import ILocation from '@/models/ILocation'
import ILocationQuery from '@/models/ILocationQuery'

class MapService {
  private key: string = import.meta.env.VITE_MAP_KEY || ''

  public async getPosition(): Promise<ILocation | null> {
    const position = await this.getCurrentPosition()
    if (!position) {
      return null
    }
    const { coords } = position
    const location = {
      lat: coords.latitude,
      lon: coords.longitude
    }
    const place = await this.getPlace(location)

    return {
      ...location,
      place
    }
  }

  public async getPlace(location: ILocation): Promise<string> {
    const result = await fetch(this.url(location.lat, location.lon))
    if (!result) {
      return ''
    }
    const json: ILocationQuery = await result.json()
    if (
      !json ||
      !json.resourceSets ||
      !json.resourceSets.length ||
      !json.resourceSets[0].resources.length
    ) {
      return ''
    }
    const address = json.resourceSets[0].resources[0].address
    return address ? address.locality : ''
  }

  private url(latitude: number, longitude: number) {
    return `https://dev.virtualearth.net/REST/v1/Locations/${latitude},${longitude}?key=${this.key}`
  }

  private getCurrentPosition(): Promise<GeolocationPosition | null> {
    return new Promise((resolve, reject) => {
      if (!('geolocation' in navigator)) {
        resolve(null)
        return
      }
      navigator.geolocation.getCurrentPosition(resolve, reject)
    })
  }
}

export default new MapService()