@extends('backend.admin_backend.admin_dashboard')

@section('admin')

<div class="container-fluid">

    {{-- ================= PAGE TITLE ================= --}}
    <div class="row mb-3">
        <div class="col-md-12">

            <div class="card shadow-sm">

                <div class="card-body">

                    <h4 class="fw-bold mb-0">
                        📊 Result Upload Module
                    </h4>

                    <small class="text-muted">
                        Select Class, Subject, Term and Session to load students.
                    </small>

                </div>

            </div>

        </div>
    </div>


    {{-- ================= FILTER CARD ================= --}}
    <div class="card shadow">

        <div class="card-header bg-primary text-white">

            <strong>
                Result Loader
            </strong>

        </div>

        <div class="card-body">

            <form id="resultFilterForm">

                @csrf

                <div class="row">

                    {{-- CLASS --}}
                    <div class="col-md-3 mb-3">

                        <label class="form-label">

                            Class

                        </label>

                        <select
                            name="class_id"
                            id="class_id"
                            class="form-select"
                            required>

                            <option value="">

                                -- Select Class --

                            </option>

                            @foreach($classes as $class)

                                <option value="{{ $class->id }}">

                                    {{ $class->class_name }}

                                </option>

                            @endforeach

                        </select>

                    </div>


                    {{-- SUBJECT --}}
                    <div class="col-md-3 mb-3">

                        <label class="form-label">

                            Subject

                        </label>

                        <select
                            name="subject_id"
                            id="subject_id"
                            class="form-select"
                            required>

                            <option value="">

                                Select Class First

                            </option>

                        </select>

                    </div>


                    {{-- TERM --}}
                    <div class="col-md-3 mb-3">

                        <label class="form-label">

                            Term

                        </label>

                        <input
                            type="text"
                            readonly
                            name="term"
                            value="{{ $currentTerm->name }}"
                            class="form-control">

                    </div>


                    {{-- SESSION --}}
                    <div class="col-md-3 mb-3">

                        <label class="form-label">

                            Academic Session

                        </label>

                        <input
                            type="text"
                            readonly
                            name="session"
                            value="{{ $currentSession->name }}"
                            class="form-control">

                    </div>

                </div>


                <button
                    type="submit"
                    class="btn btn-primary">

                    Load Results

                </button>

            </form>

        </div>

    </div>



    {{-- AJAX TABLE LOADS HERE --}}
    <div
        id="resultTableContainer"
        class="mt-4">

    </div>

</div>





<script>





//==========================================
// LOAD SUBJECTS
//==========================================

$('#class_id').change(function(){

    let classId=$(this).val();

    $('#subject_id').html(

        '<option>Loading...</option>'

    );



    $.ajax({

        url: "{{ route('admin.result.subjects', ':id') }}"
        .replace(':id', classId),

        type:"GET",

        success:function(data){

            let html='';

            html+='<option value="">Select Subject</option>';

            $.each(data,function(index,item){

                html+=`
                <option value="${item.id}">
                    ${item.subject_name}
                </option>
                `;

            });

            $('#subject_id').html(html);

        }

    });

});





//==========================================
// LOAD RESULT TABLE
//==========================================

$('#resultFilterForm').submit(function(e){

    e.preventDefault();


    $.ajax({

        url: "{{ route('admin.result.load') }}",

        type: "POST",

        data: $(this).serialize(),


        /*
        |--------------------------------------------------------------------------
        | BEFORE REQUEST
        |--------------------------------------------------------------------------
        */

        beforeSend: function(){

            $('#resultTableContainer').html(`

                <div class="text-center p-5">

                    <div class="spinner-border text-primary"></div>

                    <br>

                    <span class="mt-2 d-block">

                        Loading Students...

                    </span>

                </div>

            `);

        },


        /*
        |--------------------------------------------------------------------------
        | SUCCESS
        |--------------------------------------------------------------------------
        */

        success: function(response){

            console.log(response);


            /*
            |--------------------------------------------------------------------------
            | NO STUDENTS ASSIGNED
            |--------------------------------------------------------------------------
            */

            if (

                typeof response === 'object' &&

                response.status === false

            ) {


                $('#resultTableContainer').html(`

                    <div class="alert alert-warning shadow-sm">

                        <div class="d-flex align-items-center">

                            <i
                                class="fas fa-exclamation-triangle fa-2x me-3">
                            </i>


                            <div>

                                <h6 class="fw-bold mb-1">

                                    No Students Assigned

                                </h6>


                                <div>

                                    ${response.message}

                                </div>

                            </div>

                        </div>

                    </div>

                `);


                return;

            }


            /*
            |--------------------------------------------------------------------------
            | STUDENTS EXIST
            |--------------------------------------------------------------------------
            |
            | Laravel returned the normal Blade table.
            |
            */

            $('#resultTableContainer').html(response);

        },

/*
|--------------------------------------------------------------------------
| ERROR
|--------------------------------------------------------------------------
|
| IMPORTANT:
| Never expose Laravel, PHP, SQL, or server error details
| to the user.
|
| Detailed errors should only be checked from the browser
| console during development.
|
*/

error: function(xhr){

    /*
    |--------------------------------------------------------------------------
    | Developer Console
    |--------------------------------------------------------------------------
    |
    | Keep the technical error available for the developer
    | while hiding it from the actual user.
    |
    */

    console.error('Request failed:', xhr);


    /*
    |--------------------------------------------------------------------------
    | USER-FRIENDLY ERROR MESSAGE
    |--------------------------------------------------------------------------
    */

    Swal.fire({

        icon: 'error',

        title: 'Something went wrong',

        text: 'Something went wrong. Please try again.',

        confirmButtonText: 'OK'

    });

}

    });

});





</script>

@endsection