@extends('layouts.app_view');

@section('content')
    <div class="main-panel">
        <div class="content-wrapper">
            <div class="row">
                <div class="col-md-10 grid-margin stretch-card">
                    <div class="card">
                        <div class="card-body">
                            <h4 class="card-title">{{isset($teacher)? 'Edit': 'Add New'}} Teacher {{isset($teacher)? 'with The Number: '.$teacher->teacher_num: ''}}</h4>
                            <p class="card-description">
                                Assign the teacher a classroom and subject.
                            </p>
                            <form class="forms-sample" action="{{ isset($teacher) ? '/teacher/update/'.$teacher->id : '/teacher/store' }}" method="post" enctype="multipart/form-data">
                                @csrf
                                <div class="row">
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="first_name" class="col-sm-3 col-form-label">First Name</label>
                                            <div class="col-sm-9">
                                                <input type="text" class="form-control" name="first_name" id="first_name" autofocus
                                                       placeholder="First Name" value="{{isset($teacher)? $teacher->first_name: old('first_name')}}">
                                                @if ($errors->has('first_name'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('first_name')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="surname" class="col-sm-3 col-form-label">Last Name</label>
                                            <div class="col-sm-9">
                                                <input type="text" class="form-control" name="surname" id="surname"
                                                       placeholder="Last Name" value="{{isset($teacher)? $teacher->surname: old('surname')}}">
                                                @if ($errors->has('surname'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('surname')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                </div>

                                <div class="row">
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="gender" class="col-sm-3 col-form-label">Gender</label>
                                            <div class="col-sm-9">
                                                <select id="gender" name="gender" class="form-control form-control-sm">
                                                    @if(isset($teacher->gender))
                                                        <option value="0" {{($teacher->gender == 0)? 'selected': ''}}>Male</option>
                                                        <option value="1" {{($teacher->gender == 1)? 'selected': ''}}>Female</option>
                                                    @else
                                                        <option value="0">Male</option>
                                                        <option value="1">Female</option>
                                                    @endif
                                                </select>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="birth_date" class="col-sm-3 col-form-label">Date of Birth</label>
                                            <div class="col-sm-9">
                                                <input type="date" class="form-control" name="birth_date" id="birth_date" min="01/01/1950"
                                                       placeholder="dd/mm/yyyy" value="{{isset($teacher)? $teacher->birth_date: old('birth_date')}}">
                                                @if ($errors->has('birth_date'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('birth_date')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                </div>
{{--                                Todo: I will add subject assigning page for the teacher.--}}
{{--                                <div class="row">
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="classroom" class="col-sm-3 col-form-label">Classroom</label>
                                            <div class="col-sm-9">
                                                <select id="classroom" name="classroom" class="form-control form-control-sm" data-dependent = 'subject'>
                                                    <option value="">Select a Classroom</option>
                                                    @if(isset($teacher))
                                                        @foreach($classrooms as $classroom)
                                                            <option value="{{$classroom->id}}" {{isset($teacher)?
                                                        'Editing the Teacher '.$teacher->teacher_num: ''}}>{{$classroom->name}}</option>
                                                        @endforeach
                                                    @else
                                                        @foreach($classrooms as $classroom)
                                                            <option value="{{$classroom->id}}">{{$classroom->name}}</option>
                                                        @endforeach
                                                    @endif
                                                </select>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="subject" class="col-sm-3 col-form-label">Subject</label>
                                            <div class="col-sm-9">
                                                <select id="subject" name="subject" class="form-control form-control-sm">
                                                    <option value="">Select a Subject</option>
                                                </select>
                                            </div>
                                        </div>
                                    </div>
                                    {{ csrf_field() }}
                                </div>--}}
                                <div class="row">
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="phone_number" class="col-sm-3 col-form-label">Phone Number</label>
                                            <div class="col-sm-9">
                                                <input type="text" class="form-control" name="phone_number" id="phone_number"
                                                       placeholder="Enter Phone Number Beginning with 0" value="{{isset($teacher)? $teacher->phone_number: old('phone_number')}}">
                                                @if ($errors->has('phone_number'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('phone_number')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>

                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="email" class="col-sm-3 col-form-label">Email</label>
                                            <div class="col-sm-9">
                                                <input type="email" class="form-control" name="email" id="email"
                                                       placeholder="Email Address" value="{{isset($teacher)? $teacher->email: old('email')}}">
                                                @if ($errors->has('email'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('email')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col-md-12">
                                        <div class="form-group row">
                                            <label for="address" class="col-sm-1 col-form-label">Address</label>
                                            <div class="col-sm-11">
                                                <textarea type="text" style="resize: vertical;" rows="3" class="form-control" name="address" id="address"
                                                          placeholder="Address">{{isset($teacher)? $teacher->address: old('address')}}</textarea>
                                                @if ($errors->has('address'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('address')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label for="photo" class="col-sm-3 col-form-label">Upload Photo</label>
                                            <div class="col-sm-9">
                                                <input type="file" class="form-control" name="photo" id="photo"
                                                       placeholder="">
                                                @if ($errors->has('photo'))
                                                    <div class="alert alert-danger">
                                                        {{$errors->first('photo')}}
                                                    </div>
                                                @endif
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group row">
                                            <label class="col-sm-3 col-form-label">Preview</label>
                                            <div class="col-sm-9">
                                                <div class="preview-image"></div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <button type="submit" class="btn btn-primary me-2">Save</button>
                                <a class="btn btn-light" href="/teacher">Cancel</a>
                            </form>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <script type="text/javascript">
        $(document).ready(function (){
            //A way to form dependence between two dropboxs using ajax jquery.
            // Todo: ask for the differences between these ways and which one has better performance.
            $('#classroom').change(function (){
                if($(this).val() !== '') {
                    var classroomId = $(this).val();
                    getClassSubjects(classroomId);
                } else {
                    $('#subject').html('<option value="">Select a Subject</option>');
                }
            });
            //Another way to form dependence between two dropboxs using ajax jquery.
            /*$('#classroom').change(function (){
                if($(this).val() !== '')
                {
                    var classroomId = document.getElementById('classroom').value;
                    var dependent = $(this).data('dependent');
                    var _token = $('input[name="_token"]').val();
                    $.ajax({
                        {{--url:"{{ route('ajax.fetchSubjects') }}",--}}
                        method:"POST",
                        data:{id:classroomId, _token:_token},
                        success:function(result)
                        {
                            $('#'+dependent).html(result);
                        }

                    });
                } else {
                    $('#subject').html('<option value="">Select a Subject</option>');
                }
            });*/
        });

        function getClassSubjects(classroomId) {
            const xhttp = new XMLHttpRequest();
            xhttp.onreadystatechange = function() {
                if (this.readyState === 4 && this.status === 200) {
                    document.getElementById("subject").innerHTML =
                        this.responseText;
                }
            };
            xhttp.open("get", "ajax/fetchSubjects/" + classroomId);
            xhttp.send();
        }
    </script>
@endsection