import { Node, mergeAttributes } from '@tiptap/core'
import { Plugin } from '@tiptap/pm/state'

declare module '@tiptap/core' {
  interface Commands<ReturnType> {
    Figure: {
      setFigureFloat: (float: null | 'left' | 'right') => ReturnType
    }
  }
}
export const Figure = Node.create({
  name: 'figure',
  addOptions() {
    return {
      HTMLAttributes: {}
    }
  },
  group: 'block',
  content: '(image | iframe) figcaption',
  draggable: true,
  isolating: true,
  atom: true,

  addAttributes() {
    return {
      'data-float': null,
      'data-type': { default: null }
    }
  },
  // @ts-ignore FIXME: why
  parseHTML() {
    return [
      {
        tag: 'figure',
        getAttrs: (node) => {
          if (!(node instanceof HTMLElement)) {
            return
          }
          const img = node.querySelector('img')
          const iframe = node.querySelector('iframe')
          let dataType = null
          if (img) {
            dataType = 'image'
          } else if (iframe) {
            dataType = 'iframe'
          }
          return { 'data-type': dataType }
        }
      }
    ]
  },
  renderHTML({ HTMLAttributes }) {
    return ['figure', mergeAttributes(HTMLAttributes, { 'data-type': this.name }), 0]
  },

  addProseMirrorPlugins() {
    return [
      new Plugin({
        props: {
          handleDOMEvents: {
            // prevent dragging nodes out of the figure
            dragstart: (view, event) => {
              if (!event.target) {
                return false
              }
              const pos = view.posAtDOM(event.target as HTMLElement, 0)
              const $pos = view.state.doc.resolve(pos)
              if ($pos.parent.type === this.type) {
                event.preventDefault()
              }
              return false
            }
          }
        }
      })
    ]
  },

  addCommands() {
    return {
      setFigureFloat:
        (value) =>
        ({ commands }) => {
          return commands.updateAttributes(this.name, { 'data-float': value })
        }
    }
  }
})