import {z} from 'zod'

export type GetApiV1HotelsSearchLinkArgs = {cityCode: string, checkIn: string, checkOut: string, adults?: number | undefined, children?: number | undefined, childrenAges?: string | undefined, rooms?: number | undefined, currency?: string | undefined, locale?: string | undefined, siteCode?: string | undefined};

export type GetApiV1HotelsSearchLinkOptions = {baseUrl?: string | undefined, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV1HotelsSearchLinkResponse = z.object({searchUrl: z.string(), expires: z.literal(false)});

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
};

/**
 * Build a durable wego.com hotel search link
 * 
 * GET /v1/hotels/search-link
 * 
 * Also accepts auth: bearerAuth
 */
export const getApiV1HotelsSearchLink = async (args: GetApiV1HotelsSearchLinkArgs, options?: GetApiV1HotelsSearchLinkOptions) => {
const {baseUrl = "https://api.wego.com", fetch: fetchFn = fetch, oauth2} = options ?? {}

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

if (args.cityCode != null) query.append("cityCode", String(args.cityCode))
if (args.checkIn != null) query.append("checkIn", String(args.checkIn))
if (args.checkOut != null) query.append("checkOut", String(args.checkOut))
if (args.adults != null) query.append("adults", String(args.adults))
if (args.children != null) query.append("children", String(args.children))
if (args.childrenAges != null) query.append("childrenAges", String(args.childrenAges))
if (args.rooms != null) query.append("rooms", String(args.rooms))
if (args.currency != null) query.append("currency", String(args.currency))
if (args.locale != null) query.append("locale", String(args.locale))
if (args.siteCode != null) query.append("siteCode", String(args.siteCode))
if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/hotels/search-link${query.size > 0 ? `?${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(getApiV1HotelsSearchLinkResponse, await res.json())
};