import {z} from 'zod'

export type CreateApiAnkrGetBlockchainStatsArgs = {body: {id: number, jsonrpc: '2.0', method: 'ankr_getBlockchainStats', params: {blockchain?: (Array<'arbitrum' | 'avalanche' | 'base' | 'bsc' | 'eth' | 'fantom' | 'flare' | 'gnosis' | 'linea' | 'optimism' | 'polygon' | 'scroll' | 'somnia_mainnet' | 'taiko' | 'telos' | 'xlayer' | 'avalanche_fuji' | 'base_sepolia' | 'eth_sepolia' | 'optimism_sepolia' | 'polygon_amoy'>) | undefined}}};

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

export const createApiAnkrGetBlockchainStatsResponse = z.object({id: z.number().int(), jsonrpc: z.literal("2.0"), result: z.object({stats: z.array(z.object({blockTimeMs: z.number().int().gte(0), blockchain: z.string(), latestBlockNumber: z.number().int().gte(0), nativeCoinUsdPrice: z.string(), totalEventsCount: z.number().int().gte(0), totalTransactionsCount: z.number().int().gte(0)})).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
};

/**
 * Get per-chain stats: latest block, totals, native coin USD price
 * 
 * POST /?ankr_getBlockchainStats
 */
export const createApiAnkrGetBlockchainStats = async (args: CreateApiAnkrGetBlockchainStatsArgs, options?: CreateApiAnkrGetBlockchainStatsOptions) => {
const {baseUrl = "https://rpc.ankr.com/multichain/569ca1f392f7d3d0bb1073a1173ecb649af1d9249231fe59fa95db19d5ae41fe", fetch: fetchFn = fetch} = options ?? {}

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

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