using System.Text.Json;
using System.IO;

namespace ShortcutsHelper.Models
{
    public class AppSettings
    {
        public Dictionary<string, ApplicationWindowSettings> ApplicationSettings { get; set; } = new();
    }

    public class ApplicationWindowSettings
    {
        public double Left { get; set; } = 100;
        public double Top { get; set; } = 100;
        public double Width { get; set; } = 400;
        public double Height { get; set; } = 300;
        public double FavoriteColumnWidth { get; set; } = 40;
        public double ShortcutColumnWidth { get; set; } = 140;
        public double DescriptionColumnWidth { get; set; } = 200;
    }

    public static class SettingsManager
    {
        private static readonly string SettingsPath = Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
            "ShortcutsHelper",
            "app-settings.json");

        private static AppSettings? _settings;

        public static AppSettings LoadSettings()
        {
            if (_settings != null)
                return _settings;

            try
            {
                if (File.Exists(SettingsPath))
                {
                    var json = File.ReadAllText(SettingsPath);
                    _settings = JsonSerializer.Deserialize<AppSettings>(json) ?? new AppSettings();
                }
                else
                {
                    _settings = new AppSettings();
                }
            }
            catch
            {
                _settings = new AppSettings();
            }

            return _settings;
        }

        public static void SaveSettings(AppSettings settings)
        {
            try
            {
                var dir = Path.GetDirectoryName(SettingsPath);
                if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
                    Directory.CreateDirectory(dir);

                var json = JsonSerializer.Serialize(settings, new JsonSerializerOptions { WriteIndented = true });
                File.WriteAllText(SettingsPath, json);
                _settings = settings;
            }
            catch
            {
                // Ignorar errores al guardar
            }
        }

        public static ApplicationWindowSettings GetApplicationSettings(string applicationName)
        {
            var settings = LoadSettings();
            
            if (!settings.ApplicationSettings.ContainsKey(applicationName))
            {
                // Configuración por defecto para aplicaciones nuevas
                settings.ApplicationSettings[applicationName] = new ApplicationWindowSettings
                {
                    Left = 100,
                    Top = 100,
                    Width = 400,
                    Height = 300,
                    FavoriteColumnWidth = 40,
                    ShortcutColumnWidth = 140,
                    DescriptionColumnWidth = 200
                };
                SaveSettings(settings);
            }

            return settings.ApplicationSettings[applicationName];
        }

        public static void SaveApplicationSettings(string applicationName, ApplicationWindowSettings appSettings)
        {
            var settings = LoadSettings();
            settings.ApplicationSettings[applicationName] = appSettings;
            SaveSettings(settings);
        }
    }
}