@extends('layouts.app')

@section('header', 'Chat com IA')

@section('breadcrumbs')
    @php
        $breadcrumbs = [
            'Chat com IA' => null
        ];
    @endphp
@endsection

@section('content')
    <div class="row">
        <div class="col-lg-12">
            <div class="card shadow mb-4">
                <div class="card-header py-3 d-flex justify-content-between align-items-center">
                    <h6 class="m-0 fw-bold text-primary">Conversa</h6>
                    <div>
                        <form method="POST" action="{{ route('chat.reset') }}" class="d-inline" onsubmit="return confirm('Tem certeza que deseja reiniciar a conversa?')">
                            @csrf
                            <button type="submit" class="btn btn-sm btn-outline-secondary me-2">
                                <i class="bi bi-arrow-clockwise me-1"></i> Reiniciar
                            </button>
                        </form>
                    </div>
                </div>
                <div class="card-body">
                    <div id="chat-messages" class="border rounded p-3 mb-3 bg-light" style="min-height: 400px; max-height: 600px; overflow-y: auto;">
                        @forelse($history as $msg)
                            <div class="mb-3 {{ $msg['role'] === 'user' ? 'text-end' : 'text-start' }}">
                                <div class="d-inline-block p-2 rounded {{ $msg['role'] === 'user' ? 'bg-primary text-white' : 'bg-white border' }}" style="max-width: 80%; white-space: pre-wrap;">
                                    {{ $msg['content'] }}
                                </div>
                            </div>
                        @empty
                            <p class="text-muted text-center">Nenhuma mensagem ainda. Inicie a conversa!</p>
                        @endforelse
                    </div>

                    <form id="chat-form" class="mt-3">
                        @csrf
                        <div class="row mb-3">
                            <div class="col-md-6 mb-2">
                                <label for="provider_id" class="form-label">Provider</label>
                                <select class="form-select" id="provider_id" name="provider_id" required>
                                    <option value="">-- Selecione --</option>
                                    @foreach($providers as $provider)
                                        <option value="{{ $provider->id }}" {{ old('provider_id', $defaultProviderId) == $provider->id ? 'selected' : '' }}>
                                            {{ $provider->name }}
                                        </option>
                                    @endforeach
                                </select>
                            </div>
                            <div class="col-md-6 mb-2">
                                <label for="model_id" class="form-label">Modelo</label>
                                <select class="form-select" id="model_id" name="model_id" required disabled>
                                    <option value="">-- Selecione um provider primeiro --</option>
                                </select>
                            </div>
                        </div>
                        <div class="row mb-3">
                            <div class="col-md-4 mb-2">
                                <label for="temperature" class="form-label">Temperatura</label>
                                <input type="number" class="form-control" id="temperature" name="temperature" value="{{ old('temperature', 0.7) }}" step="0.1" min="0" max="1">
                            </div>
                            <div class="col-md-4 mb-2">
                                <label for="max_tokens" class="form-label">Max Tokens</label>
                                <input type="number" class="form-control" id="max_tokens" name="max_tokens" value="{{ old('max_tokens', 8192) }}" min="1" max="128000">
                            </div>
                        </div>
                        <div class="input-group">
                            <textarea class="form-control" id="message" name="message" rows="1" placeholder="Digite sua mensagem..." required></textarea>
                            <button class="btn btn-primary" type="submit" id="send-btn">
                                <i class="bi bi-send"></i> Enviar
                            </button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
@endsection

@section('scripts')
    <script>
        const providerSelect = document.getElementById('provider_id');
        const modelSelect = document.getElementById('model_id');
        const chatForm = document.getElementById('chat-form');
        const chatMessages = document.getElementById('chat-messages');
        const sendBtn = document.getElementById('send-btn');
        const messageInput = document.getElementById('message');

        providerSelect.addEventListener('change', function() {
            const providerId = this.value;

            if (!providerId) {
                modelSelect.innerHTML = '<option value="">-- Selecione um provider primeiro --</option>';
                modelSelect.disabled = true;
                return;
            }

            fetch(`{{ route('chat.models') }}?provider_id=${providerId}`)
                .then(response => response.json())
                .then(models => {
                    modelSelect.innerHTML = '<option value="">-- Selecione um modelo --</option>';
                    models.forEach(model => {
                        const option = document.createElement('option');
                        option.value = model.id;
                        option.textContent = model.name;
                        modelSelect.appendChild(option);
                    });
                    modelSelect.disabled = false;
                });
        });

        chatForm.addEventListener('submit', function(e) {
            e.preventDefault();

            const message = messageInput.value.trim();
            if (!message) return;

            appendMessage('user', message);
            messageInput.value = '';
            sendBtn.disabled = true;

            const formData = new FormData();
            formData.append('_token', '{{ csrf_token() }}');
            formData.append('message', message);
            formData.append('provider_id', providerSelect.value);
            formData.append('model_id', modelSelect.value);
            formData.append('temperature', document.getElementById('temperature').value);
            formData.append('max_tokens', document.getElementById('max_tokens').value);

            fetch('{{ route('chat.send') }}', {
                method: 'POST',
                body: formData,
            })
            .then(response => response.json())
            .then(data => {
                if (data.success) {
                    appendMessage('assistant', data.content);
                } else {
                    appendMessage('assistant', 'Erro: ' + data.error);
                }
                sendBtn.disabled = false;
            })
            .catch(() => {
                appendMessage('assistant', 'Erro ao enviar mensagem.');
                sendBtn.disabled = false;
            });
        });

        function appendMessage(role, content) {
            const div = document.createElement('div');
            div.className = 'mb-3 ' + (role === 'user' ? 'text-end' : 'text-start');
            div.innerHTML = '<div class="d-inline-block p-2 rounded ' + (role === 'user' ? 'bg-primary text-white' : 'bg-white border') + '" style="max-width: 80%; white-space: pre-wrap;">' + escapeHtml(content) + '</div>';
            chatMessages.appendChild(div);
            chatMessages.scrollTop = chatMessages.scrollHeight;
        }

        function escapeHtml(text) {
            const map = { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#039;' };
            return text.replace(/[&<>"']/g, m => map[m]);
        }

        @if(!empty($history) && old('provider_id'))
            window.addEventListener('DOMContentLoaded', function() {
                providerSelect.value = {{ old('provider_id', 1) }};
                providerSelect.dispatchEvent(new Event('change'));
                setTimeout(() => {
                    modelSelect.value = {{ old('model_id') }};
                }, 500);
            });
        @else
            window.addEventListener('DOMContentLoaded', function() {
                if (providerSelect.value) {
                    providerSelect.dispatchEvent(new Event('change'));
                    setTimeout(() => {
                        modelSelect.value = {{ $defaultModelId }};
                    }, 500);
                }
            });
        @endif
    </script>
@endsection