var http   = require('http');
var linode = require('linode-api');

var my_api_key    = '';
var domain_id     = 0;
var resource_id   = 0;

var linode_client = new (linode.LinodeClient)(my_api_key);

var options = {
    host   : 'jsonip.com',
    port   : 80,
    path   : '/',
    method : 'GET'
};

var req = http.request(options, function(res) {

    res.on('data', function(chunk) {

        var response_obj = JSON.parse('' + chunk);
        var current_ip   = response_obj.ip;

        console.log (current_ip);

        var linode_params = {
            domainid   : domain_id,
            resourceid : resource_id
        };

        console.log('Looking up last known IP...');

        // lookup previous value, so we know if we should send the update
        linode_client.call('domain.resource.list', linode_params, function(err, lookup_res) {

            var last_ip = lookup_res[0].TARGET;

            console.log(last_ip);

            if (last_ip != current_ip) {

                console.log('DNS is stale. Updating now...');

                linode_params.target = current_ip;
                linode_client.call('domain.resource.update', linode_params, function (err, update_res) {
                        if (err) throw err;
                        console.log(update_res);
                });

            } else {

                console.log('DNS is up to date');
            }
        });

    });

});


console.log('Looking up current IP...')

req.end();