import config from './../config'
import axios from 'axios'
import { LatLng } from './common'

export interface PostTripRouteRequestOptions {
  wayPoints: LatLng[]
  specialObjectTypes: Array<string>
  mode?: string
  debug?: boolean
  context?: string
}

export interface PostTripRouteResponse {
  status: string
  errorMessage: string
  mode: string
  route: Array<PostTripRouteResponseRoute>
}

interface PostTripRouteResponseRoute {
  distance: number
  geometry: string
  special_objects: any
}

export const requestPostTripRoute = async (opt: PostTripRouteRequestOptions): Promise<PostTripRouteResponse | null> => {
  if (!config.API_KEY) {
    throw new Error('In order to call the NextBillion.ai API, you must provide a valid API Key.')
  }

  if (!config.API_HOST) {
    throw new Error('An API host is required to make request to NextBillion.ai API.')
  }

  if (!Array.isArray(opt.wayPoints) || opt.wayPoints.length === 0) {
    throw new Error('invalid wayPoints array')
  }

  const params: any = {
    key: config.API_KEY,
    waypoints: opt.wayPoints.map((point) => `${point.lat},${point.lng}`).join('|'),
    debug: opt.debug || false,
  }

  if (opt.mode) {
    params.mode = opt.mode
  }

  if (Array.isArray(opt.specialObjectTypes) && opt.specialObjectTypes.length > 0) {
    params.special_object_types = `[${opt.specialObjectTypes.join(',')}]`
  }

  if (opt.context) {
    params.context = opt.context
  }

  return await axios
    .post(`https://${config.API_HOST}/postTripRoute`, {
      ...params,
    })
    .then((resp) => resp.data as PostTripRouteResponse)
}