@extends('teacher.teacher_dashboard')

@section('admin')
<!--**********************************
    Content body start
***********************************-->
<div class="content-body default-height">
    <div class="container-fluid">

        {{-- Breadcrumb --}}
        <div class="row page-titles">
            <ol class="breadcrumb">
                <li class="breadcrumb-item"><a href="javascript:void(0)">CMS</a></li>
                <li class="breadcrumb-item"><a href="javascript:void(0)">Homework</a></li>
                <li class="breadcrumb-item active"><a href="javascript:void(0)">Edit</a></li>
            </ol>
        </div>

        {{-- Validation Errors --}}
        @if ($errors->any())
            <div class="alert alert-danger">
                <ul class="mb-0">
                    @foreach ($errors->all() as $error)
                        <li>{{ $error }}</li>
                    @endforeach
                </ul>
            </div>
        @endif

        <div class="row">
            <div class="col-xl-12">

                {{-- Header / Tools --}}
                <div class="mb-4 pb-2 d-flex align-items-center justify-content-between flex-wrap">
                    <h4 class="mb-2">Edit Homework</h4>
                    <div class="mb-2">
                        <a href="{{ route('homeworks.index') }}" class="btn btn-primary btn-sm">
                            <i class="fa-solid fa-list me-1"></i> Homework List
                        </a>
                    </div>
                </div>

                {{-- Form Box (CMS style) --}}
                <div class="filter cm-content-box box-primary">
                    <div class="content-title SlideToolHeader">
                        <div class="cpa">
                            <i class="fa-solid fa-file-pen me-2"></i>Edit Homework
                        </div>
                        <div class="tools">
                            <a href="javascript:void(0);" class="expand handle">
                                <i class="fal fa-angle-down"></i>
                            </a>
                        </div>
                    </div>

                    <div class="cm-content-body form excerpt">
                        <div class="card-body">

                            <form action="{{ route('homeworks.update', $homework->id) }}" method="POST" enctype="multipart/form-data">
                                @csrf
                                @method('PUT')

                                <div class="row">

                                    {{-- Session --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="session_id" class="form-label">Session</label>
                                        <select id="session_id" name="session_id" class="form-control default-select h-auto wide" required>
                                            <option value="">Select Session</option>
                                            @foreach($sessions as $session)
                                                <option value="{{ $session->id }}" {{ $currentSession && $currentSession->id == $session->id ? 'selected' : '' }}>{{ $session->name }}</option>
                                            @endforeach
                                        </select>
                                    </div>

                                    {{-- Class --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="class_id" class="form-label">Class</label>
                                        <select id="class_id" name="class_id" class="form-control default-select h-auto wide" required>
                                            <option value="">Select Class</option>
                                        </select>
                                    </div>

                                    {{-- Section --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="section_id" class="form-label">Section</label>
                                        <select id="section_id" name="section_id" class="form-control default-select h-auto wide" required>
                                            <option value="">Select Section</option>
                                        </select>
                                    </div>

                                    {{-- Subject --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="subject_id" class="form-label">Subject</label>
                                        <select id="subject_id" name="subject_id" class="form-control default-select h-auto wide" required>
                                            <option value="">Select Subject</option>
                                        </select>
                                    </div>

                                    {{-- Due Date --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="due_date" class="form-label">Due Date</label>
                                        <input type="date" id="due_date" name="due_date" class="form-control"
                                               value="{{ old('due_date', \Carbon\Carbon::parse($homework->due_date)->format('Y-m-d')) }}" required>
                                    </div>

                                    {{-- Title Template Selector --}}
                                    <div class="col-xl-4 col-sm-6 mb-3">
                                        <label for="title_template" class="form-label">
                                            <i class="fa-solid fa-file-lines me-1"></i>Title Template (Optional)
                                        </label>
                                        <select id="title_template" class="form-control default-select h-auto wide">
                                            <option value="">-- Select Title Template --</option>
                                        </select>
                                        <small class="text-muted">Select a template to auto-fill the title</small>
                                    </div>

                                    {{-- Title --}}
                                    <div class="col-xl-8 col-sm-6 mb-3">
                                        <label for="title" class="form-label">Title <span class="text-danger">*</span></label>
                                        <input type="text" id="title" name="title" class="form-control" placeholder="Homework title"
                                               value="{{ old('title', $homework->title) }}" required>
                                    </div>

                                    {{-- Description Template Selector --}}
                                    <div class="col-xl-12 mb-2">
                                        <label for="description_template" class="form-label">
                                            <i class="fa-solid fa-file-lines me-1"></i>Description Template (Optional)
                                        </label>
                                        <select id="description_template" class="form-control default-select h-auto wide">
                                            <option value="">-- Select Description Template --</option>
                                        </select>
                                        <small class="text-muted">Select a template to auto-fill the description</small>
                                    </div>

                                    {{-- Description --}}
                                    <div class="col-xl-12 mb-3">
                                        <label for="description" class="form-label">Description</label>
                                        <textarea id="description" name="description" class="form-control" rows="4" placeholder="Write homework details...">{{ old('description', $homework->description) }}</textarea>
                                    </div>

                                    {{-- Attachment --}}
                                    <div class="col-xl-6 col-sm-12 mb-3">
                                        <label for="attachment" class="form-label">Attachment (optional)</label>
                                        <input type="file" id="attachment" name="attachment" class="form-control">
                                        @if($homework->attachment_url)
                                            <small class="d-block mt-2">
                                                Current file:
                                                <a href="{{ $homework->attachment_url }}" target="_blank">View Attachment</a>
                                            </small>
                                        @endif
                                    </div>

                                    {{-- Actions --}}
                                    <div class="col-xl-6 col-sm-12 mb-3 d-flex align-items-end justify-content-end gap-2">
                                        <a href="{{ route('homeworks.index') }}" class="btn btn-danger light">
                                            Cancel
                                        </a>
                                        <button type="submit" class="btn btn-primary">
                                            <i class="fa-solid fa-floppy-disk me-1"></i> Update Homework
                                        </button>
                                    </div>

                                </div>
                            </form>

                        </div>
                    </div>
                </div>

            </div>
        </div>

    </div>
</div>
<!--**********************************
    Content body end
***********************************-->
@endsection


@section('customjs')
<script>
document.addEventListener('DOMContentLoaded', function(){
    const selectedClassId = "{{ old('class_id', $homework->class_id) }}";
    const selectedSectionId = "{{ old('section_id', $homework->section_id) }}";
    const selectedSubjectId = "{{ old('subject_id', $homework->subject_id) }}";

    // Function to load templates by type
    function loadTemplates(type, selectElement) {
        fetch("{{ route('templates.getByType') }}", {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "X-CSRF-TOKEN": document.querySelector('meta[name="csrf-token"]').content
            },
            body: JSON.stringify({ type: type })
        })
        .then(res => res.json())
        .then(data => {
            let options = `<option value="">-- Select ${type.charAt(0).toUpperCase() + type.slice(1)} Template --</option>`;
            data.forEach(template => {
                options += `<option value="${template.id}" data-content="${escapeHtml(template.content)}">${template.name}</option>`;
            });
            document.querySelector(selectElement).innerHTML = options;
        })
        .catch(err => console.error('Error loading templates:', err));
    }

    // Function to escape HTML
    function escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    function loadClasses(sessionId, classIdToSelect = null) {
        if (!sessionId) {
            document.getElementById('class_id').innerHTML = `<option value="">Select Class</option>`;
            document.getElementById('section_id').innerHTML = `<option value="">Select Section</option>`;
            document.getElementById('subject_id').innerHTML = `<option value="">Select Subject</option>`;
            return Promise.resolve();
        }

        return fetch("{{ route('teacher.getClasses') }}", {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "X-CSRF-TOKEN": document.querySelector('meta[name="csrf-token"]').content
            },
            body: JSON.stringify({ session_id: sessionId })
        })
        .then(res => res.json())
        .then(data => {
            let cls = `<option value="">Select Class</option>`;
            data.forEach(item => {
                const selected = classIdToSelect && String(item.id) === String(classIdToSelect) ? 'selected' : '';
                cls += `<option value="${item.id}" ${selected}>${item.name}</option>`;
            });
            document.getElementById('class_id').innerHTML = cls;
            document.getElementById('section_id').innerHTML = `<option value="">Select Section</option>`;
            document.getElementById('subject_id').innerHTML = `<option value="">Select Subject</option>`;
        });
    }

    function loadSections(sessionId, classId, sectionIdToSelect = null) {
        if (!sessionId || !classId) {
            document.getElementById('section_id').innerHTML = `<option value="">Select Section</option>`;
            document.getElementById('subject_id').innerHTML = `<option value="">Select Subject</option>`;
            return Promise.resolve();
        }

        return fetch("{{ route('teacher.getSections') }}", {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "X-CSRF-TOKEN": document.querySelector('meta[name="csrf-token"]').content
            },
            body: JSON.stringify({
                session_id: sessionId,
                class_id: classId
            })
        })
        .then(res => res.json())
        .then(data => {
            let sec = `<option value="">Select Section</option>`;
            Object.values(data).forEach(s => {
                const selected = sectionIdToSelect && String(s.id) === String(sectionIdToSelect) ? 'selected' : '';
                sec += `<option value="${s.id}" ${selected}>${s.name}</option>`;
            });
            document.getElementById('section_id').innerHTML = sec;
            document.getElementById('subject_id').innerHTML = `<option value="">Select Subject</option>`;
        });
    }

    function loadSubjects(sessionId, classId, sectionId, subjectIdToSelect = null) {
        if (!sessionId || !classId || !sectionId) {
            document.getElementById('subject_id').innerHTML = `<option value="">Select Subject</option>`;
            return Promise.resolve();
        }

        return $.get("/teacher/get-subjects/" + sessionId + "/" + classId + "/" + sectionId, function(data) {
            $("#subject_id").empty().append('<option value="">Select Subject</option>');
            $.each(data, function(key, val) {
                const selected = subjectIdToSelect && String(val.subject_id) === String(subjectIdToSelect) ? 'selected' : '';
                $("#subject_id").append('<option value="' + val.subject_id + '" ' + selected + '>' + val.subject.name + '</option>');
            });
        });
    }

    // Handle title template selection
    document.getElementById('title_template').addEventListener('change', function() {
        const selectedOption = this.options[this.selectedIndex];
        const content = selectedOption.getAttribute('data-content');
        if (content) {
            document.getElementById('title').value = content;
        }
    });

    // Handle description template selection
    document.getElementById('description_template').addEventListener('change', function() {
        const selectedOption = this.options[this.selectedIndex];
        const content = selectedOption.getAttribute('data-content');
        if (content) {
            document.getElementById('description').value = content;
        }
    });

    // Session/class/section change handlers
    document.getElementById('session_id').addEventListener('change', function() {
        loadClasses(this.value);
    });

    document.getElementById('class_id').addEventListener('change', function() {
        loadSections(document.getElementById('session_id').value, this.value);
    });

    document.getElementById('section_id').addEventListener('change', function() {
        loadSubjects(
            document.getElementById('session_id').value,
            document.getElementById('class_id').value,
            this.value
        );
    });

    // Load templates on page load
    loadTemplates('title', '#title_template');
    loadTemplates('description', '#description_template');

    // Preload cascading dropdown data for existing homework
    const sessionId = document.getElementById('session_id').value;
    loadClasses(sessionId, selectedClassId)
        .then(() => loadSections(sessionId, selectedClassId, selectedSectionId))
        .then(() => loadSubjects(sessionId, selectedClassId, selectedSectionId, selectedSubjectId))
        .catch(err => console.error('Error preloading dropdowns:', err));
});
</script>
@endsection