namespace GFramework.Core.logging;

/// <summary>
/// 日志抽象基类，封装日志级别判断、格式化与异常处理逻辑。
/// 平台日志器只需实现 Write 方法即可。
/// </summary>
public abstract class AbstractLogger(
    string? name = null,
    LogLevel minLevel = LogLevel.Info) : ILogger
{
    private readonly string _name = name ?? ILogger.RootLoggerName;

    #region Metadata

    /// <summary>
    /// 获取日志器的名称
    /// </summary>
    /// <returns>日志器名称</returns>
    public string Name() => _name;

    #endregion

    #region Level Checks

    /// <summary>
    /// 判断指定日志级别是否启用
    /// </summary>
    /// <param name="level">要检查的日志级别</param>
    /// <returns>如果指定级别大于等于最小级别则返回true，否则返回false</returns>
    protected bool IsEnabled(LogLevel level) => level >= minLevel;

    /// <summary>
    /// 检查Trace级别日志是否启用
    /// </summary>
    /// <returns>如果Trace级别启用返回true，否则返回false</returns>
    public bool IsTraceEnabled() => IsEnabled(LogLevel.Trace);
    
    /// <summary>
    /// 检查Debug级别日志是否启用
    /// </summary>
    /// <returns>如果Debug级别启用返回true，否则返回false</returns>
    public bool IsDebugEnabled() => IsEnabled(LogLevel.Debug);
    
    /// <summary>
    /// 检查Info级别日志是否启用
    /// </summary>
    /// <returns>如果Info级别启用返回true，否则返回false</returns>
    public bool IsInfoEnabled()  => IsEnabled(LogLevel.Info);
    
    /// <summary>
    /// 检查Warning级别日志是否启用
    /// </summary>
    /// <returns>如果Warning级别启用返回true，否则返回false</returns>
    public bool IsWarnEnabled()  => IsEnabled(LogLevel.Warning);
    
    /// <summary>
    /// 检查Error级别日志是否启用
    /// </summary>
    /// <returns>如果Error级别启用返回true，否则返回false</returns>
    public bool IsErrorEnabled() => IsEnabled(LogLevel.Error);
    
    /// <summary>
    /// 检查Fatal级别日志是否启用
    /// </summary>
    /// <returns>如果Fatal级别启用返回true，否则返回false</returns>
    public bool IsFatalEnabled() => IsEnabled(LogLevel.Fatal);

    #endregion

    #region Trace

    /// <summary>
    /// 记录Trace级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Trace(string msg) => Log(LogLevel.Trace, msg);
    
    /// <summary>
    /// 记录Trace级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Trace(string format, object arg) => Log(LogLevel.Trace, format, arg);
    
    /// <summary>
    /// 记录Trace级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Trace(string format, object arg1, object arg2) => Log(LogLevel.Trace, format, arg1, arg2);
    
    /// <summary>
    /// 记录Trace级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Trace(string format, params object[] arguments) => Log(LogLevel.Trace, format, arguments);
    
    /// <summary>
    /// 记录Trace级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Trace(string msg, Exception t) => Log(LogLevel.Trace, msg, t);

    #endregion

    #region Debug

    /// <summary>
    /// 记录Debug级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Debug(string msg) => Log(LogLevel.Debug, msg);
    
    /// <summary>
    /// 记录Debug级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Debug(string format, object arg) => Log(LogLevel.Debug, format, arg);
    
    /// <summary>
    /// 记录Debug级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Debug(string format, object arg1, object arg2) => Log(LogLevel.Debug, format, arg1, arg2);
    
    /// <summary>
    /// 记录Debug级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Debug(string format, params object[] arguments) => Log(LogLevel.Debug, format, arguments);
    
    /// <summary>
    /// 记录Debug级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Debug(string msg, Exception t) => Log(LogLevel.Debug, msg, t);

    #endregion

    #region Info

    /// <summary>
    /// 记录Info级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Info(string msg) => Log(LogLevel.Info, msg);
    
    /// <summary>
    /// 记录Info级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Info(string format, object arg) => Log(LogLevel.Info, format, arg);
    
    /// <summary>
    /// 记录Info级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Info(string format, object arg1, object arg2) => Log(LogLevel.Info, format, arg1, arg2);
    
    /// <summary>
    /// 记录Info级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Info(string format, params object[] arguments) => Log(LogLevel.Info, format, arguments);
    
    /// <summary>
    /// 记录Info级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Info(string msg, Exception t) => Log(LogLevel.Info, msg, t);

    #endregion

    #region Warn

    /// <summary>
    /// 记录Warning级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Warn(string msg) => Log(LogLevel.Warning, msg);
    
    /// <summary>
    /// 记录Warning级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Warn(string format, object arg) => Log(LogLevel.Warning, format, arg);
    
    /// <summary>
    /// 记录Warning级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Warn(string format, object arg1, object arg2) => Log(LogLevel.Warning, format, arg1, arg2);
    
    /// <summary>
    /// 记录Warning级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Warn(string format, params object[] arguments) => Log(LogLevel.Warning, format, arguments);
    
    /// <summary>
    /// 记录Warning级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Warn(string msg, Exception t) => Log(LogLevel.Warning, msg, t);

    #endregion

    #region Error

    /// <summary>
    /// 记录Error级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Error(string msg) => Log(LogLevel.Error, msg);
    
    /// <summary>
    /// 记录Error级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Error(string format, object arg) => Log(LogLevel.Error, format, arg);
    
    /// <summary>
    /// 记录Error级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Error(string format, object arg1, object arg2) => Log(LogLevel.Error, format, arg1, arg2);
    
    /// <summary>
    /// 记录Error级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Error(string format, params object[] arguments) => Log(LogLevel.Error, format, arguments);
    
    /// <summary>
    /// 记录Error级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Error(string msg, Exception t) => Log(LogLevel.Error, msg, t);

    #endregion

    #region Fatal

    /// <summary>
    /// 记录Fatal级别日志
    /// </summary>
    /// <param name="msg">日志消息</param>
    public void Fatal(string msg) => Log(LogLevel.Fatal, msg);
    
    /// <summary>
    /// 记录Fatal级别日志（带格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg">格式化参数</param>
    public void Fatal(string format, object arg) => Log(LogLevel.Fatal, format, arg);
    
    /// <summary>
    /// 记录Fatal级别日志（带两个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arg1">第一个格式化参数</param>
    /// <param name="arg2">第二个格式化参数</param>
    public void Fatal(string format, object arg1, object arg2) => Log(LogLevel.Fatal, format, arg1, arg2);
    
    /// <summary>
    /// 记录Fatal级别日志（带多个格式化参数）
    /// </summary>
    /// <param name="format">格式化字符串</param>
    /// <param name="arguments">格式化参数数组</param>
    public void Fatal(string format, params object[] arguments) => Log(LogLevel.Fatal, format, arguments);
    
    /// <summary>
    /// 记录Fatal级别日志（带异常信息）
    /// </summary>
    /// <param name="msg">日志消息</param>
    /// <param name="t">异常对象</param>
    public void Fatal(string msg, Exception t) => Log(LogLevel.Fatal, msg, t);

    #endregion

    #region Core Pipeline

    /// <summary>
    /// 核心日志记录方法（无参数）
    /// </summary>
    /// <param name="level">日志级别</param>
    /// <param name="message">日志消息</param>
    private void Log(LogLevel level, string message)
    {
        if (!IsEnabled(level)) return;
        Write(level, message, null);
    }

    /// <summary>
    /// 核心日志记录方法（带参数格式化）
    /// </summary>
    /// <param name="level">日志级别</param>
    /// <param name="format">格式化字符串</param>
    /// <param name="args">格式化参数数组</param>
    private void Log(LogLevel level, string format, params object[] args)
    {
        if (!IsEnabled(level)) return;
        Write(level, string.Format(format, args), null);
    }

    /// <summary>
    /// 核心日志记录方法（带异常）
    /// </summary>
    /// <param name="level">日志级别</param>
    /// <param name="message">日志消息</param>
    /// <param name="exception">异常对象</param>
    private void Log(LogLevel level, string message, Exception exception)
    {
        if (!IsEnabled(level)) return;
        Write(level, message, exception);
    }

    #endregion

    /// <summary>
    /// 平台输出入口，由具体实现负责真正的日志写入。
    /// </summary>
    /// <param name="level">日志级别</param>
    /// <param name="message">日志消息</param>
    /// <param name="exception">异常对象（可为null）</param>
    protected abstract void Write(LogLevel level, string message, Exception? exception);
}