using Cryville.Common.Unity;
using Cryville.Common.Unity.UI;
using Cryville.Crtr.Browsing.Actions;
using Cryville.Crtr.UI;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Cryville.Crtr.Browsing.UI {
	public class PathedResourceBrowser : ResourceBrowser {
		[SerializeField]
		ScrollableItemGrid m_itemContainer;
		[SerializeField]
		DetailPanel m_detailPanel;
		[SerializeField]
		GameObject m_actionBar;

		IPathedResourceManager<ChartDetail> _manager;
		IResourceAction _importAction;

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

		[Obsolete]
		FileDialog _dialog;

		protected virtual void Start() {
			m_itemContainer.LoadItem = LoadItem;
			InitDialog();
		}
		void OnDestroy() {
			UnregisterManager();
		}
		void UnregisterManager() {
			Master.Actions.Unregister(_importAction);
			_manager.ItemChanged -= OnItemChanged;
			_manager.DirectoryChanged -= OnDirectoryChanged;
		}

		void OnEnable() {
			_manager.Activate();
		}
		void OnDisable() {
			_manager.Deactivate();
		}

		public void Init(ResourceBrowserMaster master, IPathedResourceManager<ChartDetail> manager) {
			if (_manager != null) {
				UnregisterManager();
			}
			Init(master);
			_manager = manager;
			_manager.ItemChanged += OnItemChanged;
			_manager.DirectoryChanged += OnDirectoryChanged;
			Master.Actions.Register(_importAction = new ImportResourceAction(_manager));

			OnItemChanged();
			OnDirectoryChanged();
		}

		bool _itemChanged;
		void OnItemChanged() {
			_itemChanged = true;
		}
		void OnDirectoryChanged() {
		}
		void Update() {
			if (_itemChanged) {
				_itemChanged = false;
				_selectedItems.Clear();
				_items.Clear();
				m_itemContainer.ItemCount = _manager.Count;
			}
		}

		private bool LoadItem(int id, GameObject obj) {
			var bi = obj.GetComponent<BrowserItem>();
			_items[id] = bi;
			try {
				var item = _manager[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) {
			_manager.OpenDirectory(id);
		}

		public void OnObjectItemClicked(int id) {
			foreach (var item in _selectedItems) _items[item].OnDeselect();
			_selectedItems.Clear();
			_items[id].OnSelect();
			_selectedItems.Add(id);
			m_detailPanel.Load(_manager[id]);
			m_actionBar.SetActive(true);
		}

		public void OnPathClicked(int index) {
			_manager.ReturnToDirectory(index);
		}

		[Obsolete]
		public void OnAddButtonClicked() {
			_dialog.Show();
		}

		[Obsolete]
		private void OnAddDialogClosed() {
			if (_dialog.FileName == null) return;
			if (ResourceManager.ImportItemFrom(new Uri(_dialog.FileName))) {
				Popup.Create("Import succeeded");
			}
			else {
				Popup.Create("Import failed");
			}
		}
	}
}