import { useRef, useState, useEffect } from 'react';
import {
  Compass,
  CompassContent,
  CompassMainHeader,
  CompassDockMain,
  Panel,
  PanelMain,
  PanelMainBody,
  Title,
  NavItem,
  NavList,
  Nav,
  Brand,
  MastheadLogo,
  MastheadBrand,
  MastheadContent,
  MastheadMain,
  MastheadToggle,
  Masthead,
  Toolbar,
  ToolbarContent,
  ToolbarItem,
  ToolbarGroup,
  MenuToggle,
  Button,
  Tooltip,
  Divider,
  PageToggleButton,
  NavExpandable
} from '@patternfly/react-core';
import RhUiFolderFillIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-folder-fill-icon';
import RhUiQuestionMarkCircleFillIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-question-mark-circle-fill-icon';
import RhUiCloudFillIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-cloud-fill-icon';
import RhUiCodeIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-code-icon';
import RhMicronsSearchIcon from '@patternfly/react-icons/dist/esm/icons/rh-microns-search-icon';
import RhUiCubesIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-cubes-icon';
import RhUiFolderIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-folder-icon';
import RhUiResourceIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-resource-icon';
import pfLogo from '../../assets/PF-IconLogo-color.svg';
import RhUiThumbnailViewSmallFillIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-thumbnail-view-small-fill-icon';
import globalBreakpointLg from '@patternfly/react-tokens/dist/esm/t_global_breakpoint_lg';
import { IS_INERT } from '../../../helpers/inert';
interface NavOnSelectProps {
  groupId: number | string;
  itemId: number | string;
  to: string;
}

export const CompassDockDemo: React.FunctionComponent = () => {
  const [activeItem, setActiveItem] = useState<number>(0);
  const [isNavGroupExpanded, setIsNavGroupExpanded] = useState(false);
  const [isDockExpanded, setIsDockExpanded] = useState(false);
  const [isDockOverlay, setIsDockOverlay] = useState(false);
  const [isMobile, setIsMobile] = useState(false);

  useEffect(() => {
    const mobileBreakpoint = Number.parseInt(globalBreakpointLg.value) * 16;
    const mediaQuery = window.matchMedia(`(max-width: ${mobileBreakpoint}px)`);
    const handleResize = (e: MediaQueryListEvent | MediaQueryList) => {
      setIsMobile(e.matches);
    };

    handleResize(mediaQuery);
    mediaQuery.addEventListener('change', handleResize);

    return () => mediaQuery.removeEventListener('change', handleResize);
  }, []);

  const handleDockClickOutside = (event: MouseEvent) => {
    if (!isDockExpanded) {
      return;
    }

    const dockedMastheadElement = document.getElementById('docked-masthead');
    const dockedMobileMastheadToggle = document.getElementById('mobile-masthead-toggle');

    if (
      dockedMastheadElement &&
      !dockedMastheadElement.contains(event.target as Node) &&
      !dockedMobileMastheadToggle?.contains(event.target as Node) &&
      isDockExpanded &&
      (isDockOverlay || isMobile)
    ) {
      setIsDockExpanded(false);
      setIsDockOverlay(false);
    }
  };

  const handleDockKeydown = (_event: KeyboardEvent) => {
    if (!isDockExpanded) {
      return;
    }

    if (_event.key === 'Escape') {
      setIsDockExpanded(false);
      setIsDockOverlay(false);
    }
  };

  useEffect(() => {
    window.addEventListener('click', handleDockClickOutside);
    window.addEventListener('keydown', handleDockKeydown);

    return () => {
      window.removeEventListener('click', handleDockClickOutside);
      window.removeEventListener('keydown', handleDockKeydown);
    };
  }, [isDockOverlay, isDockExpanded, isMobile]);

  const onNavSelect = (_event: React.FormEvent<HTMLInputElement>, selectedItem: NavOnSelectProps) => {
    typeof selectedItem.itemId === 'number' && setActiveItem(selectedItem.itemId);

    if (isDockExpanded && !isDockOverlay && !isMobile) {
      return;
    }

    setIsDockExpanded(false);
    setIsDockOverlay(false);
  };

  const navItem1Ref = useRef<HTMLAnchorElement>(null);
  const navItem2Ref = useRef<HTMLAnchorElement>(null);
  const navItem3Ref = useRef<HTMLAnchorElement>(null);
  const navItem4Ref = useRef<HTMLAnchorElement>(null);
  const navItem5Ref = useRef<HTMLAnchorElement>(null);
  const navItem6Ref = useRef<HTMLAnchorElement>(null);
  const settingsRef = useRef<HTMLButtonElement>(null);
  const helpRef = useRef<HTMLButtonElement>(null);
  const appsRef = useRef<HTMLButtonElement>(null);
  const mobileToggleRef = useRef<HTMLButtonElement>(null);
  const dockedToggleRef = useRef<HTMLButtonElement>(null);

  const onMobileToggle = () => {
    setIsDockExpanded(!isDockExpanded);

    setTimeout(() => {
      dockedToggleRef.current?.focus();
    }, 200);
  };

  const onToggleDock = () => {
    const nextState = !isDockExpanded;
    if (!nextState) {
      setIsDockOverlay(false);
    }
    setIsDockExpanded(nextState);

    if (isMobile) {
      if (isDockExpanded) {
        setTimeout(() => {
          mobileToggleRef.current?.focus();
        }, 200);
      }
    }
  };

  const onToggleNavGroup = (_event: React.MouseEvent<HTMLButtonElement>, isExpanded: boolean) => {
    if (!isDockExpanded) {
      setIsNavGroupExpanded(true);
      setIsDockOverlay(true);
      setIsDockExpanded(true);
    } else {
      setIsNavGroupExpanded(isExpanded);
    }
  };

  const mobileTextLogo = (
    <svg height="37px" viewBox="0 0 679 158">
      <title>PatternFly</title>
      <defs>
        <linearGradient x1="68%" y1="2.25860997e-13%" x2="32%" y2="100%" id="linearGradient-">
          <stop stopColor="#2B9AF3" offset="0%"></stop>
          <stop stopColor="#73BCF7" stopOpacity="0.502212631" offset="100%"></stop>
        </linearGradient>
      </defs>
      <g stroke="none" strokeWidth="1" fill="none" fillRule="evenodd">
        <g
          transform="translate(206.000000, 45.750000)"
          fill="var(--pf-t--global--text--color--regular)"
          fillRule="nonzero"
        >
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        </g>
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            fill="#0066CC"
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          <path
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          ></path>
          <path
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          ></path>
        </g>
      </g>
    </svg>
  );

  const dockTextLogo = (
    <svg height="37px" viewBox="0 0 679 158">
      <title>PatternFly</title>
      <defs>
        <linearGradient x1="68%" y1="2.25860997e-13%" x2="32%" y2="100%" id="linearGradient-compass-docked-demo">
          <stop stopColor="#2B9AF3" offset="0%"></stop>
          <stop stopColor="#73BCF7" stopOpacity="0.502212631" offset="100%"></stop>
        </linearGradient>
      </defs>
      <g stroke="none" strokeWidth="1" fill="none" fillRule="evenodd">
        <g
          transform="translate(206.000000, 45.750000)"
          fill="var(--pf-t--global--text--color--regular)"
          fillRule="nonzero"
        >
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          <path
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        </g>
      </g>
    </svg>
  );

  // Mobile masthead - shown on mobile viewports only, hidden on desktop
  const mobileMasthead = (
    <Masthead display={{ default: 'inline' }} id="mobile-masthead">
      <MastheadMain>
        <MastheadToggle>
          <PageToggleButton
            innerRef={mobileToggleRef}
            variant="plain"
            aria-label="Global navigation"
            isSidebarOpen={isDockExpanded}
            onSidebarToggle={onMobileToggle}
            isHamburgerButton
            id="mobile-masthead-toggle"
          />
        </MastheadToggle>
        <MastheadBrand>
          <MastheadLogo component={(props) => <a {...props} href="#" />}>{mobileTextLogo}</MastheadLogo>
        </MastheadBrand>
      </MastheadMain>
      <MastheadContent>
        <Toolbar isStatic id="mobile-toolbar">
          <ToolbarContent>
            <ToolbarItem align={{ default: 'alignEnd' }}>
              <Button variant="plain" icon={<RhMicronsSearchIcon />} aria-label="Search" />
            </ToolbarItem>
          </ToolbarContent>
        </Toolbar>
      </MastheadContent>
    </Masthead>
  );

  // Docked masthead - vertical navigation sidebar
  const dockContent = (
    <CompassDockMain {...(isMobile && !isDockExpanded && { inert: IS_INERT })}>
      <Masthead display={{ default: undefined }} id="docked-masthead" variant="docked">
        <MastheadMain>
          <MastheadToggle>
            <Button
              ref={dockedToggleRef}
              variant="plain"
              isHamburger
              onClick={onToggleDock}
              aria-label="Global navigation"
              isExpanded={isDockExpanded}
            />
          </MastheadToggle>
          <MastheadBrand>
            <MastheadLogo component={(props) => <a {...props} href="#" />} isCompact>
              <Brand src={pfLogo} alt="PatternFly" heights={{ default: '37px' }} />
            </MastheadLogo>
            <MastheadLogo component={(props) => <a {...props} href="#" />}>{dockTextLogo}</MastheadLogo>
          </MastheadBrand>
        </MastheadMain>
        <Divider />
        <MastheadContent>
          <Toolbar id="toolbar" isVertical>
            <ToolbarContent>
              <ToolbarItem>
                <Nav onSelect={onNavSelect} variant="docked" aria-label="Global" ouiaId="IconNav">
                  <NavList>
                    <NavItem
                      key="nav-icon-link1"
                      preventDefault
                      id="nav-icon-link1"
                      to="#nav-icon-link1"
                      itemId={0}
                      isActive={activeItem === 0}
                      icon={<RhUiCubesIcon />}
                      anchorRef={navItem1Ref}
                      aria-label="System panel"
                    >
                      System panel
                    </NavItem>
                    <NavExpandable
                      title="Folder"
                      groupId={4}
                      isExpanded={isNavGroupExpanded}
                      icon={<RhUiFolderIcon />}
                      hasExpandableIcon={!isMobile}
                      buttonProps={{ ref: navItem5Ref, 'aria-label': 'Folder' }}
                      onExpand={onToggleNavGroup}
                    >
                      <NavItem
                        preventDefault
                        id="expandable3rd-1"
                        to="#expandable3rd-1"
                        groupId="nav-expand3rd-group-1"
                        itemId={5}
                        isActive={activeItem === 5}
                        icon={<RhUiResourceIcon />}
                        anchorRef={navItem6Ref}
                        aria-label="Subnav link 1"
                      >
                        Subnav link 1
                      </NavItem>
                    </NavExpandable>
                    <NavItem
                      key="nav-icon-link2"
                      preventDefault
                      id="nav-icon-link2"
                      to="#nav-icon-link2"
                      itemId={1}
                      isActive={activeItem === 1}
                      icon={<RhUiFolderFillIcon />}
                      anchorRef={navItem2Ref}
                      aria-label="Policy"
                    >
                      Policy
                    </NavItem>
                    <NavItem
                      key="nav-icon-link3"
                      preventDefault
                      id="nav-icon-link3"
                      to="#nav-icon-link3"
                      itemId={2}
                      isActive={activeItem === 2}
                      icon={<RhUiCloudFillIcon />}
                      anchorRef={navItem3Ref}
                      aria-label="Authentication"
                    >
                      Authentication
                    </NavItem>
                    <NavItem
                      key="nav-icon-link4"
                      preventDefault
                      id="nav-icon-link4"
                      to="#nav-icon-link4"
                      itemId={3}
                      isActive={activeItem === 3}
                      icon={<RhUiCodeIcon />}
                      anchorRef={navItem4Ref}
                      aria-label="Network services"
                    >
                      Network services
                    </NavItem>
                  </NavList>
                </Nav>
                {!isDockExpanded && (
                  <>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem1Ref} content="System panel"></Tooltip>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem2Ref} content="Policy"></Tooltip>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem3Ref} content="Authentication"></Tooltip>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem4Ref} content="Network services"></Tooltip>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem5Ref} content="Folder"></Tooltip>
                    <Tooltip aria="none" aria-live="off" triggerRef={navItem6Ref} content="Subnav link 1"></Tooltip>
                  </>
                )}
              </ToolbarItem>
              <ToolbarGroup
                variant="action-group-plain"
                align={{ default: 'alignEnd' }}
                gap={{ default: 'gapNone', md: 'gapMd' }}
              >
                <ToolbarItem>
                  {isDockExpanded ? (
                    <MenuToggle
                      ref={appsRef}
                      variant="plain"
                      icon={<RhUiThumbnailViewSmallFillIcon />}
                      isDocked
                      aria-label="Applications"
                    >
                      Applications
                    </MenuToggle>
                  ) : (
                    <Tooltip aria="none" aria-live="off" triggerRef={appsRef} content="Applications">
                      <MenuToggle
                        ref={appsRef}
                        variant="plain"
                        icon={<RhUiThumbnailViewSmallFillIcon />}
                        isDocked
                        aria-label="Applications"
                      >
                        Applications
                      </MenuToggle>
                    </Tooltip>
                  )}
                </ToolbarItem>
                <ToolbarItem>
                  {isDockExpanded ? (
                    <Button ref={settingsRef} aria-label="Settings" isSettings variant="plain" isDocked>
                      Settings
                    </Button>
                  ) : (
                    <Tooltip aria="none" aria-live="off" triggerRef={settingsRef} content="Settings">
                      <Button ref={settingsRef} aria-label="Settings" isSettings variant="plain" isDocked>
                        Settings
                      </Button>
                    </Tooltip>
                  )}
                </ToolbarItem>
                <ToolbarItem>
                  {isDockExpanded ? (
                    <MenuToggle
                      ref={helpRef}
                      variant="plain"
                      icon={<RhUiQuestionMarkCircleFillIcon />}
                      isDocked
                      aria-label="Help"
                    >
                      Help
                    </MenuToggle>
                  ) : (
                    <Tooltip aria="none" aria-live="off" triggerRef={helpRef} content="Help">
                      <MenuToggle
                        ref={helpRef}
                        variant="plain"
                        icon={<RhUiQuestionMarkCircleFillIcon />}
                        isDocked
                        aria-label="Help"
                      >
                        Help
                      </MenuToggle>
                    </Tooltip>
                  )}
                </ToolbarItem>
              </ToolbarGroup>
            </ToolbarContent>
          </Toolbar>
        </MastheadContent>
      </Masthead>
    </CompassDockMain>
  );

  const mainContent = (
    <>
      <CompassMainHeader title={<Title headingLevel="h1">Content title</Title>} panelProps={{ isGlass: true }} />
      <CompassContent>
        <Panel isScrollable isAutoHeight isGlass>
          <PanelMain>
            <PanelMainBody>Content</PanelMainBody>
          </PanelMain>
        </Panel>
      </CompassContent>
    </>
  );

  return (
    <Compass
      masthead={mobileMasthead}
      dock={dockContent}
      isDockExpanded={isDockExpanded}
      isDockOverlay={isDockOverlay}
      main={mainContent}
      backgroundSrcDark="/assets/images/pf-background.svg"
      backgroundSrcLight="/assets/images/pf-background.svg"
    />
  );
};