using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class WaveObserver : Singleton<WaveObserver>
{
    private List<SpawnerTile> _subjects = new List<SpawnerTile>();
    private List<int> _copyConstantSpawn;
    private LevelConfig _levelConfig;
    public LevelConfig LevelConfig 
    { 
        set 
        { 
            _levelConfig = value;
            _copyConstantSpawn = new List<int>();
            foreach (EnemyType enemy in _levelConfig.ConstantSpawn)
            {
                _copyConstantSpawn.Add(enemy.Count);
            }
        } 
    }
    
    public void Attach(SpawnerTile spawnerSubject)
    {
        spawnerSubject.Prefab = _levelConfig.GetRandomSpawn().GetEnemyObject();
        spawnerSubject.InitialSpawnSpeed(_levelConfig.GetInterval());
        _subjects.Add(spawnerSubject);
    }

    public void NotifySpawned(SpawnerTile spawnerSubject)
    {
        if (spawnerSubject.Prefab.Equals(_levelConfig.ConstantSpawn[0].GetEnemyObject()))
        {
            int currentCount = 0;
            for (int i = 0; i < _copyConstantSpawn.Count; i++)
            {
                if(_levelConfig.ConstantSpawn[i].GetEnemyObject() == spawnerSubject.Prefab)
                {
                    currentCount = _copyConstantSpawn[i]--;
                    break;
                }
            }
            if (currentCount <= 0)
            {
                foreach (SpawnerTile spawner in _subjects)
                {
                    if (spawner.Prefab.Equals(spawnerSubject.Prefab))
                    {
                        spawner.StopSpawn();
                    }
                }
            }
        }
    }
}