import Sign, {StyleProps as SignProps} from '../label/sign'
import {AttachCAD as CAD} from '../index'
import {Point as geoPoint} from '../geometry'
import {type} from '../util'


export interface sign{
  setSign: (point: geoPoint, dire?: number) => void,
  hideSign: () => Promise<void>,
  showSign: () => Promise<void>,
  setDefaultSignStyle: (args: SignProps) => void
}

// 附加显示隐藏比例尺的api，添加当前位置的label
export const attachSign = (cad: CAD) => {
  let signStyle = {
    border: 2,
    r: 5
  }
  
  const addProcessing = cad.addProcessing
  cad.addProcessing = (...args) => {
    let processing = addProcessing.call(cad, ...args)
    
    Sign.Setting.set(processing.render, signStyle)

    let sign = new Sign({
      pos: {x: 0, y: 0},
      dire: 0,
      renderer: processing.render
    })
    sign.zIndex = 1
    processing.render.push(sign)
    
    processing.sign = sign
    return processing
  }

  // 添加设置当前点位方向
  cad.setSign = (point, dire) => {
    let sign = cad.processing.sign
    if (type.isNumber(dire)) sign.dire = dire
    sign.pos = point
  }

  cad.hideSign = () => {
    let sign = cad.processing.sign
    sign.show = false
    return new Promise(r => sign.nextTick(r))
  }

  cad.showSign = () => {
    let sign = cad.processing.sign
    sign.show = true
    return new Promise(r => sign.nextTick(r))
  }
  
  cad.setDefaultSignStyle = args => {
    let sign = cad.processing.sign
    if (args.border) {
      signStyle.border = args.border
      sign.border = args.border
    }
    if (args.r) {
      signStyle.r = args.r
      sign.r = args.r
    }
    if (args.color) {
      sign.color = args.color
    }
  }
}