<?php
session_start();
error_reporting('0');
if(isset($_SESSION['teacher'])){
$username = $_SESSION['teacher'];
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <style>
        .card-title a {
            font-size: 16px;
            border-bottom: 1px solid #707478;
            color: #707478;
        }
        .card-title a:hover{
            border-bottom: 1px solid #1A2229;
            color: #1A2229;
        }
        .btn-app:first-child{
            margin-left:0 !important;
        }
    </style>


    <?php include '../admin/includes/styles.php'; ?>
    <title>Students Attendance |  <?php echo $school_name; ?> </title>

</head>
<body class="hold-transition sidebar-mini layout-fixed">
<div class="wrapper">

    <!-- Navbar -->
    <?php include 'includes/notifications.php'; ?>
    <!-- /.navbar -->

    <!-- Main Sidebar Container -->
    <?php
    include "includes/sidebar.php";
    $sql = "SELECT * FROM teachers WHERE username =:username";
    $conn->query($sql);
    $conn->bind(":username", $username);

    $result = $conn->fetchSingle();
    $teacher_name = $result->name;
    ?>

    <!-- Content Wrapper. Contains page content -->
    <div class="content-wrapper">
        <!-- Content Header (Page header) -->
        <div class="content-header">
            <div class="container-fluid">
                <div class="row mb-2">
                    <div class="col-sm-6">
                        <h1 class="m-0">Attendance</h1>
                    </div><!-- /.col -->
                    <div class="col-sm-6">
                        <ol class="breadcrumb float-sm-right">
                            <li class="breadcrumb-item"><a href="<?php echo $conn->teacher_url(); ?>">Home</a></li>
                            <li class="breadcrumb-item active">attendance</li>
                        </ol>
                    </div><!-- /.col -->
                </div><!-- /.row -->
            </div><!-- /.container-fluid -->
        </div>
        <!-- /.content-header -->

        <!-- Main content -->
        <section class="content">
            <div class="container-fluid">

                <div class="row">
                    <!--          <section class="col-lg-12 connectedSortable">-->
                    <!--           <a href="add-class"><button class="btn btn-outline-success">Add a class</button></a>-->
                    <!--          </section>-->
                    <section class="col-lg-12 connectedSortable">
                        <div class="card">
                            <div class="card-header" style="background: #17a2b8; color: white;">
                                <h3 class="card-title" style="font-size: 15px;"> <i class="fa fa-star"></i> Manage Attendance </h3>
                            </div>
                            <div class="card-header">
                                <h3 class="card-title"><a href="<?php echo $conn->teacher_url().'add-attendance'; ?>"> <i class="fa fa-plus"></i> Add attendance </a> </h3>
                            </div>
                            <!-- /.card-header -->
                            <div class="card-body">
                                <h3 class="card-title text-center" style="font-size: 15px;"> Please select a class to view the students' attendance <i class="fa fa-info-circle" data-toggle="tooltip" title="N.B: Only classes with attendance added are clickable. This is not a daily attendance manager. This is the number of attendance of a student per term." style="cursor:pointer;"></i></h3>
                                <br><br>
                                <div>
                                    <?php

                                    $sql = "SELECT *  FROM classes WHERE teacher_name =:name";
                                    $conn->query($sql);
                                    $conn->bind(":name", $teacher_name);
                                    $result = $conn->fetchMultiple();
                                    $n = 0;
                                    foreach ($result as $class){
                                        $class_name = $class->name;
                                        $class_id = $class->id;
                                        //badge color array
                                        $badge_color = array('bg-success', 'bg-purple', 'bg-warning', 'bg-info', 'bg-danger', 'bg-teal', 'bg-primary');
                                        //fetch available section in class
                                        $sql = "SELECT COUNT(id) FROM attendance WHERE class =:class_id AND attendance !=''";
                                        $conn->query($sql);
                                        $conn->bind(":class_id", $class_name);
                                        $attendance_available = $conn->fetchColumn();
                                        //enable or disable link on number of available sections  href="section/<?php echo $class_id;
                                        $slugify_class_name = $conn->slugify($class_name);
                                        $link = $teacher_url  ."attendance/$slugify_class_name";
                                        ?>
                                        <a class="btn btn-app" style="min-width: 120px; height: 90px;" <?php if($attendance_available != 0){echo "href='$link'";}?>>
                                            <span class="badge <?php echo $badge_color[$n]; ?>" data-toggle="tooltip" title="<?php echo $attendance_available ?> attendance(s) entered in class <?php echo $class_name; ?>"><?php echo $attendance_available ?></span>
                                            <i class="fas fa-users" style="font-size: 50px;"></i> <?php echo ucwords(str_replace('-', ' ', $class_name)); ?>
                                        </a>
                                        <?php
                                        $n++;

                                    }
                                    ?>

                                </div>
                                <?php
                                //display selected section below
                                if(isset($_GET['class_name'])){
                                    $class_name = $_GET['class_name'];
                                    $new_class_name = str_replace('-', ' ', $class_name);
                                    $sql = "SELECT *  FROM attendance WHERE class =:class_name AND attendance !=''";
                                    $conn->query($sql);
                                    $conn->bind(":class_name", $new_class_name);
                                    $result_details = $conn->fetchMultiple();

                                    ?>
                                    <div class="card-header" style="background: #c3570f; color: white; margin: 20px 0 2px;">
                                        <h3 class="card-title" style="font-size: 17px;"> <i class="fa fa-star"></i> Viewing Students attendance details for class <?php echo $new_class_name; ?></h3>
                                    </div>
                                    <table id="teacher" class="table table-bordered table-striped">
                                        <thead>
                                        <tr>
                                            <th>#</th>
                                            <th>Photo</th>
                                            <th>Name</th>
                                            <th>Class</th>
                                            <th>Section</th>
                                            <th>Exam</th>
                                            <th>Exam Year</th>
                                            <th>No of Attendance</th>
                                            <th>Action</th>
                                        </tr>
                                        </thead>
                                        <tbody>
                                        <?php
                                        $i = 1;
                                        if($conn->rowCount()){
                                            foreach ($result_details as $student_details):
                                                $name = $student_details->student_name;
                                                $class = $student_details->class;
                                                $attendance_id = $student_details->id;
                                                $section = $student_details->section;
                                                $exam = $student_details->exam;
                                                $exam_year = $student_details->exam_year;
                                                $attendance = $student_details->attendance;
                                                //fetch student section

                                                $sql = "SELECT photo FROM student WHERE name =:name";
                                                $conn->query($sql);
                                                $conn->bind(":name", $name);
                                                $photo = $conn->fetchColumn();
                                                ?>
                                                <tr>
                                                    <td><?php echo $i++; ?></td>
                                                    <td>
                                                        <?php
                                                        if(empty($photo)){
                                                            ?> <img src="<?php echo $base_url?>images/default.png" alt="default" width="48" height="48"><?php
                                                        }else{
                                                            ?> <img src="<?php echo $base_url?>upload/<?php echo $photo;?>" alt="photo" width="48" height="48"><?php
                                                        }
                                                        ?>
                                                    </td>
                                                    <td><?php echo $name;?></td>
                                                    <td><?php echo $class;?></td>
                                                    <td><?php echo $section;?></td>
                                                    <td><?php echo $exam;?></td>
                                                    <td><?php echo $exam_year;?></td>
                                                    <td><?php echo $attendance;?></td>
                                                    <td>
                                                        <a href="javascript:void();" data-toggle="modal" data-target="#delete-attendance<?php echo $attendance_id; ?>">
                                                            <i class="fa fa-trash" data-toggle="tooltip" title="Delete attendance"></i>
                                                        </a>&nbsp;

                                                    </td>
                                                </tr>

                                            <?php endforeach; ?>
                                            <?php
                                        }else{
                                            ?> <tr>
                                                <td colspan="9" class="text-center">No Data in table</td>
                                            </tr><?php
                                        }

                                        ?>
                                        </tbody>
                                        <tfoot>
                                        <tr>
                                            <th>#</th>
                                            <th>Photo</th>
                                            <th>Name</th>
                                            <th>Class</th>
                                            <th>Section</th>
                                            <th>Exam</th>
                                            <th>Exam Year</th>
                                            <th>No of Attendance</th>
                                            <th>Action</th>
                                        </tr>
                                        </tfoot>
                                    </table>
                                    <?php

                                    foreach ($result_details as $student_details) {
                                        $name = $student_details->student_name;
                                        $attendance_id = $student_details->id;
                                        # run html delete modal
                                        ?>

                                        <!-- Delete member Modal start -->
                                        <div class="modal fade" id="delete-attendance<?php echo $attendance_id;?>" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
                                            <div class="modal-dialog modal-md" role="document">
                                                <div class="modal-content">
                                                    <div class="modal-header">
                                                        <h5 class="modal-title" id="exampleModalLabel">Delete attendance for <?php echo $name; ?></h5>
                                                        <button type="button" class="close" data-dismiss="modal" aria-label="Close"></button>
                                                    </div>
                                                    <div class="modal-body">
                                                        <h4>Are you sure you want to do this?
                                                            <br><small class="text-warning">This action cannot be undone.</small></h4>
                                                        <form action="" method="post">
                                                            <div class="form-group">
                                                                <input type="hidden" name="id" value="<?php echo $attendance_id; ?>">
                                                                <div class="form-group">
                                                                </div>
                                                            </div>

                                                            <div class="modal-footer" style="margin-bottom: -10px;">
                                                                <button class="btn" data-dismiss="modal"><i class="flaticon-cancel-12"></i> Cancel</button>
                                                                <input type="submit" class="btn btn-outline-danger" value="Delete Attendance" id="submit" name="delete_attendance">
                                                            </div>
                                                        </form>

                                                    </div>
                                                </div>
                                            </div>
                                        </div>
                                        <!-- Delete member Modal end -->

                                        <?php

                                    }
                                }



                                ?>

                            </div>
                            <!-- /.card-body -->
                        </div>


                    </section>
                </div>

                <div id="show-msg">

                </div>
                <!-- /.row (main row) -->
            </div><!-- /.container-fluid -->
        </section>
        <!-- /.content -->
    </div>
    <!-- /.content-wrapper -->
    <?php include "../admin/includes/footer.php";?>

    <?php
    if(isset($_POST['delete_attendance'])){

        $id = $_POST['id'];

        //delete teacher from database

        $sql = "DELETE  FROM attendance WHERE id =:id";
        $conn->query($sql);
        $conn->bind(":id", $id);
        try{
            $link = $teacher_url .'attendance';
            $conn->execute();
            echo "<script>
                         toastr['success']('Attendance deleted successfully.');
                         </script>  <meta http-equiv='refresh' content='3; $link'>";

        }catch(PDOException $err){

            echo $err->getMessage();

        }


    }

    ?>

    <script>
        $(document).ready(function(){
            $('[data-toggle="tooltip"]').tooltip();
        });
    </script>

    <script>
        $(function () {
            $("#teacher").DataTable({
                "responsive": true, "lengthChange": false, "autoWidth": false,
                "buttons": ["copy", "csv", "pdf", "print"]
            }).buttons().container().appendTo('#teacher_wrapper .col-md-6:eq(0)');
            $('#example2').DataTable({
                "paging": true,
                "lengthChange": false,
                "searching": true,
                "ordering": true,
                "info": true,
                "autoWidth": false,
                "responsive": true
            });
        });
    </script>

    <?php
    }else{
    ?>
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, shrink-to-fit=no">


        <?php include '../admin/includes/styles.php'; ?>
        <title>Login to continue |  <?php echo $school_name; ?> </title>

        <!-- END PAGE LEVEL PLUGINS/CUSTOM STYLES -->

    </head>
    <body>
    <div class="container" style="margin-top: 20%;">
        <div class="row">
            <div class="col-lg-12 col-md-12">
                <div class="section-title text-center">
                    <h6> You need to login to continue </h6>
                    <div class="spinner-border text-info" role="status">
                        <span class="sr-only">Loading...</span>
                        <meta http-equiv='refresh' content='3; <?php echo $teacher_login_link; ?>'>
                    </div>
                    <p>Redirecting to the login  page...</p>
                </div>
            </div>
        </div>
    </div>

    <?php
    }

    ?>
