using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using ServerCore;


namespace ServerBase;

/*=============================================================================================
  Result 관련 확장 함수

  1. Result + Guard 조합 처리

    public Result doFunction(string input)
    {
        var owner = getOwner();
        NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!")
        ArgumentNullReferenceCheckHelper.throwIfNull(input, () => $"input is null !!! - {owner.toBasicString()}")

        var result = new Result();

        try
        {
            // 내부 로직 수행
            if (input.isNullOrWhiteSpace())
            {
                result.setFail(ServerErrorCode.InvalidArgument, "Input is empty.");
                return result;
            }

            // 비즈니스 로직 처리 성공
            result.setSuccess("Operation completed.");
            return result;
        }
        catch (Exception e)
        {
            // 예상치 못한 예외 발생시 실패 처리
	        err_msg = $"Exception !!!, Failed to perform, in xxx() !!! : exception:{e} - {owner.toBasicString()}";
            result.setFail(ServerErrorCode.InternalError, err_msg);
            return result;
        }
    }

  2. Result 값에 따른 예외 처리

    var result = server_logic.doFunction();

    // 실패시, 예외가 발생 한다 !!!, (발생되기 원하는 예외타입을 작성)
    result.throwIfFail(
        () => $"Failed to doFunction() !!!, Details: {result.toBasicString()}",
        msg => new DesiredException(msg)
    );

                                                                             author : kangms

=============================================================================================*/

public static class ResultHelper
{
    public static bool isSuccess(this Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        return result.ErrorCode.isSuccess();
    }

    public static bool isFail(this Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        return result.ErrorCode.isFail();
    }

    public static void setSuccess(this Result result, string resultString = "")
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        result.set(ServerErrorCode.Success, resultString);
    }

    public static void setFail(this Result result, ServerErrorCode errorCode, string resultString = "")
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        result.set(errorCode, resultString);
    }

    public static string getResultString(this Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        return result.ResultString;
    }

    public static ServerErrorCode getErrorCode(this Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        return result.ErrorCode;
    }

    public static void set(this Result result, ServerErrorCode errorCode, string resultString)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        result.ErrorCode = errorCode;
        result.ResultString = resultString;
    }

    public static void throwIfFail( this Result result
                                  , Func<string>? fnLog = null
                                  , Func<string, Exception>? overrideException = null )
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        if (result.ErrorCode.isSuccess())
            return;

        string message = fnLog?.Invoke() ?? $"Operation failed. ErrorCode: {result.ErrorCode}, ResultString: {result.ResultString}";

        if (null != overrideException)
        {
            throw overrideException(message);
        }

        throw new InvalidOperationException(message);
    }

    public static string toBasicString(this Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => "Result is null !!!");

        return $"ErrorInfo: errCode:{result.getErrorCode()}, errDesc:{result.getResultString()}";
    }
}