/**
 * 文本|语音聊天框
 */

import { create } from "zustand";
import { generateUUID } from '@/utils/index'

import { getMessageHistories, type TGetMessageHistoriesParams,  } from '@/service/bot'
import { EChatRole, TAnyMessage, TRobotMessage, TMessage } from "@/types/bot";



type TRobotMessageWithOptionalId = Omit<TRobotMessage, "msgUk"> & {
  msgUk?: string; // 将 messageId 设置为可选
  reasoningContent?: string; // 添加 reasoningContent
};


const INIT_CURRENT_ROBOT_MSG_UK = ''

export interface TextChat {
  currentRobotMsgUk: string; // 当前正在说话的 AI 机器人 id, 可用于控制是否继续输出文本至当前 message 框内
  scrollTop: number; // 控制聊天内容变化后滚动至最底部
  autoScroll: boolean
  list: TAnyMessage[];
  questions: string[]; //推荐问题
  sessionId: string|null
  // 显示聊天历史
  setAutoScroll: (b: boolean) => void // 是否自动滚动
  genSessionId: () => void // 进入聊天界面后，本次的 sessionId
  setQuestions: (q:string[]) => void // 设置推荐问题
  setScrollTop: () => void
  // 将机器人气泡框推入聊天框
  pushRobotMessage: (message: TRobotMessageWithOptionalId) => string;
  // 将自己发出的气泡框推入聊天框
  pushMessage: (content: string) => {msgUk: string, sessionId: string};
  // 更新自己发出的气泡框
  updateMessage: (content: string, msgUk: string) => string;
  // 更新机器人汽泡框内的内容实现 gpt 的效果
  updateRobotMessage: (content: string, body?: Record<string,any>, saveStatus?: number) => void;
  updateRobotReasoningMessage: (msgUk: string, reasoningContent: string, body?:Record<string,any>) => void;
  getCurrentRobotMessage:() => TRobotMessage|undefined
  deleteMessage: (msgUk: string) => void;
  // 清空
  destroy: () => void;
  fetchMessageHistories: (data: TGetMessageHistoriesParams) => void
}

// 新messageId 为 index 加 1
const generateUk = () => {
  return generateUUID();
}

export const useTextChat = create<TextChat>((set, get) => ({
  currentRobotMsgUk: INIT_CURRENT_ROBOT_MSG_UK,
  scrollTop: 999999,
  autoScroll: true,
  list: [],
  sessionId: null,
  questions: [],
  setAutoScroll: (b)=> {
    set({autoScroll: b})
  },
  setQuestions: (q:string[])=> {
    set({questions: q})
  },
  genSessionId: ()=> {
    const sessionId = generateUUID();
    set({
      sessionId
    })
  },
  // 重置
  destroy: () => {
    set({
      list: [],
      questions: [],
      currentRobotMsgUk: INIT_CURRENT_ROBOT_MSG_UK,
      scrollTop: 9999,
      sessionId: null,
    });
  },
  pushRobotMessage: (message) => {
    const msgUk = generateUk()
    set((state) => {
      const newRobotMessage = { ...message, msgUk, role: EChatRole.Assistant } as TRobotMessage
      return {
        list: [...state.list, newRobotMessage],
        currentRobotMsgUk: msgUk,
        scrollTop: state.scrollTop + 1,
      };
    });
    setTimeout(()=> {
      set((state) => {
        return {
          scrollTop: state.scrollTop + 1,
        };
      });
    }, 100)
    return msgUk
  },
  setScrollTop: ()=> {
    set((state) => {
      return {
        scrollTop: state.scrollTop + 1,
      };
    });
  },
  pushMessage: (content: string) => {
    const msgUk = generateUk();
    const newMessage:TMessage ={ msgUk, content: content, role: EChatRole.User, saveStatus: 0 }
    set((state) => {
      return {
        list: [...state.list,  newMessage],
        scrollTop: state.scrollTop + 1,
      };
    });
    setTimeout(()=> {
      set((state) => {
        return {
          scrollTop: state.scrollTop + 1,
        };
      });
    }, 100)
    
    return {msgUk, sessionId: get().sessionId ?? ''}
  },
  updateMessage: (content, msgUk) => {
    set((state) => {
      const updatedList = state.list.map((message) => {
        if (message.msgUk === msgUk) {
          return { ...message, content: message.content + content, saveStatus: 0  }; // 更新 content
        }
        return message; // 返回未修改的 message
      });
      return { list: updatedList, scrollTop: state.scrollTop + 1 }; // 返回新的状态
    });
    return msgUk
  },
  updateRobotMessage: (content, body={}, saveStatus: number = 0) => {
    set((state) => {
      const updatedList = state.list.map((message) => {
        if (message.msgUk === state.currentRobotMsgUk) {
          // 更新消息后， saveStatus 变为 0，说明又需要上报此消息
          return { ...message, content: message.content + content, body, saveStatus: saveStatus } as TRobotMessage  // 更新 content
        }
        return message; // 返回未修改的 message
      });
      
      return { list: updatedList, scrollTop:  state.autoScroll ?   state.scrollTop + 1 : state.scrollTop}; // 返回新的状态
    });
  },
  getCurrentRobotMessage: ()=> {
    const state = get()
    const currentMessage = state.list.find((message)=>  message.msgUk === state.currentRobotMsgUk) as TRobotMessage
    return currentMessage
  },
  updateRobotReasoningMessage: (msgUk, reasoningContent, body={}) => {
    set((state) => {
      // 由于 currentRobotMsgUk 可能发生变化, 所以需要传递 msgUk
      // console.log(state.currentRobotMsgUk, msgUk)
      const updatedList = state.list.map((message) => {
        if (message.msgUk === msgUk) {
          //@ts-ignore
          return { ...message, body, reasoningContent: message.reasoningContent + reasoningContent } as TRobotMessage // 更新 reasoningContent
        }
        return message; // 返回未修改的 message
      });
      return { list: updatedList, scrollTop: state.autoScroll ?   state.scrollTop + 1 : state.scrollTop}; // 返回新的状态
    });
  },
  deleteMessage: (msgUk)=> {
    set((state) => {
      // 如果对话框是空的，则删除
      const filtered = state.list.filter((message) => {
        const isEmptyContent = message.content.length <= 0
        return (message.msgUk !== msgUk && isEmptyContent)
      });
      return { list: filtered, scrollTop: state.scrollTop + 1 }; // 返回新的状态
    });
  },
  // 停止当前机器人说话输出框输出
  stopCurrentRobotMessaging: ()=> {
    set({currentRobotMsgUk: INIT_CURRENT_ROBOT_MSG_UK})
  },
  fetchMessageHistories: async (data: TGetMessageHistoriesParams) => {
    const response = await getMessageHistories(data)
    console.log(response)
    if(response.status){
      
    }
  }
}));