import {z} from 'zod'

export type GetApiReferenceDataRecommendedLocationsArgs = {cityCodes: string, travelerCountryCode?: string | undefined, destinationCountryCodes?: string | undefined};

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

export const warning = z.object({code: z.number().int(), title: z.string(), detail: z.string().optional(), source: z.object({parameter: z.string().optional(), pointer: z.string().optional(), example: z.string().optional()}).optional()});

export const recommendedLocation = z.object({subtype: z.string().optional(), name: z.string().optional(), iataCode: z.string().optional(), geoCode: z.object({latitude: z.number().gte(-90).lte(90).optional(), longitude: z.number().gte(-180).lte(180).optional()}).optional(), type: z.string().optional(), relevance: z.number().optional()});

export const meta = z.object({count: z.number().int().gte(0).optional(), links: z.object({self: z.string().optional()}).optional()});

export const responseRecommendedLocation = z.object({warnings: z.array(warning).optional(), data: z.array(recommendedLocation).optional(), meta: meta.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
};

/**
 * GET recommended destinations
 * 
 * GET /reference-data/recommended-locations
 */
export const getApiReferenceDataRecommendedLocations = async (args: GetApiReferenceDataRecommendedLocationsArgs, options?: GetApiReferenceDataRecommendedLocationsOptions) => {
const {baseUrl = "https://test.api.amadeus.com/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.cityCodes != null) query.append("cityCodes", String(args.cityCodes))
if (args.travelerCountryCode != null) query.append("travelerCountryCode", String(args.travelerCountryCode))
if (args.destinationCountryCodes != null) query.append("destinationCountryCodes", String(args.destinationCountryCodes))

const url = `${baseUrl.replace(/\/+$/, '')}/reference-data/recommended-locations${query.size > 0 ? `?${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(responseRecommendedLocation, await res.json())
};