import {ColorVariant} from '../../../utils/utils';

export interface MainMenu {
  label: string;
  url: string;
  menuLinkId: string;
}

import {Component, Host, h, Element, Prop, State, Watch, Listen, Event, EventEmitter} from '@stencil/core';

let keys = {
  enter: 'Enter',
};

@Component({
  tag: 'hy-menu-main-group',
  styleUrl: 'hy-menu-main-group.scss',
  shadow: true,
})
export class HyMenuMainGroup {
  @Element() el: HTMLElement;
  @Prop() dataMainMenu: MainMenu[] | string;
  @Prop() isMobile: boolean = false;
  @State() isMenuOpen: boolean = false;
  @Event() universityMainMenuToggled: EventEmitter;

  private _dataMainMenu: MainMenu[];

  @Watch('dataMainMenu')
  dataMainMenuWatcher(data: MainMenu[] | string) {
    this._dataMainMenu = typeof data === 'string' ? JSON.parse(data) : data;
  }

  @Listen('click')
  handleComponentClick(event) {
    this.isMenuOpen = !this.isMenuOpen;

    if (this.isMenuOpen) {
      this.emitEvent();
      this.adjustMainMenuPosition(event.target);
    }

    event.stopPropagation();
  }

  @Listen('keydown')
  handleComponentKeyDown(event: KeyboardEvent) {
    const key = event.code;
    let target = event.target as HTMLButtonElement;

    if (target && [keys.enter].includes(key)) {
      this.isMenuOpen = !this.isMenuOpen;

      if (this.isMenuOpen) {
        this.emitEvent();
        this.adjustMainMenuPosition(target);

        event.preventDefault();
      }
    }
  }

  emitEvent() {
    // Close other panels if they are open (lang menu, search, main menu, ..).
    this.universityMainMenuToggled.emit();
  }

  adjustMainMenuPosition(target) {
    let hyTopHeader = this.el.closest('.hy-site-header__content-top') as HTMLElement;

    if (hyTopHeader && hyTopHeader.hasAttribute('is-mobile')) {
      console.log('do mobile stuff');
    } else {
      let mainMenuToggle = target.shadowRoot.querySelector('.menu--main-group__toggle') as HTMLElement;
      let mainMenuDropdown = target.shadowRoot.querySelector('.menu--main-group__dropdown') as HTMLElement;
      let mainMenuList = target.shadowRoot.querySelector('.list') as HTMLElement;
      if (mainMenuDropdown && mainMenuList && mainMenuToggle) {
        let rectHeader = hyTopHeader.getBoundingClientRect();
        let rectMenuToggle = mainMenuToggle.getBoundingClientRect();
        mainMenuDropdown.style.top = `${rectHeader.height}px`;

        mainMenuList.style.left = `${rectMenuToggle.left}px`;
      }
    }
  }

  componentWillRender() {
    this.dataMainMenuWatcher(this.dataMainMenu);
  }

  handleMainMenuClose(event) {
    this.isMenuOpen = false;
    event.stopPropagation();
  }

  // Close the University main menu if user clicks anywhere outside the component.
  @Listen('click', {target: 'window'})
  handleOutsideMenuClick(event) {
    this.isMenuOpen = false;
    event.stopPropagation();
  }

  // CLose the University main menu if user opens the desktop menu panel.
  @Listen('menuDesktopToggled', {target: 'document'})
  desktopMenuToggled() {
    this.isMenuOpen = false;
  }

  // CLose the University main menu if user opens the search panel
  @Listen('searchPanelToggled', {target: 'document'})
  searchPanelToggled() {
    this.isMenuOpen = false;
  }

  // CLose the University main menu if user opens the language menu panel.
  @Listen('menuLanguageToggled', {target: 'document'})
  languageMenuToggled() {
    this.isMenuOpen = false;
  }

  render() {
    const white = 'var(--grayscale-white)';

    return this.isMobile ? (
      <Host
        class={{
          'menu--main-group--mobile': true,
          'menu--main-group--mobile__is-open': this.isMenuOpen,
        }}
      >
        <button
          class={{
            'menu--main-group__mobile-toggle': true,
            'is-open': this.isMenuOpen,
          }}
        >
          <hy-icon icon={'hy-icon-slim-hamburger-menu'} size={20} fill={white} />
        </button>
        <nav
          role="navigation"
          class={{
            'menu--main-group__dropdown--mobile': true,
            'is-open': this.isMenuOpen,
          }}
        >
          <div class="list">
            {this._dataMainMenu.map((item) => {
              return (
                <a href={item.url} class={{'menu-main-link': true}}>
                  <span class="heading-icon">
                    <hy-icon icon={'hy-icon-caret-right'} size={10} fill={white} />
                  </span>
                  <span class={'menu--main-group__label'}>{item.label}</span>
                </a>
              );
            })}
          </div>
        </nav>
      </Host>
    ) : (
      <Host
        class={{
          'menu--main-group': true,
          'menu--main-group__is-open': this.isMenuOpen,
        }}
      >
        <button
          class={{
            'menu--main-group__toggle': true,
            'is-open': this.isMenuOpen,
          }}
          //aria-label={this.isMenuOpen ? this._labels['close'] : this._labels['open']}
        >
          {this.isMenuOpen ? (
            <hy-icon class={'toggle__close'} icon={'hy-icon-remove'} size={8} fill={white} />
          ) : (
            <hy-icon class={'toggle__caret'} icon={'hy-icon-slim-hamburger-menu'} size={8} fill={white} />
          )}
          <span>University main menu</span>
        </button>
        <div
          class={{
            'menu--main-group__dropdown': true,
            'is-open': this.isMenuOpen,
          }}
        >
          <div class="list">
            {this._dataMainMenu.map((item) => {
              return (
                <a href={item.url} class={{'menu-main-link': true}}>
                  <span class="heading-icon">
                    <hy-icon icon={'hy-icon-caret-right'} size={10} fill={white} />
                  </span>
                  <span class={'menu--main-group__label'}>{item.label}</span>
                </a>
              );
            })}
          </div>
          <button
            onClick={(e) => this.handleMainMenuClose(e)}
            class={{
              'panel-toggle': true,
            }}
            aria-label="Close menu"
          >
            <span class="panel-toggle__label">
              <span class="panel-toggle__label__title">Close</span>
              <hy-icon icon={'hy-icon-remove'} size={20} fill={ColorVariant.white} />
            </span>
          </button>
        </div>
      </Host>
    );
  }
}