import { api } from './request';

export interface AiChatMessage {
  id: string;
  role: 'user' | 'assistant';
  content: string;
  created_at: string;
}

export interface AiChatResponse {
  reply: string;
  message_id: string;
}

/** 发送消息给 AI 客服 */
export async function sendAiMessage(
  message: string,
  history?: AiChatMessage[],
  patientId?: string,
): Promise<AiChatResponse> {
  const body: Record<string, unknown> = {
    message,
    history: history?.slice(-10),
  };
  if (patientId) {
    body.patient_id = patientId;
  }
  const resp = await api.post<AiChatResponse>('/ai/chat', body);
  return resp;
}

/** 获取聊天历史（本地缓存） */
export function getLocalHistory(): AiChatMessage[] {
  try {
    const raw = wx.getStorageSync('ai_chat_history');
    return raw ? JSON.parse(raw) : [];
  } catch {
    return [];
  }
}

/** 保存聊天历史到本地 */
export function saveLocalHistory(messages: AiChatMessage[]): void {
  try {
    wx.setStorageSync('ai_chat_history', JSON.stringify(messages.slice(-100)));
  } catch { /* ignore */ }
}