using Godot;
using System;
using System.Collections.Generic;
using System.Linq;
using fgj26.Scripts.Common;
using fgj26.Scripts.Helpers;

public partial class Turret : Node
{
    [Export] private Area2D _Attackrange;
    [Export] private float _fireRate;
    [Export] private Node2D _parent;
    [Export] private ProjectilePool _projectilePool;
    [Export] private AudioStreamPlayer2D _audio;
    private float _fireTimer = 0f;

    public int Level { get; private set; } = 1;
    public int UpgradeCost => 31 + (int)(31 * Math.Pow(Level, 1.75f));

    public float FireRate => _fireRate + (Level - 1) * 0.05f;
    public float Damage => 25 + (int)(10 + Math.Pow(Level, 1.5f));

    private HashSet<Enemy> _enemiesInRange = new HashSet<Enemy>();

    public void Upgrade()
    {
        Level++;
    }
    
    public override void _EnterTree()
    {
        _Attackrange.AreaEntered += EnemyEntered;
        _Attackrange.AreaExited += EnemyExited;
    }

    private void EnemyEntered(Area2D enemyHitBox)
    {
        if (enemyHitBox is EnemyArea earea)
        {
            _enemiesInRange.Add(earea.Enemy);
        }
    }

    private void EnemyExited(Area2D enemyHitBox)
    {
        if (enemyHitBox is EnemyArea earea)
        {
            _enemiesInRange.Remove(earea.Enemy);
        }
    }

    public override void _Process(double delta)
    {
        if (_enemiesInRange.Count == 0) return;
        _fireTimer += (float)delta;
        if (!(_fireTimer >= 1f / FireRate)) return;
        _fireTimer = 0;
        _audio?.SetPitchScale(RandomHelper.Float(0.8f, 1.2f));
        _audio?.Play();
        var t = Helpers.GetClosest(_parent,_enemiesInRange.ToArray());
        var dir = (t.GlobalPosition - _parent.GlobalPosition).Normalized();
        var proj = _projectilePool.Get();
        proj.Direction = dir;
        proj.Damage = Damage;
        proj.GlobalPosition = _parent.GlobalPosition;
        proj.Rotation = dir.Angle();
        ProjectileParent.Instance.AddChild(proj);
    }
}