import {z} from 'zod'

export type GeneratedFlightLaterDatesQuery = {origin: string, destination: string, departure_date: string, days?: number | undefined, minimum_nights?: number | undefined, round_trip?: boolean | undefined};

export type CreateApiConvFlightOffersCalendarLaterArgs = {body: GeneratedFlightLaterDatesQuery};

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

export const generatedFlightLaterService = z.object({airline_code: z.string().nullable(), airline_name: z.string().nullable(), stops: z.number().int(), connection_airports: z.array(z.string())});

export const generatedFlightLaterOption = z.object({amount: z.number().int().gt(0), services: z.array(z.number().int())});

export const generatedFlightLaterPrice = z.object({amount: z.number().int().gt(0), services: z.array(z.number().int()), nights: z.number().int().gte(0).lte(14), alternative: generatedFlightLaterOption.nullable().optional()});

export const generatedFlightLaterDay = z.object({departure_date: z.string(), one_way: generatedFlightLaterPrice.nullable(), round_trips: z.array(generatedFlightLaterPrice)});

export const generatedFlightLaterDates = z.object({issued_at: z.string().nullable(), services: z.array(generatedFlightLaterService), days: z.array(generatedFlightLaterDay)});

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
};

/**
 * Later Dates
 * 
 * POST /conv/flight-offers/calendar/later
 */
export const createApiConvFlightOffersCalendarLater = async (args: CreateApiConvFlightOffersCalendarLaterArgs, options: CreateApiConvFlightOffersCalendarLaterOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/conv/flight-offers/calendar/later${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(generatedFlightLaterDates, await res.json())
};