@extends('layouts.app')

@section('content')
<div class="max-w-7xl mx-auto space-y-8">
    <div class="flex flex-col md:flex-row justify-between items-start md:items-center gap-4 mb-4">
        <div class="flex items-center gap-4">
            <a href="{{ route('staff.subjects.index') }}" class="btn-icon-slate">
                <span class="material-icons-round">arrow_back</span>
            </a>
            <div>
                <h2 class="text-3xl font-black text-slate-800 tracking-tight">Teaching History</h2>
                <p class="text-slate-500 mt-1">Review all your previously selected and assigned subjects</p>
            </div>
        </div>
        
        <div class="flex items-center gap-3">
            <a href="{{ route('staff.subjects.previous', ['export' => 'xlsx']) }}" class="btn-primary flex items-center gap-2 px-6 bg-emerald-600 hover:bg-emerald-700 shadow-emerald-100">
                <span class="material-icons-round text-sm">download</span>
                Export History
            </a>
        </div>
    </div>

    <div class="glass-panel overflow-hidden rounded-2xl bg-white border border-slate-200 shadow-lg shadow-slate-200/50">
        <div class="overflow-x-auto">
            <table class="w-full text-left text-slate-600">
                <thead class="bg-slate-50 text-xs uppercase font-bold text-slate-500 border-b border-slate-100">
                    <tr>
                        <th class="px-6 py-4">Subject</th>
                        <th class="px-6 py-4">Semester</th>
                        <th class="px-6 py-4">Category</th>
                        <th class="px-6 py-4">Date Assigned</th>
                    </tr>
                </thead>
                <tbody class="divide-y divide-slate-100">
                    @forelse($previousSubjects as $subject)
                    <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-10 h-10 rounded-xl bg-indigo-50 flex items-center justify-center text-indigo-500 border border-indigo-100">
                                    <span class="material-icons-round text-sm">auto_stories</span>
                                </div>
                                <div>
                                    <p class="font-bold text-slate-800">{{ $subject->name }}</p>
                                    <p class="text-xs text-slate-500 font-mono">{{ $subject->code }}</p>
                                </div>
                            </div>
                        </td>
                        <td class="px-6 py-4">
                            <span class="px-3 py-1 rounded-full bg-slate-100 text-slate-600 text-xs font-bold border border-slate-200">
                                {{ $subject->semester->name ?? 'N/A' }}
                            </span>
                        </td>
                        <td class="px-6 py-4">
                            <span class="text-sm font-medium text-slate-700">
                                {{ $subject->category->name ?? 'No Category' }}
                            </span>
                        </td>
                        <td class="px-6 py-4 text-sm text-slate-500">
                            {{ $subject->pivot->created_at ? $subject->pivot->created_at->format('M d, Y') : 'N/A' }}
                        </td>
                    </tr>
                    @empty
                    <tr>
                        <td colspan="4" class="px-6 py-12 text-center">
                            <div class="flex flex-col items-center">
                                <span class="material-icons-round text-4xl text-slate-200 mb-2">history</span>
                                <p class="text-slate-500">You haven't been assigned to any subjects yet.</p>
                                <a href="{{ route('staff.subjects.index') }}" class="mt-4 text-indigo-600 font-bold hover:underline">Select Subjects Now</a>
                            </div>
                        </td>
                    </tr>
                    @endforelse
                </tbody>
            </table>
        </div>
        
        @if($previousSubjects->hasPages())
        <div class="p-6 border-t border-slate-50">
            {{ $previousSubjects->links() }}
        </div>
        @endif
    </div>
</div>
@endsection