using Cryville.Common.Unity;
using Cryville.Common.Unity.UI;
using Cryville.Crtr.UI;
using System;
using System.Collections.Generic;
using UnityEngine;

namespace Cryville.Crtr.Browsing.UI {
	public class PathedResourceBrowser : ResourceBrowser {
		public IPathedResourceManager<ChartDetail> ResourceManager;
		public ScrollableItemGrid ItemContainer;

		readonly HashSet<int> _selectedItems = new HashSet<int>();
		readonly Dictionary<int, BrowserItem> _items = new Dictionary<int, BrowserItem>();

		FileDialog _dialog;

		protected virtual void Start() {
			ItemContainer.LoadItem = LoadItem;
			ResourceManager.ItemChanged += OnItemChanged;
			ResourceManager.ChangeDirectory(new string[] { "" });
			InitDialog();
		}

		protected void InitDialog() {
			_dialog = Instantiate(Resources.Load<GameObject>("Common/FileDialog")).GetComponent<FileDialog>();
			_dialog.gameObject.SetActive(false);
			_dialog.Filter = ResourceManager.GetSupportedFormats();
			_dialog.PresetPaths = ResourceManager.GetPresetPaths();
			_dialog.OnClose += OnAddDialogClosed;
		}

		void OnItemChanged() {
			ItemContainer.ItemCount = ResourceManager.Count;
			_selectedItems.Clear();
			_items.Clear();
		}

		private bool LoadItem(int id, GameObject obj) {
			var bi = obj.GetComponent<BrowserItem>();
			_items[id] = bi;
			try {
				var item = ResourceManager[id];
				bi.Load(id, item, _selectedItems.Contains(id));
			}
			catch (Exception) {
				bi.Load(id, default(ChartDetail), _selectedItems.Contains(id));
			}
			return true;
		}

		public virtual void OnDirectoryItemClicked(int id) {
			ResourceManager.OpenDirectory(id);
		}

		public void OnObjectItemClicked(int id) {
			foreach (var item in _selectedItems) _items[item].OnDeselect();
			_selectedItems.Clear();
			_items[id].OnSelect();
			_selectedItems.Add(id);
			Master.ShowDetail(id, ResourceManager[id]);
		}

		public void OnPathClicked(int id) {
			ResourceManager.ReturnToDirectory(id);
		}

		public void OnAddButtonClicked() {
			_dialog.Show();
		}

		private void OnAddDialogClosed() {
			if (_dialog.FileName == null) return;
			if (ResourceManager.ImportItemFrom(new Uri(_dialog.FileName))) {
				Popup.Create("Import succeeded");
				OnPathClicked(ResourceManager.CurrentDirectory.Length - 1);
			}
			else {
				Popup.Create("Import failed");
			}
		}
	}
}