import {z} from 'zod'

export type GetApiIsochroneJsonArgs = {key: unknown, coordinates: unknown, contours_minutes: number, contours_meters: number, mode?: ('car' | 'truck') | undefined, contours_colors?: unknown | undefined, polygons?: boolean | undefined, denoise?: number | undefined, generalize?: number | undefined, departure_time?: number | undefined};

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

export const getApiIsochroneJsonResponse = z.object({features: z.array(z.object({properties: z.object({fill: z.string().optional(), fillOpacity: z.number().optional(), fillColor: z.string().optional(), color: z.string().optional(), contour: z.number().optional(), opacity: z.number().optional(), metric: z.string().optional()}).optional(), geometry: z.object({coordinates: z.array(z.number()).optional(), type: z.string().optional()}).optional(), type: z.string().optional()})).optional(), type: z.string().optional(), status: z.string().optional(), msg: z.string().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
};

/**
 * Isochrone
 * 
 * GET /isochrone/json
 */
export const getApiIsochroneJson = async (args: GetApiIsochroneJsonArgs, options?: GetApiIsochroneJsonOptions) => {
const {baseUrl = "https://api.nextbillion.io", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.key != null) query.append("key", String(args.key))
if (args.coordinates != null) query.append("coordinates", String(args.coordinates))
if (args.contours_minutes != null) query.append("contours_minutes", String(args.contours_minutes))
if (args.contours_meters != null) query.append("contours_meters", String(args.contours_meters))
if (args.mode != null) query.append("mode", String(args.mode))
if (args.contours_colors != null) query.append("contours_colors", String(args.contours_colors))
if (args.polygons != null) query.append("polygons", String(args.polygons))
if (args.denoise != null) query.append("denoise", String(args.denoise))
if (args.generalize != null) query.append("generalize", String(args.generalize))
if (args.departure_time != null) query.append("departure_time", String(args.departure_time))
if (apiKey !== undefined) query.set("key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/isochrone/json${query.size > 0 ? `?${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(getApiIsochroneJsonResponse, await res.json())
};