@extends('layouts.app')
@section('title', 'Subject Management')
@section('page-title', 'Subject Management')

@section('content')
<div class="space-y-6">

    {{-- Success/Error Messages --}}
    @if(session('success'))
    <div class="bg-green-50 border border-green-200 text-green-700 px-4 py-3 rounded-xl text-sm">
        <i class="fas fa-check-circle mr-1"></i> {{ session('success') }}
    </div>
    @endif
    @if(session('error'))
    <div class="bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded-xl text-sm">
        <i class="fas fa-exclamation-circle mr-1"></i> {{ session('error') }}
    </div>
    @endif

    <div class="grid grid-cols-1 lg:grid-cols-3 gap-6">

        {{-- Left: Create Subject Form --}}
        <div class="lg:col-span-1">
            <div class="bg-white rounded-xl shadow-sm border border-gray-100 p-6 sticky top-6">
                <h3 class="text-lg font-semibold text-gray-900 mb-4">
                    <i class="fas fa-plus-circle text-primary-600 mr-2"></i> Add New Subject
                </h3>
                <form method="POST" action="{{ route('admin.subjects.store') }}" class="space-y-4">
                    @csrf
                    <div>
                        <label class="block text-sm font-medium text-gray-700 mb-1">Subject Name <span class="text-red-500">*</span></label>
                        <input type="text" name="name" value="{{ old('name') }}" required placeholder="e.g., Mathematics"
                               class="w-full border border-gray-300 rounded-lg px-3 py-2 text-sm @error('name') border-red-500 @enderror">
                        @error('name') <p class="text-red-500 text-xs mt-1">{{ $message }}</p> @enderror
                    </div>
                    <div>
                        <label class="block text-sm font-medium text-gray-700 mb-1">Subject Code <span class="text-red-500">*</span></label>
                        <input type="text" name="code" value="{{ old('code') }}" required placeholder="e.g., MATH"
                               class="w-full border border-gray-300 rounded-lg px-3 py-2 text-sm @error('code') border-red-500 @enderror">
                        @error('code') <p class="text-red-500 text-xs mt-1">{{ $message }}</p> @enderror
                    </div>
                    <div>
                        <label class="block text-sm font-medium text-gray-700 mb-1">Description</label>
                        <textarea name="description" rows="3" placeholder="Brief description of the subject..."
                                  class="w-full border border-gray-300 rounded-lg px-3 py-2 text-sm">{{ old('description') }}</textarea>
                    </div>
                    <button type="submit" class="w-full bg-primary-600 text-white py-2.5 rounded-lg text-sm font-medium hover:bg-primary-700 transition">
                        <i class="fas fa-save mr-1"></i> Create Subject
                    </button>
                </form>
            </div>
        </div>

        {{-- Right: Subjects List --}}
        <div class="lg:col-span-2">
            <div class="bg-white rounded-xl shadow-sm border border-gray-100 overflow-hidden">
                <table class="w-full">
                    <thead class="bg-gray-50 border-b border-gray-100">
                        <tr>
                            <th class="px-4 py-3 text-left text-xs font-semibold text-gray-600 uppercase">Subject</th>
                            <th class="px-4 py-3 text-left text-xs font-semibold text-gray-600 uppercase">Code</th>
                            <th class="px-4 py-3 text-center text-xs font-semibold text-gray-600 uppercase">Classes</th>
                            <th class="px-4 py-3 text-center text-xs font-semibold text-gray-600 uppercase">Status</th>
                            <th class="px-4 py-3 text-center text-xs font-semibold text-gray-600 uppercase">Actions</th>
                        </tr>
                    </thead>
                    <tbody class="divide-y divide-gray-50">
                        @forelse($subjects as $subject)
                        <tr class="hover:bg-gray-50 transition" x-data="{ editing: false }">
                            {{-- View Mode --}}
                            <td class="px-4 py-3" x-show="!editing">
                                <div>
                                    <p class="font-medium text-gray-900 text-sm">{{ $subject->name }}</p>
                                    @if($subject->description)
                                        <p class="text-xs text-gray-500 truncate max-w-xs">{{ $subject->description }}</p>
                                    @endif
                                </div>
                            </td>
                            <td class="px-4 py-3 text-sm text-gray-700" x-show="!editing">
                                <span class="inline-flex items-center px-2 py-0.5 rounded bg-gray-100 text-gray-700 text-xs font-mono">
                                    {{ $subject->code }}
                                </span>
                            </td>
                            <td class="px-4 py-3 text-center text-sm text-gray-700" x-show="!editing">
                                {{ $subject->classes_count }}
                            </td>
                            <td class="px-4 py-3 text-center" x-show="!editing">
                                @if($subject->is_active)
                                    <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">Active</span>
                                @else
                                    <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800">Inactive</span>
                                @endif
                            </td>
                            <td class="px-4 py-3 text-center" x-show="!editing">
                                <div class="flex items-center justify-center gap-2">
                                    <button @click="editing = true" class="text-yellow-600 hover:text-yellow-800 text-sm" title="Edit">
                                        <i class="fas fa-edit"></i>
                                    </button>
                                    <form method="POST" action="{{ route('admin.subjects.toggle-status', $subject) }}" class="inline">
                                        @csrf @method('PATCH')
                                        <button type="submit" class="text-sm" title="{{ $subject->is_active ? 'Deactivate' : 'Activate' }}">
                                            <i class="fas {{ $subject->is_active ? 'fa-toggle-on text-green-600' : 'fa-toggle-off text-gray-400' }}"></i>
                                        </button>
                                    </form>
                                    @if($subject->classes_count === 0)
                                    <form method="POST" action="{{ route('admin.subjects.destroy', $subject) }}" class="inline"
                                          onsubmit="return confirm('Delete this subject?')">
                                        @csrf @method('DELETE')
                                        <button type="submit" class="text-red-500 hover:text-red-700 text-sm" title="Delete">
                                            <i class="fas fa-trash"></i>
                                        </button>
                                    </form>
                                    @endif
                                </div>
                            </td>

                            {{-- Edit Mode (inline) --}}
                            <td colspan="5" x-show="editing" x-cloak class="px-4 py-3">
                                <form method="POST" action="{{ route('admin.subjects.update', $subject) }}" class="flex flex-wrap items-end gap-3">
                                    @csrf @method('PUT')
                                    <div class="flex-1 min-w-[150px]">
                                        <label class="block text-xs text-gray-500 mb-1">Name</label>
                                        <input type="text" name="name" value="{{ $subject->name }}" required
                                               class="w-full border border-gray-300 rounded px-2 py-1.5 text-sm">
                                    </div>
                                    <div class="w-24">
                                        <label class="block text-xs text-gray-500 mb-1">Code</label>
                                        <input type="text" name="code" value="{{ $subject->code }}" required
                                               class="w-full border border-gray-300 rounded px-2 py-1.5 text-sm">
                                    </div>
                                    <div class="flex-1 min-w-[150px]">
                                        <label class="block text-xs text-gray-500 mb-1">Description</label>
                                        <input type="text" name="description" value="{{ $subject->description }}"
                                               class="w-full border border-gray-300 rounded px-2 py-1.5 text-sm">
                                    </div>
                                    <div class="flex gap-2">
                                        <button type="submit" class="px-3 py-1.5 text-xs text-white bg-primary-600 rounded hover:bg-primary-700">Save</button>
                                        <button type="button" @click="editing = false" class="px-3 py-1.5 text-xs text-gray-600 bg-gray-100 rounded hover:bg-gray-200">Cancel</button>
                                    </div>
                                </form>
                            </td>
                        </tr>
                        @empty
                        <tr>
                            <td colspan="5" class="px-4 py-12 text-center text-gray-500">
                                <i class="fas fa-book text-4xl mb-3"></i>
                                <p>No subjects created yet.</p>
                            </td>
                        </tr>
                        @endforelse
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>
@endsection