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import { Component } from '../component.ts'import { h, render, strToHash, tick } from '../core.ts'import { rippleEffect, userSelect } from './_config.ts'import { addStylesToHead } from './_helpers.ts'
interface TabsProps {  onClick?: any  active?: number  scroll?: boolean  children?: any[]}
export const Tab = (props: any) => {  const classes = [props.itemClass, props.rippleClass]  if (props.active) classes.push('active')
  const link = props.href ? { href: props.href } : {}
  const a = h('a', { ...link }, props.children)  return h('li', { class: classes.join(' '), onClick: () => props.onClickHandler({ index: props.index }) }, a)}
export class Tabs extends Component<TabsProps> {  line: HTMLElement  items: HTMLElement[]  active = this.props.active || 0
  didMount() {    const adjustLine = (item: HTMLElement) => {      if (!item) return      const first = this.items[0].getBoundingClientRect()      const active = item.getBoundingClientRect()
      this.line.style.left = `${active.x - first.x}px`      this.line.style.width = `${active.width}px`
      // disable old      document.querySelector('.tabs_item.active')?.classList.remove('active')
      // enable new      item.classList.add('active')    }
    const scrollIntoView = (item: HTMLElement) => {      if (!this.props.scroll) return
      item.scrollIntoView({        behavior: 'smooth',        block: 'center',        inline: 'center'      })    }
    // @ts-ignore    tick(() => {      adjustLine(this.items[this.active])      scrollIntoView(this.items[this.active])    })
    for (let i = 0; i < this.items.length; i++) {      const item = this.items[i]
      item.addEventListener('click', () => {        this.active = i
        // looks hacky, but works well :)        setTimeout(() => adjustLine(item), 50)        setTimeout(() => adjustLine(item), 100)        setTimeout(() => adjustLine(item), 150)
        // does not work in safari        scrollIntoView(item)      })    }  }
  render() {    const ripple = rippleEffect('#ffffff70', '#5902db')
    const { scroll = false, children, active } = this.props    const cssHash = strToHash(scroll.toString() + children?.length + active + ripple.class)
    const styles = `      .tabs_container-${cssHash} {        background: #6204ee;
        width: 100%;        height: 48px;
        overflow-x: ${this.props.scroll ? 'scroll' : 'hidden'};        overflow-y: hidden;
        ${userSelect}      }
      /* Hide scrollbar for Chrome, Safari and Opera */      .tabs_container-${cssHash}::-webkit-scrollbar {        display: none;      }
      /* Hide scrollbar for IE, Edge and Firefox */      .tabs_container-${cssHash} {        -ms-overflow-style: none; /* IE and Edge */        scrollbar-width: none; /* Firefox */      }
      .tabs_list-${cssHash} {        ${!this.props.scroll ? 'display: flex; justify-content: space-evenly;' : ''}
        height: 100%;        display: flex;        list-style-type: none;        margin: 0;        padding: 0;        cursor: pointer;      }
      .tabs_item-${cssHash} {        ${!this.props.scroll ? 'width: 100%; text-align: center;' : ''}
        padding-top: 16px;        font-size: 14px;        text-transform: uppercase;        color: rgba(255, 255, 255, 0.75);        transition: color 0.2s;      }                  .tabs_item-${cssHash} a {        font-size: 14px;        padding: 16px 32px;        text-decoration: none;        text-transform: uppercase;        color: rgba(255, 255, 255, 0.75);        transition: color 0.2s;      }
      .tabs_item-${cssHash}.active a {        color: rgba(255, 255, 255, 1);      }
      .tabs_item-${cssHash}:active {        background: #5902db;      }
      /* if the primary input mechanism system of the device can hover over elements with ease, we use hover */      @media (hover: hover) {        .tabs_item-${cssHash}:hover {          background: #5902db;        }      }
      ${ripple.styles}
      .tabs_line-${cssHash} {        border-bottom: 2px solid white;        position: relative;        top: -2px;
        opacity: 0;                left: 50%;        width: 0px;
        transition: left 0.5s, width 0.5s;
        animation-name: tabs_line_fadein;        animation-duration: 0.25s;        animation-delay: 0.25s;        animation-fill-mode: forwards;      }            @keyframes tabs_line_fadein {        from {opacity: 0;}        to {opacity: 1;}      }      `
    addStylesToHead(styles, cssHash)
    // set the active tab    this.props.children?.forEach((c, i) => {      // is active      if (i === this.active) c.props = { ...c.props, active: true }      // add ripple class      c.props = { ...c.props, rippleClass: ripple.class, itemClass: `tabs_item-${cssHash}`, index: i }      // add click events      c.props.onClickHandler = (event: any) => this.props.onClick(event)    })
    this.items = render(this.props.children)
    const list = h('ul', { class: `tabs_list-${cssHash}` }, this.items)    this.line = h('div', { class: `tabs_line-${cssHash}` })    const container = h('div', { class: `tabs_container-${cssHash}` }, list, this.line)
    return container  }}