using System;
using System.Collections.Generic;
using Gtk;
// ReSharper disable UnusedMember.Local
// ReSharper disable UnusedParameter.Local

namespace Buypeeb {
	internal class SettingsWindow : Window {
		private readonly List<Switch> generalSwitches = new List<Switch>();
		private readonly List<Entry> updateIntervalEntries = new List<Entry>();
		private readonly Settings settings;
		private readonly Builder builder;

		private readonly List<string> generalSwitchNames = new List<string> { "ShowSecondsInListView", "Autosave", "ShowFavouritesAtTopOfList" };
		private readonly List<string> updateIntervalEntryNames = new List<string> { "UpdateInterval", "UpdateIntervalCritical", "FavouriteUpdateInterval", "FavouriteUpdateIntervalCritical" };

		public SettingsWindow(Settings settings) : this(new Builder("settings.glade"), settings) { }

		private SettingsWindow(Builder builder, Settings settings) : base(builder.GetObject("WindowSettings").Handle) {
			Title = "Buypeeb - Settings";
			this.settings = settings;
			this.builder = builder;
			builder.Autoconnect(this);

			foreach (var name in generalSwitchNames) {
				var s = (Switch)builder.GetObject($"Switch{name}");
				generalSwitches.Add(s);
				s.Active = GetSetting<bool>(PropertyName(name));
			}

			foreach (var name in updateIntervalEntryNames) {
				var e = (Entry)builder.GetObject($"Entry{name}");
				updateIntervalEntries.Add(e);
				e.Text = GetSetting<int>(PropertyName(name)).ToString();
			}
		}

		private T GetSetting<T>(string property) {
			return (T)settings.GetType().GetProperty(property).GetValue(settings, null);
		}

		private void SetSetting<T>(string property, T value) {
			settings.GetType().GetProperty(property).SetValue(settings, value);
		}

		private string PropertyName(string property) {
			// replace "PropertyName" with "propertyName";
			return property[0].ToString().ToLower() + property.Substring(1);
		}

		private void ButtonSaveClicked(object sender, EventArgs args) {
			// first, validate all the intervals
			var failed = false;
			foreach (var name in updateIntervalEntryNames) {
				var e = (Entry)builder.GetObject($"Entry{name}");
				if (!int.TryParse(e.Text, out var result)) {
					failed = true;
				}
				else {
					if (result < 30 || result > 6000) {
						failed = true;
					}
				}

				if (!failed) {
					continue;
				}

				var md = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Ok, "Update intervals must be a whole number between 30 and 6000.");
				md.Run();
				md.Dispose();
				return;
			}

			// validation success!

			foreach (var name in updateIntervalEntryNames) {
				SetSetting(PropertyName(name), int.Parse(((Entry) builder.GetObject($"Entry{name}")).Text));
			}

			foreach (var name in generalSwitchNames) {
				SetSetting(PropertyName(name), ((Switch) builder.GetObject($"Switch{name}")).Active);
			}
			Dispose();
		}

		private void ButtonCancelClicked(object sender, EventArgs args) {
			Dispose();
		}
	}
}