import {z} from 'zod'

export type Runtime = 'emerald' | 'sapphire' | 'pontusxtest' | 'pontusxdev' | 'cipher';

export type EthOrOasisAddress = string;

export type GetApiRuntimeEvmTokensAddressArgs = {runtime: Runtime, address: EthOrOasisAddress};

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

export const evmTokenType = z.enum(["ERC20", "ERC721"]);

export const textBigInt = z.string();

export const evmTokenSwap = z.object({pair_address: z.string(), pair_address_eth: z.string().optional(), factory_address: z.string().optional(), factory_address_eth: z.string().optional(), token0_address: z.string().optional(), token0_address_eth: z.string().optional(), token1_address: z.string().optional(), token1_address_eth: z.string().optional(), create_round: z.number().int().optional(), reserve0: textBigInt.optional(), reserve1: textBigInt.optional(), last_sync_round: z.number().int().optional()});

export const evmRefToken = z.object({type: evmTokenType, name: z.string().optional(), symbol: z.string().optional(), decimals: z.number().int().optional()});

export const verificationLevel = z.enum(["partial", "full"]);

export const evmToken = z.object({contract_addr: z.string(), eth_contract_addr: z.string(), name: z.string().optional(), symbol: z.string().optional(), decimals: z.number().int().optional(), type: evmTokenType, total_supply: textBigInt.optional(), num_transfers: z.number().int().optional(), num_holders: z.number().int(), ref_swap: evmTokenSwap.optional(), ref_token: evmRefToken.optional(), relative_token_address: z.string().optional(), relative_price: z.number().optional(), relative_total_value: z.number().optional(), is_verified: z.boolean(), verification_level: verificationLevel.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
};

/**
 * Returns info on an EVM (ERC-20, ...) token on the runtime.
 * 
 * GET /{runtime}/evm_tokens/{address}
 */
export const getApiRuntimeEvmTokensAddress = async (args: GetApiRuntimeEvmTokensAddressArgs, options?: GetApiRuntimeEvmTokensAddressOptions) => {
const {baseUrl = "https://nexus.oasis.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.runtime))}/evm_tokens/${encodeURIComponent(String(args.address))}${query.size > 0 ? `?${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(evmToken, await res.json())
};