import {z} from 'zod'

export type GetApiReferenceDataLocationsArgs = {subType: Array<'AIRPORT' | 'CITY'>, keyword: string, countryCode?: string | undefined, 'page[limit]'?: number | undefined, 'page[offset]'?: number | undefined, sort?: 'analytics.travelers.score' | undefined, view?: ('LIGHT' | 'FULL') | undefined};

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

export const collectionMeta = z.object({count: z.number().int().optional(), links: z.object({self: z.string().optional(), next: z.string().optional(), previous: z.string().optional(), last: z.string().optional(), first: z.string().optional(), up: z.string().optional()}).optional()});

export const links = z.object({href: z.string(), methods: z.array(z.enum(["GET", "PUT", "DELETE", "POST", "PATCH"])).optional(), count: z.number().int().optional()});

export const geoCode = z.object({latitude: z.number().optional(), longitude: z.number().optional()});

export const address = z.object({cityName: z.string().optional(), cityCode: z.string().optional(), countryName: z.string().optional(), countryCode: z.string().optional(), stateCode: z.string().optional(), regionCode: z.string().optional()});

export const distance = z.object({value: z.number().int().optional(), unit: z.enum(["KM", "MI"]).optional()});

export const travelers = z.object({score: z.number().optional()});

export const analytics = z.object({travelers: travelers.optional()});

export const location = z.object({id: z.string().optional(), self: links.optional(), type: z.string().optional(), subType: z.enum(["AIRPORT", "CITY", "POINT_OF_INTEREST", "DISTRICT"]).optional(), name: z.string().optional(), detailedName: z.string().optional(), timeZoneOffset: z.string().optional(), iataCode: z.string().optional(), geoCode: geoCode.optional(), address: address.optional(), distance: distance.optional(), analytics: analytics.optional(), relevance: z.number().optional(), category: z.enum(["SIGHTS", "BEACH_PARK", "HISTORICAL", "NIGHTLIFE", "RESTAURANT", "SHOPPING"]).optional(), tags: z.array(z.string()).optional(), rank: z.string().optional()});

export const getApiReferenceDataLocationsResponse = z.object({meta: collectionMeta.optional(), data: z.array(location)});

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 airports and cities matching a given keyword.
 * 
 * GET /reference-data/locations
 */
export const getApiReferenceDataLocations = async (args: GetApiReferenceDataLocationsArgs, options?: GetApiReferenceDataLocationsOptions) => {
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")

for (const item of args.subType ?? []) query.append("subType", String(item))
if (args.keyword != null) query.append("keyword", String(args.keyword))
if (args.countryCode != null) query.append("countryCode", String(args.countryCode))
if (args['page[limit]'] != null) query.append("page[limit]", String(args['page[limit]']))
if (args['page[offset]'] != null) query.append("page[offset]", String(args['page[offset]']))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.view != null) query.append("view", String(args.view))

const url = `${baseUrl.replace(/\/+$/, '')}/reference-data/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(getApiReferenceDataLocationsResponse, await res.json())
};