using Godot;
using KeepersCompound.LGS;

namespace KeepersCompound.TMV.UI;

public partial class ResourceSelector : Control

{
	public event ResourceSelectedEventHandler ResourceSelected;
	public delegate void ResourceSelectedEventHandler(string campaign, string resource);

	[Export]
	public ResourceType ResType;

	private FileDialog _FolderSelect;
	private LineEdit _FolderPath;
	private Button _BrowseButton;
	private ItemList _Campaigns;
	private ItemList _Resources;
	private Button _LoadButton;
	private Button _CancelButton;

	public override void _Ready()
	{
		// TODO: Load initial folderpath from config and prefil everything
		_FolderSelect = GetNode<FileDialog>("%FolderSelect");
		_FolderPath = GetNode<LineEdit>("%FolderPath");
		_BrowseButton = GetNode<Button>("%BrowseButton");
		_Campaigns = GetNode<ItemList>("%Campaigns");
		_Resources = GetNode<ItemList>("%Resources");
		_LoadButton = GetNode<Button>("%LoadButton");
		_CancelButton = GetNode<Button>("%CancelButton");

		_BrowseButton.Pressed += () => _FolderSelect.Visible = true;
		_FolderSelect.DirSelected += SetInstallPath;
		_FolderPath.TextSubmitted += SetInstallPath;
		_Campaigns.ItemSelected += BuildResourceList;
		_Resources.ItemSelected += (long _) => _LoadButton.Disabled = false;
		_LoadButton.Pressed += EmitResourceSelected;
		_CancelButton.Pressed += () => Visible = false;
	}

	public override void _Input(InputEvent @event)
	{
		if (@event is InputEventKey keyEvent && keyEvent.Pressed)
		{
			if (keyEvent.Keycode == Key.Escape)
			{
				Visible = !Visible;
			}
		}
	}

	private void SetInstallPath(string path)
	{
		_FolderPath.Text = path;
		if (Context.Instance.PathManager.Init(path))
		{
			BuildCampaignList();
		}
	}

	private void BuildCampaignList()
	{
		_Campaigns.Clear();
		_Resources.Clear();
		_LoadButton.Disabled = true;

		var pathManager = Context.Instance.PathManager;
		_Campaigns.AddItem("Original");
		foreach (var campaign in pathManager.GetCampaignNames())
		{
			_Campaigns.AddItem(campaign);
		}
	}

	private void BuildResourceList(long idx)
	{
		_Resources.Clear();
		_LoadButton.Disabled = true;

		var pathManager = Context.Instance.PathManager;
		var campaignName = idx == 0 ? null : _Campaigns.GetItemText((int)idx);
		var resourceNammes = pathManager.GetResourceNames(ResType, campaignName);
		foreach (var resource in resourceNammes)
		{
			_Resources.AddItem(resource);
		}
	}

	private void EmitResourceSelected()
	{
		var campaignIdxs = _Campaigns.GetSelectedItems();
		var resourceIdxs = _Resources.GetSelectedItems();
		if (campaignIdxs.IsEmpty() || resourceIdxs.IsEmpty())
		{
			return;
		}

		var campaignIdx = campaignIdxs[0];
		var resourceIdx = resourceIdxs[0];
		var campaignName = campaignIdx == 0 ? null : _Campaigns.GetItemText(campaignIdx);
		var resourceName = _Resources.GetItemText(resourceIdx);
		ResourceSelected(campaignName, resourceName);

		Visible = false;
	}
}