using Godot;
using System;

public partial class Blorbo : CharacterBody2D
{
	public const float TerminalVelocity = 500.0f; // Max falling speed
	public const float Speed = 60.0f;
	public const float JumpVelocity = -160.0f;
	public const float Acceleration = 400.0f; // How much we speed up/second
	public const float Decelleration = 400.0f; // Slow down/second
	public const float AirFrictionMultiplier = 0.2f; // How much less control and speedup we have in the air
	
	public override void _PhysicsProcess(double delta)
	{
		Vector2 velocity = Velocity;

		// Add the gravity.
		if (!IsOnFloor())
		{
			velocity += GetGravity() * (float)delta;
			velocity.Y = Math.Min(TerminalVelocity, velocity.Y);
		}

		// Handle Jump.
		if (Input.IsActionJustPressed("ui_accept") && IsOnFloor())
		{
			velocity.Y = JumpVelocity;
		}

		// Get the input direction and handle the movement/deceleration.
		// As good practice, you should replace UI actions with custom gameplay actions.
		Vector2 direction = Input.GetVector("ui_left", "ui_right", "ui_up", "ui_down");
		float friction_multiplier = 1.0f * getFloorFriction();
		if (!IsOnFloor()){
			friction_multiplier *= AirFrictionMultiplier;
		}
		if (direction != Vector2.Zero)
		{
			velocity.X += direction.X * Acceleration * (float)delta * friction_multiplier;
			velocity.X = Math.Min(Speed, velocity.X);
		}
		else
		{
			
			velocity.X = Mathf.MoveToward(Velocity.X, 0, Decelleration * (float)delta * friction_multiplier);
		}

		Velocity = velocity;
		MoveAndSlide();
	}
	
	private float getFloorFriction() {
		Marker2D floorCheck = GetNode<Marker2D>("FloorCheck");
		Vector2 checkedPosition = floorCheck.GlobalPosition;
		GD.Print(checkedPosition);
		
		for (int i = 0; i < GetSlideCollisionCount(); i++)
		{
			var collision = GetSlideCollision(i);
			var collider = collision.GetCollider();
			if (collider is TileMapLayer tileMap)
			{
				TileData data = tileMap.GetCellTileData(
								tileMap.LocalToMap(
								tileMap.ToLocal(checkedPosition)));
				GD.Print(collider.ToString());
				if (data != null)
				{
					return (float)data.GetCustomData("frictionMul");
				}
			}
		}
		return 1.0f;
	}
}