//Various settings.
var Client = require('mysql').Client;
    client = new Client();
    TEST_DATABASE = 't_voice';
    TEST_TABLE = 't_calls';
client.host = 'database.domain.com';
client.user = 'auser';
client.password = 'apassword';
client.connect();
client.query('USE '+TEST_DATABASE);
console.log("Looking for expired calls...");

//Kill function, make REST call to kill call and update the database.
function tropoKill(cs){
        console.log("Killing call: "+cs);
        var http = require('http')
        var SESSIONID = cs;
        var options = {
          host: 'api.tropo.com',
          port: 80,
          path: '/1.0/sessions/'+SESSIONID+'/signals?action=signal&value=exit'
        };
        var req = http.get(options, function(res) {
            res.on('data', function (chunk) {
                if(chunk=='<signal><status>QUEUED</status></signal>'){
                        console.log("Hung up...");
                        var a = client.query(
                                'UPDATE t_calls SET endDateTime = ? WHERE callSession = ?',['1000-00-00 00:00:00',cs], function (error, results) {
                        })
                }else if(chunk=='<signal><status>NOTFOUND</status></signal>'){
                        console.log("Already Gone...");
                        var a = client.query(
                                'UPDATE t_calls SET endDateTime = ? WHERE callSession = ?',['1000-00-00 00:00:00',cs], function (error, results) {
                });

                }
                req.end();
            });
        }).on('error', function(e) {
        console.log("Got error: " + e.message);
        req.end();
        });

};
//--------MAIN FUNCTION
//Every second query database to look for expired records, iterate each record and kill the session and update the record.
setInterval(function() {
var a = client.query(
  'SELECT * FROM '+TEST_TABLE+' '+
  'WHERE ttl <= UTC_TIMESTAMP() AND endDateTime = ?',['0000-00-00 00:00:00'], function (error, results) {
    if (error) {
      throw err;
    }
    if(results.length > 0)
      {
          for(var i in results){
          tropoKill(results[i]['callSession']);
          }
      };


  });
}, 1000)