import {z} from 'zod'

export type GetApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightArgs = {last_height: unknown};

export type GetApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightResponse = z.object({upgraded_consensus_state: z.string().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
};

/**
 * UpgradedConsensusState queries the consensus state that will serve
 * as a trusted kernel for the next version of this chain. It will only be
 * stored at the last height of this chain.
 * UpgradedConsensusState RPC not supported with legacy querier
 * This rpc is deprecated now that IBC has its own replacement
 * (https://github.com/cosmos/ibc-go/blob/2c880a22e9f9cc75f62b527ca94aa75ce1106001/proto/ibc/core/client/v1/query.proto#L54)
 * 
 * GET /cosmos/upgrade/v1beta1/upgraded_consensus_state/{last_height}
 */
export const getApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeight = async (args: GetApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightArgs, options: GetApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/cosmos/upgrade/v1beta1/upgraded_consensus_state/${encodeURIComponent(String(args.last_height))}${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(getApiCosmosUpgradeV1beta1UpgradedConsensusStateLastHeightResponse, await res.json())
};