import {z} from 'zod'

export type GetApiFlightBookingItinerariesObservationIdArgs = {observation_id: string};

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

export const flightDirection = z.enum(["outbound", "return"]);

export const schemasDomainFlightSegmentFlightSegment = z.object({flight_number: z.string().nullable().optional(), operating_carrier: z.string().nullable().optional(), departure_date: z.string().nullable().optional(), origin: z.string().nullable().optional(), destination: z.string().nullable().optional(), cabin: z.string().nullable().optional(), raw_supplier_cabin: z.string().nullable().optional(), cabin_source: z.enum(["supplier_segment_travel_class", "supplier_option_title_fare_family", "cabin_check_search", "operator_ticketed", "premium_search_inference"]).nullable().optional(), cabin_confidence: z.enum(["supplier_verified", "fare_family_inferred", "unknown", "conflict", "ticketed", "inferred_premium_search"]).nullable().optional(), cabin_mismatch_reason: z.string().nullable().optional(), cabin_ticketed_at: z.string().nullable().optional(), fare_family: z.string().nullable().optional(), fare_family_id: z.string().nullable().optional(), fare_family_source: z.string().nullable().optional(), fare_family_resolved_at: z.string().nullable().optional(), booking_class: z.string().nullable().optional(), departure_time: z.string().nullable().optional(), arrival_time: z.string().nullable().optional(), arrival_date: z.string().nullable().optional(), duration_minutes: z.number().int().nullable().optional(), marketing_carrier: z.string().nullable().optional(), marketing_flight_number: z.string().nullable().optional(), overnight: z.boolean().optional(), often_delayed: z.boolean().optional(), aircraft: z.string().nullable().optional(), origin_terminal: z.string().nullable().optional(), destination_terminal: z.string().nullable().optional(), origin_city: z.string().nullable().optional(), destination_city: z.string().nullable().optional()});

export const flightLeg = z.object({direction: flightDirection.nullable().optional(), segments: z.array(schemasDomainFlightSegmentFlightSegment).optional()});

export const flightItinerary = z.object({legs: z.array(flightLeg).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 Checkout Itinerary
 * 
 * GET /flight-booking/itineraries/{observation_id}
 */
export const getApiFlightBookingItinerariesObservationId = async (args: GetApiFlightBookingItinerariesObservationIdArgs, options: GetApiFlightBookingItinerariesObservationIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/flight-booking/itineraries/${encodeURIComponent(String(args.observation_id))}${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(flightItinerary, await res.json())
};