import {z} from 'zod'

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

export const protocolVersion = z.object({p2p: z.string().optional(), block: z.string().optional(), app: z.string().optional()});

export const nodeInfo = z.object({protocol_version: protocolVersion.optional(), id: z.string().optional(), listen_addr: z.string().optional(), network: z.string().optional(), version: z.string().optional(), channels: z.string().optional(), moniker: z.string().optional(), other: z.object({tx_index: z.string().optional(), rpc_address: z.string().optional()}).optional()});

export const syncInfo = z.object({latest_block_hash: z.string().optional(), latest_app_hash: z.string().optional(), latest_block_height: z.string().optional(), latest_block_time: z.string().optional(), earliest_block_hash: z.string().optional(), earliest_app_hash: z.string().optional(), earliest_block_height: z.string().optional(), earliest_block_time: z.string().optional(), catching_up: z.boolean().optional()});

export const pubKey = z.object({type: z.string().optional(), value: z.string().optional()});

export const validatorInfo = z.object({address: z.string().optional(), pub_key: pubKey.optional(), voting_power: z.string().optional()});

export const status = z.object({node_info: nodeInfo.optional(), sync_info: syncInfo.optional(), validator_info: validatorInfo.optional()});

export const statusResponse = z.object({id: z.number().int().optional(), jsonrpc: z.string().optional(), result: status.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
};

/**
 * Node Status
 * 
 * GET /status
 */
export const getApiStatus = async (options?: GetApiStatusOptions) => {
const {baseUrl = "http://localhost:26657", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/status${query.size > 0 ? `?${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(statusResponse, await res.json())
};