export class FileView extends HTMLElement {
  icons = {
    menu: `
      <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" class="bi bi-three-dots" viewBox="0 0 16 16">
        <path d="M3 9.5a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3z"/>
      </svg>
    `,
    down: `
      <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-caret-down-fill" viewBox="0 0 16 16">
        <path d="M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z"/>
      </svg>
    `,
    up: `
      <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-caret-up-fill" viewBox="0 0 16 16">
        <path d="m7.247 4.86-4.796 5.481c-.566.647-.106 1.659.753 1.659h9.592a1 1 0 0 0 .753-1.659l-4.796-5.48a1 1 0 0 0-1.506 0z"/>
      </svg>
    `,
  }

  textEn = {
    addAbove: 'Add above',
    addBelow: 'Add below',
    delete: 'Delete',
  }

  textEs = {
    addAbove: 'Añadir arriba',
    addBelow: 'Añadir abajo',
    delete: 'Borrar',
  }

  constructor() {
    super()
    this.language = navigator.language
    this.attachShadow({mode: 'open'})
    this.headerEl = document.createElement('div')
    this.headerEl.classList.add('header')
    this.contentEl = document.createElement('div')
    this.contentEl.classList.add('content')
    this.shadowRoot.appendChild(this.headerEl)
    this.shadowRoot.appendChild(this.contentEl)
    this.nameEl = document.createElement('input')
    this.nameEl.classList.add('name')
    this.nameEl.setAttribute('spellcheck', 'false')
    this.nameEl.addEventListener('input', e => {
      this.setFileType(e.target.value)
    })
    this.headerEl.appendChild(this.nameEl)
    this.collapseBtn = document.createElement(
      'button'
    )
    this.collapseBtn.innerHTML = this.icons.up
    this.collapseBtn.addEventListener('click', () => {
      this.collapsed = !this.collapsed
    })
    this.headerEl.appendChild(this.collapseBtn)
    this.menuBtn = document.createElement('button')
    this.menuBtn.innerHTML = this.icons.menu
    this.menuBtn.addEventListener('click', () => {
      this.openMenu()
    })
    this.headerEl.appendChild(this.menuBtn)
    this.menu = document.createElement(
      'm-menu-dropdown'
    )
    this.shadowRoot.appendChild(this.menu)
  }

  connectedCallback() {
    const style = document.createElement('style')
    style.textContent = `
      :host {
        display: flex;
        flex-direction: column;
        align-items: stretch;
      }
      div.header {
        display: flex;
        flex-direction: row;
        align-items: stretch;
        background-color: #f2dbd8;
        color: #000;
        padding: 3px 0;
      }
      div.header > * {
        background: inherit;
        color: inherit;
        border: none;
      }
      .name {
        flex-grow: 1;
        padding: 0 5px;
        font: inherit;
        font-family: monospace;
        outline: none;
      }
      div.header button svg {
        margin-bottom: -3px;
      }
      div.content {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        min-height: 5px;
      }
      div.content.collapsed > * {
        display: none;
      }
      svg {
        height: 20px;
        width: 20px;
      }
    `
    this.shadowRoot.appendChild(style)
  }

  openMenu() {
    this.menu.clear()
    this.menu.add(this.text.addAbove, () => {
      this.dispatchEvent(new CustomEvent(
        'click-add-above', {bubbles: true}
      ))
    })
    this.menu.add(this.text.addBelow, () => {
      this.dispatchEvent(new CustomEvent(
        'click-add-below', {bubbles: true}
      ))
    })
    if (this.fileCount.value > 1) {
      this.menu.add(this.text.delete, () => {
        this.remove()
        this.fileCount.value -= 1
      })
    }
    this.menu.open(this.menuBtn)
  }

  set codeMirror(value) {
    this._codeMirror = value
    const tagName = (
      this.codeMirror ?
      'm-editor-code-edit' : 'm-editor-text-edit'
    )
    this.editEl = document.createElement(tagName)
    this.contentEl.replaceChildren(this.editEl)
  }

  get codeMirror() {
    return this._codeMirror
  }

  set name(name) {
    this.nameEl.value = name
    this.setFileType(name)
  }

  get name() {
    return this.nameEl.value
  }

  set data(data) {
    this.editEl.value = data
  }

  get data() {
    return this.editEl.value
  }

  set collapsed(value) {
    const cl = this.contentEl.classList
    if (value) {
      cl.add('collapsed')
    } else {
      cl.remove('collapsed')
    }
    this.collapseBtn.innerHTML = (
      value ?
      this.icons.down : this.icons.up
    )
  }

  get collapsed() {
    return this.contentEl.classList.contains(
      'collapsed'
    )
  }

  setFileType(value) {
    if (this.codeMirror && this.editEl) {
      let fileType
      if (value.endsWith('.js')) {
        fileType = 'js'
      } else if (value.endsWith('.html')) {
        fileType = 'html'
      } else if (value.endsWith('.css')) {
        fileType = 'css'
      } else if (value.endsWith('.json')) {
        fileType = 'json'
      }
      this.editEl.fileType = fileType
    }
  }

  get language() {
    return this._language
  }

  set language(language) {
    this._language = language
    this.text = this.langEs ? this.textEs : this.textEn
  }

  get langEs() {
    return /^es\b/.test(this.language)
  }
}