// Models/ChatResponseExtensions.cs
namespace OASystem.API.OAMethodLib.TokenHubAI.Models;

/// <summary>
/// ChatResponse 扩展方法
/// </summary>
public static class ChatResponseExtensions
{
    /// <summary>
    /// 获取第一个选择的消息内容
    /// </summary>
    public static string? GetFirstContent(this ChatResponse response)
    {
        if (response.Choices != null && response.Choices.Count > 0)
        {
            var choice = response.Choices[0];
            return choice.Message?.Content ?? choice.Delta?.Content;
        }
        return response.Content;
    }

    /// <summary>
    /// 获取完成原因
    /// </summary>
    public static string? GetFinishReason(this ChatResponse response)
    {
        if (response.Choices != null && response.Choices.Count > 0)
        {
            return response.Choices[0].FinishReason;
        }
        return response.FinishReason;
    }

    /// <summary>
    /// 是否正常结束
    /// </summary>
    public static bool IsNormalEnd(this ChatResponse response)
    {
        var reason = response.GetFinishReason();
        return reason is null or "stop";
    }

    /// <summary>
    /// 是否被内容过滤
    /// </summary>
    public static bool IsContentFiltered(this ChatResponse response)
    {
        return response.GetFinishReason() == "content_filter";
    }

    /// <summary>
    /// 是否达到长度限制
    /// </summary>
    public static bool IsLengthLimit(this ChatResponse response)
    {
        return response.GetFinishReason() == "length";
    }

    ///// <summary>
    ///// 获取工具调用列表
    ///// </summary>
    //public static List<ToolCall>? GetToolCalls(this ChatResponse response)
    //{
    //    if (response.Choices != null && response.Choices.Count > 0)
    //    {
    //        var message = response.Choices[0].Message;
    //        return message?.ToolCalls;
    //    }
    //    return response.ToolCalls;
    //}
}