import {z} from 'zod'

export type Chain = 'mainnet' | 'hoodi';

export type Cursor = string;

export type PageSize = number;

export type ValidatorIndex = number;

export type ValidatorPublicKey = string;

export type ValidatorIndexPublicKey = ValidatorIndex | ValidatorPublicKey;

export type ValidatorIndexPublicKeys = Array<ValidatorIndexPublicKey>;

export type ValidatorsByIdentifiers = {validator_identifiers: ValidatorIndexPublicKeys};

export type DashboardID = number;

export type DashboardGroupID = number | null;

export type ValidatorsByDashboard = {dashboard_id: DashboardID, group_id?: DashboardGroupID | undefined};

export type ExecutionLayerAddress = string;

export type ValidatorsByDeposit = {deposit_address: ExecutionLayerAddress};

export type AddressOrCredential = string;

export type ValidatorsByWithdrawal = {withdrawal: AddressOrCredential};

export type ValidatorsByEntity = {entity: string, sub_entity?: string | undefined};

export type ValidatorsSelector = ValidatorsByIdentifiers | ValidatorsByDashboard | ValidatorsByDeposit | ValidatorsByWithdrawal | ValidatorsByEntity;

export type CreateApiApiV2EthereumValidatorsMetadataArgs = {body: {chain?: Chain | undefined, cursor?: Cursor | undefined, page_size?: PageSize | undefined, validator: ValidatorsSelector}};

export type CreateApiApiV2EthereumValidatorsMetadataOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const validatorIndex = z.number().int().gte(0);

export const validatorPublicKey = z.string();

export const validator = z.object({index: validatorIndex.nullable().optional(), public_key: validatorPublicKey.optional()});

export const withdrawalCredentialType = z.enum(["bls", "execution_address"]);

export const withdrawalCredentialPrefix = z.enum(["0x00", "0x01", "0x02"]);

export const withdrawalCredentialPrimitive = z.string();

export const executionLayerAddress = z.string();

export const withdrawalCredential = z.object({type: withdrawalCredentialType, prefix: withdrawalCredentialPrefix, credential: withdrawalCredentialPrimitive, address: executionLayerAddress.optional()});

export const entityName = z.string();

export const subEntityName = z.string();

export const validatorMetadataData = z.object({validator: validator, withdrawal_credentials: withdrawalCredential, deposit_address: executionLayerAddress.nullable().optional(), entity: entityName.nullable().optional(), sub_entity: subEntityName.nullable().optional()});

export const paging = z.object({next_cursor: z.string().optional()});

export const createApiApiV2EthereumValidatorsMetadataResponse = z.object({data: z.array(validatorMetadataData), paging: paging.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
};

/**
 * 💎 Validator Metadata
 * 
 * POST /api/v2/ethereum/validators/metadata
 */
export const createApiApiV2EthereumValidatorsMetadata = async (args: CreateApiApiV2EthereumValidatorsMetadataArgs, options?: CreateApiApiV2EthereumValidatorsMetadataOptions) => {
const {baseUrl = "https://beaconcha.in", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set('authorization', `Bearer ${ApiKeyAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/ethereum/validators/metadata${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiApiV2EthereumValidatorsMetadataResponse, await res.json())
};