import React from 'react';
import {browserHistory, RouteComponentProps} from 'react-router';
import styled from '@emotion/styled';

import Button from 'app/components/button';
import {IconClose, IconMenu} from 'app/icons';
import {t} from 'app/locale';
import {fadeIn, slideInLeft} from 'app/styles/animations';
import space from 'app/styles/space';

import SettingsBreadcrumb from './settingsBreadcrumb';
import SettingsHeader from './settingsHeader';
import SettingsSearch from './settingsSearch';

type Props = {
  renderNavigation?: () => React.ReactNode;
  children: React.ReactNode;
} & RouteComponentProps<{}, {}>;

type State = {
  /**
   * This is used when the screen is small enough that the navigation should
   * be hidden. On large screens this state will end up unused.
   */
  navVisible: boolean;
  /**
   * Offset mobile settings navigation by the height of main navigation,
   * settings breadcrumbs and optional warnings.
   */
  navOffsetTop: number;
};

class SettingsLayout extends React.Component<Props, State> {
  state: State = {
    navVisible: false,
    navOffsetTop: 0,
  };

  componentDidMount() {
    // Close the navigation when navigating.
    this.unlisten = browserHistory.listen(() => this.toggleNav(false));
  }

  componentWillUnmount() {
    this.unlisten();
  }

  unlisten!: () => void;
  headerRef = React.createRef<HTMLDivElement>();

  toggleNav(navVisible: boolean) {
    // when the navigation is opened, body should be scroll-locked
    this.toggleBodyScrollLock(navVisible);

    this.setState({
      navOffsetTop: this.headerRef.current?.getBoundingClientRect().bottom ?? 0,
      navVisible,
    });
  }

  toggleBodyScrollLock(lock: boolean) {
    const bodyElement = document.getElementsByTagName('body')[0];

    if (window.scrollTo) {
      window.scrollTo(0, 0);
    }
    bodyElement.classList[lock ? 'add' : 'remove']('scroll-lock');
  }

  render() {
    const {params, routes, route, renderNavigation, children} = this.props;
    const {navVisible, navOffsetTop} = this.state;

    // We want child's view's props
    const childProps =
      children && React.isValidElement(children) ? children.props : this.props;
    const childRoutes = childProps.routes || routes || [];
    const childRoute = childProps.route || route || {};
    const shouldRenderNavigation = typeof renderNavigation === 'function';

    return (
      <SettingsColumn>
        <SettingsHeader ref={this.headerRef}>
          <HeaderContent>
            {shouldRenderNavigation && (
              <NavMenuToggle
                priority="link"
                label={t('Open the menu')}
                icon={navVisible ? <IconClose aria-hidden /> : <IconMenu aria-hidden />}
                onClick={() => this.toggleNav(!navVisible)}
              />
            )}
            <StyledSettingsBreadcrumb
              params={params}
              routes={childRoutes}
              route={childRoute}
            />
            <SettingsSearch />
          </HeaderContent>
        </SettingsHeader>

        <MaxWidthContainer>
          {shouldRenderNavigation && (
            <SidebarWrapper isVisible={navVisible} offsetTop={navOffsetTop}>
              {renderNavigation!()}
            </SidebarWrapper>
          )}
          <NavMask isVisible={navVisible} onClick={() => this.toggleNav(false)} />
          <Content>{children}</Content>
        </MaxWidthContainer>
      </SettingsColumn>
    );
  }
}

const SettingsColumn = styled('div')`
  display: flex;
  flex-direction: column;
  flex: 1; /* so this stretches vertically so that footer is fixed at bottom */
  min-width: 0; /* fixes problem when child content stretches beyond layout width */
  footer {
    margin-top: 0;
  }
`;

const HeaderContent = styled('div')`
  display: flex;
  align-items: center;
  justify-content: space-between;
`;

const NavMenuToggle = styled(Button)`
  display: none;
  margin: -${space(1)} ${space(1)} -${space(1)} -${space(1)};
  padding: ${space(1)};
  color: ${p => p.theme.subText};
  &:hover,
  &:focus,
  &:active {
    color: ${p => p.theme.textColor};
  }
  @media (max-width: ${p => p.theme.breakpoints[0]}) {
    display: block;
  }
`;

const StyledSettingsBreadcrumb = styled(SettingsBreadcrumb)`
  flex: 1;
`;

const MaxWidthContainer = styled('div')`
  display: flex;
  max-width: ${p => p.theme.settings.containerWidth};
  flex: 1;
`;

const SidebarWrapper = styled('div')<{isVisible: boolean; offsetTop: number}>`
  flex-shrink: 0;
  width: ${p => p.theme.settings.sidebarWidth};
  background: ${p => p.theme.background};
  border-right: 1px solid ${p => p.theme.border};

  @media (max-width: ${p => p.theme.breakpoints[0]}) {
    display: ${p => (p.isVisible ? 'block' : 'none')};
    position: fixed;
    top: ${p => p.offsetTop}px;
    bottom: 0;
    overflow-y: auto;
    animation: ${slideInLeft} 100ms ease-in-out;
    z-index: ${p => p.theme.zIndex.settingsSidebarNav};
    box-shadow: ${p => p.theme.dropShadowHeavy};
  }
`;

const NavMask = styled('div')<{isVisible: boolean}>`
  display: none;
  @media (max-width: ${p => p.theme.breakpoints[0]}) {
    display: ${p => (p.isVisible ? 'block' : 'none')};
    background: rgba(0, 0, 0, 0.35);
    height: 100%;
    width: 100%;
    position: absolute;
    z-index: ${p => p.theme.zIndex.settingsSidebarNavMask};
    animation: ${fadeIn} 250ms ease-in-out;
  }
`;

/**
 * Note: `overflow: hidden` will cause some buttons in `SettingsPageHeader` to be cut off because it has negative margin.
 * Will also cut off tooltips.
 */
const Content = styled('div')`
  flex: 1;
  padding: ${space(4)};
  min-width: 0; /* keep children from stretching container */
`;

export default SettingsLayout;