import {z} from 'zod'

export type GetApiV2DeparturesStationStationArgs = {station: string, verbose?: boolean | undefined, language?: ('nl' | 'en') | undefined};

export type GetApiV2DeparturesStationStationOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const stationObject = z.object({code: z.string().optional(), short: z.string().optional(), medium: z.string().optional(), long: z.string().optional()});

export const departureWing = z.object({destination_actual: stationObject.optional(), destination_planned: stationObject.optional(), material: z.array(z.object({accessible: z.boolean().optional(), destination: z.string().optional(), destination_code: z.string().optional(), number: z.string().optional(), remains_behind: z.boolean().optional(), type: z.string().optional()})).optional(), remarks: z.array(z.string()).optional(), stops: z.array(z.object({code: z.string().optional(), short: z.string().optional(), medium: z.string().optional(), long: z.string().optional(), accessible: z.boolean().optional(), arrival_cancelled: z.boolean().optional(), arrival_delay: z.number().int().gte(0).optional(), arrival_platform: z.string().optional(), arrival_platform_changed: z.boolean().optional(), arrival_time: z.string().optional(), assistance_available: z.unknown(), departure_cancelled: z.boolean().optional(), departure_delay: z.number().int().gte(0).optional(), departure_platform: z.string().optional(), departure_platform_changed: z.boolean().optional(), departure_time: z.string().optional()})).optional()});

export const departure = z.object({cancelled: z.boolean().optional(), company: z.string().optional(), delay: z.number().int().gte(0).optional(), departure_time: z.string().optional(), destination_actual: z.string().optional(), destination_actual_codes: z.array(z.string()).optional(), destination_planned: z.string().optional(), platform_actual: z.string().optional(), platform_planned: z.string().optional(), platform_changed: z.boolean().optional(), remarks: z.array(z.string()).optional(), tips: z.array(z.string()).optional(), service_date: z.string().optional(), service_id: z.string().optional(), service_number: z.string().optional(), station: z.string().optional(), status: z.number().int().optional(), timestamp: z.string().optional(), type: z.string().optional(), type_code: z.string().optional(), via: z.string().optional(), wings: z.array(departureWing).optional()});

export const statusField = z.enum(["UNKNOWN", "DOWN", "RECOVERING", "UP"]);

export const getApiV2DeparturesStationStationResponse = z.object({arrivals: z.array(departure).optional(), status: statusField.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
};

/**
 * Retrieve departures for station
 * 
 * GET /v2/departures/station/{station}
 */
export const getApiV2DeparturesStationStation = async (args: GetApiV2DeparturesStationStationArgs, options?: GetApiV2DeparturesStationStationOptions) => {
const {baseUrl = "http://localhost:8080", fetch: fetchFn = fetch} = options ?? {}

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

if (args.verbose != null) query.append("verbose", String(args.verbose))
if (args.language != null) query.append("language", String(args.language))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/departures/station/${encodeURIComponent(String(args.station))}${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(getApiV2DeparturesStationStationResponse, await res.json())
};