import {z} from 'zod'

export type GetApiAirportsNearbyArgs = {latitude: number, longitude: number, radius: number, only_iap?: boolean | undefined, max_pages?: number | undefined, cursor?: string | undefined};

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

export const getApiAirportsNearbyResponse = z.object({links: z.object({next: z.string()}).nullable(), num_pages: z.number().int().gte(1), airports: z.array(z.object({airport_code: z.string(), code_icao: z.string().nullable().optional(), code_iata: z.string().nullable().optional(), code_lid: z.string().nullable().optional(), alternate_ident: z.string().nullable(), name: z.string(), type: z.enum(["Airport", "Heliport", "Seaplane Base", "Ultralight", "Stolport", "Gliderport", "Balloonport", "null"]).nullable().optional(), elevation: z.number(), city: z.string(), state: z.string(), longitude: z.number(), latitude: z.number(), timezone: z.string(), country_code: z.string(), wiki_url: z.string().nullable(), airport_flights_url: z.string(), distance: z.number().int(), heading: z.number().int().gte(1).lte(360), direction: z.enum(["N", "E", "S", "W", "NE", "SE", "SW", "NW"])}))});

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 airports near a location
 * 
 * GET /airports/nearby
 */
export const getApiAirportsNearby = async (args: GetApiAirportsNearbyArgs, options?: GetApiAirportsNearbyOptions) => {
const {baseUrl = "https://aeroapi.flightaware.com/aeroapi", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json; charset=UTF-8")

if (args.latitude != null) query.append("latitude", String(args.latitude))
if (args.longitude != null) query.append("longitude", String(args.longitude))
if (args.radius != null) query.append("radius", String(args.radius))
if (args.only_iap != null) query.append("only_iap", String(args.only_iap))
if (args.max_pages != null) query.append("max_pages", String(args.max_pages))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (ApiKeyAuth !== undefined) headers.set("x-apikey", ApiKeyAuth)

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