var appEnv = process.env.APP_ENV;
if (appEnv == undefined) {
    appEnv = 'development';
}
require('dotenv').config({ path: `config/env/.env.${appEnv}` });

const { promisify } = require('util'),
    chalk = require('chalk'),
    morgan = require('morgan');

const DateUtilities = require('./src/utils/dateUtilities'),
    exceptionHandler = require('./src/middlewares/exceptions.handler'),
    connectDb = require('./src/database/connectDb'),
    config = require('./src/config'),
    createApp = require('./src/createApp');

const app = createApp();

// Morgan status code color config
morgan.token('statusColor', (req, res) => {
    const status = (typeof res.headersSent !== 'boolean' ? Boolean(res.header) : res.headersSent)
        ? res.statusCode
        : undefined;
    return status >= 500 ? chalk.red(status)
        : status >= 429 ? chalk.magenta(status)
            : status >= 400 ? chalk.yellow(status)
                : status >= 300 ? chalk.cyan(status)
                    : status >= 200 ? chalk.green(status)
                        : chalk.underline(status);
});
app.use(morgan('[:date[iso]] ":method :url HTTP/:http-version" :statusColor :res[content-length] ":referrer" ":user-agent" :remote-addr'));

require('./src/database/models/mongo');
config.initAuth();

const setupRoutes = (app) => {
    app.use(require('./src/routes'));
    app.use(exceptionHandler.notFoundErrorHandler);
    app.use(exceptionHandler.logErrorHandler);
    app.use(exceptionHandler.fianlErrorHandler);
};

const startServer = async () => {
    try {
        await connectDb.connectAllDb();
        console.log(`${DateUtilities.getDateTimeISOString()}`, chalk.green('All database connections established, relationships loaded'));

        setupRoutes(app);

        const port = process.env.SERVER_PORT || 3200;
        await promisify(app.listen).bind(app)(port);
        console.log(`${DateUtilities.getDateTimeISOString()}`, chalk.green(`${appEnv} API server listening on port ${port}`));
    } catch (error) {
        console.error(`${DateUtilities.getDateTimeISOString()}`, chalk.red('Failed to start server:'), error);
        process.exit(1);
    }
};

startServer();