using Godot;
using System;

public partial class TouchControls : CanvasLayer
{
	public override void _Ready()
	{
		//if (OS.GetName() != "Android")
		//{
		//    QueueFree();
		//    return;
		//}
		SetButtonTextures();
		SetupButtonBindings();
		UpdateButtonPositions();
	}

	public override void _Process(double delta)
	{
		Vector2 dir = GetNode<Joystick>("Joystick").GetDirection();
		UpdateDirectionInput(dir);
	}

	private void SetButtonTextures()
	{
		string basePath = "res://Sprites/Menus/Mobile/";
		GetNode<TextureButton>("Buttons/ButtonZ").TextureNormal = GD.Load<Texture2D>(basePath + "ButtonZ.png");
		GetNode<TextureButton>("Buttons/ButtonX").TextureNormal = GD.Load<Texture2D>(basePath + "ButtonX.png");
		GetNode<TextureButton>("Buttons/ButtonC").TextureNormal = GD.Load<Texture2D>(basePath + "ButtonC.png");
	}

	private void SetupButtonBindings()
	{
		BindButton("Buttons/ButtonZ", "Confirm");
		BindButton("Buttons/ButtonX", "Cancel");
		BindButton("Buttons/ButtonC", "Menu");
	}

	private void BindButton(string path, string actionName)
	{
		var button = GetNode<TextureButton>(path);
		button.SelfModulate = new Color(1, 1, 1, 0.5f); // 使用 SelfModulate 替代 Modulate，适配所有主题

		button.Connect("pressed", Callable.From(() =>
		{
			Input.ActionPress(actionName);
			button.SelfModulate = new Color(1.3f, 1.3f, 1.3f, 1f); // 加亮并全不透明
		}));

		button.Connect("button_up", Callable.From(() =>
		{
			Input.ActionRelease(actionName);
			button.SelfModulate = new Color(1, 1, 1, 0.5f); // 半透明恢复
		}));
	}


	private void UpdateButtonPositions()
	{
		Vector2 viewportSize = GetViewport().GetVisibleRect().Size;

		SetButtonPosition("Buttons/ButtonZ", viewportSize, new Vector2(0.35f, 0.20f));
		SetButtonPosition("Buttons/ButtonX", viewportSize, new Vector2(0.25f, 0.35f));
		SetButtonPosition("Buttons/ButtonC", viewportSize, new Vector2(0.15f, 0.50f));
		
		var joystick = GetNode<Joystick>("Joystick");
		joystick.AnchorLeft = 0.0f;
		joystick.AnchorRight = 0.0f;
		joystick.AnchorTop = 1.0f;
		joystick.AnchorBottom = 1.0f;
		joystick.Position = new Vector2(0, 280); // 向右和向上偏移一些像素

	}

	private void SetButtonPosition(string path, Vector2 viewportSize, Vector2 offsetPercent)
	{
		var button = GetNode<TextureButton>(path);
		Vector2 finalPosition = new Vector2(
			viewportSize.X * (1 - offsetPercent.X),
			viewportSize.Y * (1 - offsetPercent.Y)
		);

		button.AnchorRight = 1;
		button.AnchorBottom = 1;
		button.AnchorLeft = 1;
		button.AnchorTop = 1;
		button.Position = finalPosition;
	}

	private void UpdateDirectionInput(Vector2 dir)
	{
		string[] actions = { "Left", "Right", "Up", "Down" };
		Vector2[] vectors = { Vector2.Left, Vector2.Right, Vector2.Up, Vector2.Down };
		const float thresholdDot = 0.7f;

		int selectedIndex = -1;
		float maxDot = -Mathf.Inf;

		for (int i = 0; i < actions.Length; i++)
		{
			float dot = dir.Dot(vectors[i]);
			if (dot > maxDot && dot > thresholdDot)
			{
				maxDot = dot;
				selectedIndex = i;
			}
		}

		for (int i = 0; i < actions.Length; i++)
		{
			if (i == selectedIndex)
				Input.ActionPress(actions[i]);
			else
				Input.ActionRelease(actions[i]);
		}
	}
}