import {z} from 'zod'

export type ChainDescriptor = 'ATOM_COS' | 'AXL' | 'AXL_TEST' | 'CELESTIA' | 'DYDX_DYDX' | 'ETH' | 'ETH_TEST6' | 'ETH_TEST_HOODI' | 'INJ_INJ' | 'MANTRA' | 'MATIC' | 'OSMO' | 'POL' | 'POL_TEST' | 'SOL' | 'SOL_TEST' | 'STETH_ETH' | 'STETH_ETH_TEST6_DZFA' | 'STETH_ETH_TEST_HOODI';

export type GetApiStakingChainsChainDescriptorChainInfoArgs = {chainDescriptor: ChainDescriptor};

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

export const additionalInfo = z.object({lockupPeriod: z.number(), activationPeriod: z.number()});

export const chainInfoResponse = z.object({chainDescriptor: z.string(), currentEpoch: z.number(), epochElapsed: z.number(), epochDuration: z.number(), additionalInfo: additionalInfo, lastUpdated: z.number()});

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 chain-level staking parameters
 * 
 * GET /staking/chains/{chainDescriptor}/chainInfo
 */
export const getApiStakingChainsChainDescriptorChainInfo = async (args: GetApiStakingChainsChainDescriptorChainInfoArgs, options?: GetApiStakingChainsChainDescriptorChainInfoOptions) => {
const {baseUrl = "https://api.fireblocks.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/staking/chains/${encodeURIComponent(String(args.chainDescriptor))}/chainInfo${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(chainInfoResponse, await res.json())
};