let loopback = require('loopback');
let boot = require('loopback-boot');
let path = require('path');
let fs = require('fs');
let i18n = require('i18n');

module.exports = {
    loopback: loopback,
    boot: vnBoot
};

function vnBoot(app, rootDir, rootModule) {
    // Internationalization

    let localeDir = `${__dirname}/../common/locale`;

    if (fs.existsSync(localeDir)) {
        i18n.configure({
            directory: localeDir,
            defaultLocale: 'es'
        });

        app.use(i18n.init);
    }

    // View

    let viewDir = `${rootDir}/../client`;

    if (fs.existsSync(viewDir)) {
        app.set('view engine', 'ejs');
        app.set('views', viewDir);
        app.use(loopback.static(path.resolve(rootDir, '../client')));
    }

    // Initialization

    app.start = function(port) {
        function onListen() {
            app.emit('started');

            if (require.main === rootModule) {
                let packageJson = require(`${rootDir}/../package.json`);
                let appName = packageJson.name;
                let baseUrl = app.get('url').replace(/\/$/, '');
                console.log(`Web server ${appName} listening at: %s`, baseUrl);
            }
        }

        let args = port ? [port, onListen] : [onListen];
        return app.listen.apply(app, args);
    };

    let config = require('./config.json');

    for (let key in config) {
        app.set(key, config[key]);
    }

    let modelConfigFiles = [
        `${__dirname}/model-config.json`,
        `${rootDir}/model-config.json`
    ];

    let modelConfig = {};

    for (file of modelConfigFiles)
        if (fs.existsSync(file))
            Object.assign(modelConfig, require(file));

    let bootOptions = {
        appRootDir: __dirname,
        appConfigRootDir: rootDir,
        modelsRootDir: rootDir,
        models: modelConfig,
        modelSources: [
            `loopback/common/models`,
            `loopback/server/models`,
            `${__dirname}/../common/models`,
            `${rootDir}/../common/models`
        ],
        mixinDirs: [
            `loopback/common/mixins`,
            `loopback/server/mixins`,
            `${__dirname}/../common/mixins`,
            `${rootDir}/../common/mixins`
        ],
        bootDirs: [
            `${__dirname}/boot`,
            `${rootDir}/boot`
        ]
    };

    boot(app, bootOptions, function(err) {
        if (err) throw err;
        if (require.main === rootModule)
            app.start();
    });
}