using System;
using System.IO;
using System.Text.Json;
using Notify.Models;
using Notify.Serialization;

namespace Notify.Services;

/// <summary>
/// 加载/保存弹窗设置，并在变更时通知订阅者
/// </summary>
public sealed class SettingsService
{
    private static readonly string Dir =
        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "ClaudeCodeNotify");

    private static readonly string FilePath = Path.Combine(Dir, "settings.json");

    public ToastSettings Current { get; private set; } = new();

    /// <summary>
    /// 设置被保存后触发
    /// </summary>
    public event Action<ToastSettings>? Changed;

    public void Load()
    {
        try
        {
            if (File.Exists(FilePath))
            {
                var json = File.ReadAllText(FilePath);
                var loaded = JsonSerializer.Deserialize(json, AppJsonContext.Default.ToastSettings);
                if (loaded is not null)
                {
                    Current = loaded;
                }
            }
        }
        catch
        {
            // 配置损坏则回退到默认值，不影响保活
            Current = new ToastSettings();
        }
    }

    public void Save(ToastSettings settings)
    {
        Current = settings;
        try
        {
            Directory.CreateDirectory(Dir);
            var json = JsonSerializer.Serialize(settings, AppJsonContext.Default.ToastSettings);
            File.WriteAllText(FilePath, json);
        }
        catch
        {
            // 落盘失败不致命，内存里仍生效
        }

        Changed?.Invoke(Current);
    }
}