import { ContractFactory } from "ethers";

import { BytecodeFactory, TypechainFactoryClass } from "./adapter.js";
import { BaseTxFields, KeyDeploymentFields, KeyTransactionFields } from "./tools.js";

import { MigrateError } from "../internal/utils/index.js";

export function ValidateKeyDeploymentFields<This, F extends (this: This, ...args: any[]) => any>(
  value: F,
  _context: ClassMethodDecoratorContext<This, F>,
) {
  return function (this: This, ...args: Parameters<F>): ReturnType<F> {
    const key = args[0] as KeyDeploymentFields;

    baseTxValidation(key, "KeyDeploymentFields");

    return value.apply(this, args) as ReturnType<F>;
  } as F;
}

export function ValidateKeyTxFields<This, F extends (this: This, ...args: any[]) => any>(
  value: F,
  _context: ClassMethodDecoratorContext<This, F>,
) {
  return function (this: This, ...args: Parameters<F>): ReturnType<F> {
    const key = args[0] as KeyTransactionFields;

    baseTxValidation(key, "KeyTransactionFields");

    if (!key.to || key.to === "") {
      throw new MigrateError(`KeyTransactionFields.to is not valid`);
    }

    if (key.name === undefined) {
      throw new MigrateError(`KeyTransactionFields.name is not valid`);
    }

    return value.apply(this, args) as ReturnType<F>;
  } as F;
}

export function isTypechainFactoryClass<A, I>(instance: any): instance is TypechainFactoryClass<A, I> {
  return instance.createInterface !== undefined;
}

export function isBytecodeFactory(instance: any): instance is BytecodeFactory {
  return instance.contractName !== undefined;
}

export function isEthersContractFactory(instance: any): instance is ContractFactory {
  return instance.interface !== undefined && instance.bytecode !== undefined;
}

function baseTxValidation(key: BaseTxFields, namespace: string) {
  if (!key.data || key.data === "") {
    throw new MigrateError(`${namespace}.data is not valid`);
  }

  if (!key.from || key.from === "") {
    throw new MigrateError(`${namespace}.from is not valid`);
  }

  if (!key.chainId || key.chainId === 0n) {
    throw new MigrateError(`${namespace}.chainId is not valid`);
  }

  if (key.value === undefined) {
    throw new MigrateError(`${namespace}.value is not valid`);
  }
}