<?php

include '../includes/core.php';

$go=false;
if (isset($_REQUEST['go'])) {
	$go=$_REQUEST['go'];
}
logging('DEBUG',"Request (Go : $go) : ".print_r($_REQUEST,1));

$post_body=file_get_contents('php://input');
if ($post_body) {
	$post_body=json_decode($post_body, true);
	if(!is_array($post_body)) $post_body=false;
}
else {
	$post_body=false;
}
logging('DEBUG','POST Body : '.print_r($post_body,1));

$data=array();
switch($go) {
	case 'send_sms':
		$result = send_sms($_REQUEST['number'], $_REQUEST['text']);
		if ($result[0] == 'error') {
			$data['status']='error';
			$data['msg']=$result[1];
		}
		else {
			$data['status']=$result[0];
			$data['uuid']=$result[1];
		}
	break;
	case 'ack':
		/*
		Post body example : Array (
			[id] => 1510702925705
			[state] => Delivered
			[frag] => 0
			[text] => qsdmlkqsdmlqskdmqlksdmqlsdkmqlsdqsdmlkqsdmlqskdmqlksdmqlsdkmqlsdqsdmlkqsdmlqskdmqlksdmqlsdkmqlsdqsdmlkqsdmlqskdmqlksdmqlsdkmqlsdqsdmlkqsdmlqskdmqlksdmqls
		)
		*/
		if (is_array($post_body) && check_integer($post_body['id']) && check_integer($post_body['frag']) && check_frag_state($post_body['state'])) {
			logging('INFO','Ack for message '.$post_body['id'].' (Frag : '.$post_body['frag'].') with status '.$post_body['state']);
			$msg=get_outgoing_msg_by_uniqueid($post_body['id']);
			if (is_array($msg)) {
				logging('INFO',"Corresponding outgoing msg : ".$msg['uuid']);
				logging('DEBUG',"Outgoing msg : ".print_r($msg,1));
				if (update_outgoing_msg_frag($post_body['id'], $post_body['frag'], strtolower($post_body['state']))===True) {
					$msg_status=get_outgoing_msg_status_from_frags($msg);
					if ($msg_status!=$mgs['status'] && update_outgoing_msg_status($msg['uuid'], $msg_status)==-1) {
						$data['status']='error';
						$data['msg']='Error updating outgoing msg status';
					}
					else {
						$data['status']='ok';
					}
				}
				else {
					$data['status']='error';
					$data['msg']='Fail to update outgoing msg frag';
				}
			}
			else {
				$data['status']='error';
				$data['msg']='Outgoing message not found';
			}
		}
		else {
			$data['status']='error';
			$data['msg']='Invalid parameters';
		}
	break;
	case 'incoming':
		/*
		Post body example : Array (
			[number] => +33612345678
			[text] => qsdmlkqsdmlqskdmqlksd
			[timestampMillis] => 1510702926820
		)
		*/
		if (is_array($post_body) && check_phone_number($post_body['number']) && check_sms_text($post_body['text']) && check_integer($post_body['timestampMillis'])) {
			logging('INFO','Incoming SMS from '.$post_body['number']);
			$uuid=create_incoming_msg($post_body['number'], $post_body['text'], $post_body['timestampMillis']);
			if (check_uuid($uuid)) {
				if(handle_incoming_msg($uuid)===True) {
					$data['status']='delivered';
				}
				else {
					$data['status']='pending';
				}
			}
			else {
				$data['status']='error';
				$data['msg']='Error creating your incoming message';
			}
		}
		else {
			$data['status']='error';
			$data['msg']='Invalid parameters';
		}
		
	break;
	case 'smsq':
		$data['messages']=get_smsq();
		logging('DEBUG','SMSQ : '.print_r($data['messages'],1));
	break;
	case 'check_gateway':
		$data['status']=($smsgw->check_gateway()?'alive':'not responding');
		logging('DEBUG','SMS Gateway Status : '.$data['status']);
	break;
	case '':
		print "Welcome on SMS Gateway WebService";
		exit();
	break;
	default:
		$data['status']='error';
		$data['msg']='Invalid request';
}
print json_encode($data, (isset($_REQUEST['pretty'])?JSON_PRETTY_PRINT:0));