var appEnv = process.env.APP_ENV;
if (appEnv == undefined) {
    appEnv = 'development';
}
require('dotenv').config({ path: `.env.${appEnv}` });
const { promisify } = require('util'),
    bodyParser = require('body-parser'),
    chalk = require('chalk'),
    utils = require('./routes/utils');
var express = require('express'),
    session = require('express-session'),
    cors = require('cors'),
    errorhandler = require('errorhandler'),
    mongoose = require('mongoose'),
    morgan = require('morgan');

var isProduction = appEnv === 'production';

// Create global app object
var app = express();

app.use(cors());

// Normal express config defaults
//app.use(morgan('combined'));
morgan.token('statusColor', (req, res, args) => {
    var 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'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.use(require('method-override')());
app.use(express.static(__dirname + '/public'));

app.use(session({ secret: 'acapisecret', cookie: { maxAge: 60000 }, resave: false, saveUninitialized: false  }));

if (!isProduction) {
    app.use(errorhandler());
}

if(isProduction){
    mongoose.connect(process.env.MONGODB_URI);
} else {
    mongoose.set('strictQuery', true);
    mongoose.connect(process.env.MONGODB_URI).then(() => {
        console.log(`${utils.getDateTimeISOString()}`, chalk.green('MongoDB connection has been established successfully'));
    }).catch(() => {
        console.log(`${utils.getDateTimeISOString()}`, chalk.red('Unable to connect to the MongoDB database'));
    });
    mongoose.set('debug', process.env.DEBUG);
}
require('./models/mongo/User');
require('./models/mongo/Application');
require('./models/mongo/Aeronef');
require('./models/mongo/Canopy');
require('./models/mongo/Dropzone');
require('./models/mongo/Jump');
/*
require('./models/mongo/Metal');
require('./models/mongo/Price');
require('./models/mongo/Product');
*/
require('./config/passport');

app.use(require('./routes'));

/// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

/// error handlers

// development error handler
// will print stacktrace
if (!isProduction) {
    app.use(function(err, req, res, next) {
        console.log(`${utils.getDateTimeISOString()}`, chalk.red(`error handler : ${err.message} ${err.err}`));
        res.status(err.status || 500);
        res.json({errors: {
            message: err.message,
            error: err.err,
            stack: err.stack
        }});
    });
} else {
    // production error handler
    // no stacktraces leaked to user
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.json({errors: {
            message: err.message,
            error: {},
            stack: {}
        }});
    });
}

const startServer = async () => {
    const port = process.env.SERVER_PORT || 3200;
    await promisify(app.listen).bind(app)(port);
    console.log(`${utils.getDateTimeISOString()}`, chalk.green(`${process.env.APP_ENV} API server listening on port ${port}`));
}

// finally, let's start our server...
startServer();