<?php  
$page_title = 'Import Exam Result';
include 'header.php';
$agent_id = $userData['id'];
$role = $userData['user_type'];
?>
<div class="content-wrapper">
	<section class="content mt-4">
		<div class="container-fluid">
			<div class="row">
				<div class="col-md-12">
					<?php include('alert-msg.php'); ?>
					<div class="card card-primary">
						<div class="card-header">
							<h3 class="card-title"><?php echo $page_title; ?></h3>
						</div>
						<form action="" method="POST" enctype="multipart/form-data">
							<div class="card-body">
								<div class="row">
									<div class="col-md-4">
										<div class="form-group">
											<label for="exampleInputFile">Upload Excel File</label>
											<a href="downloads/exam_result_import.csv" download="exam_result_import.csv">CSV Format File Format</a>
											<div class="input-group">
												<div class="custom-file">
													<input type="file" class="custom-file-input" name="upload_format" accept=".csv" id="exampleInputFile" required>
													<label class="custom-file-label" for="exampleInputFile">Choose file</label>
												</div>
											</div>
										</div>
									</div>
								</div>
								<button type="submit" class="btn btn-primary" name="btnSubmit">Submit</button>
							</div>
						</form>
					</div>
				</div>
			</div>
		</div>
	</section>
</div>
<?php include 'footer.php'; ?>


<?php
if(isset($_POST['btnSubmit']))
{
	$filename=$_FILES["upload_format"]["tmp_name"];
	if($_FILES["upload_format"]["size"] > 0)
	{
		$file = fopen($filename, "r");
		$row_count=0;
		$subjectIdsData = [];
		$rs_update = 0;
		$rs_add = 0;
		$rs_failed = 0;
		while (($emapData = fgetcsv($file, 10000, ",")) !== FALSE)
		{
			if($row_count>0)
			{
				$exam_id = $emapData[0];
				$year = $emapData[1];
				$stud_id = $emapData[2];
				
				for($i = 8; $i < count($emapData); $i++) {
				    $subArray = explode('(', $subjectIdsData[$i]);
				    $sub_id = isset($subArray[1]) ? str_replace(')', '', trim($subArray[1])) : '';
				    $ex = 0;
				    
				    $value = $emapData[$i];
				    
				    $sel_result = mysqli_query($con, "select Obtain_Makrs from FactExamresults_Table where Year = '$year' and Student_ID = '$stud_id' and Exam_id = '$exam_id' and Subject_Id = '$sub_id'");
                    if(mysqli_num_rows($sel_result) > 0) {
                        $upd = mysqli_query($con, "update FactExamresults_Table set Obtain_Makrs = '$value' where Year = '$year' and Student_ID = '$stud_id' and Exam_id = '$exam_id' and Subject_Id = '$sub_id'");
                        if($upd) {
                            $ex = 1;
                            $rs_update = $rs_update + 1;
                        }
                    }
                    else {
                        $ins = mysqli_query($con, "INSERT INTO `FactExamresults_Table`(`Year`, `Student_ID`, `Exam_id`, `Subject_Id`, `Obtain_Makrs`) VALUES ('$year','$stud_id','$exam_id','$sub_id','$value')");
                        if($ins) {
                            $ex = 1;
                            $rs_add = $rs_add + 1;
                        }
                    }
                    
                    if($ex == 0) {
                        $rs_failed = $rs_failed + 1;
                    }
				}
			}
			else {
			    for($i = 8; $i < count($emapData); $i++) {
			        $subjectIdsData[$i] = $emapData[$i];
				}
			}
			$row_count = $row_count + 1;
		}
		
        $message = "Import Summary:\n";
        $message .= "✔️ Records Added: $rs_add\n";
        $message .= "♻️ Records Updated: $rs_update\n";
        $message .= "❌ Records Failed: $rs_failed";
        
        echo nl2br($message);
		$_SESSION['success_msg'] = $message;
		echo"<script>window.location='import-exam-result.php';</script>";
	}
	else
	{
		$_SESSION['error_msg'] = 'There is no any record found in uploaded csv file...';
		echo"<script>window.location='import-exam-result.php';</script>";
	}

}
?>