import React, { useState, useEffect } from 'react';
import { useTranslation } from 'react-i18next';
import {
  EyeOutlined,
  EyeInvisibleOutlined,
  NodeIndexOutlined,
  DisconnectOutlined,
  TagOutlined,
  SearchOutlined,
  HighlightOutlined
} from '@ant-design/icons';

const isBrowser = typeof window !== 'undefined';
const G6 = isBrowser ? require('../../dist/g6.min.js') : null;
const insertCss = isBrowser ? require('insert-css') : null;
const modifyCSS = isBrowser ? require('@antv/dom-util/lib/modify-css').default : null;

if (isBrowser) {
  insertCss(`
  #canvas-menu {
    position: absolute;
    z-index: 2;
    left: 16px;
    top: 80px;
    width: fit-content;
    padding: 8px 16px;
    background-color: rgba(54, 59, 64, 0);
    border-radius: 24px;
    box-shadow: 0 5px 18px 0 rgba(0, 0, 0, 0);
    font-family: PingFangSC-Semibold;
    transition: all 0.2s linear;
  }
  #canvas-menu:hover {
    background-color: rgba(54, 59, 64, 1);
    box-shadow: 0 5px 18px 0 rgba(0, 0, 0, 0.6);
  }
  .icon-span {
    padding-left: 8px;
    padding-right: 8px;
    cursor: pointer;
  }
  #search-node-input {
    background-color: rgba(60, 60, 60, 0.95);
    border-radius: 21px;
    width: 100px;
    border-color: rgba(80, 80, 80, 0.95);
    border-style: solid;
    color: rgba(255, 255, 255, 0.85);
  }
  #submit-button {
    background-color: rgba(82, 115, 224, 0.2);
    border-radius: 21px;
    border-color: rgb(82, 115, 224);
    border-style: solid;
    color: rgba(152, 165, 254, 1);
    margin-left: 4px;
  }
  .menu-tip {
    position: absolute;
    right: calc(30% + 32px);
    width: fit-content;
    height: 40px;
    line-height: 40px;
    top: 80px;
    padding-left: 16px;
    padding-right: 16px;
    background-color: rgba(54, 59, 64, 0.5);
    color: rgba(255, 255, 255, 0.65);
    border-radius: 8px;
    transition: all 0.2s linear;
    font-family: PingFangSC-Semibold;
  }
  #g6-canavs-menu-item-tip {
    position: absolute;
    background-color: rgba(0,0,0, 0.65);
    padding: 10px;
    box-shadow: rgba(0, 0, 0, 0.6) 0px 0px 10px;
    width: fit-content;
    color: #fff;
    border-radius: 8px;
    font-size: 12px;
    height: fit-content;
    font-family: PingFangSC-Semibold;
    transition: all 0.2s linear;
  }
`);
}

let fishEye = null;

const CanvasMenu: React.FC<{
  graph: any;
  clickFisheyeIcon: (onlyDisable?: boolean) => void;
  clickLassoIcon: (onlyDisable?: boolean) => void;
  fisheyeEnabled: boolean;
  lassoEnabled: boolean;
  edgeLabelVisible: boolean;
  setEdgeLabelVisible: (vis: boolean) => void;
  searchNode: (id: string) => boolean;
  handleFindPath: () => void;
  stopLayout: () => void;
}> = ({
  graph,
  clickFisheyeIcon,
  clickLassoIcon,
  fisheyeEnabled,
  lassoEnabled,
  stopLayout,
  edgeLabelVisible,
  setEdgeLabelVisible,
  searchNode,
  handleFindPath
}) => {
    const { t } = useTranslation();

    // menu tip, 例如 “按下 ESC 退出鱼眼”
    const [menuTip, setMenuTip] = useState({
      text: '',
      display: 'none',
      opacity: 0
    });

    // menu item tip
    const [menuItemTip, setMenuItemTip] = useState({
      text: '',
      display: 'none',
      opacity: 0
    });

    const [enableSearch, setEnableSearch] = useState(false);

    const [enableSelectPathEnd, setEnableSelectPathEnd] = useState(false);

    const clickEdgeLabelController = () => {
      setEdgeLabelVisible(!edgeLabelVisible);
    }

    const handleEnableSearch = () => {
      // 关闭 lasso 框选
      if (lassoEnabled) clickLassoIcon(true)
      // 关闭选择路径端点
      if (enableSelectPathEnd) setEnableSelectPathEnd(false);
      // 关闭搜索节点框
      if (enableSearch) setEnableSearch(false);
      // 关闭 fisheye
      if (fisheyeEnabled && fishEye) {
        graph.removePlugin(fishEye);
        clickFisheyeIcon(true);
      }
      setEnableSearch(old => {
        if (old) {
          // 设置 menuTip
          setMenuTip({
            text: '',
            display: 'none',
            opacity: 0
          });
          return false;
        }

        // 设置 menuTip
        setMenuTip({
          text: t('输入需要搜索的节点 ID，并点击 Submit 按钮'),
          display: 'block',
          opacity: 1
        });
        return true;
      });
    }
    // 放大
    const handleZoomOut = () => {
      if (!graph || graph.destroyed) return;
      const current = graph.getZoom();
      const canvas = graph.get('canvas');
      const point = canvas.getPointByClient(canvas.get('width') / 2, canvas.get('height') / 2);
      const pixelRatio = canvas.get('pixelRatio') || 1;
      const ratio = 1 + 0.05 * 5;
      if (ratio * current > 5) {
        return;
      }
      graph.zoom(ratio, { x: point.x / pixelRatio, y: point.y / pixelRatio });
    };

    // 缩小
    const handleZoomIn = () => {
      if (!graph || graph.destroyed) return;

      const current = graph.getZoom();
      const canvas = graph.get('canvas');
      const point = canvas.getPointByClient(canvas.get('width') / 2, canvas.get('height') / 2);
      const pixelRatio = canvas.get('pixelRatio') || 1;
      const ratio = 1 - 0.05 * 5;
      if (ratio * current < 0.3) {
        return;
      }
      graph.zoom(ratio, { x: point.x / pixelRatio, y: point.y / pixelRatio });
    };

    const handleFitViw = () => {
      if (!graph || graph.destroyed) return;
      graph.fitView(16);
    }

    const handleSearchNode = () => {
      const value = (document.getElementById('search-node-input') as HTMLInputElement).value;
      const found = searchNode(value);
      if (!found) setMenuTip({
        text: t('没有找到该节点'),
        display: 'block',
        opacity: 1
      });
    }

    const showItemTip = (e, text) => {
      const { clientX: x, clientY: y } = e;
      setMenuItemTip({
        text,
        display: 'block',
        opacity: 1
      });
      const tipDom = document.getElementById('g6-canavs-menu-item-tip')
      modifyCSS(tipDom, {
        top: `${124}px`,
        left: `${x - 20}px`,
        zIndex: 100,
      });
    };

    const hideItemTip = () => {
      setMenuItemTip({
        text: '',
        display: 'none',
        opacity: 0
      });
      const tipDom = document.getElementById('g6-canavs-menu-item-tip')
      modifyCSS(tipDom, {
        zIndex: -100,
      });
    }
    /**
     * 打开或关闭鱼眼放大功能
     */
    const toggleFishEye = () => {

      if (!graph || graph.destroyed) return;

      // 设置鼠标样式为默认
      graph.get('canvas').setCursor('default');

      // 关闭 FishEye
      if (fisheyeEnabled && fishEye) {
        graph.removePlugin(fishEye);
        graph.setMode('default')

        // 设置 menuTip
        setMenuTip({
          text: t('按下 Esc 键退出鱼眼放大镜'),
          display: 'none',
          opacity: 0
        });
      } else {
        // 停止布局
        stopLayout();

        // 关闭 lasso 框选
        if (lassoEnabled) clickLassoIcon(true)
        // 关闭选择路径端点
        if (enableSelectPathEnd) setEnableSelectPathEnd(false);
        // 关闭搜索节点框
        if (enableSearch) setEnableSearch(false);

        // 设置 menuTip
        setMenuTip({
          text: t('按下 Esc 键退出鱼眼放大镜'),
          display: 'block',
          opacity: 1
        });

        // 将交互模式切换到鱼眼只读模式，即不能缩放画布、框选节点、拉索选择节点等可能和鱼眼有冲突的操作
        graph.setMode('fisheyeMode');
        // 开启 FishEye
        fishEye = new G6.Fisheye({
          r: 249,
          scaleRByWheel: true,
          minR: 100,
          maxR: 500
          // showLabel: true,
        });

        graph.addPlugin(fishEye);
      }
      clickFisheyeIcon();
    };

    // 开启 lasso select 功能
    const enabledLassoSelect = () => {
      if (!graph || graph.destroyed) return;
      clickLassoIcon();
      if (!lassoEnabled) {
        graph.setMode('lassoSelect');

        // 设置鼠标样式为十字形
        graph.get('canvas').setCursor('crosshair');

        // 关闭 fisheye
        if (fisheyeEnabled && fishEye) {
          graph.removePlugin(fishEye);
          clickFisheyeIcon(true);
        }
        // 关闭选择路径端点
        if (enableSelectPathEnd) setEnableSelectPathEnd(false);
        // 关闭搜索节点框
        if (enableSearch) setEnableSearch(false);

        // 设置 menuTip
        setMenuTip({
          text: t('按下 Esc 键退出拉索选择模式'),
          display: 'block',
          opacity: 1
        });

      } else {
        graph.setMode('default');

        // 设置鼠标样式为默认
        graph.get('canvas').setCursor('default');

        // 设置 menuTip
        setMenuTip({
          text: t('按下 Esc 键退出拉索选择模式'),
          display: 'none',
          opacity: 0
        });
      }
    }

    // 开启选择两个节点显示最短路径
    const handleEnableSelectPathEnd = () => {
      setEnableSelectPathEnd(old => {
        if (!old) {
          graph.setMode('default');
          // 关闭 fisheye
          if (fishEye) {
            graph.removePlugin(fishEye);
            clickFisheyeIcon(true);
          }
          // 关闭 lasso 框选
          if (lassoEnabled) clickLassoIcon(true)

          // 关闭搜索节点框
          if (enableSearch) setEnableSearch(false);

          // 设置 menuTip
          setMenuTip({
            text: t('按住 SHIFT 键并点选两个节点作为路径起终点'),
            display: 'block',
            opacity: 1
          });
          return true;
        }
        // 设置 menuTip
        setMenuTip({
          text: '',
          display: 'none',
          opacity: 0
        });
        return false;
      })
    }

    const escListener = e => {
      if (!graph || graph.destroyed) return;
      if (e.key !== 'Escape') return;
      if (fishEye) {
        graph.removePlugin(fishEye);
        clickFisheyeIcon(true);
      }
      // 关闭 lasso 框选
      graph.setMode('default');
      // 关闭搜索节点框
      setEnableSearch(false);
      // 关闭选择路径端点
      setEnableSelectPathEnd(false);

      // 设置鼠标样式为默认
      graph.get('canvas').setCursor('default');
      clickLassoIcon(true);

      // 设置 menuTip
      setMenuTip({
        text: t('按下 Esc 键退出当前模式'),
        display: 'none',
        opacity: 0
      });
    }

    useEffect(() => {
      if (typeof window !== 'undefined') {
        window.addEventListener("keydown", escListener.bind(this));
        return window.removeEventListener("keydown", escListener.bind(this));
      }
    }, []);

    const iconStyle = {
      disable: { color: 'rgba(255, 255, 255, 0.85)' },
      enable: { color: 'rgba(82, 115, 224, 1)' },
    };

    return (
      <>
        <div id='canvas-menu'>
          <div className='icon-container'>
            <span className='icon-span'
              style={{ backgroundColor: 'rgba(0, 0, 0, 0)' }}
              onClick={clickEdgeLabelController}
              onMouseEnter={e => showItemTip(e, edgeLabelVisible ? t('隐藏边标签') : t('显示边标签'))}
              onMouseLeave={hideItemTip}
            >
              {edgeLabelVisible ? <DisconnectOutlined style={iconStyle.enable} /> : <TagOutlined style={iconStyle.disable} />}
            </span>
            <span className='icon-span'
              onClick={toggleFishEye}
              onMouseEnter={e => showItemTip(e, fisheyeEnabled ? t('关闭鱼眼放大镜') : t('打开鱼眼放大镜'))}
              onMouseLeave={hideItemTip}
            >
              {fisheyeEnabled ? <EyeInvisibleOutlined style={iconStyle.enable} /> : <EyeOutlined style={iconStyle.disable} />}
            </span>
            <span className='icon-span'
              onClick={enabledLassoSelect}
              onMouseEnter={e => showItemTip(e, lassoEnabled ? t('关闭拉索选择模式') : t('打开拉索选择模式'))}
              onMouseLeave={hideItemTip}
            >
              <HighlightOutlined style={lassoEnabled ? iconStyle.enable : iconStyle.disable} />
            </span>
            <span className='icon-span'
              onClick={handleEnableSelectPathEnd}
              onMouseEnter={e => showItemTip(e, t('搜索最短路径'))}
              onMouseLeave={hideItemTip}
            >
              <NodeIndexOutlined style={enableSelectPathEnd ? iconStyle.enable : iconStyle.disable} />
            </span>
            <span className='icon-span' style={{ width: 'fit-content', ...iconStyle.disable }} >
              <span className='zoom-icon'
                onClick={handleZoomIn}
                onMouseEnter={e => showItemTip(e, t('缩小'))}
                onMouseLeave={hideItemTip}
              >
                -
            </span>
              <span className='zoom-icon'
                onClick={handleFitViw}
                onMouseEnter={e => showItemTip(e, t('图内容适配容器，快捷键：ctrl + 1'))}
                onMouseLeave={hideItemTip}
                style={{ paddingLeft: '8px', paddingRight: '8px' }}
              >
                FIT
            </span>
              <span className='zoom-icon'
                onClick={handleZoomOut}
                onMouseEnter={e => showItemTip(e, t('放大'))}
                onMouseLeave={hideItemTip}
              >
                +
            </span>
            </span>
            <span className='icon-span'
              onClick={handleEnableSearch}
              onMouseEnter={e => showItemTip(e, t('输入 ID 搜索节点'))}
              onMouseLeave={hideItemTip}
            >
              <SearchOutlined style={enableSearch ? iconStyle.enable : iconStyle.disable} />
            </span>
            {enableSearch &&
              <span
                onMouseEnter={e => showItemTip(e, t('输入需要搜索的节点 ID，并点击 Submit 按钮'))}
                onMouseLeave={hideItemTip}
              >
                <input type="text" id="search-node-input" />
                <button id="submit-button" onClick={handleSearchNode}>Submit</button>
              </span>
            }
            {enableSelectPathEnd &&
              <span
                onMouseEnter={e => showItemTip(e, t('选择有且仅有两个节点作为端点，并点击 Find Path 按钮'))}
                onMouseLeave={hideItemTip}
              >
                <button id="submit-button" onClick={handleFindPath}>Find Path</button>
              </span>}
          </div>
        </div>
        <div className='menu-tip' style={{ opacity: menuTip.opacity }}>
          {menuTip.text}
        </div>
        <div id='g6-canavs-menu-item-tip' style={{ opacity: menuItemTip.opacity }}>
          {menuItemTip.text}
        </div>
      </>
    );
  };

export default CanvasMenu;