namespace CeresSharp.Exceptions;

/// <summary>
/// Base exception for all Ceres-related errors.
/// </summary>
public class CeresException : Exception
{
    /// <summary>
    /// Gets the error code associated with this exception.
    /// </summary>
    public CeresErrorCode ErrorCode { get; }

    public CeresException(CeresErrorCode errorCode, string? message = null)
        : base(message ?? GetDefaultMessage(errorCode))
    {
        ErrorCode = errorCode;
    }

    public CeresException(CeresErrorCode errorCode, string? message, Exception? innerException)
        : base(message ?? GetDefaultMessage(errorCode), innerException)
    {
        ErrorCode = errorCode;
    }

    private static string GetDefaultMessage(CeresErrorCode errorCode) => errorCode switch
    {
        CeresErrorCode.Success => "Operation succeeded",
        CeresErrorCode.NullPointer => "Null pointer argument",
        CeresErrorCode.InvalidParameter => "Invalid parameter value",
        CeresErrorCode.InvalidEnum => "Invalid enum value",
        CeresErrorCode.Exception => "C++ exception occurred",
        CeresErrorCode.OutOfMemory => "Memory allocation failed",
        CeresErrorCode.InvalidOperation => "Invalid operation for current state",
        CeresErrorCode.BufferTooSmall => "Output buffer too small",
        CeresErrorCode.NotFound => "Resource not found",
        CeresErrorCode.AlreadyExists => "Resource already exists",
        _ => $"Unknown error code: {errorCode}"
    };
}

/// <summary>
/// Error codes returned by Ceres wrapper functions.
/// </summary>
public enum CeresErrorCode
{
    Success = 0,
    NullPointer = 1,
    InvalidParameter = 2,
    InvalidEnum = 3,
    Exception = 4,
    OutOfMemory = 5,
    InvalidOperation = 6,
    BufferTooSmall = 7,
    NotFound = 8,
    AlreadyExists = 9
}