@extends('school.layouts.app')
@section('content')
<div class="p-6 lg:p-8 w-full">

    {{-- Top Bar --}}
    <div class="flex flex-wrap items-center justify-between gap-4 mb-6">
        <div class="flex items-center gap-3">
            <a href="{{ route('school.homework.index') }}" class="w-9 h-9 bg-white border border-slate-200 rounded-lg flex items-center justify-center text-slate-500 shadow-sm hover:bg-slate-50 transition-colors">
                <i class="fa-solid fa-arrow-left text-xs"></i>
            </a>
            <div>
                <div class="flex items-center gap-2">
                    <h1 class="text-xl font-black text-slate-800 tracking-tight">{{ $homework->title ?: 'Untitled Broadcast' }}</h1>
                    <span class="px-2.5 py-1 rounded-lg text-[10px] font-black uppercase {{ $homework->status == 'published' ? 'bg-emerald-100 text-emerald-700' : ($homework->status == 'pending' ? 'bg-amber-100 text-amber-700' : 'bg-red-100 text-red-700') }}">{{ $homework->status }}</span>
                </div>
                <p class="text-xs text-slate-500 mt-0.5">{{ \Carbon\Carbon::parse($homework->created_at)->format('d M, Y h:i A') }} • {{ $homework->staff_name }} ({{ $homework->designation }})</p>
            </div>
        </div>

        @if($homework->status == 'pending')
        <div class="flex gap-2">
            <form action="{{ route('school.homework.reject', $homework->id) }}" method="POST">@csrf @method('PATCH')
                <button class="px-5 py-2.5 rounded-xl border border-red-200 text-red-600 text-xs font-black uppercase tracking-wider hover:bg-red-50 transition-colors">
                    <i class="fa-solid fa-xmark mr-1"></i> Reject
                </button>
            </form>
            <form action="{{ route('school.homework.approve', $homework->id) }}" method="POST">@csrf @method('PATCH')
                <button class="px-5 py-2.5 rounded-xl bg-emerald-500 hover:bg-emerald-600 text-white text-xs font-black uppercase tracking-wider shadow-md shadow-emerald-200 transition-colors">
                    <i class="fa-solid fa-check mr-1"></i> Approve & Publish
                </button>
            </form>
        </div>
        @endif
    </div>

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

        {{-- Main Content --}}
        <div class="xl:col-span-2 bg-white rounded-2xl border border-slate-200 shadow-sm p-6">
            <p class="text-[10px] font-black text-slate-400 uppercase tracking-widest mb-3">
                <i class="fa-solid fa-book-open text-indigo-400 mr-1"></i> {{ $homework->subject_name ?? 'General Subject' }}
            </p>
            <div class="text-sm text-slate-600 leading-relaxed whitespace-pre-line mb-6 bg-slate-50 p-4 rounded-xl border border-slate-100">{{ $homework->message }}</div>

            @if($homework->attachment)
            <a href="{{ asset('storage/'.$homework->attachment) }}" target="_blank" class="inline-flex items-center gap-2 px-5 py-3 bg-indigo-50 border border-indigo-100 rounded-xl text-sm font-bold text-indigo-700 hover:bg-indigo-100 transition-colors">
                <i class="fa-solid fa-file-arrow-down"></i> Download Attachment
            </a>
            @endif
        </div>

        {{-- Targeted Audience --}}
        <div class="bg-white rounded-2xl border border-slate-200 shadow-sm p-6 h-fit">
            <h4 class="text-[10px] font-black text-slate-400 uppercase tracking-widest mb-4">Targeted Audience</h4>
            <div class="flex flex-wrap gap-2">
                @forelse($targets as $t)
                <span class="px-3 py-1.5 bg-slate-50 border border-slate-200 rounded-lg text-xs font-bold text-slate-600">
                    @if($t->student_name) <i class="fa-solid fa-user text-indigo-400 mr-1"></i> {{ $t->student_name }}
                    @else <i class="fa-solid fa-chalkboard text-indigo-400 mr-1"></i> {{ $t->class_name }} {{ $t->section_name ? '- '.$t->section_name : '' }} @endif
                </span>
                @empty
                <p class="text-xs text-slate-400 italic">No specific targets</p>
                @endforelse
            </div>
        </div>
    </div>

    {{-- ✅ PROFESSIONAL DESKTOP CHAT VIEW --}}
    <div class="bg-white rounded-2xl border border-slate-200 shadow-sm mt-6 overflow-hidden">
        {{-- Chat Header --}}
        <div class="bg-gradient-to-r from-indigo-500 to-indigo-600 px-6 py-4 border-b border-indigo-600">
            <h4 class="text-sm font-black text-white uppercase tracking-wider flex items-center gap-2">
                <i class="fa-solid fa-comments"></i> Conversation Thread
                <span class="ml-2 bg-white/20 text-white text-[10px] font-bold px-2 py-0.5 rounded-full">{{ $replies->count() }} Messages</span>
            </h4>
        </div>

        {{-- Chat Messages Container --}}
        <div class="p-6 space-y-4 max-h-[500px] overflow-y-auto custom-scrollbar" id="chatContainer">
            @forelse($replies as $reply)
                @php 
                    $isAdmin = !empty($reply->staff_id); 
                    $isStudent = !empty($reply->student_id);
                @endphp
                
                <div class="flex {{ $isAdmin ? 'justify-end' : 'justify-start' }}">
                    <div class="max-w-[75%] flex {{ $isAdmin ? 'flex-row-reverse' : 'flex-row' }} items-end gap-3">
                        {{-- Avatar --}}
                        <div class="w-10 h-10 rounded-full flex items-center justify-center text-xs font-black flex-shrink-0 shadow-md
                            {{ $isAdmin ? 'bg-indigo-100 text-indigo-600 ring-2 ring-indigo-200' : 'bg-emerald-100 text-emerald-600 ring-2 ring-emerald-200' }}">
                            @if($isAdmin)
                                <i class="fa-solid fa-user-shield"></i>
                            @else
                                {{ substr($reply->student_name ?? 'S', 0, 1) }}
                            @endif
                        </div>
                        
                        {{-- Message Bubble --}}
                        <div class="relative">
                            <div class="px-4 py-3 rounded-2xl shadow-sm text-sm leading-relaxed
                                {{ $isAdmin ? 'bg-indigo-600 text-white rounded-br-none' : 'bg-slate-100 text-slate-700 rounded-bl-none border border-slate-200' }}">
                                
                                {{-- Sender Name --}}
                                <p class="font-bold text-[10px] mb-1 uppercase tracking-wider
                                    {{ $isAdmin ? 'text-indigo-200' : 'text-slate-500' }}">
                                    {{ $isAdmin ? 'School Admin' : $reply->student_name }}
                                </p>
                                
                                {{-- Message --}}
                                <p class="whitespace-pre-line">{{ $reply->message }}</p>
                                
                                {{-- Attachment --}}
                                @if($reply->attachment)
                                <a href="{{ asset('storage/'.$reply->attachment) }}" target="_blank" 
                                   class="mt-2 inline-flex items-center gap-1.5 text-[11px] font-bold underline
                                    {{ $isAdmin ? 'text-indigo-200 hover:text-white' : 'text-indigo-600 hover:text-indigo-700' }}">
                                    <i class="fa-solid fa-paperclip"></i> View Attachment
                                </a>
                                @endif
                            </div>
                            
                            {{-- Timestamp --}}
                            <p class="text-[9px] mt-1 {{ $isAdmin ? 'text-slate-400 text-right' : 'text-slate-400' }} font-semibold">
                                {{ \Carbon\Carbon::parse($reply->created_at)->format('d M, h:i A') }}
                            </p>
                        </div>
                    </div>
                </div>
            @empty
                <div class="text-center py-12">
                    <div class="w-16 h-16 bg-slate-100 rounded-full flex items-center justify-center mx-auto mb-3">
                        <i class="fa-solid fa-comments text-2xl text-slate-300"></i>
                    </div>
                    <p class="text-sm text-slate-400 italic">No messages yet. Start the conversation below.</p>
                </div>
            @endforelse
        </div>

        {{-- Reply Form --}}
        <form action="{{ route('school.homework.reply', $homework->id) }}" method="POST" enctype="multipart/form-data" 
              class="border-t border-slate-200 bg-slate-50 p-4">
            @csrf
            <div class="flex items-end gap-3">
                <label for="adminReplyAttach" class="w-11 h-11 bg-white border border-slate-200 rounded-xl flex items-center justify-center text-slate-500 cursor-pointer hover:bg-indigo-50 hover:text-indigo-600 hover:border-indigo-300 transition-all flex-shrink-0 shadow-sm">
                    <i class="fa-solid fa-paperclip text-sm"></i>
                    <input type="file" name="attachment" id="adminReplyAttach" class="hidden" accept=".jpg,.jpeg,.png,.pdf,.doc,.docx">
                </label>
                <div class="flex-1">
                    <textarea name="message" rows="2" required placeholder="Reply to students..." 
                              class="w-full bg-white border border-slate-200 rounded-xl py-3 px-4 text-sm text-slate-700 focus:ring-2 focus:ring-indigo-500/20 focus:border-indigo-500 outline-none resize-none shadow-sm"
                              id="replyTextarea"></textarea>
                    <p id="attachedFileName" class="text-[10px] text-indigo-600 font-bold mt-1 hidden"></p>
                </div>
                <button type="submit" class="h-11 px-6 bg-indigo-600 hover:bg-indigo-700 text-white rounded-xl text-sm font-bold shadow-md shadow-indigo-200 transition-all flex items-center gap-2 active:scale-95">
                    Send <i class="fa-solid fa-paper-plane text-xs"></i>
                </button>
            </div>
        </form>
    </div>
</div>

<style>
.custom-scrollbar::-webkit-scrollbar { width: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: #f1f5f9; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 10px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #94a3b8; }
</style>

<script>
// Auto-resize textarea
const textarea = document.getElementById('replyTextarea');
textarea.addEventListener('input', function() {
    this.style.height = 'auto';
    this.style.height = Math.min(this.scrollHeight, 120) + 'px';
});

// Show attached filename
document.getElementById('adminReplyAttach').addEventListener('change', function() {
    const nameEl = document.getElementById('attachedFileName');
    if(this.files && this.files[0]) {
        nameEl.textContent = '📎 ' + this.files[0].name;
        nameEl.classList.remove('hidden');
    } else {
        nameEl.classList.add('hidden');
    }
});

// Auto-scroll to bottom on load
window.addEventListener('load', function() {
    const chatContainer = document.getElementById('chatContainer');
    chatContainer.scrollTop = chatContainer.scrollHeight;
});
</script>
@endsection