import { cuttingString } from './util'

function average(aver, curr, index) {
  aver[0] += curr[0]
  aver[1] += curr[1]
  if (index) {
    aver[0] /= 2
    aver[1] /= 2
  }
  return aver
}


function grentText(features) {
  let texts = []

  features.forEach(fe => {
    if (fe.properties.name) {
      let averagePoint = fe.geometry.coordinates.reduce((tPoint, geometry, index) => {
        return average(
          tPoint,
          geometry.reduce(average, [0, 0]),
          index
        )
      }, [0, 0])
      let name = cuttingString(fe.properties.name, 15)
      texts.push({
        name: name.join('\n'),
        point: averagePoint,
        height: fe.height + 3 * name.length + 5 
      })
    }
  })

  return texts
}

export default grentText