Add configuration management and default settings

using System.Collections.Generic;

namespace WatermarkClock

{

    public class AppConfig

    {

        public MarkPosition MarkPosition { get; set; } = MarkPosition.TopRight;

        public int Padding { get; set; } = 16;

        public double FontSize { get; set; } = 28;

        public string FontFamily { get; set; } = "Microsoft YaHei UI";

        public string TextColor { get; set; } = "#FFFFFF";

        public int RefreshInterval { get; set; } = 16;

        public List<TemplateConfig> Templates { get; set; } = new List<TemplateConfig>();

    }

    public class TemplateConfig

    {

        public string Text { get; set; } = "{DatetimeF}";

        public int DurationSeconds { get; set; } = 10;

    }

}

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using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using Newtonsoft.Json;

namespace WatermarkClock

{

    public static class ConfigManager

    {

        private static readonly string DefaultConfigFileName = "WatermarkClock.json";

        /// <summary>

        /// 获取默认配置文件路径（程序目录下）

        /// </summary>

        public static string GetDefaultConfigPath()

        {

            var appDir = AppDomain.CurrentDomain.BaseDirectory;

            return Path.Combine(appDir, DefaultConfigFileName);

        }

        /// <summary>

        /// 从命令行参数获取配置文件路径，若未指定则返回默认路径

        /// </summary>

        public static string GetConfigPathFromArgs()

        {

            var args = Environment.GetCommandLineArgs();

            for (int i = 0; i < args.Length - 1; i++)

            {

                if (args[i] == "--cfg" || args[i] == "-c")

                {

                    return args[i + 1];

                }

            }

            return GetDefaultConfigPath();

        }

        /// <summary>

        /// 加载配置文件，若不存在则返回默认配置并写入文件

        /// </summary>

        public static AppConfig LoadOrCreate(string path)

        {

            if (File.Exists(path))

            {

                try

                {

                    var json = File.ReadAllText(path);

                    var config = JsonConvert.DeserializeObject<AppConfig>(json);

                    if (config != null)

                        return config;

                }

                catch { }

            }

            var defaultConfig = CreateDefault();

            Save(path, defaultConfig);

            return defaultConfig;

        }

        /// <summary>

        /// 创建默认配置

        /// </summary>

        public static AppConfig CreateDefault()

        {

            return new AppConfig

            {

                MarkPosition = MarkPosition.TopRight,

                Padding = 16,

                FontSize = 28,

                FontFamily = "Microsoft YaHei UI",

                TextColor = "#FFFFFF",

                RefreshInterval = 16,

                Templates = new List<TemplateConfig>

                {

                    new TemplateConfig { Text = "{DatetimeF}", DurationSeconds = 10 }

                }

            };

        }

        /// <summary>

        /// 保存配置到文件

        /// </summary>

        public static void Save(string path, AppConfig config)

        {

            var json = JsonConvert.SerializeObject(config, Formatting.Indented);

            File.WriteAllText(path, json);

        }

        /// <summary>

        /// 从 AppConfig 转换为 Context

        /// </summary>

        public static void ApplyToContext(AppConfig config, Context ctx)

        {

            ctx.MarkPosition = config.MarkPosition;

            ctx.Padding = config.Padding;

            ctx.FontSize = config.FontSize;

            ctx.FontFamily = new System.Windows.Media.FontFamily(config.FontFamily);

            ctx.TextColor = config.TextColor;

            ctx.RefreshInterval = config.RefreshInterval;

            ctx.Templates.Clear();

            foreach (var t in config.Templates)

            {

                ctx.Templates.Add(new TemplateItem(t.Text, t.DurationSeconds));

            }

        }

        /// <summary>

        /// 从 Context 转换为 AppConfig

        /// </summary>

        public static AppConfig FromContext(Context ctx)

        {

            return new AppConfig

            {

                MarkPosition = ctx.MarkPosition,

                Padding = ctx.Padding,

                FontSize = ctx.FontSize,

                FontFamily = ctx.FontFamily.Source,

                TextColor = ctx.TextColor,

                RefreshInterval = ctx.RefreshInterval,

                Templates = ctx.Templates.Select(t => new TemplateConfig

                {

                    Text = t.Text,

                    DurationSeconds = t.DurationSeconds

                }).ToList()

            };

        }

    }

}

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