import {z} from 'zod'

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

export type Block = number;

export type BlockByNumber = {number: Block};

export type ChainView = 'latest' | 'finalized';

export type BlockByChainView = {view: ChainView};

export type BlockSelector = BlockByNumber | BlockByChainView;

export type CreateApiApiV2EthereumBlockArgs = {body: {chain?: Chain | undefined, block: BlockSelector}};

export type CreateApiApiV2EthereumBlockOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

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

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

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

export const consensusLayerBlockRoot = z.string();

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

export const consensusLayerReference = z.object({slot: slot, block_root: consensusLayerBlockRoot.nullable().optional(), epoch: epoch}).nullable();

export const executionLayerBlockHash = z.string();

export const hash = z.string();

export const wei = z.string();

export const blockOverviewGas = z.object({used: z.number().int(), limit: z.number().int(), base_fee: wei.nullable().optional(), fees_burned: wei.nullable().optional()});

export const blockOverviewTransactionCount = z.object({normal: z.number().int(), blob: z.number().int().nullable().optional(), internal: z.number().int()});

export const blockOverviewTransaction = z.object({gas: blockOverviewGas, count: blockOverviewTransactionCount});

export const blockOverviewBlobGas = z.object({used: z.number().int(), excess: z.number().int()});

export const blockOverviewBlob = z.object({gas: blockOverviewBlobGas}).nullable();

export const executionLayerAddress = z.string();

export const executionLayerAddressDetails = z.object({address: executionLayerAddress, is_contract: z.boolean()});

export const blockOverviewMining = z.object({miner: executionLayerAddressDetails, difficulty: z.string(), mix_hash: hash, uncles_sha3: hash, uncles_count: z.number().int()}).nullable();

export const finalityParams = z.enum(["not_finalized", "finalized"]);

export const blockOverviewData = z.object({block: block, timestamp: timestamp, consensus_reference: consensusLayerReference.optional(), hash: executionLayerBlockHash, parent_hash: executionLayerBlockHash, receipts_root: hash, state_root: hash, transaction: blockOverviewTransaction, blob: blockOverviewBlob.optional(), mining: blockOverviewMining.optional(), extra_data: z.string(), finality: finalityParams});

export const blockOverviewContainer = z.object({data: blockOverviewData});

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
};

/**
 * Block
 * 
 * POST /api/v2/ethereum/block
 */
export const createApiApiV2EthereumBlock = async (args: CreateApiApiV2EthereumBlockArgs, options?: CreateApiApiV2EthereumBlockOptions) => {
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/block${query.size > 0 ? `?${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(blockOverviewContainer, await res.json())
};