using System;
using System.ComponentModel;
using System.ComponentModel.Composition;
using dnSpy.Contracts.MVVM;
using dnSpy.Contracts.Settings;

// Reads and writes the extension settings

namespace Example1.Extension {
	class MySettings : ViewModelBase {
		public bool BoolOption1 {
			get => boolOption1;
			set {
				if (boolOption1 != value) {
					boolOption1 = value;
					OnPropertyChanged(nameof(BoolOption1));
				}
			}
		}
		bool boolOption1 = true;

		public bool BoolOption2 {
			get => boolOption2;
			set {
				if (boolOption2 != value) {
					boolOption2 = value;
					OnPropertyChanged(nameof(BoolOption2));
				}
			}
		}
		bool boolOption2 = false;

		public string StringOption3 {
			get => stringOption3;
			set {
				if (stringOption3 != value) {
					stringOption3 = value;
					OnPropertyChanged(nameof(StringOption3));
				}
			}
		}
		string stringOption3 = string.Empty;

		public MySettings Clone() => CopyTo(new MySettings());

		public MySettings CopyTo(MySettings other) {
			other.BoolOption1 = BoolOption1;
			other.BoolOption2 = BoolOption2;
			other.StringOption3 = StringOption3;
			return other;
		}
	}

	// Export this class so it can be imported by other classes in this extension
	[Export(typeof(MySettings))]
	sealed class MySettingsImpl : MySettings {
		//TODO: Use your own guid
		static readonly Guid SETTINGS_GUID = new Guid("A308405D-0DF5-4C56-8B1E-8CE7BA6365E1");

		readonly ISettingsService settingsService;

		// Tell MEF to pass in the required ISettingsService instance exported by dnSpy
		[ImportingConstructor]
		MySettingsImpl(ISettingsService settingsService) {
			this.settingsService = settingsService;

			// Read the settings from the file or use the default values if our settings haven't
			// been saved to it yet.

			var sect = settingsService.GetOrCreateSection(SETTINGS_GUID);
			BoolOption1 = sect.Attribute<bool?>(nameof(BoolOption1)) ?? BoolOption1;
			BoolOption2 = sect.Attribute<bool?>(nameof(BoolOption2)) ?? BoolOption2;
			StringOption3 = sect.Attribute<string>(nameof(StringOption3)) ?? StringOption3;
			PropertyChanged += MySettingsImpl_PropertyChanged;
		}

		void MySettingsImpl_PropertyChanged(object? sender, PropertyChangedEventArgs e) {
			// Save the settings
			var sect = settingsService.RecreateSection(SETTINGS_GUID);
			sect.Attribute(nameof(BoolOption1), BoolOption1);
			sect.Attribute(nameof(BoolOption2), BoolOption2);
			sect.Attribute(nameof(StringOption3), StringOption3);
		}
	}
}