import React, { Component } from 'react';
import { Upload, Tooltip, Popover, Modal, Progress, message, Spin, Result } from 'antd';
import CopyToClipboard from 'react-copy-to-clipboard';
import { injectIntl } from 'react-intl';
import * as AntdIcons from '@ant-design/icons';

const allIcons: {
  [key: string]: any;
} = AntdIcons;

const { Dragger } = Upload;
interface AntdIconClassifier {
  load: Function;
  predict: Function;
}
declare global {
  interface Window {
    antdIconClassifier: AntdIconClassifier;
  }
}

interface PicSearcherProps {
  intl: any;
}

interface PicSearcherState {
  loading: boolean;
  modalVisible: boolean;
  popoverVisible: boolean;
  icons: Array<string>;
  fileList: Array<any>;
  error: boolean;
  modelLoaded: boolean;
}

interface iconObject {
  type: string;
  score: number;
}

class PicSearcher extends Component<PicSearcherProps, PicSearcherState> {
  state = {
    loading: false,
    modalVisible: false,
    popoverVisible: false,
    icons: [],
    fileList: [],
    error: false,
    modelLoaded: false,
  };

  componentDidMount() {
    this.loadModel();
    this.setState({ popoverVisible: !localStorage.getItem('disableIconTip') });
  }

  componentWillUnmount() {
    document.removeEventListener('paste', this.onPaste);
  }

  loadModel = () => {
    const script = document.createElement('script');
    script.onload = async () => {
      await window.antdIconClassifier.load();
      this.setState({ modelLoaded: true });
      document.addEventListener('paste', this.onPaste);
    };
    script.src = 'https://cdn.jsdelivr.net/gh/lewis617/antd-icon-classifier@0.0/dist/main.js';
    document.head.appendChild(script);
  };

  onPaste = (event: ClipboardEvent) => {
    const items = event.clipboardData && event.clipboardData.items;
    let file = null;
    if (items && items.length) {
      for (let i = 0; i < items.length; i += 1) {
        if (items[i].type.indexOf('image') !== -1) {
          file = items[i].getAsFile();
          break;
        }
      }
    }
    if (file) this.uploadFile(file);
  };

  uploadFile = (file: File) => {
    this.setState(() => ({ loading: true }));
    const reader: FileReader = new FileReader();
    reader.onload = () => {
      this.toImage(reader.result).then(this.predict);
      this.setState(() => ({
        fileList: [{ uid: 1, name: file.name, status: 'done', url: reader.result }],
      }));
    };
    reader.readAsDataURL(file);
  };

  toImage = (url: any) =>
    new Promise(resolve => {
      const img = new Image();
      img.setAttribute('crossOrigin', 'anonymous');
      img.src = url;
      img.onload = function onload() {
        resolve(img);
      };
    });

  predict = (imgEl: any) => {
    try {
      let icons = window.antdIconClassifier.predict(imgEl);
      if (gtag && icons.length >= 1) {
        gtag('event', 'icon', {
          event_category: 'search-by-image',
          event_label: icons[0].className,
        });
      }
      icons = icons.map((i: any) => ({ score: i.score, type: i.className.replace(/\s/g, '-') }));
      this.setState(() => ({ icons, loading: false, error: false }));
    } catch (err) {
      this.setState(() => ({ loading: false, error: true }));
    }
  };

  toggleModal = () => {
    this.setState(prev => ({
      modalVisible: !prev.modalVisible,
      popoverVisible: false,
      fileList: [],
      icons: [],
    }));
    if (!localStorage.getItem('disableIconTip')) {
      localStorage.setItem('disableIconTip', 'true');
    }
  };

  onCopied = (text: string) => {
    message.success(
      <span>
        <code className="copied-code">{text}</code> copied 🎉
      </span>,
    );
  };

  render() {
    const {
      intl: { messages },
    } = this.props;
    const {
      modalVisible,
      popoverVisible,
      icons,
      fileList,
      loading,
      modelLoaded,
      error,
    } = this.state;
    return (
      <div className="icon-pic-searcher">
        <Popover
          content={messages[`app.docs.components.icon.pic-searcher.intro`]}
          visible={popoverVisible}
        >
          <AntdIcons.CameraOutlined className="icon-pic-btn" onClick={this.toggleModal} />
        </Popover>
        <Modal
          title={messages[`app.docs.components.icon.pic-searcher.title`]}
          visible={modalVisible}
          onCancel={this.toggleModal}
          footer={null}
        >
          {modelLoaded || (
            <Spin
              spinning={!modelLoaded}
              tip={messages['app.docs.components.icon.pic-searcher.modelloading']}
            >
              <div style={{ height: 100 }} />
            </Spin>
          )}
          {modelLoaded && (
            <Dragger
              accept="image/jpeg, image/png"
              listType="picture"
              customRequest={(o: any) => this.uploadFile(o.file)}
              fileList={fileList}
              showUploadList={{ showPreviewIcon: false, showRemoveIcon: false }}
            >
              <p className="ant-upload-drag-icon">
                <AntdIcons.InboxOutlined />
              </p>
              <p className="ant-upload-text">
                {messages['app.docs.components.icon.pic-searcher.upload-text']}
              </p>
              <p className="ant-upload-hint">
                {messages['app.docs.components.icon.pic-searcher.upload-hint']}
              </p>
            </Dragger>
          )}
          <Spin spinning={loading} tip={messages['app.docs.components.icon.pic-searcher.matching']}>
            <div className="icon-pic-search-result">
              {icons.length > 0 && (
                <div className="result-tip">
                  {messages['app.docs.components.icon.pic-searcher.result-tip']}
                </div>
              )}
              <table>
                {icons.length > 0 && (
                  <thead>
                    <tr>
                      <th className="col-icon">
                        {messages['app.docs.components.icon.pic-searcher.th-icon']}
                      </th>
                      <th>{messages['app.docs.components.icon.pic-searcher.th-score']}</th>
                    </tr>
                  </thead>
                )}
                <tbody>
                  {icons.map((icon: iconObject) => {
                    const { type } = icon;
                    const iconName = `${type
                      .split('-')
                      .map(str => `${str[0].toUpperCase()}${str.slice(1)}`)
                      .join('')}Outlined`;

                    return (
                      <tr key={iconName}>
                        <td className="col-icon">
                          <CopyToClipboard text={`<${iconName} />`} onCopy={this.onCopied}>
                            <Tooltip title={icon.type} placement="right">
                              {React.createElement(allIcons[iconName])}
                            </Tooltip>
                          </CopyToClipboard>
                        </td>
                        <td>
                          <Progress percent={Math.ceil(icon.score * 100)} />
                        </td>
                      </tr>
                    );
                  })}
                </tbody>
              </table>
              {error && (
                <Result
                  status="500"
                  title="503"
                  subTitle={messages['app.docs.components.icon.pic-searcher.server-error']}
                />
              )}
            </div>
          </Spin>
        </Modal>
      </div>
    );
  }
}

export default injectIntl(PicSearcher);