import {z} from 'zod'

export type GetApiSmartContractsAddressHashArgs = {address_hash: string};

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

export const contractSource = z.object({file_path: z.string().optional(), source_code: z.string().optional()});

export const constructorArguments = z.object({});

export const externalLibrary = z.object({name: z.string(), address_hash: z.string()});

export const smartContract = z.object({verified_twin_address_hash: z.string().optional(), is_verified: z.boolean().optional(), is_changed_bytecode: z.boolean().optional(), is_partially_verified: z.boolean().optional(), is_fully_verified: z.boolean().optional(), is_verified_via_sourcify: z.boolean().optional(), is_verified_via_eth_bytecode_db: z.boolean().optional(), can_be_visualized_via_sol2uml: z.boolean().optional(), minimal_proxy_address_hash: z.string().optional(), sourcify_repo_url: z.string().optional(), name: z.string().optional(), optimization_enabled: z.boolean().optional(), optimizations_runs: z.number().int().optional(), compiler_version: z.string().optional(), evm_version: z.string().optional(), verified_at: z.string().optional(), abi: z.string().optional(), source_code: z.string().optional(), file_path: z.string().optional(), compiler_settings: z.object({}).optional(), constructor_args: z.string().optional(), additional_sources: z.array(contractSource).optional(), decoded_constructor_args: z.array(constructorArguments).optional(), deployed_bytecode: z.string().optional(), creation_bytecode: z.string().optional(), external_libraries: z.array(externalLibrary).optional(), language: z.string().optional(), creation_status: 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
};

/**
 * get smart contract
 * 
 * GET /smart-contracts/{address_hash}
 */
export const getApiSmartContractsAddressHash = async (args: GetApiSmartContractsAddressHashArgs, options?: GetApiSmartContractsAddressHashOptions) => {
const {baseUrl = "https://eth.blockscout.com/api/v2", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/smart-contracts/${encodeURIComponent(String(args.address_hash))}${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(smartContract, await res.json())
};