import { useNavigate } from "react-router-dom";

import { ModelType, Theme, useAppConfig } from "@/app/store/config";
import { useChatStore } from "@/app/store/chat";
import { ChatControllerPool } from "@/app/client/controller";
import { useAllModels } from "@/app/utils/hooks";
import { useEffect, useMemo, useState } from "react";
import { isVisionModel } from "@/app/utils";
import { Selector, showToast } from "@/app/components/ui-lib";
import Locale from "@/app/locales";
import { Path } from "@/app/constant";

import LightIcon from "@/app/icons/light.svg";
import DarkIcon from "@/app/icons/dark.svg";
import AutoIcon from "@/app/icons/auto.svg";
import BottomIcon from "@/app/icons/bottom.svg";
import StopIcon from "@/app/icons/pause.svg";
import RobotIcon from "@/app/icons/robot.svg";
import LoadingButtonIcon from "@/app/icons/loading.svg";
import PromptIcon from "@/app/icons/prompt.svg";
import MaskIcon from "@/app/icons/mask.svg";
import BreakIcon from "@/app/icons/break.svg";
import SettingsIcon from "@/app/icons/chat-settings.svg";
import ImageIcon from "@/app/icons/image.svg";

import ChatAction from "./ChatAction";

import styles from "./index.module.scss";

export function ChatActions(props: {
  uploadImage: () => void;
  setAttachImages: (images: string[]) => void;
  setUploading: (uploading: boolean) => void;
  showPromptModal: () => void;
  scrollToBottom: () => void;
  showPromptHints: () => void;
  hitBottom: boolean;
  uploading: boolean;
}) {
  const config = useAppConfig();
  const navigate = useNavigate();
  const chatStore = useChatStore();

  // switch themes
  const theme = config.theme;
  function nextTheme() {
    const themes = [Theme.Auto, Theme.Light, Theme.Dark];
    const themeIndex = themes.indexOf(theme);
    const nextIndex = (themeIndex + 1) % themes.length;
    const nextTheme = themes[nextIndex];
    config.update((config) => (config.theme = nextTheme));
  }

  // stop all responses
  const couldStop = ChatControllerPool.hasPending();
  const stopAll = () => ChatControllerPool.stopAll();

  // switch model
  const currentModel = chatStore.currentSession().mask.modelConfig.model;
  const allModels = useAllModels();
  const models = useMemo(
    () => allModels.filter((m) => m.available),
    [allModels],
  );
  const [showModelSelector, setShowModelSelector] = useState(false);
  const [showUploadImage, setShowUploadImage] = useState(false);

  useEffect(() => {
    const show = isVisionModel(currentModel);
    setShowUploadImage(show);
    if (!show) {
      props.setAttachImages([]);
      props.setUploading(false);
    }

    // if current model is not available
    // switch to first available model
    const isUnavaliableModel = !models.some((m) => m.name === currentModel);
    if (isUnavaliableModel && models.length > 0) {
      const nextModel = models[0].name as ModelType;
      chatStore.updateCurrentSession(
        (session) => (session.mask.modelConfig.model = nextModel),
      );
      showToast(nextModel);
    }
  }, [chatStore, currentModel, models]);

  return (
    <div className={styles["chat-input-actions"]}>
      {couldStop && (
        <ChatAction
          onClick={stopAll}
          text={Locale.Chat.InputActions.Stop}
          icon={<StopIcon />}
        />
      )}
      {!props.hitBottom && (
        <ChatAction
          onClick={props.scrollToBottom}
          text={Locale.Chat.InputActions.ToBottom}
          icon={<BottomIcon />}
        />
      )}
      {props.hitBottom && (
        <ChatAction
          onClick={props.showPromptModal}
          text={Locale.Chat.InputActions.Settings}
          icon={<SettingsIcon />}
        />
      )}

      {showUploadImage && (
        <ChatAction
          onClick={props.uploadImage}
          text={Locale.Chat.InputActions.UploadImage}
          icon={props.uploading ? <LoadingButtonIcon /> : <ImageIcon />}
        />
      )}
      <ChatAction
        onClick={nextTheme}
        text={Locale.Chat.InputActions.Theme[theme]}
        icon={
          <>
            {theme === Theme.Auto ? (
              <AutoIcon />
            ) : theme === Theme.Light ? (
              <LightIcon />
            ) : theme === Theme.Dark ? (
              <DarkIcon />
            ) : null}
          </>
        }
      />

      <ChatAction
        onClick={props.showPromptHints}
        text={Locale.Chat.InputActions.Prompt}
        icon={<PromptIcon />}
      />

      <ChatAction
        onClick={() => {
          navigate(Path.Masks);
        }}
        text={Locale.Chat.InputActions.Masks}
        icon={<MaskIcon />}
      />

      <ChatAction
        text={Locale.Chat.InputActions.Clear}
        icon={<BreakIcon />}
        onClick={() => {
          chatStore.updateCurrentSession((session) => {
            if (session.clearContextIndex === session.messages.length) {
              session.clearContextIndex = undefined;
            } else {
              session.clearContextIndex = session.messages.length;
              session.memoryPrompt = ""; // will clear memory
            }
          });
        }}
      />

      <ChatAction
        onClick={() => setShowModelSelector(true)}
        text={currentModel}
        icon={<RobotIcon />}
      />

      {showModelSelector && (
        <Selector
          defaultSelectedValue={currentModel}
          items={models.map((m) => ({
            title: m.displayName,
            value: m.name,
          }))}
          onClose={() => setShowModelSelector(false)}
          onSelection={(s) => {
            if (s.length === 0) return;
            chatStore.updateCurrentSession((session) => {
              session.mask.modelConfig.model = s[0] as ModelType;
              session.mask.syncGlobalConfig = false;
            });
            showToast(s[0]);
          }}
        />
      )}
    </div>
  );
}