using Godot;

namespace AceFieldNewHorizon.Scripts.Entities;

public partial class Bullet : Area2D
{
    [Export] public float Speed = 400.0f;
    [Export] public int Damage = 10;
    [Export] public float MaxDistance = 1000.0f;
    
    private Vector2 _direction = Vector2.Right;
    private Vector2 _startPosition;
    private float _distanceTraveled = 0f;
    private bool _hasHit = false;
    private uint _ignoreCollisionLayer = 0; // Layer to ignore (will be set by turret)

    public void Initialize(Vector2 direction, Vector2 position, float rotation, uint ignoreLayer = 0)
    {
        _direction = direction.Normalized();
        Position = position;
        Rotation = rotation;
        _startPosition = position;
        _ignoreCollisionLayer = ignoreLayer;
        
        // Connect the area entered signal
        BodyEntered += OnBodyEntered;
        AreaEntered += OnAreaEntered;
    }

    public override void _PhysicsProcess(double delta)
    {
        if (_hasHit) return;
        
        // Move the bullet
        var movement = _direction * Speed * (float)delta;
        Position += movement;
        _distanceTraveled += movement.Length();
        
        // Check if bullet has traveled max distance
        if (_distanceTraveled >= MaxDistance)
        {
            QueueFree();
            return;
        }
    }
    
    private void OnBodyEntered(Node2D body)
    {
        HandleCollision(body);
    }
    
    private void OnAreaEntered(Area2D area)
    {
        HandleCollision(area);
    }
    
    private void HandleCollision(Node2D node)
    {
        if (_hasHit) return;
        
        // Skip collision if it's on the ignore layer
        if (node is PhysicsBody2D physicsBody && 
            (physicsBody.CollisionLayer & _ignoreCollisionLayer) != 0)
        {
            return;
        }
        
        _hasHit = true;
        
        // If we hit an enemy, deal damage
        if (node is Enemy enemy)
        {
            // Get the global position where the bullet hit
            var hitPosition = GlobalPosition;
            enemy.TakeDamage(Damage, hitPosition);
        }
        
        // Optional: Add hit effect here
        // CreateHitEffect();
        
        // Remove the bullet
        QueueFree();
    }
    
    private void CreateHitEffect()
    {
        // You can add a hit effect here if desired
        // For example, a small explosion or impact sprite
    }
    
    public override void _ExitTree()
    {
        // Clean up signal connections
        BodyEntered -= OnBodyEntered;
        AreaEntered -= OnAreaEntered;
    }
}