'use strict';

var assert = require('assert'),
    debug = require('debug')('e2e:mailer'),
    fs = require('fs'),
    path = require('path'),
    postmark = require('postmark')(process.env.POSTMARK_API_KEY_TOOLS),
    util = require('util');

exports = module.exports = {
    sendMailToCloudronUser: sendMailToCloudronUser,
    sendEndToEndTestResult: sendEndToEndTestResult
};

function send(options, callback) {
    assert.strictEqual(typeof options, 'object');
    assert.strictEqual(typeof options.to, 'string');
    assert.strictEqual(typeof options.subject, 'string');
    assert.strictEqual(typeof options.text, 'string');

    debug('Sending email from %s to %s with subject "%s".', options.from, options.to, options.subject);

    postmark.send({
        'From': options.from || 'no-reply@cloudron.io',
        'To': options.to,
        'Bcc': options.bcc,
        'Subject': options.subject,
        'TextBody': options.text,
        'HtmlBody': options.html,
        'Tag': 'Important',
        'Attachments': options.attachments || []
    }, function (error, success) {
        if (error) {
            console.error('Unable to send via postmark: ', error);
            return callback(error);
        }

        callback();
    });
}

function sendEndToEndTestResult(topic, versionInfo, stdout, stderr, attachmentFolder, callback) {
    debug('Sending e2e test result for %s', topic);

    debug('Creating attachements from folder ', attachmentFolder);
    fs.readdir(attachmentFolder, function (error, files) {
        var attachments = [];

        if (!error) {
            attachments = files.filter(function (file) {
                return fs.statSync(path.join(attachmentFolder, file)).isFile();
            }).map(function (file) {
                var filePath = path.join(attachmentFolder, file);

                return {
                    Content: fs.readFileSync(filePath).toString('base64'),
                    Name: file,
                    ContentType: 'text/plain'
                };
            });
        } else {
            debug('Error reading attachment directory: ', error);
        }

        var mailOptions = {
            to: 'test@cloudron.io',
            subject: util.format('E2E test results for %s', topic),
            text: versionInfo + '\n\nstdout\n------\n' + stdout.toString('utf8') + '\n\nstderr\n------\n' + stderr.toString('utf8') + '\n\n',
            attachments: attachments
        };

        send(mailOptions, callback);
    });
}

function sendMailToCloudronUser(email, callback) {
    debug('Sending test mail to %s', email);

    var mailOptions = {
        to: email,
        subject: 'Hi from e2e test - ' + email.split('@')[1],
        text: 'This release depends on you!' // match this with cloudron.sendMail
    };

    send(mailOptions, callback);
}