import {z} from 'zod'

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

export const jsonLdContext = z.union([z.array(z.unknown()), z.object({})]);

export const geoJsonCoordinate = z.array(z.number());

export const geoJsonBoundingBox = z.array(z.number());

export const geoJsonLineString = z.array(geoJsonCoordinate);

export const geoJsonPolygon = z.array(z.array(geoJsonCoordinate));

export const geoJsonGeometry = z.union([z.object({type: z.literal("Point"), coordinates: geoJsonCoordinate, bbox: geoJsonBoundingBox.optional()}), z.object({type: z.literal("LineString"), coordinates: geoJsonLineString, bbox: geoJsonBoundingBox.optional()}), z.object({type: z.literal("Polygon"), coordinates: geoJsonPolygon, bbox: geoJsonBoundingBox.optional()}), z.object({type: z.literal("MultiPoint"), coordinates: z.array(geoJsonCoordinate), bbox: geoJsonBoundingBox.optional()}), z.object({type: z.literal("MultiLineString"), coordinates: z.array(geoJsonLineString), bbox: geoJsonBoundingBox.optional()}), z.object({type: z.literal("MultiPolygon"), coordinates: z.array(geoJsonPolygon), bbox: geoJsonBoundingBox.optional()})]).nullable();

export const geometryString = z.string().nullable();

export const unitOfMeasure = z.string();

export const quantitativeValue = z.object({value: z.number().nullable().optional(), maxValue: z.number().optional(), minValue: z.number().optional(), unitCode: unitOfMeasure.optional(), qualityControl: z.enum(["Z", "C", "S", "V", "X", "Q", "G", "B", "T"]).optional()});

export const paginationInfo = z.object({next: z.string()});

export const observationStationCollectionGeoJson = z.object({"@context": jsonLdContext.optional(), type: z.literal("FeatureCollection"), features: z.array(z.object({"@context": jsonLdContext.optional(), id: z.string().optional(), type: z.literal("Feature"), geometry: geoJsonGeometry, properties: z.object({"@context": jsonLdContext.optional(), geometry: geometryString.optional(), "@id": z.string().optional(), "@type": z.literal("wx:ObservationStation").optional(), elevation: quantitativeValue.optional(), stationIdentifier: z.string().optional(), name: z.string().optional(), timeZone: z.string().optional(), provider: z.string().optional(), subProvider: z.string().optional(), forecast: z.string().optional(), county: z.string().optional(), fireWeatherZone: z.string().optional(), distance: quantitativeValue.optional(), bearing: quantitativeValue.optional()})})), observationStations: z.array(z.string()).optional(), pagination: paginationInfo.optional()});

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
};

/**
 * Returns a list of observation stations for a given zone
 * 
 * GET /zones/forecast/{zoneId}/stations
 * 
 * Also accepts auth: apiKeyAuth
 */
export const getApiZonesForecastZoneIdStations = async (options?: GetApiZonesForecastZoneIdStationsOptions) => {
const {baseUrl = "https://api.weather.gov", fetch: fetchFn = fetch, userAgent} = options ?? {}

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

if (userAgent !== undefined) headers.set("User-Agent", userAgent)

const url = `${baseUrl.replace(/\/+$/, '')}/zones/forecast/${encodeURIComponent(String(args.zoneId))}/stations${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(observationStationCollectionGeoJson, await res.json())
};