// Ai模型接口
const API_KEY = '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';
const API_URL = 'https://openrouter.ai/api/v1/chat/completions';
let messages = [];

function appendMessage(content, sender) {
  const chatContainer = document.getElementById('chatContainer');
  const messageDiv = document.createElement('div');
  messageDiv.classList.add('message', sender);
  messageDiv.textContent = content;
  chatContainer.appendChild(messageDiv);
  chatContainer.scrollTop = chatContainer.scrollHeight;
}

async function sendMessage() {
  const inputElem = document.getElementById('userInput');
  const userMessage = inputElem.value.trim();
  if (!userMessage) return;

  appendMessage(userMessage, 'user');
  messages.push({ role: 'user', content: userMessage });
  inputElem.value = '';

  const payload = {
    model: 'deepseek/deepseek-r1:free',
    messages: messages
  };

  try {
    const response = await fetch(API_URL, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer ' + API_KEY
      },
      body: JSON.stringify(payload)
    });
    const data = await response.json();

    if (data.choices && data.choices.length > 0) {
      const botMessage = data.choices[0].message.content;
      appendMessage(botMessage, 'bot');
      messages.push({ role: 'assistant', content: botMessage });
    } else {
      appendMessage('没有收到有效响应，请检查 API 设置。', 'bot');
    }
  } catch (error) {
    console.error('请求错误：', error);
    appendMessage('请求出错：' + error.message, 'bot');
  }
}