import Image from "next/image";
import useCreateConversation from "@/_hooks/useCreateConversation";
import PrimaryButton from "../PrimaryButton";
import { useAtomValue, useSetAtom } from "jotai";
import { useEffect, useState } from "react";
import {
  MainViewState,
  setMainViewStateAtom,
} from "@/_helpers/atoms/MainView.atom";
import { activeAssistantModelAtom } from "@/_helpers/atoms/Model.atom";
import useInitModel from "@/_hooks/useInitModel";
import { useGetDownloadedModels } from "@/_hooks/useGetDownloadedModels";
import { AssistantModel } from "@/_models/AssistantModel";

enum ActionButton {
  DownloadModel = "Download a Model",
  StartChat = "Start a Conversation",
}

const SidebarEmptyHistory: React.FC = () => {
  const { downloadedModels } = useGetDownloadedModels();
  const activeModel = useAtomValue(activeAssistantModelAtom);
  const setMainView = useSetAtom(setMainViewStateAtom);
  const { requestCreateConvo } = useCreateConversation();
  const [action, setAction] = useState(ActionButton.DownloadModel);

  const { initModel } = useInitModel();

  useEffect(() => {
    if (downloadedModels.length > 0) {
      setAction(ActionButton.StartChat);
    } else {
      setAction(ActionButton.DownloadModel);
    }
  }, [downloadedModels]);

  const onClick = () => {
    if (action === ActionButton.DownloadModel) {
      setMainView(MainViewState.ExploreModel);
    } else {
      if (!activeModel) {
        setMainView(MainViewState.ConversationEmptyModel);
      } else {
        createConversationAndInitModel(activeModel);
      }
    }
  };

  const createConversationAndInitModel = async (model: AssistantModel) => {
    await requestCreateConvo(model);
    await initModel(model);
  };

  return (
    <div className="flex flex-col items-center py-10 gap-3">
      <Image
        src={"icons/chat-bubble-oval-left.svg"}
        width={32}
        height={32}
        alt=""
      />
      <div className="flex flex-col items-center gap-6">
        <div className="text-center text-gray-900 text-sm">No Chat History</div>
        <div className="text-center text-gray-500 text-sm">
          Get started by creating a new chat.
        </div>
        <PrimaryButton title={action} onClick={onClick} />
      </div>
    </div>
  );
};

export default SidebarEmptyHistory;