import {z} from 'zod'

export type GetApiStandingsYearDriversArgs = {year: number};

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

export const driverStandingResponse = z.object({position: z.number().int().nullable().optional(), position_text: z.string(), driver_id: z.string(), driver_name: z.string(), driver_abbr: z.string(), driver_number: z.string().nullable().optional(), points: z.string(), race_wins: z.number().int(), pole_positions: z.number().int(), championship_won: z.boolean()});

export const getApiStandingsYearDriversResponse = z.array(driverStandingResponse);

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 Driver Standings
 * 
 * GET /standings/{year}/drivers
 */
export const getApiStandingsYearDrivers = async (args: GetApiStandingsYearDriversArgs, options: GetApiStandingsYearDriversOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/standings/${encodeURIComponent(String(args.year))}/drivers${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(getApiStandingsYearDriversResponse, await res.json())
};