var appEnv = process.env.APP_ENV;
if (appEnv == undefined) {
    appEnv = 'development';
}
const isProduction = appEnv === 'production',
    chalk = require('chalk'),
    utils = require('../routes/utils');

const exceptionHandler = {
    notFoundErrorHandler: (req, res, next) => {
        let err = new Error('Not Found');
        err.status = 404;
        console.log(`${utils.getDateTimeISOString()}`, chalk.yellow(`${err.status} ${err.message}`));
        next(err);
    },
    logErrorHandler: (err, req, res, next) => {
        console.log(`${utils.getDateTimeISOString()}`, chalk.red(`error handler : ${err.message} ${err.err}`));
        console.error(err.stack);
        next(err);
    },
    clientErrorHandler: (err, req, res, next) => {
        if (req.xhr) {
            res.status(err.status || 500);
        } else {
            next(err);
        }
    },
    // eslint-disable-next-line no-unused-vars
    fianlErrorHandler: (err, req, res, next) => {
        res.status(err.status || 500);
        if (!isProduction) {
            /* development error handler will print stacktrace */
            res.json({errors: {
                message: err.message,
                error: err.err,
                stack: err.stack
            }});
        } else {
            /* production error handler no stacktraces leaked to user */
            res.json({errors: {
                message: err.message,
                error: {},
                stack: {}
            }});
        }
    }
};

module.exports = exceptionHandler;