (err.code === 401) {
            if (req.xhr) {
                err.data = {refer: helpers.urlFormat('/signin.html', {refer: req.get('Referer') || ''})};
                return res.json(err);
            } else {
                return res.redirect(helpers.urlFormat('/signin.html', {refer: req.fullUrl()}));
            }
        }
        if (err.code === 9999991 || err.code === 9999992) {
            let remoteIp = req.yoho.clientIp;

            const isHuman = await cache.getAsync(`${config.app}:limiter:api:ishuman:${remoteIp}`);

            if (!isHuman) {
                if (remoteIp.indexOf(',') > 0) {
                    let arr = remoteIp.split(',');

                    remoteIp = arr[0];
                }
                cache.setAsync(`${config.app}:limiter:${remoteIp}`, 1, limiterIpTime);

                let limitAPI = helpers.urlFormat('/3party/check', {refer: req.get('Referer') || ''});
                let limitPage = helpers.urlFormat('/3party/check', {
                    refer: req.protocol + '://' + req.get('host') + req.originalUrl
                });

                req.session.apiLimitValidate = true;
                if (req.xhr) {
                    return res.status(510).json({
                        code: err.code,
                        data: {refer: limitAPI}
                    });
                }

                return res.redirect(limitPage);
            }
            errorCode = 510;
        }

        if (!res.headersSent) {
            if (req.xhr) {
                return res.status(errorCode).json({
                    code: errorCode,
                    message: '服务器错误！'
                });
            }

            const renderErrPage = (result) => {
                result = result || {};

                res.status(errorCode).render(`error/${errorCode}`, {
                    module: 'common',
                    page: 'error',
                    err: err,
                    title: '服务器错误 | Yoho!Buy有货 | 潮流购物逛不停',
                    headerData: result.headerData
                });
            };

            return headerModel.requestHeaderData(req.yoho.channel).then(renderErrPage).catch(() => {
                renderErrPage();
            });
        }
        next(err);
    };
};