import {z} from 'zod'

export type NamePrivileged = string;

export type NameBasic = string;

export type NameBid = string;

export type NameCatchAll = string;

export type Name = NamePrivileged | NameBasic | NameBid | NameCatchAll;

export type CreateApiGetCodeArgs = {body: {account_name: Name, code_as_wasm: number}};

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

export const namePrivileged = z.string();

export const nameBasic = z.string();

export const nameBid = z.string();

export const nameCatchAll = z.string();

export const name = z.union([namePrivileged, nameBasic, nameBid, nameCatchAll]);

export const sha256 = z.string();

export const cppSignature = z.string();

export const type = z.enum(["uint8", "uint16", "uint32", "uint64", "uint128", "float32", "float64", "float128", "bytes", "name", "string", "time_point", "time_point_sec", "symbol_code", "symbol", "asset", "checksum160", "checksum256", "checksum521", "public_key", "private_key", "signature", "account_name", "action_name"]);

export const abiType = z.object({new_type_name: cppSignature, type: type});

export const abiStructFields = z.object({name: cppSignature, type: type});

export const abiStruct = z.object({name: cppSignature, base: z.string(), fields: z.array(abiStructFields)});

export const abiAction = z.object({name: name, type: name, ricardian_contract: z.string()});

export const indexType = z.literal("i64");

export const keyType = z.enum(["uint64", "double"]);

export const abiTable = z.object({name: name, index_type: indexType, key_names: z.array(cppSignature).optional(), key_types: z.array(keyType).optional(), type: cppSignature.optional()});

export const extension = z.array(z.union([z.number().int(), z.string()]));

export const abi = z.object({version: z.string(), types: z.array(abiType), structs: z.array(abiStruct), actions: z.array(abiAction), tables: z.array(abiTable), abi_extensions: z.array(extension), error_messages: z.array(z.string()), ricardian_clauses: z.array(z.string()), variants: z.array(z.string())});

export const createApiGetCodeResponse = z.object({name: name.optional(), code_hash: sha256.optional(), wast: z.string().optional(), wasm: z.string().optional(), abi: abi.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 an object containing the smart contract WASM code.
 * 
 * POST /get_code
 */
export const createApiGetCode = async (args: CreateApiGetCodeArgs, options?: CreateApiGetCodeOptions) => {
const {baseUrl = "https://wax.greymass.com/v1/chain", 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 = `${baseUrl.replace(/\/+$/, '')}/get_code${query.size > 0 ? `?${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(createApiGetCodeResponse, await res.json())
};