@extends('layouts.app')

@section('content')
<div class="max-w-7xl mx-auto space-y-6">
    <!-- Header -->
    <div class="flex items-center justify-between">
        <div>
            <h1 class="text-3xl font-black text-slate-900">Student Allocations</h1>
            <p class="text-slate-500 mt-1">Monitor and manage all subject-staff-student links</p>
        </div>
    </div>

    <!-- Filters -->
    <div class="glass-panel p-6 rounded-2xl bg-white border border-slate-200">
        <form action="{{ route('admin.allocations.index') }}" method="GET" class="grid grid-cols-1 md:grid-cols-4 gap-4">
            <div>
                <label class="text-xs font-bold text-slate-400 uppercase tracking-widest block mb-2">Student</label>
                <input type="text" name="student" value="{{ request('student') }}" 
                       class="form-input w-full" placeholder="Name or ID...">
            </div>
            <div>
                <label class="text-xs font-bold text-slate-400 uppercase tracking-widest block mb-2">Staff</label>
                <input type="text" name="staff" value="{{ request('staff') }}" 
                       class="form-input w-full" placeholder="Faculty name...">
            </div>
            <div>
                <label class="text-xs font-bold text-slate-400 uppercase tracking-widest block mb-2">Subject</label>
                <input type="text" name="subject" value="{{ request('subject') }}" 
                       class="form-input w-full" placeholder="Code or Name...">
            </div>
            <div class="flex items-end gap-2">
                <button type="submit" class="btn-primary flex-1">
                    <span class="material-icons-round text-sm mr-2">search</span>
                    Filter
                </button>
                <a href="{{ route('admin.allocations.index') }}" class="btn-secondary">
                    <span class="material-icons-round text-sm">refresh</span>
                </a>
            </div>
        </form>
    </div>

    <!-- Allocation Table -->
    <div class="bg-white rounded-2xl shadow-lg border border-slate-200 overflow-hidden">
        <div class="overflow-x-auto">
            <table class="w-full text-left border-collapse">
                <thead class="bg-slate-50 border-b border-slate-100">
                    <tr>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em]">Student</th>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em]">Subject</th>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em]">Faculty</th>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em]">Timetable</th>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em]">Allocated At</th>
                        <th class="px-6 py-4 text-xs font-black text-slate-400 uppercase tracking-[0.1em] text-right">Actions</th>
                    </tr>
                </thead>
                <tbody class="divide-y divide-slate-50">
                    @forelse($allocations as $allocation)
                    <tr class="hover:bg-slate-50 transition-colors group">
                        <td class="px-6 py-4">
                            <div class="flex items-center gap-3">
                                <div class="w-9 h-9 rounded-xl bg-indigo-50 flex items-center justify-center font-bold text-indigo-600 text-sm">
                                    {{ strtoupper(substr($allocation->student->name,0,1)) }}
                                </div>
                                <div>
                                    <p class="font-bold text-slate-900 text-sm">{{ $allocation->student->name }}</p>
                                    <p class="text-[10px] text-slate-400 font-bold tracking-wider uppercase">{{ $allocation->student->student_id }}</p>
                                </div>
                            </div>
                        </td>
                        <td class="px-6 py-4">
                            <p class="font-bold text-slate-900 text-sm">{{ $allocation->subject->name }}</p>
                            <p class="text-xs text-slate-500">{{ $allocation->subject->code }}</p>
                        </td>
                        <td class="px-6 py-4">
                            <div class="flex items-center gap-2">
                                <span class="material-icons-round text-slate-400 text-sm">person</span>
                                <span class="text-sm font-medium text-slate-700">{{ $allocation->staff->name }}</span>
                            </div>
                        </td>
                        <td class="px-6 py-4">
                            <div class="flex items-center gap-2">
                                <span class="material-icons-round text-slate-400 text-sm">event_note</span>
                                <span class="text-sm font-medium text-slate-700">{{ $allocation->timetable?->name ?? 'N/A' }}</span>
                            </div>
                        </td>
                        <td class="px-6 py-4 text-xs text-slate-500 font-medium">
                            {{ $allocation->created_at->format('M d, Y') }}
                        </td>
                        <td class="px-6 py-4 text-right">
                            <form action="{{ route('admin.allocations.destroy', $allocation) }}" method="POST" 
                                  onsubmit="return confirm('Are you sure you want to remove this allocation?')" class="inline">
                                @csrf
                                @method('DELETE')
                                <button type="submit" class="p-2 text-slate-400 hover:text-red-500 transition-colors">
                                    <span class="material-icons-round text-base">delete</span>
                                </button>
                            </form>
                        </td>
                    </tr>
                    @empty
                    <tr>
                        <td colspan="6" class="px-6 py-12 text-center">
                            <div class="flex flex-col items-center">
                                <span class="material-icons-round text-slate-200 text-6xl mb-4">assignment_late</span>
                                <p class="text-slate-500 font-black text-lg">No allocations found</p>
                                <p class="text-slate-400 text-sm">Students haven't made any subject selections yet.</p>
                            </div>
                        </td>
                    </tr>
                    @endforelse
                </tbody>
            </table>
        </div>

        @if($allocations->hasPages())
        <div class="px-6 py-4 bg-slate-50 border-t border-slate-100">
            {{ $allocations->links() }}
        </div>
        @endif
    </div>
</div>
@endsection