import {z} from 'zod'

export type GetApiAdDealsFlightsRouteSlugArgs = {route_slug: string, departure_date?: (string | null) | undefined, return_date?: (string | null) | undefined, utm_origin?: (string | null) | undefined, utm_destination?: (string | null) | undefined, utm_route?: (string | null) | undefined, utm_source_table?: (string | null) | undefined, utm_rank?: (string | null) | undefined, timezone?: (string | null) | undefined};

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

export const adPlace = z.object({name: z.string(), code: z.string()});

export const flightSearchDefaults = z.object({departure_date: z.string().nullable().optional(), return_date: z.string().nullable().optional(), trip_length_days: z.number().int().nullable().optional(), passengers: z.number().int().nullable().optional(), cabin_class: z.string().nullable().optional(), outbound_only_display: z.boolean().nullable().optional()});

export const flightAdCuration = z.object({take: z.string().optional(), context: z.string().optional()});

export const adFlightPrice = z.object({amount: z.number().int(), currency: z.string()});

export const adFlight = z.object({observation_id: z.string(), carrier: z.string(), carrier_code: z.string(), flight_numbers: z.string(), origin: z.string().nullable().optional(), destination: z.string().nullable().optional(), departure_time: z.string().nullable().optional(), arrival_time: z.string().nullable().optional(), duration_minutes: z.number().int().nullable().optional(), stops: z.number().int().optional(), price: adFlightPrice, axel_price_flight_only: adFlightPrice.nullable().optional(), axel_member_price: adFlightPrice.nullable().optional(), savings: adFlightPrice.nullable().optional(), departure_token: z.string().nullable().optional(), booking_token: z.string().nullable().optional(), layovers: z.array(z.record(z.string(), z.unknown())).optional(), tag: z.string().optional(), is_pick: z.boolean().optional()});

export const flightAdDealResponse = z.object({deal_type: z.literal("flight").optional(), route_slug: z.string(), origin: adPlace, destination: adPlace, defaults: flightSearchDefaults, searched_at: z.string(), observed_at: z.string().nullable().optional(), flights_checked: z.number().int(), filtered_count: z.number().int().optional(), price_insights: z.record(z.string(), z.unknown()).nullable().optional(), intro_message: z.string().optional(), curation: flightAdCuration, flights: z.array(adFlight)});

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 Flight Ad Deal
 * 
 * GET /ad-deals/flights/{route_slug}
 */
export const getApiAdDealsFlightsRouteSlug = async (args: GetApiAdDealsFlightsRouteSlugArgs, options: GetApiAdDealsFlightsRouteSlugOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.departure_date != null) query.append("departure_date", String(args.departure_date))
if (args.return_date != null) query.append("return_date", String(args.return_date))
if (args.utm_origin != null) query.append("utm_origin", String(args.utm_origin))
if (args.utm_destination != null) query.append("utm_destination", String(args.utm_destination))
if (args.utm_route != null) query.append("utm_route", String(args.utm_route))
if (args.utm_source_table != null) query.append("utm_source_table", String(args.utm_source_table))
if (args.utm_rank != null) query.append("utm_rank", String(args.utm_rank))
if (args.timezone != null) query.append("timezone", String(args.timezone))

const url = `${baseUrl.replace(/\/+$/, '')}/ad-deals/flights/${encodeURIComponent(String(args.route_slug))}${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(flightAdDealResponse, await res.json())
};