<?php

	require_once 'config.php';
	require_once 'dbh.inc.php';
	require_once 'checkLogin.php';
	
	
	// EXAMPLE INPUT...
	// array(4) { ["momentID"]=> string(3) "137" ["newTitle"]=> string(18) "saludos de saludos" ["newDescription"]=> string(18) "saludos de saludos" ["updateMoment"]=> string(0) "" }


	if(isset($_POST['updateMoment'])) {
		

		$momentID = mysqli_real_escape_string($connection, trim($_POST['momentID']));
		
		// Check that moment ID is not empty string
		// And that it's registered in the database
		if($momentID === "") {
			http_response_code(400);
			echo json_encode(array("error" => "Please specify moment ID."));
			exit();
		} else if(mysqli_query($connection, "SELECT * FROM subquestionnair WHERE id = '$momentID';")->num_rows !== 1) {
			http_response_code(400);
			echo json_encode(array("error" => "Given moment ID ($momentID) not in database."));
			exit();
		}


		// UPDATE TITLE
		if(isset($_POST['newTitle'])) {
		
			$newTitle = mysqli_real_escape_string($connection, trim($_POST['newTitle']));
			
			// Check that moment title is not empty
			// And that it's less than 60 characters in length (database limit)
			if($newTitle === "") {
				http_response_code(400);
				echo json_encode(array("error" => "Please specify title."));
				exit();
			} else if(mb_strlen($newTitle) > 60) {
				http_response_code(400);
				echo json_encode(array("error" => "Title too long (max. is 60 characters)."));
				exit();
			}
			
			$query = "UPDATE `subquestionnair` SET `title` = '$newTitle' WHERE `id` = '$momentID';";
			$result = mysqli_query($connection, $query) or die("Error: ".mysqli_error($connection));
            
		}
		
		
		// UPDATE DESCRIPTION
		if(isset($_POST['newDescription'])) {
		
			$newDescription = mysqli_real_escape_string($connection, trim($_POST['newDescription']));
			
			// Check that moment description is not empty
			// And that it's less than 100 characters in length (database limit)
			if($newDescription === "") {
				http_response_code(400);
				echo json_encode(array("error" => "Please specify description."));
				exit();
			} else if(mb_strlen($newDescription) > 100) {
				http_response_code(400);
				echo json_encode(array("error" => "Description too long (max. is 100 characters)."));
				exit();
			}
			
			$query = "UPDATE `subquestionnair` SET `description` = '$newDescription' WHERE `id` = '$momentID';";
			$result = mysqli_query($connection, $query) or die("Error: ".mysqli_error($connection));
            
		}
		
	
		if(isset($_POST['newDate'])) {
		
			$momentDate = mysqli_real_escape_string($connection, trim($_POST['newDate']));
			
			// Check that momentDate is not an empty string
			// And that momentDate is in appropriate format YYYY-MM-DDThh:mm (e.g. 121212-12-12T12:12)
			// WARNING: only handling AST
			// HELP: https://www.codexworld.com/how-to/validate-date-input-string-in-php/
			
			function validDate($date) {
				$d = date_create_from_format("Y-m-d\TH:i", $date);
				return $d && date_format($d, "Y-m-d\TH:i") === $date;
			}
			
			if($momentDate === "") {
				http_response_code(400);
				echo json_encode(array("error" => "Please specify moment date."));
				exit();
			} else if(!validDate($momentDate)) {
				http_response_code(400);
				echo json_encode(array("error" => "Moment date ($momentDate) given in wrong format (use YYYY-MM-DDTHH:mm instead)."));
				exit();
			}

			$queryMoment = 
			"UPDATE subquestionnair
			SET date_to_administer = '$momentDate'
			WHERE id = '$momentID';";
	
			if(!mysqli_query($connection, $queryMoment)) {
				http_response_code(400);
				echo json_encode(array("error" => "Couldn't update moment date. ".mysqli_error($connection)));
			}
			
			
		}

		
	}