import {
  MapGeographicPosition,
} from '/@/types/map'

export type GeojsonCoordinate = [number, number, number?]

export interface GeojsonLine {
 type: 'Feature'
 properties: {
   color: string
   directConnected?: boolean
 }
 geometry: {
   type: 'LineString'
   coordinates: GeojsonCoordinate[]
 }
}

export interface GeojsonPolygon {
 type: 'Feature'
 properties: {
   color: string
 }
 geometry: {
   type: 'Polygon'
   coordinates: GeojsonCoordinate[][]
 }
}

export interface GeojsonPoint {
 type: 'Feature'
 properties: {
   color: string
   clampToGround?: boolean
 }
 geometry: {
   type: 'Point'
   coordinates: GeojsonCoordinate
 }
}

export type GeojsonFeature = GeojsonLine | GeojsonPolygon | GeojsonPoint

export function geographic2Coordinate (position: MapGeographicPosition): GeojsonCoordinate {
  const coordinates: GeojsonCoordinate = [position.longitude, position.latitude]
  if (position.height !== undefined) coordinates.push(position.height)
  return coordinates
}

export function generateLine (coordinates: MapGeographicPosition[], properties: GeojsonLine['properties']): GeojsonFeature {
  return {
    type: 'Feature',
    properties,
    geometry: {
      type: 'LineString',
      coordinates: coordinates.map(geographic2Coordinate),
    },
  }
}

export function generatePolygon (coordinates: MapGeographicPosition[], properties: GeojsonPolygon['properties']): GeojsonFeature {
  return {
    type: 'Feature',
    properties,
    geometry: {
      type: 'Polygon',
      coordinates: [coordinates.map(geographic2Coordinate)],
    },
  }
}

export function generatePoint (position: MapGeographicPosition, properties: GeojsonPoint['properties']): GeojsonFeature {
  return {
    type: 'Feature',
    properties,
    geometry: {
      type: 'Point',
      coordinates: geographic2Coordinate(position),
    },
  }
}