const config = require('../config.json');
const logger = require('../libs/logger.js');
const commands = require('../libs/commands.js');
const http = require('http');

var server;
var api;

function start(callback) {
    buildAPI();
    if (!server) {
        server = http.createServer();
    }
    server.listen(config.server.port, config.server.listen)
        .on('listening', function () {
            logger.debug('server listening on ' + config.server.listen + ':' + config.server.port + '...');
            handleRequests();
        });
}

function handleRequests() {
    server.on('request', function (request, response) {
        logger.request(request);
        var endpoint = api.get(request.url);
        if (!endpoint) {
            response.writeHead(501);
            response.end('endpoint not defined\n');
            return;
        }
        if (request.method.toLowerCase() != (endpoint.type.toLowerCase())) {
            response.writeHead(405);
            response.end('endpoint does not support ' + request.method + ' requests\n');
            return;
        }
        commands.execute(endpoint);
        response.end();
    });
}

function buildAPI(callback) {
    if (!config.api) {
        logger.warn('no api defined');
    }
    api = new Map();
    config.api.forEach(function(endpoint) {
        var url = endpoint.url;
        var tmp = endpoint;
        delete tmp.url;
        api.set(url, tmp);
    });
}

module.exports = {
    start
}