using Godot;
using System;
using Movementtests.interfaces;

[GlobalClass]
public partial class FlyingEnemy : CharacterBody3D, IDamageable, IKillable, IKnockbackable
{
	[Export]
	public Node3D Target { get; set; }
	
	[Export]
	public FlyingEnemyInputs Inputs;
	
	private RayCast3D _groundDistanceRaycast;
	private Area3D _damageBox;
	
	private bool _movingToDesiredHeight = true;
	private Vector3 _randomDirection;
	
	public override void _Ready()
	{
		_groundDistanceRaycast = GetNode<RayCast3D>("GroundDistance");
		_groundDistanceRaycast.TargetPosition = new Vector3(0, -Inputs.TargetHeight, 0);
		
		_damageBox = GetNode<Area3D>("DamageBox");
		_damageBox.BodyEntered += OnDamageBoxTriggered;
		
		_randomDirection = new Vector3(GD.RandRange(-1, 1), 1, GD.RandRange(-1, 1)).Normalized();
	}

	public void OnDamageBoxTriggered(Node3D body)
	{
		if(body is IDamageable damageable) damageable.TakeDamage();
	}

	public override void _PhysicsProcess(double delta)
	{
		var target = Target.GlobalPosition;
		var direction = (target - GlobalPosition).Normalized();
		Vector3 velocity = Velocity;
		
		var targetPlane = new Vector3(target.X, GlobalPosition.Y, target.Z);
		LookAt(targetPlane);
		
		// Check if we have a direct line of sight to the player
		if (!_movingToDesiredHeight)
		{
			velocity = direction * Inputs.Speed;
			
			var spaceState = GetWorld3D().DirectSpaceState;
			var query = PhysicsRayQueryParameters3D.Create(GlobalPosition, target, _groundDistanceRaycast.CollisionMask);
			var result = spaceState.IntersectRay(query);
			if (result.Count > 0)
			{
				_movingToDesiredHeight = true;
				_randomDirection = new Vector3(GD.RandRange(-1, 1), 1, GD.RandRange(-1, 1)).Normalized();
			}
		}
		else
		{
			velocity = _randomDirection * Inputs.Speed;
			
			if (!_groundDistanceRaycast.IsColliding())
			{
				velocity.Y = 0;
			
				var spaceState = GetWorld3D().DirectSpaceState;
				var query = PhysicsRayQueryParameters3D.Create(GlobalPosition, target, _groundDistanceRaycast.CollisionMask);
				var result = spaceState.IntersectRay(query);
				if (result.Count == 0)
				{
					_movingToDesiredHeight = false;
				}
			}
		}
		
		Velocity = velocity;
		MoveAndSlide();
	}

	public void TakeDamage()
	{
		GD.Print("Oh no I'm falling");
	}
}