{% extends 'base.html' %}
{% block title %}Chat — {{ project.name }}{% endblock %}

{% block head %}
<style>
  .chat-layout {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 57px);
  }
  .chat-topbar {
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    flex-shrink: 0;
  }
  .chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .msg {
    display: flex;
    gap: 12px;
    max-width: 780px;
  }
  .msg.user {
    align-self: flex-end;
    flex-direction: row-reverse;
  }
  .msg-avatar {
    width: 30px; height: 30px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 600;
    flex-shrink: 0;
  }
  .msg.user .msg-avatar { background: var(--accent-dim); color: var(--accent); }
  .msg.assistant .msg-avatar { background: var(--surface2); color: var(--text-muted); border: 1px solid var(--border); }
  .msg-body {}
  .msg-content {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 13.5px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
  }
  .msg.user .msg-content {
    background: var(--accent);
    color: #fff;
    border-bottom-right-radius: 4px;
  }
  .msg.assistant .msg-content {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
  }
  .msg-time {
    font-size: 11px;
    color: var(--text-dim);
    margin-top: 5px;
    padding: 0 4px;
  }
  .msg.user .msg-time { text-align: right; }

  .chat-input-area {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
  }
  .chat-input-wrap {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    max-width: 780px;
    margin: 0 auto;
  }
  #chat-input {
    flex: 1;
    resize: none;
    min-height: 44px;
    max-height: 160px;
    padding: 10px 14px;
    line-height: 1.5;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--font);
    font-size: 13.5px;
    outline: none;
    transition: border-color 0.15s;
  }
  #chat-input:focus { border-color: var(--accent); }
  #send-btn {
    padding: 10px 18px;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s;
    white-space: nowrap;
  }
  #send-btn:hover { opacity: 0.9; }
  #send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

  .typing-indicator {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    border-bottom-left-radius: 4px;
    width: fit-content;
  }
  .typing-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typing 1.2s infinite ease-in-out;
  }
  .typing-dot:nth-child(2) { animation-delay: 0.2s; }
  .typing-dot:nth-child(3) { animation-delay: 0.4s; }
  @keyframes typing {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
  }

  .context-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 11px;
    color: var(--text-muted);
  }
  .context-pill span { color: var(--accent); font-weight: 500; }
</style>
{% endblock %}

{% block content %}
<div class="chat-layout">
  <div class="chat-topbar">
    <a href="{{ url_for('projects.detail', project_id=project.id) }}" class="btn btn-ghost btn-sm">← Projeto</a>
    <div style="flex:1;">
      <div style="font-size:14px; font-weight:600;">Chat IA — {{ project.name }}</div>
      <div style="font-size:11px; color:var(--text-muted); margin-top:1px;">{{ project.client.name }} · IA contextualizada neste projeto</div>
    </div>
    <div class="context-pill">
      <svg width="10" height="10" viewBox="0 0 24 24" fill="currentColor"><circle cx="12" cy="12" r="6"/></svg>
      Contexto: <span>{{ project.name }}</span>
    </div>
    {% if current_user.is_admin() %}
    <button onclick="clearChat()" class="btn btn-ghost btn-sm" style="color:var(--text-dim);" title="Limpar histórico">
      <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="3 6 5 6 21 6"/><path d="M19 6l-1 14H6L5 6"/><path d="M10 11v6"/><path d="M14 11v6"/><path d="M9 6V4h6v2"/></svg>
    </button>
    {% endif %}
  </div>

  <div class="chat-messages" id="chat-messages">
    {% if not messages %}
    <div style="text-align:center; padding:40px 24px; color:var(--text-muted);">
      <div style="font-size:32px; margin-bottom:12px; opacity:.3;">💬</div>
      <div style="font-size:14px; font-weight:500; margin-bottom:6px;">Chat iniciado</div>
      <div style="font-size:13px; opacity:.7;">A IA responde com base no contexto do projeto <strong>{{ project.name }}</strong>.<br>Faça uma pergunta ou peça ajuda sobre este projeto.</div>
    </div>
    {% else %}
      {% for msg in messages %}
      <div class="msg {{ msg.role }}" data-id="{{ msg.id }}">
        <div class="msg-avatar">
          {% if msg.role == 'user' %}{{ current_user.name[0].upper() }}{% else %}IA{% endif %}
        </div>
        <div class="msg-body">
          <div class="msg-content">{{ msg.content }}</div>
          <div class="msg-time">{{ msg.created_at.strftime('%d/%m %H:%M') }}</div>
        </div>
      </div>
      {% endfor %}
    {% endif %}

    <div class="msg assistant" id="typing-msg" style="display:none;">
      <div class="msg-avatar">IA</div>
      <div class="typing-indicator" style="display:flex;">
        <div class="typing-dot"></div>
        <div class="typing-dot"></div>
        <div class="typing-dot"></div>
      </div>
    </div>
  </div>

  <div class="chat-input-area">
    <div class="chat-input-wrap">
      <textarea id="chat-input" placeholder="Pergunte sobre este projeto..." rows="1"></textarea>
      <button id="send-btn" onclick="sendMessage()">Enviar</button>
    </div>
    <div style="text-align:center; margin-top:8px; font-size:11px; color:var(--text-dim);">
      Enter para enviar · Shift+Enter para nova linha
    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
const projectId = {{ project.id }};
const chatMessages = document.getElementById('chat-messages');
const input = document.getElementById('chat-input');
const sendBtn = document.getElementById('send-btn');
const typingMsg = document.getElementById('typing-msg');

function scrollToBottom() {
  chatMessages.scrollTop = chatMessages.scrollHeight;
}
scrollToBottom();

input.addEventListener('keydown', (e) => {
  if (e.key === 'Enter' && !e.shiftKey) {
    e.preventDefault();
    sendMessage();
  }
});

input.addEventListener('input', () => {
  input.style.height = 'auto';
  input.style.height = Math.min(input.scrollHeight, 160) + 'px';
});

function appendMessage(role, content, time) {
  const userName = '{{ current_user.name[0].upper() }}';
  const avatar = role === 'user' ? userName : 'IA';
  const div = document.createElement('div');
  div.className = `msg ${role}`;
  div.innerHTML = `
    <div class="msg-avatar">${avatar}</div>
    <div class="msg-body">
      <div class="msg-content">${escapeHtml(content)}</div>
      <div class="msg-time">${time}</div>
    </div>
  `;
  chatMessages.insertBefore(div, typingMsg);
  scrollToBottom();
}

function escapeHtml(text) {
  return text
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/\n/g, '<br>');
}

async function sendMessage() {
  const msg = input.value.trim();
  if (!msg) return;

  sendBtn.disabled = true;
  input.value = '';
  input.style.height = 'auto';

  const now = new Date();
  const timeStr = `${now.getDate().toString().padStart(2,'0')}/${(now.getMonth()+1).toString().padStart(2,'0')} ${now.getHours().toString().padStart(2,'0')}:${now.getMinutes().toString().padStart(2,'0')}`;
  appendMessage('user', msg, timeStr);

  typingMsg.style.display = 'flex';
  scrollToBottom();

  try {
    const res = await fetch(`/projects/${projectId}/chat/send`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ message: msg }),
    });
    const data = await res.json();
    typingMsg.style.display = 'none';

    if (data.reply) {
      appendMessage('assistant', data.reply, data.timestamp);
    } else {
      appendMessage('assistant', '⚠️ Erro ao obter resposta.', timeStr);
    }
  } catch (err) {
    typingMsg.style.display = 'none';
    appendMessage('assistant', '⚠️ Erro de conexão.', timeStr);
  }

  sendBtn.disabled = false;
  input.focus();
}

async function clearChat() {
  if (!confirm('Limpar todo o histórico deste chat?')) return;
  await fetch(`/projects/${projectId}/chat/clear`, { method: 'POST' });
  location.reload();
}
</script>
{% endblock %}