namespace OASystem.API.OAMethodLib.TokenHubAI.Models;

/// <summary>
/// TokenHub 业务错误码常量
/// </summary>
public static class TokenHubErrorCode
{
    // 400 系列 - 客户端请求错误
    public const string InvalidRequest = "400001";
    public const string InvalidParameter = "400002";
    public const string InputTooLong = "400003";
    public const string ModelNotFound = "400004";
    public const string UnsupportedModel = "400005";
    public const string UnsupportedFormat = "400006";

    // 401 系列 - 认证错误
    public const string Unauthorized = "401001";
    public const string InvalidApiKey = "401002";
    public const string ApiKeyExpired = "401003";
    public const string ApiKeyDisabled = "401004";
    public const string SignatureInvalid = "401005";
    public const string InvalidEndpoint = "401006";

    // 402 系列 - 计费错误
    public const string NoFreePackage = "401007";
    public const string FreeQuotaExhausted = "401008";

    // 403 系列 - 权限错误
    public const string PermissionDenied = "403001";
    public const string ModelAccessDenied = "403002";
    public const string AccountBlocked = "403003";
    public const string InsufficientBalance = "403004";
    public const string IPNotAllowed = "403005";

    // 429 系列 - 限流错误
    public const string RateLimitExceeded = "429001";
    public const string RPMLimitExceeded = "429002";
    public const string TPMLimitExceeded = "429003";
    public const string TPDLimitExceeded = "429004";
    public const string ConcurrencyLimitExceeded = "429005";

    // 451 - 内容安全
    public const string ContentFiltered = "451001";

    // 499 - 请求取消
    public const string RequestCanceled = "499001";

    // 410 - 会话过期
    public const string SessionExpired = "410001";

    // 500 系列 - 服务端错误
    public const string InternalError = "500001";
    public const string UpstreamError = "502001";
    public const string ServiceUnavailable = "503001";
    public const string GatewayTimeout = "504001";

    /// <summary>
    /// 判断是否为客户端错误（需修改请求）
    /// </summary>
    public static bool IsClientError(string? code)
    {
        return code switch
        {
            InvalidRequest or InvalidParameter or InputTooLong or
            ModelNotFound or UnsupportedModel or UnsupportedFormat or
            Unauthorized or InvalidApiKey or ApiKeyExpired or
            ApiKeyDisabled or SignatureInvalid or InvalidEndpoint or
            PermissionDenied or ModelAccessDenied or IPNotAllowed or
            ContentFiltered => true,
            _ => false
        };
    }

    /// <summary>
    /// 判断是否为计费相关错误
    /// </summary>
    public static bool IsBillingError(string? code)
    {
        return code switch
        {
            NoFreePackage or FreeQuotaExhausted or
            InsufficientBalance or AccountBlocked => true,
            _ => false
        };
    }

    /// <summary>
    /// 判断是否为限流错误
    /// </summary>
    public static bool IsRateLimitError(string? code)
    {
        return code switch
        {
            RateLimitExceeded or RPMLimitExceeded or
            TPMLimitExceeded or TPDLimitExceeded or
            ConcurrencyLimitExceeded => true,
            _ => false
        };
    }
}