'use strict';

exports = module.exports = {
    proxy,
    restart,

    getLocation,
    setLocation
};

const assert = require('assert'),
    auditSource = require('../auditsource.js'),
    BoxError = require('../boxerror.js'),
    debug = require('debug')('box:routes/mailserver'),
    HttpError = require('connect-lastmile').HttpError,
    HttpSuccess = require('connect-lastmile').HttpSuccess,
    mail = require('../mail.js'),
    middleware = require('../middleware/index.js'),
    services = require('../services.js'),
    url = require('url');

function restart(req, res, next) {
    mail.restartMail((error) => debug('Error restarting mail container', error));
    next();
}

function proxy(req, res, next) {
    let parsedUrl = url.parse(req.url, true /* parseQueryString */);
    const pathname = req.path.split('/').pop();

    // do not proxy protected values
    delete parsedUrl.query['access_token'];
    delete req.headers['authorization'];
    delete req.headers['cookies'];

    services.getContainerDetails('mail', 'CLOUDRON_MAIL_TOKEN', function (error, addonDetails) {
        if (error) return next(BoxError.toHttpError(error));

        parsedUrl.query['access_token'] = addonDetails.token;
        req.url = url.format({ pathname: pathname, query: parsedUrl.query });

        const proxyOptions = url.parse(`https://${addonDetails.ip}:3000`);
        proxyOptions.rejectUnauthorized = false;
        const mailserverProxy = middleware.proxy(proxyOptions);

        req.clearTimeout(); // TODO: add timeout to mail server proxy logic instead of this
        mailserverProxy(req, res, function (error) {
            if (!error) return next();

            if (error.code === 'ECONNREFUSED') return next(new HttpError(424, 'Unable to connect to mail server'));
            if (error.code === 'ECONNRESET') return next(new HttpError(424, 'Unable to query mail server'));

            next(new HttpError(500, error));
        });
    });
}

function getLocation(req, res, next) {
    mail.getLocation(function (error, result) {
        if (error) return next(BoxError.toHttpError(error));

        next(new HttpSuccess(200, { domain: result.domain, subdomain: result.subdomain }));
    });
}

function setLocation(req, res, next) {
    assert.strictEqual(typeof req.body, 'object');

    if (typeof req.body.domain !== 'string') return next(new HttpError(400, 'domain must be a string'));
    if (typeof req.body.subdomain !== 'string') return next(new HttpError(400, 'subdomain must be a string'));

    mail.setLocation(req.body.subdomain, req.body.domain, auditSource.fromRequest(req), function (error, taskId) {
        if (error) return next(BoxError.toHttpError(error));

        next(new HttpSuccess(202, { taskId }));
    });
}