import { nodeOrNew, register, wrapWithAttrCheck } from '../utils/adopter.js'
import { registerMethods } from '../utils/methods.js'
import Container from './Container.js'
import baseFind from '../modules/core/selector.js'

export default class ClipPath extends Container {

  constructor ( node ) {

    super( nodeOrNew( 'clipPath', node ), node )

  }

  // Unclip all clipped elements and remove itself
  remove () {

    // unclip all targets
    this.targets().forEach( function ( el ) {

      el.unclip()

    } )

    // remove clipPath from parent
    return super.remove()

  }

  targets () {

    return baseFind( 'svg [clip-path*="' + this.id() + '"]' )

  }

}

registerMethods( {
  Container: {
    // Create clipping element
    clip: wrapWithAttrCheck( function () {

      return this.defs().put( new ClipPath() )

    } )
  },
  Element: {
    // Distribute clipPath to svg element
    clipWith ( element ) {

      // use given clip or create a new one
      let clipper = element instanceof ClipPath
        ? element
        : this.parent().clip().add( element )

      // apply mask
      return this.attr( 'clip-path', 'url("#' + clipper.id() + '")' )

    },

    // Unclip element
    unclip () {

      return this.attr( 'clip-path', null )

    },

    clipper () {

      return this.reference( 'clip-path' )

    }
  }
} )

register( ClipPath )