@extends('layouts.admin')

@section('title', setting('school_name', 'ShulePoint') . ' | Inbox')
@section('page-title', 'Messages')

@section('content')
<div class="card card-outline card-primary shadow-sm">
    <div class="card-header">
        <h3 class="card-title"><i class="fas fa-comments mr-1"></i> Inbox</h3>
        <div class="card-tools"><a href="{{ route('messages.compose') }}" class="btn btn-sm btn-primary"><i class="fas fa-pen mr-1"></i> Compose</a></div>
    </div>
    <div class="card-body p-0">
        <div class="row no-gutters" style="min-height:480px;">
            {{-- Left: senders (one row per user) --}}
            <div class="col-md-4" style="background:#fff7ed;border-right:1px solid #fed7aa;">
                <div class="p-2">
                    @php
                        try {
                            $inboxSchoolMap = \Illuminate\Support\Facades\Cache::remember('shulepoint.school-map', 600, fn () => \App\Models\School::pluck('name', 'id')->all());
                        } catch (\Throwable $e) { $inboxSchoolMap = []; }
                        $showInboxSchool = \App\Support\CurrentSchool::id() === 'all';
                    @endphp
                    @forelse ($threads as $t)
                        @php $isOpen = isset($openSenderId) && $openSenderId == $t['sender_id']; @endphp
                        <a href="{{ route('messages.inbox', ['open' => $t['latest']->id]) }}"
                           class="d-flex align-items-center bg-white mb-2 {{ $t['unread'] > 0 ? 'font-weight-bold' : '' }}"
                           style="gap:.6rem;border-radius:.7rem;padding:.55rem .65rem;text-decoration:none;color:inherit;{{ $isOpen ? 'box-shadow:0 0 0 2px #f97316;' : 'box-shadow:0 1px 4px rgba(16,24,40,.08);' }}{{ $t['unread'] > 0 ? 'border-left:4px solid #f97316;' : '' }}">
                            <span style="width:38px;height:38px;border-radius:50%;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;font-weight:700;background:{{ $isOpen ? '#f97316' : '#ffedd5' }};color:{{ $isOpen ? '#fff' : '#c2410c' }};">
                                {{ strtoupper(substr($t['sender']->name ?? 'U', 0, 1)) }}
                            </span>
                            <span class="min-w-0" style="line-height:1.2;color:#0f2043;">
                                <span class="d-block" style="white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">{{ $t['sender']->name ?? 'User' }}</span>
                                <span class="d-block small text-muted">{{ ucfirst($t['sender']->role ?? 'user') }}{{ $t['total'] > 1 ? ' · '.$t['total'].' msgs' : '' }} · {{ $t['latest']->created_at->diffForHumans() }}</span>
                                @if($showInboxSchool && isset($inboxSchoolMap[$t['sender']->school_id ?? null]))
                                    <span class="adm-chip mt-1" style="display:inline-block;">{{ $inboxSchoolMap[$t['sender']->school_id] }}</span>
                                @endif
                                <span class="d-block small text-muted" style="white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">{{ \Illuminate\Support\Str::limit($t['latest']->body, 42) }}</span>
                            </span>
                            @if($t['unread'] > 0)
                                <span class="badge badge-warning ml-auto" style="flex-shrink:0;">{{ $t['unread'] }}</span>
                            @endif
                        </a>
                    @empty
                        <div class="text-center py-5 px-3 bg-white" style="border-radius:.7rem;">
                            <i class="fas fa-envelope-open fa-3x text-muted mb-3"></i>
                            <p class="font-weight-bold mb-1" style="color:#0f2043;">Inbox is clear</p>
                            <p class="text-muted small mb-0">Messages from other users will appear here.</p>
                        </div>
                    @endforelse
                </div>
            </div>
            {{-- Right: opened message --}}
            <div class="col-md-8">
                @if(isset($selected) && $selected)
                    <div class="p-3 border-bottom">
                        <h5 class="font-weight-bold mb-0">{{ $selected->subject ?: '(No subject)' }}</h5>
                        <p class="small text-muted mb-0">With {{ $selected->sender_id === auth()->id() ? ($selected->recipient->name ?? 'User') : ($selected->sender->name ?? 'User') }} · started {{ $selected->created_at->format('d M Y H:i') }}</p>
                    </div>
                    <div class="p-3" id="thread-body" style="max-height:420px;overflow-y:auto;">
                        @foreach ($thread as $m)
                            @php $mine = $m->sender_id === auth()->id(); @endphp
                            <div class="d-flex mb-2 {{ $mine ? 'justify-content-end' : 'justify-content-start' }}" data-msg-id="{{ $m->id }}">
                                <div style="max-width:min(560px,100%);background:{{ $mine ? '#1a56db' : '#f1f5f9' }};color:{{ $mine ? '#fff' : '#0f2043' }};border-radius:1rem;padding:.6rem .9rem;">
                                    <div class="small mb-1" style="opacity:.8;"><strong>{{ $m->sender->name ?? 'User' }}</strong> · {{ $m->created_at->format('d M H:i') }}</div>
                                    <div style="white-space:pre-line;">{{ $m->body }}</div>
                                    @if($m->has_attachment)
                                        <div class="mt-2">
                                            @if($m->is_image)
                                                <a href="{{ $m->attachmentUrl() }}" target="_blank"><img src="{{ $m->attachmentUrl() }}" alt="attachment" style="max-width:200px;border-radius:.5rem;"></a>
                                            @else
                                                <a href="{{ $m->attachmentUrl() }}" target="_blank" class="btn btn-sm {{ $mine ? 'btn-light' : 'btn-outline-primary' }}"><i class="fas {{ $m->is_pdf ? 'fa-file-pdf' : 'fa-paperclip' }} mr-1"></i>{{ \Illuminate\Support\Str::limit($m->attachment_name ?? 'Attachment', 26) }}</a>
                                            @endif
                                        </div>
                                    @endif
                                </div>
                            </div>
                        @endforeach
                    </div>
                    <div class="p-3 border-top">
                        <form action="{{ route('messages.store') }}" method="POST" enctype="multipart/form-data" id="pane-reply-form">
                            @csrf
                            <input type="hidden" name="parent_id" value="{{ $selected->id }}">
                            <input type="hidden" name="recipient_id" value="{{ $selected->sender_id === auth()->id() ? $selected->recipient_id : $selected->sender_id }}">
                            <div class="d-flex align-items-end" style="gap:.5rem;">
                                <div style="flex:1;position:relative;">
                                    <textarea name="body" rows="3" class="form-control form-control-sm" placeholder="Type a message…" required style="resize:none;padding-right:38px;min-height:84px;">{{ old('body') }}</textarea>
                                    <label for="pane-reply-file" title="Attach file" style="position:absolute;right:8px;bottom:10px;width:26px;height:26px;border-radius:50%;background:#fff;border:1px solid #e3e6eb;color:#64748b;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;margin:0;">
                                        <i class="fas fa-paperclip" style="font-size:.75rem;"></i>
                                    </label>
                                    <input type="file" name="attachment" id="pane-reply-file" class="d-none">
                                </div>
                                <button type="submit" id="pane-reply-btn" title="Send" style="width:42px;height:84px;border-radius:999px;background:linear-gradient(135deg,#f97316,#ea580c);color:#fff;border:0;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px rgba(249,115,22,.35);"><i class="fas fa-paper-plane" style="font-size:.9rem;"></i></button>
                            </div>
                            <div class="small text-muted mt-1" id="pane-file-name"></div>
                            <div class="progress mt-2 d-none" id="pane-reply-progress" style="height:8px;">
                                <div class="progress-bar progress-bar-striped progress-bar-animated" id="pane-reply-bar" role="progressbar" style="width:0%;background-color:#f97316;"></div>
                            </div>
                        </form>
                    </div>
                @else
                    <div class="d-flex flex-column align-items-center justify-content-center text-center p-5" style="min-height:480px;">
                        <i class="fas fa-comments fa-3x text-muted mb-3"></i>
                        <p class="font-weight-bold mb-1">Select a conversation</p>
                        <p class="text-muted small mb-3">Choose a sender on the left to read and reply —<br>unread counts show per person.</p>
                        <a href="{{ route('messages.compose') }}" class="btn btn-sm btn-primary"><i class="fas fa-pen mr-1"></i> New Message</a>
                    </div>
                @endif
            </div>
        </div>
    </div>
</div>

<div class="d-flex justify-content-center mt-3" style="padding:1.2rem 0;">
    <a href="{{ route('messages.compose') }}" class="text-center text-decoration-none" title="Compose new message">
        <span style="width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#f97316,#ea580c);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem;box-shadow:0 6px 16px rgba(249,115,22,.4);">
            <i class="fas fa-pen"></i>
        </span>
        <span class="d-block small font-weight-bold mt-1" style="color:#f97316;">Compose</span>
    </a>
</div>
@endsection

@push('scripts')
<script>
(function () {
    var threadBody = document.getElementById('thread-body');
    if (threadBody) threadBody.scrollTop = threadBody.scrollHeight;
    var form = document.getElementById('pane-reply-form');
    if (form) {
        var file = document.getElementById('pane-reply-file');
        var bar = document.getElementById('pane-reply-bar');
        var wrap = document.getElementById('pane-reply-progress');
        var btn = document.getElementById('pane-reply-btn');
        var fname = document.getElementById('pane-file-name');
        if (file) file.addEventListener('change', function () {
            if (fname) fname.textContent = file.files.length ? '📎 ' + file.files[0].name : '';
        });
        form.addEventListener('submit', function (e) {
            if (!file || !file.files.length) return;
            e.preventDefault();
            btn.disabled = true;
            wrap.classList.remove('d-none');
            var xhr = new XMLHttpRequest();
            xhr.open('POST', form.action, true);
            xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
            xhr.upload.addEventListener('progress', function (ev) {
                if (!ev.lengthComputable) return;
                bar.style.width = Math.round(ev.loaded / ev.total * 100) + '%';
            });
            xhr.addEventListener('load', function () { window.location.reload(); });
            xhr.addEventListener('error', function () {
                btn.disabled = false;
                alert('Upload failed — please try again.');
            });
            xhr.send(new FormData(form));
        });
    }
    @if(isset($selected) && $selected)
    (function () {
        var nodes = threadBody ? threadBody.querySelectorAll('[data-msg-id]') : [];
        var lastId = nodes.length ? parseInt(nodes[nodes.length - 1].getAttribute('data-msg-id'), 10) : 0;
        function esc(s) {
            return String(s == null ? '' : s).replace(/[&<>"']/g, function (c) {
                return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
            });
        }
        setInterval(function () {
            fetch("{{ route('messages.updates', $selected) }}?after_id=" + lastId, { headers: { 'X-Requested-With': 'XMLHttpRequest' } })
                .then(function (r) { return r.ok ? r.json() : null; })
                .then(function (data) {
                    if (!data || !Array.isArray(data.replies) || !data.replies.length || !threadBody) return;
                    data.replies.forEach(function (m) {
                        var wrap = document.createElement('div');
                        wrap.className = 'd-flex mb-2 ' + (m.mine ? 'justify-content-end' : 'justify-content-start');
                        wrap.setAttribute('data-msg-id', m.id);
                        var bg = m.mine ? '#1a56db' : '#f1f5f9';
                        var fg = m.mine ? '#fff' : '#0f2043';
                        var html = '<div style="max-width:min(560px,100%);background:' + bg + ';color:' + fg + ';border-radius:1rem;padding:.6rem .9rem;">'
                            + '<div class="small mb-1" style="opacity:.8;"><strong>' + esc(m.sender_name) + '</strong> · ' + esc(m.time) + '</div>'
                            + '<div style="white-space:pre-line;">' + esc(m.body) + '</div>';
                        if (m.has_attachment && m.attachment_url) {
                            html += '<div class="mt-2">';
                            if (m.is_image) {
                                html += '<a href="' + esc(m.attachment_url) + '" target="_blank"><img src="' + esc(m.attachment_url) + '" style="max-width:200px;border-radius:.5rem;"></a>';
                            } else {
                                html += '<a href="' + esc(m.attachment_url) + '" target="_blank" class="btn btn-sm ' + (m.mine ? 'btn-light' : 'btn-outline-primary') + '"><i class="fas fa-paperclip mr-1"></i>' + esc((m.attachment_name || 'Attachment').substring(0, 26)) + '</a>';
                            }
                            html += '</div>';
                        }
                        html += '</div>';
                        wrap.innerHTML = html;
                        threadBody.appendChild(wrap);
                        if (m.id > lastId) lastId = m.id;
                    });
                    threadBody.scrollTop = threadBody.scrollHeight;
                })
                .catch(function () {});
        }, 10000);
    })();
    @endif
})();
</script>
@endpush