const { LitElement, html, css } = require('lit-element')
const invsprite = require('./invsprite.json')

class HotBar extends LitElement {
  updated (changedProperties) {
    if (changedProperties.has('bot')) {
    // inventory listener
      this.bot.on('spawn', () => {
        this.init()
      })
    }
  }

  init () {
    this.reloadHotbar()
    this.reloadHotbarSelected(0)
    document.addEventListener('wheel', (e) => {
      const newSlot = ((this.bot.quickBarSlot + Math.sign(e.deltaY)) % 9 + 9) % 9
      this.reloadHotbarSelected(newSlot)
    })

    this.bot.inventory.on('updateSlot', (slot, oldItem, newItem) => {
      if (slot >= this.bot.inventory.hotbarStart + 9) return
      if (slot < this.bot.inventory.hotbarStart) return

      const sprite = newItem ? invsprite[newItem.name] : invsprite.air
      const slotImage = this.shadowRoot.getElementById('hotbar-' + (slot - this.bot.inventory.hotbarStart))
      slotImage.style['background-position-x'] = `-${sprite.x * 2}px`
      slotImage.style['background-position-y'] = `-${sprite.y * 2}px`
      slotImage.innerHTML = newItem?.count > 1 ? newItem.count : ''
    })
  }

  async reloadHotbar () {
    for (let i = 0; i < 9; i++) {
      const item = this.bot.inventory.slots[this.bot.inventory.hotbarStart + i]
      const sprite = item ? invsprite[item.name] : invsprite.air
      const slotImage = this.shadowRoot.getElementById('hotbar-' + i)
      slotImage.style['background-position-x'] = `-${sprite.x * 2}px`
      slotImage.style['background-position-y'] = `-${sprite.y * 2}px`
      slotImage.innerHTML = item?.count > 1 ? item.count : ''
    }
  }

  async reloadHotbarSelected (slot) {
    const planned = (20 * 4 * slot) + 'px'
    this.shadowRoot.getElementById('hotbar-highlight').style.marginLeft = planned
    this.bot.setQuickBarSlot(slot)
  }

  static get properties () {
    return {
      bot: { type: Object },
      viewerVersion: { type: String }
    }
  }

  static get styles () {
    return css`
    #hotbar-wrapper {
      image-rendering: optimizeSpeed;
      image-rendering: -moz-crisp-edges;
      image-rendering: -webkit-optimize-contrast;
      image-rendering: -o-crisp-edges;
      image-rendering: pixelated;
      -ms-interpolation-mode: nearest-neighbor;
    }

    #hotbar-image {
      position: absolute;
      top: 100%;
      left: 50%;
      height: calc(256px * 4);
      width: calc(256px * 4);
      transform: translate(calc(-182px * 2), calc(-22px * 4));
      clip-path: inset(0px calc(74px * 4) calc(234px * 4) 0px);
    }

    #hotbar-items-wrapper {
      position: absolute;
      top: 100%;
      left: 50%;
      height: calc(256px * 4);
      width: calc(256px * 4);
      transform: translate(calc(-182px * 2), calc(-22px * 4));
      clip-path: inset(0px calc(74px * 4) calc(234px * 4) 0px);
    }

    #hotbar-highlight {
      position: absolute;
      top: 100%;
      left: 50%;
      height: calc(256px * 4);
      width: calc(256px * 4);
      margin-left: calc(20px * 4 * 4); /* EDIT THIS TO CHANGE WHICH SLOT IS SELECTED */
      transform: translate(calc((-24px * 2) - (20px * 4 * 4) ), calc((-22px * 4) + (-24px * 4) + 4px)); /* first need to translate up to account for clipping, then account for size of image, then 1px to center vertically over the image*/
      clip-path: inset(calc(22px * 4) calc(232px * 4) calc(210px * 4) 0px);
    }

    .hotbar-item {
      display: inline-block;
      height: 32px;
      width: 64px;
      margin-top: 12px;
      margin-left: 12px;
      margin-right: 4.25px;
      background-image: url('invsprite.png');
      background-size: 2048px auto;
      text-align: right;
      font-size: 32px;
      vertical-align: top;
      padding-top: 32px;
      color: #ffffff;
      text-shadow: 2px 2px 0px #3f3f3f;
      font-family: mojangles, minecraft, monospace;
    }
    `
  }

  render () {
    return html`
    <div id="hotbar-wrapper">
      <img id="hotbar-image" src="textures/1.16.4/gui/widgets.png">
      <img id="hotbar-highlight" src="textures/1.16.4/gui/widgets.png">
      <div id="hotbar-items-wrapper">
        <div class="hotbar-item" id="hotbar-0"></div
        ><div class="hotbar-item" id="hotbar-1"></div
        ><div class="hotbar-item" id="hotbar-2"></div
        ><div class="hotbar-item" id="hotbar-3"></div
        ><div class="hotbar-item" id="hotbar-4"></div
        ><div class="hotbar-item" id="hotbar-5"></div
        ><div class="hotbar-item" id="hotbar-6"></div
        ><div class="hotbar-item" id="hotbar-7"></div
        ><div class="hotbar-item" id="hotbar-8"></div>
      </div>
    </div>
    `
  }
}

window.customElements.define('hot-bar', HotBar)