@extends('layouts.main_dashboard.app')

@section('title', __('dashboard.All Subjects'))
@section('page_heading', __('dashboard.All Subjects'))
@section('page_subtitle', app()->getLocale() === 'ar' ? 'إدارة المواد الدراسية وربطها بالمراحل والأقسام من واجهة أوضح وأهدأ.' : 'Manage academic subjects and their stage and department links from a clearer interface.')
@section('skip_page_hero', true)

@php
    $isArabic = app()->getLocale() === 'ar';
    $filtersOpenByDefault = request()->hasAny(['year', 'term', 'stage', 'grade', 'department']);
    $subjectsCollection = $subjects->getCollection();
    $withDepartments = $subjectsCollection->filter(fn ($subject) => filled(optional($subject->department)->name))->count();
    $withoutDepartments = $subjectsCollection->count() - $withDepartments;
    $totalUnits = $subjectsCollection->sum('subject_units_count');
    $totalLessons = $subjectsCollection->sum('lessons_count');
@endphp

@section('content')
<div class="space-y-6" x-data="{ filtersOpen: {{ $filtersOpenByDefault ? 'true' : 'false' }} }">
    <section class="rounded-xl border border-surface-200 bg-white p-6 shadow-sm dark:border-surface-800 dark:bg-surface-900">
        <div class="flex flex-col gap-5 lg:flex-row lg:items-center lg:justify-between">
            <div class="space-y-2">
                <h2 class="text-2xl font-black tracking-tight text-surface-900 dark:text-white">{{ __('dashboard.All Subjects') }}</h2>
                <p class="max-w-2xl text-sm leading-7 text-surface-500 dark:text-surface-400">
                    {{ $isArabic ? 'اعرض المواد الدراسية مع المرحلة والصف والقسم وعدد الوحدات والدروس من شاشة إدارية موحّدة.' : 'Review subjects with stage, grade, department, unit count, and lesson count from one unified admin screen.' }}
                </p>
            </div>

            <div class="flex flex-wrap items-center gap-3">
                <div class="inline-flex items-center gap-3 rounded-xl border border-surface-200 bg-surface-50 px-4 py-3 dark:border-surface-700 dark:bg-surface-950">
                    <p class="text-sm font-bold text-surface-500 dark:text-surface-400">{{ $isArabic ? 'إجمالي المواد' : 'Total subjects' }}</p>
                    <p class="text-2xl font-black leading-none text-surface-900 dark:text-white">{{ $subjects->total() }}</p>
                </div>
                <a href="{{ route('admin.subjects.create') }}" class="inline-flex items-center gap-2 rounded-xl bg-brand-600 px-4 py-2 text-sm font-bold text-white transition hover:bg-brand-700">
                    <i class="fa-solid fa-plus text-xs"></i>
                    <span>{{ __('dashboard.Add New Subject') }}</span>
                </a>
            </div>
        </div>
    </section>

    <section class="overflow-hidden rounded-xl border border-surface-200 bg-white shadow-sm dark:border-surface-800 dark:bg-surface-900">
        <div class="border-b border-surface-200 bg-surface-50/80 px-6 py-5 dark:border-surface-800 dark:bg-surface-800/30">
            <div class="flex flex-col gap-4 lg:flex-row lg:items-end lg:justify-between">
                <div class="space-y-1">
                    <p class="text-[11px] font-black uppercase tracking-[0.24em] text-surface-400">{{ $isArabic ? 'فهرس أكاديمي' : 'Academic catalog' }}</p>
                    <h2 class="text-xl font-black text-surface-900 dark:text-white">{{ __('dashboard.Subjects') }}</h2>
                    <p class="text-sm text-surface-500 dark:text-surface-400">
                        {{ $isArabic ? 'قائمة منظمة تساعدك على مراجعة الربط الأكاديمي لكل مادة بسرعة.' : 'A structured list that helps you review each subject academic link quickly.' }}
                    </p>
                </div>

                <div class="grid grid-cols-2 gap-3 sm:grid-cols-4">
                    <div class="rounded-2xl border border-surface-200 bg-white px-4 py-3 dark:border-surface-700 dark:bg-surface-900">
                        <p class="text-[11px] font-bold text-surface-500 dark:text-surface-400">{{ $isArabic ? 'داخل الصفحة' : 'Visible now' }}</p>
                        <p class="mt-1 text-xl font-black leading-none text-surface-900 dark:text-white">{{ $subjectsCollection->count() }}</p>
                    </div>
                    <div class="rounded-2xl border border-surface-200 bg-white px-4 py-3 dark:border-surface-700 dark:bg-surface-900">
                        <p class="text-[11px] font-bold text-surface-500 dark:text-surface-400">{{ $isArabic ? 'مرتبطة بقسم' : 'With department' }}</p>
                        <p class="mt-1 text-xl font-black leading-none text-surface-900 dark:text-white">{{ $withDepartments }}</p>
                    </div>
                    <div class="rounded-2xl border border-surface-200 bg-white px-4 py-3 dark:border-surface-700 dark:bg-surface-900">
                        <p class="text-[11px] font-bold text-surface-500 dark:text-surface-400">{{ $isArabic ? 'إجمالي الوحدات' : 'Total units' }}</p>
                        <p class="mt-1 text-xl font-black leading-none text-surface-900 dark:text-white">{{ $totalUnits }}</p>
                    </div>
                    <div class="rounded-2xl border border-surface-200 bg-white px-4 py-3 dark:border-surface-700 dark:bg-surface-900">
                        <p class="text-[11px] font-bold text-surface-500 dark:text-surface-400">{{ $isArabic ? 'إجمالي الدروس' : 'Total lessons' }}</p>
                        <p class="mt-1 text-xl font-black leading-none text-surface-900 dark:text-white">{{ $totalLessons }}</p>
                    </div>
                </div>
            </div>
        </div>

        <div class="border-b border-surface-200 px-6 py-5 dark:border-surface-800">
            <div class="flex flex-col gap-4 lg:flex-row lg:items-center lg:justify-between">
                <div class="space-y-1">
                    <p class="text-sm font-black text-surface-900 dark:text-white">{{ $isArabic ? 'تصفية المواد' : 'Filter subjects' }}</p>
                    <p class="text-sm text-surface-500 dark:text-surface-400">{{ $isArabic ? 'حدّد السنة والفصل والمرحلة والصف والقسم لعرض نطاق أدق.' : 'Narrow the list by year, term, stage, grade, and department.' }}</p>
                </div>

                <div class="flex flex-wrap items-center gap-3">
                    <div class="inline-flex items-center gap-2 rounded-full bg-surface-100 px-3 py-1.5 text-xs font-bold text-surface-600 dark:bg-surface-800 dark:text-surface-300">
                        <span>{{ $isArabic ? 'بدون قسم' : 'Without department' }}</span>
                        <span>{{ $withoutDepartments }}</span>
                    </div>
                    <button type="button" @click="filtersOpen = !filtersOpen" class="inline-flex h-11 items-center gap-2 rounded-xl border border-surface-200 bg-white px-4 text-sm font-bold text-surface-700 transition hover:bg-surface-50 dark:border-surface-700 dark:bg-surface-900 dark:text-surface-200 dark:hover:bg-surface-800">
                        <i class="fa-solid" :class="filtersOpen ? 'fa-sliders' : 'fa-filter'"></i>
                        <span>{{ __('dashboard.Filter') }}</span>
                    </button>
                </div>
            </div>
        </div>

        <div x-show="filtersOpen" x-collapse class="border-b border-surface-200 px-6 py-6 dark:border-surface-800">
            <form action="{{ route('admin.subjects.index') }}" method="GET" class="grid gap-4 md:grid-cols-2 xl:grid-cols-6">
                <select name="year" id="year-select" class="rounded-xl border border-surface-200 bg-white px-4 py-3 text-sm text-surface-700 outline-none transition focus:border-brand-400 dark:border-surface-700 dark:bg-surface-950 dark:text-surface-100">
                    <option value="">{{ __('dashboard.Select Year') }}</option>
                    @foreach($years as $year)
                        <option value="{{ $year->id }}" @selected(request('year', $currentYear->id ?? null) == $year->id)>{{ $year->name }}</option>
                    @endforeach
                </select>
                <select name="term" id="term-select" class="rounded-xl border border-surface-200 bg-white px-4 py-3 text-sm text-surface-700 outline-none transition focus:border-brand-400 dark:border-surface-700 dark:bg-surface-950 dark:text-surface-100" data-old-value="{{ request('term', $currentTerm->id ?? '') }}">
                    <option value="">{{ __('dashboard.Select Term') }}</option>
                    @foreach($terms as $term)
                        <option value="{{ $term->id }}" @selected(request('term', $currentTerm->id ?? null) == $term->id)>{{ $term->name }}</option>
                    @endforeach
                </select>
                <select name="stage" id="stage-select" class="rounded-xl border border-surface-200 bg-white px-4 py-3 text-sm text-surface-700 outline-none transition focus:border-brand-400 dark:border-surface-700 dark:bg-surface-950 dark:text-surface-100" data-old-value="{{ request('stage') }}">
                    <option value="">{{ __('dashboard.Select Stage') }}</option>
                    @foreach($stages as $stage)
                        <option value="{{ $stage->id }}" @selected(request('stage') == $stage->id)>{{ $stage->name }}</option>
                    @endforeach
                </select>
                <select name="grade" id="grade-select" class="rounded-xl border border-surface-200 bg-white px-4 py-3 text-sm text-surface-700 outline-none transition focus:border-brand-400 dark:border-surface-700 dark:bg-surface-950 dark:text-surface-100" data-old-value="{{ request('grade') }}">
                    <option value="">{{ __('dashboard.Select Grade') }}</option>
                    @foreach($grades as $grade)
                        <option value="{{ $grade->id }}" @selected(request('grade') == $grade->id)>{{ $grade->name }}</option>
                    @endforeach
                </select>
                <select name="department" class="rounded-xl border border-surface-200 bg-white px-4 py-3 text-sm text-surface-700 outline-none transition focus:border-brand-400 dark:border-surface-700 dark:bg-surface-950 dark:text-surface-100">
                    <option value="">{{ __('dashboard.Select Department') }}</option>
                    @foreach($departments as $department)
                        <option value="{{ $department->id }}" @selected(request('department') == $department->id)>{{ $department->name }}</option>
                    @endforeach
                </select>
                <div class="flex gap-3">
                    <button type="submit" class="inline-flex w-full items-center justify-center gap-2 rounded-xl bg-brand-600 px-4 py-3 text-sm font-bold text-white transition hover:bg-brand-700">
                        <i class="fa-solid fa-magnifying-glass text-xs"></i>
                        <span>{{ __('dashboard.Filter') }}</span>
                    </button>
                    <a href="{{ route('admin.subjects.index') }}" class="inline-flex items-center justify-center rounded-xl border border-surface-200 px-4 py-3 text-sm font-bold text-surface-600 transition hover:bg-surface-50 dark:border-surface-700 dark:text-surface-300 dark:hover:bg-surface-800">{{ __('dashboard.Reset') }}</a>
                </div>
            </form>
        </div>

        @if($subjects->isEmpty())
            <div class="px-6 py-16 text-center">
                <div class="mx-auto flex h-20 w-20 items-center justify-center rounded-full bg-brand-50 text-brand-600 dark:bg-brand-500/10 dark:text-brand-300">
                    <i class="fa-solid fa-book text-3xl"></i>
                </div>
                <h3 class="mt-6 text-xl font-black text-surface-900 dark:text-white">{{ __('dashboard.No data found') }}</h3>
                <p class="mt-3 text-sm text-surface-500 dark:text-surface-400">{{ $isArabic ? 'لا توجد مواد مطابقة للفلاتر الحالية.' : 'No subjects match the current filters.' }}</p>
            </div>
        @else
            <div class="overflow-x-auto">
                <table class="min-w-full divide-y divide-surface-200 dark:divide-surface-800">
                    <thead class="bg-surface-50/80 dark:bg-surface-800/40">
                        <tr class="text-right text-xs font-black uppercase tracking-[0.2em] text-surface-500 dark:text-surface-400">
                            <th class="px-6 py-4">{{ $isArabic ? 'المادة' : 'Subject' }}</th>
                            <th class="px-6 py-4">{{ $isArabic ? 'المسار الأكاديمي' : 'Academic path' }}</th>
                            <th class="px-6 py-4">{{ $isArabic ? 'القسم' : 'Department' }}</th>
                            <th class="px-6 py-4">{{ $isArabic ? 'الوحدات والدروس' : 'Units & lessons' }}</th>
                            <th class="px-6 py-4">{{ $isArabic ? 'الدرجة' : 'Total marks' }}</th>
                            <th class="px-6 py-4 text-left">{{ __('dashboard.Actions') }}</th>
                        </tr>
                    </thead>
                    <tbody class="divide-y divide-surface-200 dark:divide-surface-800">
                        @foreach($subjects as $subject)
                            <tr class="transition hover:bg-surface-50/80 dark:hover:bg-surface-800/20">
                                <td class="px-6 py-5">
                                    <div class="flex items-center gap-4">
                                        <div class="flex h-12 w-12 items-center justify-center overflow-hidden rounded-xl bg-brand-50 text-brand-700 dark:bg-brand-500/10 dark:text-brand-300">
                                            @if($subject->image)
                                                <img src="{{ \Illuminate\Support\Facades\Storage::url($subject->image) }}" alt="{{ $subject->name }}" class="h-full w-full object-cover">
                                            @else
                                                <i class="fa-solid fa-book"></i>
                                            @endif
                                        </div>
                                        <div class="min-w-0">
                                            <p class="text-sm font-black text-surface-900 dark:text-white">{{ $subject->name }}</p>
                                            <p class="mt-1 text-xs text-surface-500 dark:text-surface-400">#{{ $subject->id }}</p>
                                        </div>
                                    </div>
                                </td>
                                <td class="px-6 py-5 text-sm text-surface-600 dark:text-surface-300">
                                    {{ collect([
                                        optional($subject->grade->stage->term->year)->name,
                                        optional($subject->grade->stage->term)->name,
                                        optional($subject->grade->stage)->name,
                                        optional($subject->grade)->name,
                                    ])->filter()->implode(' / ') ?: '-' }}
                                </td>
                                <td class="px-6 py-5">
                                    @if(optional($subject->department)->name)
                                        <span class="inline-flex rounded-full bg-brand-50 px-3 py-1 text-xs font-bold text-brand-700 dark:bg-brand-500/10 dark:text-brand-300">{{ $subject->department->name }}</span>
                                    @else
                                        <span class="inline-flex rounded-full bg-surface-100 px-3 py-1 text-xs font-bold text-surface-600 dark:bg-surface-800 dark:text-surface-300">{{ __('dashboard.Not Assigned') }}</span>
                                    @endif
                                </td>
                                <td class="px-6 py-5 text-sm text-surface-600 dark:text-surface-300">
                                    <div class="flex flex-wrap gap-2">
                                        <span class="rounded-full border border-surface-200 px-3 py-1 text-xs font-bold dark:border-surface-700">{{ $subject->subject_units_count }} {{ __('dashboard.Units Count') }}</span>
                                        <span class="rounded-full border border-surface-200 px-3 py-1 text-xs font-bold dark:border-surface-700">{{ $subject->lessons_count }} {{ __('dashboard.Lessons Count') }}</span>
                                    </div>
                                </td>
                                <td class="px-6 py-5 text-sm font-black text-surface-900 dark:text-white">{{ $subject->total_marks }}</td>
                                <td class="px-6 py-5">
                                    <div class="flex justify-end">
                                        <div class="relative" x-data="{ open: false }">
                                            <button @click="open = !open" @click.outside="open = false" type="button"
                                                    class="w-8 h-8 flex items-center justify-center rounded-lg bg-surface-100 dark:bg-surface-800 text-surface-500 hover:bg-surface-200 dark:hover:bg-surface-700 transition-colors">
                                                <i class="fa-solid fa-ellipsis-vertical text-xs"></i>
                                            </button>
                                            <div x-show="open" x-cloak x-transition
                                                 class="absolute end-0 z-50 mt-1 w-48 rounded-xl border border-surface-200 dark:border-surface-700 bg-white dark:bg-surface-900 shadow-lg overflow-hidden">
                                                <a href="{{ route('admin.subject-units.index', $subject->id) }}" class="flex items-center gap-3 px-4 py-2.5 text-sm text-surface-700 dark:text-surface-300 hover:bg-surface-50 dark:hover:bg-surface-800 transition-colors">
                                                    <i class="fa-solid fa-layer-group w-4 text-center text-surface-400 text-xs"></i>{{ __('dashboard.View Units') }}
                                                </a>
                                                <a href="{{ route('admin.lessons.index', $subject->id) }}" class="flex items-center gap-3 px-4 py-2.5 text-sm text-surface-700 dark:text-surface-300 hover:bg-surface-50 dark:hover:bg-surface-800 transition-colors">
                                                    <i class="fa-solid fa-book-open w-4 text-center text-surface-400 text-xs"></i>{{ __('dashboard.View Lessons') }}
                                                </a>
                                                <a href="{{ route('admin.subjects.edit', $subject->id) }}" class="flex items-center gap-3 px-4 py-2.5 text-sm text-surface-700 dark:text-surface-300 hover:bg-surface-50 dark:hover:bg-surface-800 transition-colors">
                                                    <i class="fa-solid fa-pen-to-square w-4 text-center text-surface-400 text-xs"></i>{{ __('dashboard.Edit') }}
                                                </a>
                                                <div class="border-t border-surface-100 dark:border-surface-800"></div>
                                                <form method="POST" action="{{ route('admin.subjects.destroy', $subject->id) }}" onsubmit="return confirm('{{ __('dashboard.Are you sure you want to delete this item?') }}')">
                                                    @csrf @method('DELETE')
                                                    <button type="submit" class="w-full flex items-center gap-3 px-4 py-2.5 text-sm text-red-600 dark:text-red-400 hover:bg-red-50 dark:hover:bg-red-950/30 transition-colors">
                                                        <i class="fa-solid fa-trash w-4 text-center text-xs"></i>{{ __('dashboard.Delete') }}
                                                    </button>
                                                </form>
                                            </div>
                                        </div>
                                    </div>
                                </td>
                            </tr>
                        @endforeach
                    </tbody>
                </table>
            </div>

            @if ($subjects->hasPages())
                <div class="border-t border-surface-200 px-6 py-5 dark:border-surface-800">
                    {{ $subjects->appends(request()->query())->links('pagination::simple-tailwind') }}
                </div>
            @endif
        @endif
    </section>
</div>
@endsection

@section('scripts')
<script>
    $(function () {
        function fillOptions(selector, items, placeholder, selectedValue) {
            const select = $(selector);
            select.empty().append(`<option value="">${placeholder}</option>`);
            $.each(items, function (_, item) {
                const selected = String(item.id) === String(selectedValue);
                select.append(new Option(item.name, item.id, false, selected));
            });
        }

        $('#year-select').on('change', function () {
            const yearId = $(this).val();
            const termSelect = $('#term-select');
            const oldValue = termSelect.attr('data-old-value');

            if (yearId) {
                $.get('{{ url("admin/years") }}/' + yearId + '/terms', function(data) {
                    fillOptions('#term-select', data, '{{ __("dashboard.Select Term") }}', oldValue);
                    if (oldValue) {
                        termSelect.trigger('change');
                        termSelect.attr('data-old-value', '');
                    }
                });
            } else {
                fillOptions('#term-select', [], '{{ __("dashboard.Select Term") }}', '');
            }
            fillOptions('#stage-select', [], '{{ __("dashboard.Select Stage") }}', '');
            fillOptions('#grade-select', [], '{{ __("dashboard.Select Grade") }}', '');
        });

        $('#term-select').on('change', function () {
            const termId = $(this).val();
            const stageSelect = $('#stage-select');
            const oldValue = stageSelect.attr('data-old-value');

            if (termId) {
                $.get('{{ url("admin/terms") }}/' + termId + '/stages', function(data) {
                    fillOptions('#stage-select', data, '{{ __("dashboard.Select Stage") }}', oldValue);
                    if (oldValue) {
                        stageSelect.trigger('change');
                        stageSelect.attr('data-old-value', '');
                    }
                });
            } else {
                fillOptions('#stage-select', [], '{{ __("dashboard.Select Stage") }}', '');
            }
            fillOptions('#grade-select', [], '{{ __("dashboard.Select Grade") }}', '');
        });

        $('#stage-select').on('change', function () {
            const stageId = $(this).val();
            const gradeSelect = $('#grade-select');
            const oldValue = gradeSelect.attr('data-old-value');

            if (stageId) {
                $.get('{{ url("admin/stages") }}/' + stageId + '/grades', function(data) {
                    fillOptions('#grade-select', data, '{{ __("dashboard.Select Grade") }}', oldValue);
                    if (oldValue) {
                        gradeSelect.attr('data-old-value', '');
                    }
                });
            } else {
                fillOptions('#grade-select', [], '{{ __("dashboard.Select Grade") }}', '');
            }
        });

        if ($('#year-select').val()) {
            $('#year-select').trigger('change');
        }
    });
</script>
@endsection