import {z} from 'zod'

export type GetApiConfigRoadNetworkOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const roadNetworkSegment = z.object({id: z.string().max(10000), direction: z.enum(["N", "S", "W", "E"]), start: z.object({lat: z.number(), lng: z.number()}), end: z.object({lat: z.number().gte(-90).lte(90), lng: z.number().gte(-180).lte(180)}), points: z.array(z.object({lat: z.number().gte(-90).lte(90), lng: z.number().gte(-180).lte(180), alt: z.number().gte(0).lte(100000)}))});

export const roadNetwork = z.object({city: z.string().max(10000), docType: z.literal("roadNetwork"), intersections: z.array(z.object({name: z.string().max(10000), segments: z.array(roadNetworkSegment)}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get road-network configuration
 * 
 * GET /config/road-network
 */
export const getApiConfigRoadNetwork = async (options?: GetApiConfigRoadNetworkOptions) => {
const {baseUrl = "https://ai.nvidia.com/api/v3.3/analytics", fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

const url = `${baseUrl.replace(/\/+$/, '')}/config/road-network${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(roadNetwork, await res.json())
};