import useRequestToken from '@/hooks/use-request-token';
import {
  ClearOutlined,
  PlusOutlined,
  QuestionCircleOutlined,
  SendOutlined
} from '@ant-design/icons';
import {
  AlertInfo,
  InputNumber as CInputNumber,
  HighlightCode,
  IconFont,
  ResizePanel,
  ScatterChart,
  useOverlayScroller
} from '@gpustack/core-ui';
import { useIntl } from '@umijs/max';
import { useMemoizedFn } from 'ahooks';
import { Button, Checkbox, Form, Segmented, Spin, Tabs, Tooltip } from 'antd';
import _ from 'lodash';
import 'overlayscrollbars/overlayscrollbars.css';
import React, {
  forwardRef,
  useCallback,
  useEffect,
  useImperativeHandle,
  useMemo,
  useRef,
  useState
} from 'react';
import { EMBEDDING_API, handleEmbedding } from '../apis';
import InputList from '../components/input-list';
import RightContainer from '../components/right-container';
import TokenUsage from '../components/token-usage';
import ViewCommonCode from '../components/view-common-code';
import { extractErrorMessage, generateMessagesByListContent } from '../config';
import { embeddingSamples } from '../config/samples';
import { LLM_METAKEYS } from '../hooks/config';
import useEmbeddingWorker from '../hooks/use-embedding-worker';
import { useInitLLmMeta } from '../hooks/use-init-llm';
import '../style/ground-llm.less';
import '../style/rerank.less';
import { generateEmbeddingCode } from '../view-code/embedding';
import DataForm from './forms';

interface MessageProps {
  modelList: Global.BaseOption<string>[];
  loaded?: boolean;
  ref?: any;
}

const GroundEmbedding: React.FC<MessageProps> = forwardRef((props, ref) => {
  const { modelList } = props;

  const intl = useIntl();
  const { workerRef, createWorker, postMessage, terminateWorker } =
    useEmbeddingWorker();
  const requestSource = useRequestToken();
  const [show, setShow] = useState(false);
  const [loading, setLoading] = useState(false);
  const [tokenResult, setTokenResult] = useState<any>(null);
  const [collapse, setCollapse] = useState(false);
  const contentRef = useRef<any>('');
  const scroller = useRef<any>(null);
  const inputListRef = useRef<any>(null);
  const messageListLengthCache = useRef<number>(0);
  const requestToken = useRef<any>(null);
  const [outputType, setOutputType] = useState<string>('chart');
  const [outputHeight, setOutputHeight] = useState<number>(180);
  const [embeddingData, setEmbeddingData] = useState<{
    code: string;
    copyValue: string;
  }>({
    code: '',
    copyValue: ''
  });
  const [lessTwoInput, setLessTwoInput] = useState<boolean>(false);
  const multiplePasteEnable = useRef<boolean>(true);
  const selectionTextRef = useRef<any>(null);

  const [textList, setTextList] = useState<
    {
      content: string;
      imgs?: { uid: number | string; dataUrl: string }[];
      uid: number | string;
      name: string;
      role: string;
    }[]
  >([
    {
      content: '',
      uid: -1,
      name: '',
      role: 'user'
    },
    {
      content: '',
      uid: -2,
      name: '',
      role: 'user'
    }
  ]);

  const [scatterData, setScatterData] = useState<any[]>([]);
  const resizeRef = useRef<any>(null);
  const resizeMaxHeight = 400;

  const { initialize, updateScrollerPosition: updateDocumentScrollerPosition } =
    useOverlayScroller();

  const { handleOnValuesChange, formRef, parameters, modelMeta } =
    useInitLLmMeta(
      {
        modelList,
        isChat: true
      },
      {
        defaultValues: {},
        defaultParamsConfig: [],
        metaKeys: LLM_METAKEYS
      }
    );

  useImperativeHandle(ref, () => {
    return {
      viewCode() {
        setShow(true);
      },
      setCollapse() {
        setCollapse(!collapse);
      },
      calculateNewMaxFromBoundary: (maxWidth?: number, maxHeight?: number) => {
        resizeRef.current?.container?.calculateNewMaxFromBoundary();
      },
      collapse: collapse
    };
  });

  const formatInputs = (
    list: {
      content: string;
      imgs?: { uid: number | string; dataUrl: string }[];
      uid: number | string;
      name: string;
      role: string;
    }[]
  ) => {
    const validTextList = textList.filter(
      (item) => item.content || item.imgs?.length
    );

    const hasImages = validTextList.some((item) => item.imgs?.length);

    const mutipleInput = generateMessagesByListContent(validTextList, true);

    // const firstInput = mutipleInput?.[0];
    // mutipleInput.forEach((item: any) => {
    //   firstInput.content = firstInput.content.concat(item.content);
    // });

    return hasImages
      ? { messages: mutipleInput }
      : { input: [...validTextList.map((item) => item.content || '')] };
  };

  const viewCodeContent = useMemo(() => {
    return generateEmbeddingCode({
      api: EMBEDDING_API,
      parameters: {
        ...parameters,
        ...formatInputs(textList)
      }
    });
  }, [parameters, textList]);

  const inputEmpty = useMemo(() => {
    const list = [...textList];
    return list.length < 2;
  }, [textList]);

  const setMessageId = () => {
    return inputListRef.current?.setMessageId?.();
  };

  const handleStopConversation = () => {
    requestToken.current?.cancel?.();
    setLoading(false);
  };

  const submitMessage = async (current?: { role: string; content: string }) => {
    try {
      await formRef.current?.form.validateFields();
      if (!parameters.model) return;
      const validTextList = textList.filter(
        (item) => item.content || item.imgs?.length
      );

      const inputList = formatInputs(textList);

      if (validTextList.length < 2) {
        setLessTwoInput(true);

        return;
      }

      setTextList(validTextList);

      setLessTwoInput(false);
      setLoading(true);
      setMessageId();
      setTokenResult(null);

      requestToken.current?.cancel?.();
      requestToken.current = requestSource();

      contentRef.current = current?.content || '';

      const result: any = await handleEmbedding(
        {
          model: parameters.model,
          encoding_format: 'float',
          ...inputList
        },
        {
          token: requestToken.current.token
        }
      );

      setTokenResult(result.usage);

      const embeddingsList = result.data || [];

      createWorker();

      workerRef.current!.onmessage = (event: MessageEvent) => {
        const { scatterData, embeddingData } = event.data;

        setScatterData(scatterData);
        setEmbeddingData(embeddingData);
        setLoading(false);
      };

      postMessage({
        embeddings: embeddingsList,
        textList: textList
      });
    } catch (error: any) {
      setTokenResult({
        error: true,
        errorMessage: extractErrorMessage(error.response)
      });
      setLoading(false);
    }
  };

  const handleSendMessage = () => {
    submitMessage();
  };

  const handleCloseViewCode = () => {
    setShow(false);
  };

  const handleScaleOutputSize = (
    e: any,
    direction: string,
    ref: any,
    d: any
  ) => {
    console.log('handleScaleOutputSize', e, direction, ref, d);
    if (
      d.height + outputHeight <= resizeMaxHeight &&
      d.height + outputHeight >= 180
    ) {
      setOutputHeight(d.height + outputHeight);
    }
  };

  const handleScaleResize = () => {
    const height = resizeRef.current?.container?.state?.height;
    if (height) {
      setOutputHeight(height);
    }
  };

  const handleAddText = () => {
    inputListRef.current?.handleAdd();
  };

  const handleTextListChange = (
    list: {
      content: string;
      imgs?: { uid: number | string; dataUrl: string }[];
      uid: number | string;
      name: string;
      role: string;
    }[]
  ) => {
    setTextList(list);
  };

  const handleOnUploadImage = (
    list: { uid: number | string; dataUrl: string }[],
    index: number
  ) => {
    setTextList((preList) => {
      const newList = [...preList];
      const current = newList[index];
      if (current) {
        newList[index] = {
          ...current,
          content: '',
          imgs: list.map((item) => {
            return {
              ...item,
              width: 32,
              height: 32
            };
          })
        };
      }
      return newList;
    });
  };

  const handleOnDeleteImage = (
    itemUid: number | string,
    updatedImgs: { uid: number | string; dataUrl: string }[]
  ) => {
    setTextList((preList) => {
      const newList = [...preList];
      const current = newList.find((i) => i.uid === itemUid);
      if (current) {
        current.imgs = updatedImgs;
      }
      return newList;
    });
  };

  const handleonSelect = useCallback(
    (data: {
      start: number;
      end: number;
      beforeText: string;
      afterText: string;
      index: number;
    }) => {
      selectionTextRef.current = data;
    },
    []
  );

  const handleOnPaste = useCallback(
    (e: any, index: number) => {
      if (!multiplePasteEnable.current) return;
      const text = e.clipboardData.getData('text');
      if (text) {
        const dataLlist = text.split('\n').map((item: string) => {
          return {
            content: item?.trim(),
            name: '',
            uid: setMessageId(),
            role: 'user'
          };
        });
        dataLlist[0].content = `${selectionTextRef.current?.beforeText || ''}${dataLlist[0].content}${selectionTextRef.current?.afterText || ''}`;
        const result = [
          ...textList.slice(0, index),
          ...dataLlist,
          ...textList.slice(index + 1)
        ].filter((item) => item.content || item.imgs?.length);

        setTextList(result);
      }
    },
    [textList]
  );

  const handleClearDocuments = () => {
    setTextList([
      {
        content: '',
        uid: -1,
        name: '',
        role: 'user'
      },
      {
        content: '',
        uid: -2,
        name: '',
        role: 'user'
      }
    ]);
    setScatterData([]);
    setTokenResult(null);
    setLessTwoInput(false);
    setEmbeddingData({
      code: '',
      copyValue: ''
    });
  };

  const handleOutputTypeChange = (value: string) => {
    setOutputType(value);
  };

  const renderExtra = useMemo(() => {
    if (modelMeta?.n_ctx && modelMeta?.n_slot) {
      return (
        <Form.Item>
          <CInputNumber
            disabled
            label="Max Tokens"
            value={_.floor(_.divide(modelMeta?.n_ctx, modelMeta?.n_slot))}
          ></CInputNumber>
        </Form.Item>
      );
    }
    return [];
  }, [modelMeta]);

  const outputItems = useMemo(() => {
    return [
      {
        key: 'chart',
        label: 'Chart',
        children: (
          <ScatterChart
            key={collapse ? 'collapse' : 'expand'}
            seriesData={scatterData}
            height={outputHeight}
            width="100%"
            xAxisData={[]}
          ></ScatterChart>
        )
      },
      {
        key: 'json',
        label: 'JSON',
        children: (
          <div
            style={{
              backgroundColor: 'var(--ant-color-bg-container)',
              borderRadius: 'var(--border-radius-base)',
              overflow: 'hidden'
            }}
          >
            <HighlightCode
              height={outputHeight - 32}
              code={embeddingData.code}
              copyValue={embeddingData.copyValue}
              lang="json"
              copyable={true}
              style={{ marginBottom: 0 }}
            ></HighlightCode>
          </div>
        )
      }
    ];
  }, [outputHeight, collapse, scatterData, embeddingData]);

  const onValuesChange = useMemoizedFn(
    (changeValues: Record<string, any>, allValues: Record<string, any>) => {
      if (changeValues.model) {
        setScatterData([]);
        setTokenResult(null);
      }
      handleOnValuesChange(changeValues, allValues);
    }
  );

  useEffect(() => {
    if (scroller.current) {
      initialize(scroller.current);
    }
  }, [initialize]);

  useEffect(() => {
    if (textList.length > messageListLengthCache.current) {
      updateDocumentScrollerPosition();
    }
    messageListLengthCache.current = textList.length;
  }, [textList.length]);

  useEffect(() => {
    if (intl.locale || 'en-US') {
      const sample = embeddingSamples[intl.locale];

      if (sample) {
        setTextList(
          sample.map((item: string, index: number) => ({
            content: item,
            uid: setMessageId(),
            name: `Document ${index + 1}`,
            role: 'user'
          }))
        );
      }
    }
  }, []);

  return (
    <div className="ground-left-wrapper rerank">
      <div className="ground-left">
        <div
          className="center"
          ref={scroller}
          style={{ height: 'auto', maxHeight: '100%' }}
        >
          <div className="documents">
            <div className="flex-between m-b-8 doc-header">
              <h3 className="m-l-10 flex-between flex-center font-size-14 line-24 m-b-0">
                <div className="flex gap-20">
                  <span>
                    {intl.formatMessage({
                      id: 'playground.embedding.documents'
                    })}
                  </span>
                </div>
              </h3>
              <div className="flex-center gap-10">
                <Tooltip
                  title={intl.formatMessage({
                    id: 'playground.input.multiplePaste.tips'
                  })}
                >
                  <Checkbox
                    defaultChecked={multiplePasteEnable.current}
                    onChange={(e: any) => {
                      multiplePasteEnable.current = e.target.checked;
                    }}
                  >
                    {intl.formatMessage({
                      id: 'playground.input.multiplePaste'
                    })}
                    <QuestionCircleOutlined className="m-l-4" />
                  </Checkbox>
                </Tooltip>

                <Button
                  size="middle"
                  onClick={handleAddText}
                  disabled={loading}
                >
                  <PlusOutlined />
                  {intl.formatMessage({ id: 'playground.embedding.addtext' })}
                </Button>
                <Button
                  icon={<ClearOutlined />}
                  size="middle"
                  disabled={loading}
                  onClick={handleClearDocuments}
                >
                  {intl.formatMessage({ id: 'common.button.clear' })}
                </Button>
                {!loading ? (
                  <Tooltip
                    title={
                      <span>
                        {intl.formatMessage({ id: 'common.button.submit' })}
                      </span>
                    }
                  >
                    <Button
                      size="middle"
                      type="primary"
                      disabled={inputEmpty}
                      onClick={handleSendMessage}
                      icon={
                        <SendOutlined rotate={0} className="font-size-14" />
                      }
                      style={{ width: 60 }}
                    ></Button>
                  </Tooltip>
                ) : (
                  <Tooltip
                    title={intl.formatMessage({ id: 'common.button.stop' })}
                  >
                    <Button
                      style={{ width: 60 }}
                      size="middle"
                      type="primary"
                      onClick={handleStopConversation}
                      icon={
                        <IconFont
                          type="icon-stop1"
                          className="font-size-12"
                        ></IconFont>
                      }
                    ></Button>
                  </Tooltip>
                )}
              </div>
            </div>
            <div className="docs-wrapper">
              <InputList
                ref={inputListRef}
                textList={textList}
                onChange={handleTextListChange}
                onSelect={handleonSelect}
                onPaste={handleOnPaste}
                onUploadImage={handleOnUploadImage}
                onDeleteImage={handleOnDeleteImage}
              ></InputList>
              {lessTwoInput && (
                <div className="m-t-16">
                  <AlertInfo
                    type="danger"
                    message={intl.formatMessage({
                      id: 'playground.documents.verify.embedding'
                    })}
                  ></AlertInfo>
                </div>
              )}
              <TokenUsage
                tokenResult={tokenResult}
                className="m-t-16"
              ></TokenUsage>
            </div>
          </div>
        </div>

        <div
          className="ground-left-footer"
          style={{
            width: '100%',
            padding: '0 var(--layout-content-inlinepadding) 16px'
          }}
        >
          <h3 className="m-l-10 flex-between flex-center font-size-14 line-24 m-b-16">
            <div className="flex gap-16">
              <span className="flex-center">
                {intl.formatMessage({ id: 'playground.embedding.output' })}
                <Tooltip
                  title={
                    <span className="flex-column">
                      <span>
                        1.
                        {intl.formatMessage({
                          id: 'playground.embedding.pcatips1'
                        })}
                      </span>
                      <span>
                        2.{' '}
                        {intl.formatMessage({
                          id: 'playground.embedding.pcatips2'
                        })}
                      </span>
                    </span>
                  }
                >
                  <QuestionCircleOutlined className="m-l-4" />
                </Tooltip>
              </span>
              <AlertInfo
                type="danger"
                style={{ marginRight: 16 }}
                message={tokenResult?.errorMessage}
              ></AlertInfo>
            </div>
            <Segmented
              onChange={handleOutputTypeChange}
              value={outputType}
              size="middle"
              options={[
                {
                  label: intl.formatMessage({
                    id: 'playground.embedding.chart'
                  }),
                  value: 'chart'
                },
                { label: 'JSON', value: 'json' }
              ]}
            ></Segmented>
          </h3>
          <div className="embed-chart">
            {loading && (
              <div
                style={{
                  position: 'absolute',
                  top: 0,
                  left: 0,
                  right: 0,
                  bottom: 0,
                  zIndex: 10,
                  display: 'flex',
                  justifyContent: 'center',
                  alignItems: 'center'
                }}
              >
                <Spin spinning={true} size="middle"></Spin>
              </div>
            )}
            <ResizePanel
              ref={resizeRef}
              maxHeight={resizeMaxHeight}
              minHeight={180}
              defaultHeight={180}
              onResize={handleScaleResize}
              onResizeStop={handleScaleOutputSize}
            >
              <div
                style={{
                  border: '1px solid var(--ant-color-border)',
                  borderRadius: 'var(--border-radius-base)',
                  width: '100%'
                }}
                className="scatter"
              >
                <Tabs
                  defaultActiveKey={outputType}
                  activeKey={outputType}
                  centered
                  renderTabBar={() => <></>}
                  items={outputItems}
                ></Tabs>
              </div>
            </ResizePanel>
          </div>
        </div>
      </div>
      <RightContainer collapsed={collapse}>
        <DataForm
          ref={formRef}
          onValuesChange={onValuesChange}
          initialValues={{}}
          modelList={modelList}
        />
      </RightContainer>
      <ViewCommonCode
        open={show}
        viewCodeContent={viewCodeContent}
        onCancel={handleCloseViewCode}
        title={intl.formatMessage({ id: 'playground.viewcode' })}
      ></ViewCommonCode>
    </div>
  );
});

export default GroundEmbedding;
