using Godot;
using System;

public partial class Ball : RigidBody2D
{
	[Signal]
	public delegate void HoverEventHandler(bool tf = true);
	[Signal]
	public delegate void SelectEventHandler(bool tf = true);
	[Signal]
	public delegate void AimEventHandler(bool tf = true);
	[Signal]
	public delegate void LaunchEventHandler(bool tf = true);
	[Signal]
	public delegate void MoveEventHandler(bool tf = true);
	[Signal]
	public delegate void BumpMarbleEventHandler(Ball ball);
	[Signal]
	public delegate void DefenseDownEventHandler(int damage);
	
	public bool _holding, _placed, _hovered, _selected, _aimed, _launched, _moving;
	public int _defense, _defenseMax, _speed;
	public Vector2 _force, _velocity, _screenSize;

	
	public override void _Ready()
	{
		_holding = false;
		_placed = false;
		_hovered = false;
		_selected = false;
		_aimed = false;
		_launched = false;
		_moving = false;
		_defense = 10;
		_defenseMax = _defense;
		_speed = 400;
		_force = new Vector2(0,0);
		_velocity = new Vector2(0,0);
		_screenSize = GetViewportRect().Size;
		
		Hide();
	}
	
	public override void _PhysicsProcess(double delta) //THIS IS LIKE THE UPDATE FUNCTION
	{
		Rotation = 0;
		if (_placed)
		{
			TrySelect();
			TryAim();
			TryLaunch();
			TryMovement(delta);
		}
		else if (_holding)
		{
			//GetNode<CollisionShape2D>("Bounds").Disabled = true;
			Vector2 mousePosition = GetGlobalMousePosition();
			if (Input.IsActionJustReleased("left_click"))
			{
				Start(mousePosition);
			}
		}
	}
	
	public void DefenseChange(int change)
	{
		_defense += change;
		if (_defense < 0)
		{
			EmitSignal(SignalName.DefenseDown); // transfer damage over 0 to player
			_defense = 0; // set defense back to 0
		}
	}
	
	public void Start(Vector2 position)
	{
		
		_holding = false;
		_placed = true;
		Position = position;
		Show();
		GetNode<CollisionShape2D>("Bounds").Disabled = false;
	}
	
	public void TryAim()
	{
		if (_selected && Input.IsActionPressed("left_click") && ! _hovered && !_aimed)
		{
			_aimed = true;
			EmitSignal(SignalName.Aim);
		}
		
		if (_aimed)
		{
			Vector2 mousePosition = GetGlobalMousePosition();
			_force = Position - mousePosition;
			
			if (!Input.IsActionPressed("left_click"))
			{
				if (!_hovered)
				{
					_launched = true;
					EmitSignal(SignalName.Select, false);
				}
				else
				{
					_aimed = false;
					EmitSignal(SignalName.Aim, false);
				}
			}
		}
	}
	
	public void TryLaunch()
	{
		if (_aimed && Input.IsActionJustReleased("left_click"))
		{
			_selected = false;
			EmitSignal(SignalName.Select, false);
			
			_aimed = false;
			EmitSignal(SignalName.Aim, false);
			
			_launched = true;
			EmitSignal(SignalName.Launch);
			
			ApplyCentralForce(_force * _speed);
			_force = Vector2.Zero;
		}
	}
	
	public void TryMovement(double delta)
	{
		if (LinearVelocity.Length() > 0 && !Sleeping)
		{
			if (!_moving)
			{
				_moving = true;
				EmitSignal(SignalName.Move);
			}
		}
		if (_moving)
		{			
			//Vector2 Scroll = -LinearVelocity / 100;
//
			//Sprite2D sprite = (Sprite2D)GetNode("Texture");
			//ShaderMaterial material = (ShaderMaterial)sprite.Material;
			//
			//float CurrentScrollX = (float)material.GetShaderParameter("scroll_x");
			//material.SetShaderParameter("scroll_x", (CurrentScrollX + Scroll.X * (float)delta) % 1.0f);
			//
			//float CurrentScrollY = (float)material.GetShaderParameter("scroll_y");
			//material.SetShaderParameter("scroll_y", (CurrentScrollY + Scroll.Y * (float)delta) % 1.0f);
			
			
			if (Sleeping)
			{
				_launched = false;
				_moving = false;
				EmitSignal(SignalName.Move, false);
			}
		}
	}
	
	public void TrySelect()
	{
		if ( _hovered)
		{
			if (Input.IsActionJustPressed("left_click") && !_selected)
			{
				_selected = true;
				EmitSignal(SignalName.Select);
			}
		}
		
		if (_selected)
		{
			if (!_hovered)
			{
				if (Input.IsActionJustPressed("left_click") && _selected)
				{
					_selected = false;
					EmitSignal(SignalName.Select, false);
				}
			}
		}
	}
	
	private void OnMouseEntered()
	{
		 _hovered = true;
		EmitSignal(SignalName.Hover);
	}
	
	private void OnMouseExited()
	{
		 _hovered = false;
		EmitSignal(SignalName.Hover, false);
	}
	
	private void OnBodyEntered(Node2D body)
	{
		if (body.GetType() == typeof(Ball))
		{
			EmitSignal(SignalName.BumpMarble, (Ball)body);
		}
	}
}