import {z} from 'zod'

export type GetApiChainIdApiV2ValidatorsZilliqaArgs = {items_count?: number | undefined, index?: number | undefined, sort?: 'index' | undefined, order?: ('asc' | 'desc') | undefined, chain_id: string};

export type GetApiChainIdApiV2ValidatorsZilliqaOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const integerString = z.string();

export const hexData = z.string();

export const staker = z.object({balance: integerString, bls_public_key: hexData, index: z.number().int()});

export const getApiChainIdApiV2ValidatorsZilliqaResponse = z.object({items: z.array(staker), next_page_params: z.record(z.string(), z.unknown()).nullable()});

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
};

/**
 * Zilliqa validators list.
 * 
 * GET /{chain_id}/api/v2/validators/zilliqa
 * 
 * Also accepts auth: apiKeyAuth
 */
export const getApiChainIdApiV2ValidatorsZilliqa = async (args: GetApiChainIdApiV2ValidatorsZilliqaArgs, options?: GetApiChainIdApiV2ValidatorsZilliqaOptions) => {
const {baseUrl = "https://api.blockscout.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.items_count != null) query.append("items_count", String(args.items_count))
if (args.index != null) query.append("index", String(args.index))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.order != null) query.append("order", String(args.order))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.chain_id))}/api/v2/validators/zilliqa${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(getApiChainIdApiV2ValidatorsZilliqaResponse, await res.json())
};