<?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;
        }
        .btn-app:hover {
            background-color: #17a2b8 !important;
            border-color: #17a2b8 !important;
            color: #ffffff !important;
        }

        .btn-app:active{
            background: #c3570f !important;
            color: white !important;
        }
    </style>


    <?php
    include '../admin/includes/styles.php';
    ?>
    <title> Teacher | Students | <?php  echo $school_name; ?></title>
    <?php
    $sql = "SELECT * FROM teachers WHERE username =:username";
    $conn->query($sql);
    $conn->bind(":username", $username);

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

</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";?>

    <!-- 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">Students</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">Students</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 Students </h3>
                            </div>
                            <div class="card-header">
                                <h3 class="card-title"><a href="<?php echo $conn->teacher_url().'add-student'; ?>"> <i class="fa fa-plus"></i> Add a student </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 <i class="fa fa-info-circle" data-toggle="tooltip" title="N.B: Only classes with students added are clickable." style="cursor:pointer;"></i></h3>
                                <br><br>
                                <div>
                                    <?php

                                    //first fetch teacher's section
                                    $sql = "SELECT * FROM sections WHERE teacher_name =:teacher_name";
                                    $conn->query($sql);
                                    $conn->bind(":teacher_name", $teacher_name);
                                    $rowCount = $conn->rowCount();

                                    if($rowCount > 0){
                                        $result = $conn->fetchSingle();
                                        //teacher is a section teacher
                                        $sectionName = $result->name;
                                        //go ahead and fetch teachers class ID
                                        $classID = $result->class;


                                        // fetch class name
                                        $sql = "SELECT name FROM classes WHERE id =:classID";
                                        $conn->query($sql);
                                        $conn->bind(":classID", $classID);
                                        $className  = strtolower($conn->slugify($conn->fetchColumn()));

                                        //fetch section ID
                                        $sql = "SELECT id FROM sections WHERE name =:section_name AND class =:class_id";
                                        $conn->query($sql);
                                        $conn->bind(":section_name", $sectionName);
                                        $conn->bind(":class_id", $classID);
                                        $sectionId = $conn->fetchColumn();


                                        //fetch available students in the selected class and section
                                        $sql = "SELECT COUNT(studentID) FROM student WHERE classesID =:class_id AND sectionid =:section_id";
                                        $conn->query($sql);
                                        $conn->bind(":class_id", $classID);
                                        $conn->bind(":section_id", $sectionId);
                                        $students_available = $conn->fetchColumn();
                                        //enable or disable link on number of available sections  href="section/<?php echo $class_id;
                                        $url = $conn->teacher_url()."student/$classID/$sectionId";


                                        ?>
                                        <a class="btn btn-app" style="min-width: 120px; height: 90px;" <?php if($students_available != 0){echo "href='$url'";}?>>
                                            <span class="badge bg-success" data-toggle="tooltip" title="<?php echo $students_available ?> student(s) available in class <?php echo $className . ' '. $sectionName; ?>"><?php echo $students_available ?></span>
                                            <i class="fas fa-users" style="font-size: 50px;"></i> <?php echo ucwords(str_replace('-', ' ', $className) . ' ' . $sectionName); ?>
                                        </a>
                                        <?php



                                    }else{
                                        //teacher is a subject teacher
                                        ?> <p class="text-center text-info">You are not section teacher. Only section teachers can view sections.</p> <?php
                                    }


                                    ?>

                                </div>
                                <?php
                                //display selected section below
                                if(isset($_GET['class']) AND isset($_GET['section'])){
                                    $classid = $_GET['class'];
                                    $sectionid = $_GET['section'];
                                    $sql = "SELECT *  FROM student WHERE classesid =:class_id AND sectionid =:section_id";
                                    $conn->query($sql);
                                    $conn->bind(":class_id", $classid);
                                    $conn->bind(":section_id", $sectionid);
                                    $result = $conn->fetchMultiple();

                                    //fetch class name

                                    $sql = "SELECT name FROM classes WHERE id =:id";
                                    $conn->query($sql);
                                    $conn->bind(":id", $classid);
                                    $className = $conn->fetchColumn();

                                    //fetch section name

                                    $sql = "SELECT name FROM sections WHERE id =:id";
                                    $conn->query($sql);
                                    $conn->bind(":id", $sectionid);
                                    $sectionName = $conn->fetchColumn();



                                    ?>
                                    <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 details for class <?php echo $className . ' '. $sectionName; ?> </h3>
                                    </div>
                                    <table id="teacher" class="table table-bordered table-striped">
                                        <thead>
                                        <tr>
                                            <th>#</th>
                                            <th>Photo</th>
                                            <th>Name</th>
                                            <th>Username</th>
                                            <th>Exam no</th>
                                            <th>Section</th>
                                            <th>Status</th>
                                            <th>Action</th>
                                        </tr>
                                        </thead>
                                        <tbody>
                                        <?php
                                        $i = 1;
                                        if($conn->rowCount()){
                                            foreach ($result as $student_details):
                                                $name = $student_details->name;
                                                $username= $student_details->username;
                                                $photo = $student_details->photo;
                                                $student_id = $student_details->studentID;
                                                $sex= $student_details->sex;
                                                $reg_no = $student_details->registerNO;
                                                $status = $student_details->status;
                                                $sectionid = $student_details->sectionid;

                                                ?>
                                                <tr>
                                                    <td><?php echo $i++; ?></td>
                                                    <td>
                                                        <?php
                                                        if(empty($photo)){
                                                            ?> <img src="<?php echo $conn->base_url(); ?>images/default.png" alt="default" width="48" height="48"><?php
                                                        }else{
                                                            ?> <img src="<?php echo $conn->base_url(); ?>upload/<?php echo $photo;?>" alt="photo" width="48" height="48"><?php
                                                        }
                                                        ?>
                                                    </td>
                                                    <td><?php echo $name;?></td>
                                                    <td><?php echo $username;?></td>
                                                    <td><?php echo $reg_no;?></td>
                                                    <td><?php echo $sectionName;?></td>
                                                    <td>
                                                        <?php
                                                        if($status == 'on'){
                                                            ?> <i class="fa fa-check-circle" style="font-size: 20px; color: #085d3d; cursor:pointer;" data-toggle="tooltip" title="Active"></i> <?php
                                                        }else{
                                                            ?> <i class="fa fa-check-circle" style="font-size: 20px; color: #6c757d; cursor:pointer;" data-toggle="tooltip" title="Inactive"></i> <?php
                                                        }
                                                        ?>
                                                    </td>
                                                    <td>
                                                        <a href="<?php echo $conn->teacher_url(); ?>view-student/<?php echo $student_id;?>" data-toggle="tooltip" title="View">
                                                            <i class="fa fa-check-square"></i>
                                                        </a>&nbsp;
                                                    </td>
                                                </tr>

                                            <?php endforeach; ?>
                                            <?php
                                        }else{
                                            ?> <tr>
                                                <td colspan="7" class="text-center">No Data in table</td>
                                            </tr><?php
                                        }

                                        ?>
                                        </tbody>
                                        <tfoot>
                                        <tr>
                                            <th>#</th>
                                            <th>Photo</th>
                                            <th>Name</th>
                                            <th>Username</th>
                                            <th>Exam no</th>
                                            <th>Section</th>
                                            <th>Status</th>
                                            <th>Action</th>
                                        </tr>
                                        </tfoot>
                                    </table>
                                    <?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";?>

    <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
    }

    ?>
