using Godot;
using System.Collections.Generic;
using Newlon.Components.Zombies;
using Godot.Collections;
using Newlon.Resources;

namespace Newlon.Components.Level;

[GlobalClass]
public partial class RowSpawner : Node2D
{
	private Queue<RowSpawn> queue = [];
	[Export] private Timer delayTimer;
	[Export] private LevelRunner runner;

    public override void _Ready()
	{
		delayTimer.Timeout += FormSquad;
	}

	private void FormSquad()
	{
		if (queue.Count == 0) return;

		var row = queue.Dequeue();

		for (int i = 0; i < row.zombies.Count; i++)
		{
			if (row.zombies[i] != null)
				Spawn(row.zombies[i], i+1);
		}

		if (queue.Count == 0) delayTimer.Stop();
	}

	private void Spawn(ZombieResource resource, int lane)
	{
		RuntimeZombieData zombie = resource.Scene.Instantiate<RuntimeZombieData>();
		PoolContainer.Instance.Zombies.AddChild(zombie);

		zombie.GlobalPosition = new Vector2(GlobalPosition.X, FieldParams.LeftFieldBoundary.Y + lane * FieldParams.TileHeight);
		runner.AddZombie(zombie);
	}

	public void Add(Array<RowSpawn> rowSpawns)
	{
		foreach (var spawn in rowSpawns)
		{
			queue.Enqueue(spawn);
		}

		delayTimer.Start();
	}
}