import { useRef, useState, useEffect } from 'react';
import {
  Brand,
  Breadcrumb,
  BreadcrumbItem,
  Button,
  Card,
  CardBody,
  Content,
  Divider,
  Gallery,
  GalleryItem,
  Masthead,
  MastheadMain,
  MastheadLogo,
  MastheadContent,
  MastheadBrand,
  MastheadToggle,
  MenuToggle,
  Nav,
  NavItem,
  NavList,
  Page,
  PageSection,
  PageToggleButton,
  SkipToContent,
  Toolbar,
  ToolbarContent,
  ToolbarGroup,
  ToolbarItem,
  Tooltip
} from '@patternfly/react-core';
import RhUiQuestionMarkCircleFillIcon from '@patternfly/react-icons/dist/esm/icons/rh-ui-question-mark-circle-fill-icon';
import CubeIcon from '@patternfly/react-icons/dist/esm/icons/cube-icon';
import FolderIcon from '@patternfly/react-icons/dist/esm/icons/folder-icon';
import CloudIcon from '@patternfly/react-icons/dist/esm/icons/cloud-icon';
import CodeIcon from '@patternfly/react-icons/dist/esm/icons/code-icon';
import ThIcon from '@patternfly/react-icons/dist/esm/icons/th-icon';
import SearchIcon from '@patternfly/react-icons/dist/esm/icons/search-icon';
import pfIconLogo from '@patternfly/react-core/src/demos/assets/PF-IconLogo-color.svg';
import globalBreakpointXl from '@patternfly/react-tokens/dist/esm/t_global_breakpoint_xl';

interface NavOnSelectProps {
  groupId: number | string;
  itemId: number | string;
  to: string;
}

export const NavDockedNav: React.FunctionComponent = () => {
  const [activeItem, setActiveItem] = useState(1);
  const [isDockExpanded, setIsDockExpanded] = useState(false);
  const [isDockTextExpanded, setIsDockTextExpanded] = useState(false);
  const [isMobile, setIsMobile] = useState(false);

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

  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"
        >
          <path d="M0,65.25 L0,2.25 L33.21,2.25 C37.35,2.25 41.025,3.135 44.235,4.905 C47.445,6.675 49.98,9.09 51.84,12.15 C53.7,15.21 54.63,18.72 54.63,22.68 C54.63,26.46 53.7,29.865 51.84,32.895 C49.98,35.925 47.43,38.31 44.19,40.05 C40.95,41.79 37.29,42.66 33.21,42.66 L15.48,42.66 L15.48,65.25 L0,65.25 Z M15.48,29.88 L31.41,29.88 C33.69,29.88 35.52,29.22 36.9,27.9 C38.28,26.58 38.97,24.87 38.97,22.77 C38.97,20.61 38.28,18.855 36.9,17.505 C35.52,16.155 33.69,15.48 31.41,15.48 L15.48,15.48 L15.48,29.88 Z"></path>
          <path d="M77.04,66.06 C73.68,66.06 70.695,65.43 68.085,64.17 C65.475,62.91 63.435,61.17 61.965,58.95 C60.495,56.73 59.76,54.18 59.76,51.3 C59.76,46.74 61.485,43.215 64.935,40.725 C68.385,38.235 73.2,36.99 79.38,36.99 C83.1,36.99 86.7,37.44 90.18,38.34 L90.18,36 C90.18,31.26 87.15,28.89 81.09,28.89 C77.49,28.89 72.69,30.15 66.69,32.67 L61.47,21.96 C69.15,18.48 76.56,16.74 83.7,16.74 C90.3,16.74 95.43,18.315 99.09,21.465 C102.75,24.615 104.58,29.04 104.58,34.74 L104.58,65.25 L90.18,65.25 L90.18,62.37 C88.26,63.69 86.235,64.635 84.105,65.205 C81.975,65.775 79.62,66.06 77.04,66.06 Z M73.62,51.03 C73.62,52.53 74.28,53.7 75.6,54.54 C76.92,55.38 78.75,55.8 81.09,55.8 C84.69,55.8 87.72,55.05 90.18,53.55 L90.18,47.43 C87.42,46.71 84.54,46.35 81.54,46.35 C79.02,46.35 77.07,46.755 75.69,47.565 C74.31,48.375 73.62,49.53 73.62,51.03 Z"></path>
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        </g>
        <g transform="translate(0.000000, 0.000000)">
          <path
            d="M61.826087,0 L158,0 L158,96.173913 L147.695652,96.173913 C100.271201,96.173913 61.826087,57.7287992 61.826087,10.3043478 L61.826087,0 L61.826087,0 Z"
            fill="#0066CC"
          ></path>
          <path
            d="M158,3.43478261 L65.2608696,158 L138,158 C149.045695,158 158,149.045695 158,138 L158,3.43478261 L158,3.43478261 Z"
            fill="url(#linearGradient-)"
          ></path>
          <path
            d="M123.652174,-30.9130435 L30.9130435,123.652174 L103.652174,123.652174 C114.697869,123.652174 123.652174,114.697869 123.652174,103.652174 L123.652174,-30.9130435 L123.652174,-30.9130435 Z"
            fill="url(#linearGradient-)"
            transform="translate(77.282609, 46.369565) scale(1, -1) rotate(90.000000) translate(-77.282609, -46.369565) "
          ></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-nav-docked-expanded-example-masthead"
        >
          <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"
        >
          <path d="M0,65.25 L0,2.25 L33.21,2.25 C37.35,2.25 41.025,3.135 44.235,4.905 C47.445,6.675 49.98,9.09 51.84,12.15 C53.7,15.21 54.63,18.72 54.63,22.68 C54.63,26.46 53.7,29.865 51.84,32.895 C49.98,35.925 47.43,38.31 44.19,40.05 C40.95,41.79 37.29,42.66 33.21,42.66 L15.48,42.66 L15.48,65.25 L0,65.25 Z M15.48,29.88 L31.41,29.88 C33.69,29.88 35.52,29.22 36.9,27.9 C38.28,26.58 38.97,24.87 38.97,22.77 C38.97,20.61 38.28,18.855 36.9,17.505 C35.52,16.155 33.69,15.48 31.41,15.48 L15.48,15.48 L15.48,29.88 Z"></path>
          <path d="M77.04,66.06 C73.68,66.06 70.695,65.43 68.085,64.17 C65.475,62.91 63.435,61.17 61.965,58.95 C60.495,56.73 59.76,54.18 59.76,51.3 C59.76,46.74 61.485,43.215 64.935,40.725 C68.385,38.235 73.2,36.99 79.38,36.99 C83.1,36.99 86.7,37.44 90.18,38.34 L90.18,36 C90.18,31.26 87.15,28.89 81.09,28.89 C77.49,28.89 72.69,30.15 66.69,32.67 L61.47,21.96 C69.15,18.48 76.56,16.74 83.7,16.74 C90.3,16.74 95.43,18.315 99.09,21.465 C102.75,24.615 104.58,29.04 104.58,34.74 L104.58,65.25 L90.18,65.25 L90.18,62.37 C88.26,63.69 86.235,64.635 84.105,65.205 C81.975,65.775 79.62,66.06 77.04,66.06 Z M73.62,51.03 C73.62,52.53 74.28,53.7 75.6,54.54 C76.92,55.38 78.75,55.8 81.09,55.8 C84.69,55.8 87.72,55.05 90.18,53.55 L90.18,47.43 C87.42,46.71 84.54,46.35 81.54,46.35 C79.02,46.35 77.07,46.755 75.69,47.565 C74.31,48.375 73.62,49.53 73.62,51.03 Z"></path>
          <path d="M137.25,65.88 C125.73,65.88 119.97,60.84 119.97,50.76 L119.97,29.79 L110.34,29.79 L110.34,17.64 L119.97,17.64 L119.97,5.4 L134.55,2.25 L134.55,17.64 L147.87,17.64 L147.87,29.79 L134.55,29.79 L134.55,47.88 C134.55,49.98 135.015,51.465 135.945,52.335 C136.875,53.205 138.51,53.64 140.85,53.64 C143.01,53.64 145.2,53.31 147.42,52.65 L147.42,64.44 C146.1,64.86 144.42,65.205 142.38,65.475 C140.34,65.745 138.63,65.88 137.25,65.88 Z"></path>
          <path d="M177.57,65.88 C166.05,65.88 160.29,60.84 160.29,50.76 L160.29,29.79 L150.66,29.79 L150.66,17.64 L160.29,17.64 L160.29,5.4 L174.87,2.25 L174.87,17.64 L188.19,17.64 L188.19,29.79 L174.87,29.79 L174.87,47.88 C174.87,49.98 175.335,51.465 176.265,52.335 C177.195,53.205 178.83,53.64 181.17,53.64 C183.33,53.64 185.52,53.31 187.74,52.65 L187.74,64.44 C186.42,64.86 184.74,65.205 182.7,65.475 C180.66,65.745 178.95,65.88 177.57,65.88 Z"></path>
          <path d="M217.62,66.15 C212.76,66.15 208.365,65.055 204.435,62.865 C200.505,60.675 197.4,57.72 195.12,54 C192.84,50.28 191.7,46.11 191.7,41.49 C191.7,36.87 192.795,32.7 194.985,28.98 C197.175,25.26 200.16,22.305 203.94,20.115 C207.72,17.925 211.92,16.83 216.54,16.83 C221.22,16.83 225.36,17.955 228.96,20.205 C232.56,22.455 235.395,25.53 237.465,29.43 C239.535,33.33 240.57,37.8 240.57,42.84 L240.57,46.44 L206.64,46.44 C207.6,48.66 209.1,50.475 211.14,51.885 C213.18,53.295 215.58,54 218.34,54 C222.42,54 225.6,52.8 227.88,50.4 L237.51,58.95 C234.51,61.47 231.435,63.3 228.285,64.44 C225.135,65.58 221.58,66.15 217.62,66.15 Z M206.37,36.27 L226.26,36.27 C225.48,33.99 224.205,32.16 222.435,30.78 C220.665,29.4 218.61,28.71 216.27,28.71 C213.87,28.71 211.8,29.37 210.06,30.69 C208.32,32.01 207.09,33.87 206.37,36.27 Z"></path>
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        </g>
        <g transform="translate(0.000000, 0.000000)">
          <path
            d="M61.826087,0 L158,0 L158,96.173913 L147.695652,96.173913 C100.271201,96.173913 61.826087,57.7287992 61.826087,10.3043478 L61.826087,0 L61.826087,0 Z"
            fill="#0066CC"
          ></path>
          <path
            d="M158,3.43478261 L65.2608696,158 L138,158 C149.045695,158 158,149.045695 158,138 L158,3.43478261 L158,3.43478261 Z"
            fill="url(#linearGradient-nav-docked-expanded-example-masthead)"
          ></path>
          <path
            d="M123.652174,-30.9130435 L30.9130435,123.652174 L103.652174,123.652174 C114.697869,123.652174 123.652174,114.697869 123.652174,103.652174 L123.652174,-30.9130435 L123.652174,-30.9130435 Z"
            fill="url(#linearGradient-nav-docked-expanded-example-masthead)"
            transform="translate(77.282609, 46.369565) scale(1, -1) rotate(90.000000) translate(-77.282609, -46.369565) "
          ></path>
        </g>
      </g>
    </svg>
  );

  const dashboardBreadcrumb = (
    <Breadcrumb>
      <BreadcrumbItem>Section home</BreadcrumbItem>
      <BreadcrumbItem to="#">Section title</BreadcrumbItem>
      <BreadcrumbItem to="#">Section title</BreadcrumbItem>
      <BreadcrumbItem to="#" isActive>
        Section landing
      </BreadcrumbItem>
    </Breadcrumb>
  );

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

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

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

  const onToggleDock = () => {
    if (isMobile) {
      setIsDockExpanded(!isDockExpanded);

      if (isDockExpanded) {
        setTimeout(() => {
          mobileToggleRef.current?.focus();
        }, 200);
      }
    } else {
      setIsDockTextExpanded(!isDockTextExpanded);
    }
  };

  // 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
          />
        </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={<SearchIcon />} aria-label="Search" />
            </ToolbarItem>
          </ToolbarContent>
        </Toolbar>
      </MastheadContent>
    </Masthead>
  );

  // Docked masthead - vertical navigation sidebar
  const dockedMasthead = (
    <Masthead
      {...(isMobile && !isDockExpanded && { inert: '' })}
      display={{ default: undefined }}
      id="docked-masthead"
      variant="docked"
    >
      <MastheadMain>
        <MastheadToggle>
          <Button
            ref={dockedToggleRef}
            variant="plain"
            isHamburger
            onClick={onToggleDock}
            aria-label="Global navigation"
            isExpanded={isDockTextExpanded}
          />
        </MastheadToggle>
        <MastheadBrand>
          <MastheadLogo component={(props) => <a {...props} href="#" />} isCompact>
            <Brand src={pfIconLogo} alt="PatternFly" heights={{ default: '37px' }} />
          </MastheadLogo>
          <MastheadLogo component={(props) => <a {...props} href="#" />}>{dockTextLogo}</MastheadLogo>
        </MastheadBrand>
      </MastheadMain>
      <Divider />
      <MastheadContent>
        <Toolbar isVertical>
          <ToolbarContent>
            <ToolbarItem>
              <Nav onSelect={onNavSelect} variant="docked" aria-label="Global">
                <NavList>
                  <NavItem
                    preventDefault
                    id="nav-link1"
                    to="#nav-link1"
                    itemId={0}
                    isActive={activeItem === 0}
                    icon={<CubeIcon />}
                    anchorRef={navItem1Ref}
                    aria-label="System panel"
                  >
                    System panel
                  </NavItem>
                  <NavItem
                    preventDefault
                    id="nav-link2"
                    to="#nav-link2"
                    itemId={1}
                    isActive={activeItem === 1}
                    icon={<FolderIcon />}
                    anchorRef={navItem2Ref}
                    aria-label="Policy"
                  >
                    Policy
                  </NavItem>
                  <NavItem
                    preventDefault
                    id="nav-link3"
                    to="#nav-link3"
                    itemId={2}
                    isActive={activeItem === 2}
                    icon={<CloudIcon />}
                    anchorRef={navItem3Ref}
                    aria-label="Authentication"
                  >
                    Authentication
                  </NavItem>
                  <NavItem
                    preventDefault
                    id="nav-link4"
                    to="#nav-link4"
                    itemId={3}
                    isActive={activeItem === 3}
                    icon={<CodeIcon />}
                    anchorRef={navItem4Ref}
                    aria-label="Network services"
                  >
                    Network services
                  </NavItem>
                </NavList>
              </Nav>
              {!isDockTextExpanded && !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>
                </>
              )}
            </ToolbarItem>
            <ToolbarGroup
              variant="action-group-plain"
              align={{ default: 'alignEnd' }}
              gap={{ default: 'gapNone', md: 'gapMd' }}
            >
              <ToolbarItem>
                {isDockTextExpanded || isDockExpanded ? (
                  <MenuToggle ref={appsRef} variant="plain" icon={<ThIcon />} isDocked aria-label="Applications">
                    Applications
                  </MenuToggle>
                ) : (
                  <Tooltip aria="none" aria-live="off" triggerRef={appsRef} content="Applications">
                    <MenuToggle ref={appsRef} variant="plain" icon={<ThIcon />} isDocked aria-label="Applications">
                      Applications
                    </MenuToggle>
                  </Tooltip>
                )}
              </ToolbarItem>
              <ToolbarItem>
                {isDockTextExpanded || 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>
                {isDockTextExpanded || 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>
  );

  const mainContainerId = 'main-content-page-layout-docked-nav';

  const handleClick = (event: React.MouseEvent) => {
    event.preventDefault();

    const mainContentElement = document.getElementById(mainContainerId);
    if (mainContentElement) {
      mainContentElement.focus();
    }
  };

  const pageSkipToContent = (
    <SkipToContent onClick={handleClick} href={`#${mainContainerId}`}>
      Skip to content
    </SkipToContent>
  );

  return (
    <>
      <Page
        variant="docked"
        isDockExpanded={isDockExpanded}
        isDockTextExpanded={isDockTextExpanded}
        masthead={mobileMasthead}
        dockContent={dockedMasthead}
        skipToContent={pageSkipToContent}
        breadcrumb={dashboardBreadcrumb}
        mainContainerId={mainContainerId}
        isHorizontalSubnavWidthLimited
        isBreadcrumbWidthLimited
        isBreadcrumbGrouped
        additionalGroupedContent={
          <PageSection aria-labelledby="main-title">
            <Content>
              <h1 id="main-title">Main title</h1>
              <p>This is a full page demo.</p>
            </Content>
          </PageSection>
        }
      >
        <PageSection aria-label="Card gallery">
          <Gallery hasGutter>
            {Array.from({ length: 10 }).map((_value, index) => (
              <GalleryItem key={index}>
                <Card>
                  <CardBody>This is a card</CardBody>
                </Card>
              </GalleryItem>
            ))}
          </Gallery>
        </PageSection>
      </Page>
    </>
  );
};
