using Serilog;
using Serilog.Events;

namespace Avalonia_Common.Infrastructure
{
    /// <summary>
    /// Serilog 日志配置 —— 可在 Avalonia-API 和 Avalonia-PC 中共享。
    /// </summary>
    public static class LoggingConfiguration
    {
        /// <summary>
        /// 默认日志目录
        /// </summary>
        private static readonly string DefaultLogDir = Path.Combine(AppContext.BaseDirectory, "logs");

        /// <summary>
        /// 创建控制台日志记录器（开发环境）。
        /// </summary>
        public static ILogger CreateConsoleLogger(
            LogEventLevel minimumLevel = LogEventLevel.Debug)
        {
            return new LoggerConfiguration()
                .MinimumLevel.Is(minimumLevel)
                .Enrich.FromLogContext()
                .WriteTo.Console(
                    outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj}{NewLine}{Exception}")
                .CreateLogger();
        }

        /// <summary>
        /// 创建控制台 + 文件日志记录器。
        /// </summary>
        /// <param name="minimumLevel">最低日志级别</param>
        /// <param name="logDir">日志目录，默认 ./logs</param>
        /// <param name="retainedDays">保留天数</param>
        public static ILogger CreateDefaultLogger(
            LogEventLevel minimumLevel = LogEventLevel.Information,
            string? logDir = null,
            int retainedDays = 30)
        {
            logDir ??= DefaultLogDir;

            return new LoggerConfiguration()
                .MinimumLevel.Is(minimumLevel)
                //.MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
                //.MinimumLevel.Override("System", LogEventLevel.Warning)
                .Enrich.FromLogContext()
                .Enrich.WithMachineName()
                .Enrich.WithThreadId()
                .WriteTo.Console(
                    outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj}{NewLine}{Exception}")
                .WriteTo.File(
                    path: Path.Combine(logDir, "log-.txt"),
                    rollingInterval: RollingInterval.Day,
                    retainedFileCountLimit: retainedDays,
                    outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj}{NewLine}{Exception}",
                    encoding: System.Text.Encoding.UTF8)
                .CreateLogger();
        }

        /// <summary>
        /// 创建只写文件的日志记录器（桌面应用静默模式）。
        /// </summary>
        public static ILogger CreateFileOnlyLogger(
            LogEventLevel minimumLevel = LogEventLevel.Information,
            string? logDir = null,
            int retainedDays = 30)
        {
            logDir ??= DefaultLogDir;

            return new LoggerConfiguration()
                .MinimumLevel.Is(minimumLevel)
                .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
                .Enrich.FromLogContext()
                .WriteTo.File(
                    path: Path.Combine(logDir, "app-.txt"),
                    rollingInterval: RollingInterval.Day,
                    retainedFileCountLimit: retainedDays,
                    outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj}{NewLine}{Exception}",
                    encoding: System.Text.Encoding.UTF8)
                .CreateLogger();
        }
    }

    /// <summary>
    /// 静态日志访问器 —— 全局静态入口，方便在没有 DI 的场景下使用。
    /// </summary>
    public static class AppLog
    {
        /// <summary>
        /// 保存全局日志记录器实例。
        /// </summary>
        private static ILogger? _logger;

        /// <summary>
        /// 初始化全局日志记录器。
        /// </summary>
        public static void Initialize(ILogger logger)
        {
            _logger = logger;
            Log.Logger = logger;
        }

        /// <summary>
        /// 获取全局日志记录器。若未初始化则回退到 Serilog.Log.Logger。
        /// </summary>
        public static ILogger Logger => _logger ?? Log.Logger;

        /// <summary>
        /// 写入 Debug 级别日志。
        /// </summary>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Debug(string messageTemplate, params object?[] propertyValues)
            => Logger.Debug(messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Information 级别日志。
        /// </summary>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Information(string messageTemplate, params object?[] propertyValues)
            => Logger.Information(messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Warning 级别日志。
        /// </summary>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Warning(string messageTemplate, params object?[] propertyValues)
            => Logger.Warning(messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Error 级别日志。
        /// </summary>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Error(string messageTemplate, params object?[] propertyValues)
            => Logger.Error(messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Error 级别日志，并附带异常信息。
        /// </summary>
        /// <param name="exception">异常对象。</param>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Error(Exception exception, string messageTemplate, params object?[] propertyValues)
            => Logger.Error(exception, messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Fatal 级别日志。
        /// </summary>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Fatal(string messageTemplate, params object?[] propertyValues)
            => Logger.Fatal(messageTemplate, propertyValues);

        /// <summary>
        /// 写入 Fatal 级别日志，并附带异常信息。
        /// </summary>
        /// <param name="exception">异常对象。</param>
        /// <param name="messageTemplate">消息模板。</param>
        /// <param name="propertyValues">属性值。</param>
        public static void Fatal(Exception exception, string messageTemplate, params object?[] propertyValues)
            => Logger.Fatal(exception, messageTemplate, propertyValues);
    }
}