namespace OASystem.API.OAMethodLib.TokenHubAI.Models;

/// <summary>
/// TokenHub AI 聊天响应
/// </summary>
public class ChatResponse
{
    // ============ 响应标识 ============

    /// <summary>
    /// 响应 ID
    /// </summary>
    public string? Id { get; set; }

    /// <summary>
    /// 使用的模型
    /// </summary>
    public string? Model { get; set; }

    /// <summary>
    /// 对象类型
    /// </summary>
    public string? Object { get; set; }

    /// <summary>
    /// 创建时间戳
    /// </summary>
    public long? Created { get; set; }

    // ============ 响应内容 ============

    /// <summary>
    /// 回复内容
    /// </summary>
    public string? Content { get; set; }

    /// <summary>
    /// 完整的选择列表
    /// </summary>
    public List<Choice>? Choices { get; set; }

    /// <summary>
    /// Token 使用统计
    /// </summary>
    public TokenUsage? Usage { get; set; }

    // ============ 工具调用 ============

    /// <summary>
    /// 工具调用列表（Function Calling）
    /// </summary>
    public List<ToolCall>? ToolCalls { get; set; }

    // ============ 状态信息 ============

    /// <summary>
    /// 是否成功
    /// </summary>
    public bool IsSuccess { get; set; }

    /// <summary>
    /// 错误信息（如有）
    /// </summary>
    public string? ErrorMessage { get; set; }

    /// <summary>
    /// 完成原因
    /// </summary>
    /// <remarks>
    /// - stop：正常结束
    /// - length：达到最大长度
    /// - content_filter：内容被过滤
    /// - tool_calls：工具调用
    /// </remarks>
    public string? FinishReason { get; set; }

    /// <summary>
    /// 原始响应 JSON（调试用）
    /// </summary>
    public string? RawJson { get; set; }

    // ============ 工厂方法 ============

    /// <summary>
    /// 创建成功响应
    /// </summary>
    public static ChatResponse Success(string content, string? model = null)
    {
        return new ChatResponse
        {
            IsSuccess = true,
            Content = content,
            Model = model,
            FinishReason = "stop"
        };
    }

    /// <summary>
    /// 创建失败响应
    /// </summary>
    public static ChatResponse Failure(string errorMessage)
    {
        return new ChatResponse
        {
            IsSuccess = false,
            ErrorMessage = errorMessage
        };
    }
}

/// <summary>
/// 选择项
/// </summary>
public class Choice
{
    /// <summary>
    /// 索引
    /// </summary>
    public int Index { get; set; }

    /// <summary>
    /// 消息
    /// </summary>
    public ChatMessage? Message { get; set; }

    /// <summary>
    /// 增量消息（流式）
    /// </summary>
    public ChatMessage? Delta { get; set; }

    /// <summary>
    /// 完成原因
    /// </summary>
    public string? FinishReason { get; set; }

    /// <summary>
    /// 日志概率
    /// </summary>
    public object? LogProbs { get; set; }
}

/// <summary>
/// Token 使用统计
/// </summary>
public class TokenUsage
{
    /// <summary>
    /// 输入 Token 数
    /// </summary>
    public int PromptTokens { get; set; }

    /// <summary>
    /// 输出 Token 数
    /// </summary>
    public int CompletionTokens { get; set; }

    /// <summary>
    /// 总 Token 数
    /// </summary>
    public int TotalTokens { get; set; }

    /// <summary>
    /// 获取使用详情
    /// </summary>
    public override string ToString()
    {
        return $"输入: {PromptTokens}, 输出: {CompletionTokens}, 总计: {TotalTokens}";
    }
}