@extends('layouts.app')

@section('title', 'Conversation: ' . ($conversation->subject ?? 'Messages'))

@section('content')
<div class="container-fluid px-4">
    {{-- Breadcrumb --}}
    <div class="d-flex flex-wrap align-items-center justify-content-between mb-4">
        <div>
            <nav aria-label="breadcrumb">
                <ol class="breadcrumb mb-1">
                    <li class="breadcrumb-item"><a href="{{ route('account.dashboard') }}">Account</a></li>
                    <li class="breadcrumb-item"><a href="{{ route('account.messages.index') }}">Messages</a></li>
                    <li class="breadcrumb-item active" aria-current="page">Conversation</li>
                </ol>
            </nav>
            <h1 class="h3 mb-0 fw-700">
                {{ $conversation->subject ?? 'Conversation' }}
            </h1>
        </div>
        <div class="d-flex gap-2">
            <button type="button"
                    class="btn btn-sm btn-outline-danger"
                    onclick="deleteConversation({{ $conversation->id }})">
                <i class="fas fa-trash me-1"></i> Remove
            </button>
            <a href="{{ route('account.messages.index') }}" class="btn btn-sm btn-outline-secondary">
                <i class="fas fa-arrow-left me-1"></i> Back to Inbox
            </a>
        </div>
    </div>

    <div class="row g-4">
        {{-- Conversation Panel --}}
        <div class="col-lg-8">
            @php
                $userId = auth()->id();
                $otherUser = (int) $conversation->sender_id === (int) $userId
                    ? $conversation->receiver
                    : $conversation->sender;
                $otherName = $otherUser?->username
                    ?: trim(($otherUser?->first_name ?? '') . ' ' . ($otherUser?->last_name ?? ''))
                    ?: 'Unknown User';
            @endphp

            <div class="card border-0 shadow-sm">
                {{-- Header --}}
                <div class="card-header bg-white border-0 py-3">
                    <div class="d-flex align-items-center justify-content-between gap-2">
                        <div class="d-flex align-items-center gap-2">
                            @if($otherUser?->avatar)
                                <img src="{{ asset('storage/' . $otherUser->avatar) }}"
                                     alt="{{ $otherName }}"
                                     class="rounded-circle"
                                     width="42" height="42"
                                     style="object-fit:cover;">
                            @else
                                <div class="rounded-circle bg-primary bg-opacity-10 d-flex align-items-center justify-content-center"
                                     style="width:42px;height:42px;">
                                    <span class="text-primary fw-600">
                                        {{ strtoupper(substr($otherName, 0, 2)) }}
                                    </span>
                                </div>
                            @endif
                            <div>
                                <div class="fw-700">{{ $otherName }}</div>
                                @if($otherUser?->email)
                                    <small class="text-muted">{{ $otherUser->email }}</small>
                                @endif
                            </div>
                        </div>
                        @if($conversation->product)
                            <a href="{{ route('storefront.products.show', $conversation->product) }}"
                               target="_blank"
                               class="badge bg-info text-decoration-none">
                                <i class="fas fa-cube me-1"></i>
                                {{ Str::limit($conversation->product->details->first()?->title ?? 'Product', 30) }}
                            </a>
                        @endif
                    </div>
                </div>

                {{-- Messages --}}
                <div class="card-body p-3" style="max-height:600px;overflow-y:auto;background:#f8f9fa;" id="messagesContainer">
                    @forelse($messages as $message)
                        @include('account.messages.partials.message-bubble', [
                            'message' => $message,
                            'userId' => $userId,
                        ])
                    @empty
                        <div class="text-center py-5">
                            <i class="fas fa-comment-slash fa-3x text-muted mb-3 d-block opacity-25"></i>
                            <h6 class="text-muted">No messages in this conversation</h6>
                        </div>
                    @endforelse
                </div>

                {{-- Pagination --}}
                @if($messages->hasPages())
                    <div class="card-footer bg-white border-top py-2">
                        <div class="d-flex justify-content-center">
                            {{ $messages->appends(request()->except('page'))->links() }}
                        </div>
                    </div>
                @endif

                {{-- Reply Form --}}
                <div class="card-footer bg-white border-top py-3">
                    @can('send', $conversation)
                        <form action="{{ route('account.messages.reply', $conversation) }}"
                              method="POST"
                              id="replyForm">
                            @csrf
                            <div class="mb-2">
                                <textarea name="message"
                                          id="replyMessage"
                                          class="form-control @error('message') is-invalid @enderror"
                                          rows="3"
                                          required
                                          maxlength="10000"
                                          placeholder="Type your reply...">{{ old('message') }}</textarea>
                                @error('message')
                                    <div class="invalid-feedback">{{ $message }}</div>
                                @enderror
                            </div>
                            <div class="d-flex justify-content-between align-items-center">
                                <small class="text-muted">
                                    <span id="replyCharCount">0</span> / 10,000
                                </small>
                                <button type="submit" class="btn btn-primary" id="replyBtn">
                                    <i class="fas fa-paper-plane me-1"></i> Send Reply
                                </button>
                            </div>
                        </form>
                    @else
                        <div class="alert alert-warning mb-0">
                            <i class="fas fa-lock me-2"></i>
                            You cannot reply to this conversation.
                        </div>
                    @endcan
                </div>
            </div>
        </div>

        {{-- Sidebar --}}
        <div class="col-lg-4">
            <div class="card border-0 shadow-sm mb-3">
                <div class="card-body">
                    <h6 class="fw-700 mb-3">
                        <i class="fas fa-info-circle text-primary me-2"></i>Conversation Details
                    </h6>
                    <dl class="row mb-0 small">
                        <dt class="col-5 text-muted">Started</dt>
                        <dd class="col-7">{{ $conversation->created_at?->format('M d, Y') ?? 'N/A' }}</dd>

                        <dt class="col-5 text-muted">Last Update</dt>
                        <dd class="col-7">{{ $conversation->updated_at?->diffForHumans() ?? 'N/A' }}</dd>

                        <dt class="col-5 text-muted">Messages</dt>
                        <dd class="col-7">{{ number_format($messages->total()) }}</dd>

                        @if($conversation->product)
                            <dt class="col-5 text-muted">Product</dt>
                            <dd class="col-7">
                                <a href="{{ route('storefront.products.show', $conversation->product) }}"
                                   target="_blank"
                                   class="text-decoration-none small">
                                    {{ Str::limit($conversation->product->details->first()?->title ?? 'Product', 30) }}
                                </a>
                            </dd>
                        @endif
                    </dl>
                </div>
            </div>

            <div class="alert alert-info">
                <i class="fas fa-shield-alt me-2"></i>
                <strong>Safety Tip:</strong> Keep all communication on this platform. Never share
                personal or financial information.
            </div>
        </div>
    </div>
</div>

{{-- Hidden Form for Delete --}}
<form id="deleteConversationForm" method="POST" action="" style="display:none;">
    @csrf
    @method('DELETE')
</form>
@endsection

@push('styles')
<style>
    .fw-600 { font-weight: 600; }
    .fw-700 { font-weight: 700; }
    .min-width-0 { min-width: 0; }
    .message-bubble {
        max-width: 70%;
        padding: 0.75rem 1rem;
        border-radius: 1rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    .message-mine {
        background: #0d6efd;
        color: #fff;
        border-bottom-right-radius: 0.25rem;
    }
    .message-theirs {
        background: #fff;
        color: #212529;
        border: 1px solid #e9ecef;
        border-bottom-left-radius: 0.25rem;
    }
    .message-time {
        font-size: 0.75rem;
        opacity: 0.75;
        margin-top: 0.25rem;
    }
    .message-row {
        margin-bottom: 1rem;
    }
</style>
@endpush

@push('scripts')
<script>
document.addEventListener('DOMContentLoaded', function() {
    var messageInput = document.getElementById('replyMessage');
    var charCount = document.getElementById('replyCharCount');
    var form = document.getElementById('replyForm');
    var submitBtn = document.getElementById('replyBtn');
    var container = document.getElementById('messagesContainer');

    // Auto-scroll to bottom
    if (container) {
        container.scrollTop = container.scrollHeight;
    }

    // Character counter
    if (messageInput && charCount) {
        var updateCount = function() {
            charCount.textContent = messageInput.value.length;
            charCount.parentElement.classList.toggle(
                'text-danger',
                messageInput.value.length > 9500
            );
        };
        messageInput.addEventListener('input', updateCount);
        updateCount();
    }

    // Prevent double submission
    if (form && submitBtn) {
        form.addEventListener('submit', function() {
            submitBtn.disabled = true;
            submitBtn.innerHTML = '<i class="fas fa-spinner fa-spin me-1"></i> Sending...';
        });
    }
});

function deleteConversation(conversationId) {
    if (!confirm('Remove this conversation from your inbox?\n\nThe other person can still see it, but it will be removed from your view.')) return;

    var form = document.getElementById('deleteConversationForm');
    form.action = '{{ route("account.messages.destroy", ":id") }}'.replace(':id', conversationId);
    form.submit();
}
</script>
@endpush