import {z} from 'zod'

export type GetApiV2RewardsValidationRoundsArgs = {election_id?: number | undefined, block?: number | undefined, unixtime?: number | undefined};

export type GetApiV2RewardsValidationRoundsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const validationRound = z.object({bonuses: z.number().int().optional(), election_id: z.number().int(), end_block: z.number().int().optional(), end_utime: z.number().int().optional(), finished: z.boolean(), next_election_id: z.number().int().optional(), prev_election_id: z.number().int().optional(), start_block: z.number().int(), start_utime: z.number().int().optional(), total_stake: z.number().int().optional()});

export const validationRoundsResponse = z.object({response_time_ms: z.number().int(), rounds: z.array(validationRound)});

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 validation round metadata
 * 
 * GET /v2/rewards/validation-rounds
 */
export const getApiV2RewardsValidationRounds = async (args: GetApiV2RewardsValidationRoundsArgs, options?: GetApiV2RewardsValidationRoundsOptions) => {
const {baseUrl = "https://tonapi.io", fetch: fetchFn = fetch} = options ?? {}

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

if (args.election_id != null) query.append("election_id", String(args.election_id))
if (args.block != null) query.append("block", String(args.block))
if (args.unixtime != null) query.append("unixtime", String(args.unixtime))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/rewards/validation-rounds${query.size > 0 ? `?${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(validationRoundsResponse, await res.json())
};