<?php
/*
Status codes:
0: sending
1: sent
2: failed to contact gate
3: generic error
4: no service
5: no pdu
6: radio off
7: unknown error
*/
require_once "sql.php";
if(isset($_GET['to']))
	$to = $_GET['to'];
else
	$to = "";
if(isset($_GET['gate']))
	$gate = $_GET['gate'];
else
	$gate = "";
if(isset($_GET['text']))
	$text = $_GET['text'];
else
	$text = "";
if(isset($_GET['maxWait']))
	$maxWait = $_GET['maxWait'];
else
	$maxWait = "";

if($to == "")
	error("Empty recipient");
if($text == "")
	error("Empty text");
if($gate == "")
	error("No gate provided");
if($maxWait == "")
	error("Empty max wait");

$gate = intval($gate);
if($gate <= 0)
	error("Invalid gate");
$maxWait = intval($maxWait);
if($maxWait < 0 || !is_numeric($_GET['maxWait']))
	error("Invalid max wait");

$select = $db->prepare("SELECT address, port, lastSeen FROM gates WHERE id=:gate");
if(!$select->execute(array(":gate" => $gate)))
	error("Unable to retrieve gate details");

if($g = $select->fetch())
{
	if(intval(strtotime($g['lastSeen'])) < time() - $gateTimeout)
		error("Gate is down");

	$insert = $db->prepare("INSERT INTO `sent` (`recipient`, `text`, `status`, `gate`) VALUES (:recipient, :text, :status, :gate)");
	if(!$insert->execute(array(":recipient" => $to, ":text" => $text, ":status" => 0, ":gate" => $gate)))
		error("Failed to save message");
	else
	{
		$id = intval($db->lastInsertId());
		$out = http_get("http:/"."/".$g['address'].":".$g['port']."/send.php?to=".urlencode($to)."&text=".urlencode($text)."&id=".$id,
				array("timeout" => 10, "connecttimeout" => 10));
		if($out == "")
		{
			$update = $db->prepare("UPDATE sent SET `status`=2, `timeStatus`=NOW() WHERE `id`=:id");
			if(!$update->execute(array(":id" => $id)))
				error("Failed to update database after failed to contact gate (general failure)");
			else
				echo json_encode(array("id" => $id, "status" => 2));
		}
		else
		{
			$out = json_decode(http_parse_message($out)->body);
			if(isset($out->error))
			{
				$update = $db->prepare("UPDATE sent SET `status`=7, `timeStatus`=NOW() WHERE `id`=:id");
				if(!$update->execute(array(":id" => $id)))
					error("Failed to update database after failed to contact gate (general failure)");
				else
					echo json_encode(array("id" => $id, "status" => 7, "error" => $out->error));
			}
			else
			{
				$status = 0;
				$maxWait *= 1000;
				do
				{
					$select = $db->prepare("SELECT status FROM sent WHERE id=:id");
					if($select->execute(array(":id" => $id)))
						if($f = $select->fetch())
							$status = $f['status'];
					$maxWait -= 100;
					if($maxWait > 0)
						usleep(100000);
				} while($maxWait > 0 && $status == 0);
				echo json_encode(array("id" => $id, "status" => $status));
			}
		}
	}
}
else
	error("Gate not found");
?>