using Godot;

public partial class UIHandler : Control
{
	[Export] CodingWindow codingWindow;
	[Export] RobotList robotList;
	[Export] Camera3d mainCam;
	[Export] Map map;
	[Export] RichTextLabel FPS;
	[Export] RichTextLabel RAM;
	[Export] PanelContainer options;
	[Export] Control uiContent;
	[Export] PanelContainer menu;
	[Export] PanelContainer inventory;
	[Export] ResearchList researchList;
	[Export] TextureRect robotAlarm;
	[Export] RichTextLabel energyLabel;
	[Export] RichTextLabel waterLabel;
	[Export] RichTextLabel hungerLabel;
	[Export] RichTextLabel survivalStatus;
	[Export] RichTextLabel currentLayer;
	[Export] RichTextLabel deepestLayer;
	[Export] Button unlockLayer;
	[Export] PanelContainer gameOver;


	private bool receivedRobotJumpSignal = false;
	private bool receivedRobotFollowSignal = false;
	public override void _Ready()
	{
		UIStyle.Apply(this);
		robotList.OnRobotJumpTo += OnRobotJumpTo;
		robotList.OnRobotFollow += OnRobotFollow;
	}

	public override void _ExitTree()
	{
		robotList.OnRobotJumpTo -= OnRobotJumpTo;
		robotList.OnRobotFollow -= OnRobotFollow;
	}

	public override void _Process(double delta)
	{
		DisplayStats();
		DisplayRobotAlarm();

		if (IsTextInputFocused()) return;

		if (Input.IsActionJustPressed("map")) HandleMapButton();
		if (Input.IsActionJustPressed("menu")) HandleMenuButton();
		if (Input.IsActionJustPressed("robot_list")) HandleRobotListButton();
		if (Input.IsActionJustPressed("inventory")) HandleInventoryButton();
		if (Input.IsActionJustPressed("research")) HandleResearchButton();
	}

	private bool IsTextInputFocused()
	{
		Control focused = GetViewport().GuiGetFocusOwner();
		return focused is LineEdit || focused is TextEdit;
	}

	public void HandleMenuButton()
	{
		if (GameData.survival.isDead) return;

		OpenUIElement(menu);
		GameData.isPaused = menu.Visible || options.Visible;
	}

	public void HandleMenu()
	{
		HandleMenuButton();
	}

	public void ShowOptions()
	{
		if (GameData.survival.isDead) return;

		menu.Hide();
		OpenUIElement(options);
		GameData.isPaused = options.Visible;
	}

	public void HandleMapButton()
	{
		if (GameData.survival.isDead) return;

		OpenUIElement(map);
		if (map.Visible) map.ShowMap();
	}

	public void HandleRobotListButton()
	{
		if (GameData.survival.isDead) return;

		receivedRobotFollowSignal = false;
		receivedRobotJumpSignal = false;
		OpenUIElement(robotList);
	}

	public void HandleInventoryButton()
	{
		if (GameData.survival.isDead) return;

		OpenUIElement(inventory);
	}

	public void HandleResearchButton()
	{
		if (GameData.survival.isDead) return;

		OpenUIElement(researchList);
		if (researchList.Visible) researchList.SetupGraph();
	}

	public void ExitGame()
	{
		GetTree().ChangeSceneToFile("res://Scenes/MainMenu.tscn");
	}

	public void SaveGame()
	{
		SaveGameManager.SaveGame();
	}

	public void LoadGame()
	{
		if (!SaveGameManager.SaveExists()) return;

		GameData.loadSaveOnStart = true;
		GetTree().ChangeSceneToFile("res://Scenes/Game.tscn");
	}

	public void OpenUIElement(Control element)
	{
		SoundManager.PlayButton();
		element.Visible = !element.Visible;
		HideUIElements(element);
	}

	private void HideUIElements(Control element)
	{
		foreach (PanelContainer child in uiContent.GetChildren())
		{
			if (child == element) continue;
			child.Visible = false;
		}

		if (element != menu && element != options)
		{
			GameData.isPaused = false;
		}
	}

	private void OnRobotJumpTo(Robot robot)
	{
		if (receivedRobotJumpSignal) return;

		receivedRobotJumpSignal = true;
		mainCam.Position = new Vector3(robot.Position.X, mainCam.Position.Y, robot.Position.Z + 3f);
		codingWindow.SetRobot(robot);
		OpenUIElement(codingWindow);
	}

	private void OnRobotFollow(Robot robot)
	{
		if (receivedRobotFollowSignal) return;

		receivedRobotFollowSignal = true;
		mainCam.Follow(robot);
	}

	public void UnlockLayer()
	{
		if (GameData.inventory.CanCraft(GameData.map[GameData.lowestLayer].gateIngredients, 1))
		{
			int openedLayer = GameData.lowestLayer;
			foreach (Ingredient ingredient in GameData.map[GameData.lowestLayer].gateIngredients)
			{
				GameData.inventory.RemoveItem(ingredient.Item, ingredient.Amount);
			}
			GameData.lowestLayer++;
			World world = GetNodeOrNull<World>("/root/Main/World");
			if (world != null)
			{
				world.OpenGate(openedLayer);
			}
			if (GameData.lowestLayer == GameData.ruinSize)
			{
				gameOver.Show();
			}
		}
	}

}