using System.Collections.Generic;
using System.Linq;
using Chickensoft.AutoInject;
using Chickensoft.Collections;
using Chickensoft.Introspection;
using Godot;
using Movementtests.tools;

namespace Movementtests.managers;


[GlobalClass, Meta(typeof(IAutoNode))]
public partial class WaveManager : Node
{
    public override void _Notification(int what) => this.Notify(what);
    
    public WaveContent WaveContent { get; set; }
    
    public int CurrentWaveIndex { get; set; }
    public int CurrentWaveCount => WaveContent.Waves.Length;

    public Godot.Collections.Dictionary<EnemyDescription, int> CurrentWave =>
        WaveContent.Waves[CurrentWaveIndex].EnemiesToSpawn;
    
    public Dictionary<ulong, Enemy?> CurrentSpawnedEnemies { get; set; } = [];
    public Set<Spawner> SpawnersInUse { get; set; } = [];
    
    public List<Spawner> Spawners { get; set; } = [];
    public void RegisterSpawner(Spawner spawner) => Spawners.Add(spawner);
    
    public void InitializeFromResource(WaveContent waveContent) => WaveContent = waveContent;
    
    public void StartWaves()
    {
        CurrentWaveIndex = 0;
        StartNextWave();
    }

    public void StartNextWave()
    {
        if (CurrentWave.Count == 0)
        {
            GD.PrintErr("Wave has no enemies");
            return;
        }

        if (Spawners.Count == 0)
        {
            GD.PrintErr("No spawners registered");
            return;
        }
        
        SpawnEnemiesAsAvailable();
    }
    
    public void SpawnEnemiesAsAvailable()
    {
        var randomizedSpawners = Spawners.ToArray();
        randomizedSpawners.Shuffle();

        foreach (var spawner in randomizedSpawners)
        {
            if (SpawnersInUse.Contains(spawner)) continue;
            foreach (var (enemyDescription, numberRemaining) in CurrentWave)
            {
                if (numberRemaining <= 0) continue;
                if (!spawner.SupportedEnemyTypes.Contains(enemyDescription.Type)) continue;
                
                var spawnedEnemy = spawner.SpawnEnemy(enemyDescription);
                if (spawnedEnemy == null) continue;

                CurrentSpawnedEnemies[spawnedEnemy.GetInstanceId()] = spawnedEnemy;
                SpawnersInUse.Add(spawner);
                
                spawnedEnemy.OnKilled += instanceId=> SpawnedEnemyDied(instanceId, spawner); 
                
                CurrentWave[enemyDescription]--;
                break;
            }
        }
        
        // foreach (var (enemyDescription, numberRemaining) in CurrentWave)
        // {
        //     if (numberRemaining <= 0) continue;
        //     foreach (var spawner in randomizedSpawners)
        //     {
        //         if (!spawner.SupportedEnemyTypes.Contains(enemyDescription.Type)) continue;
        //         if (SpawnersInUse.Contains(spawner)) continue;
        //         
        //         var spawnedEnemy = spawner.SpawnEnemy(enemyDescription);
        //         if (spawnedEnemy == null) continue;
        //
        //         CurrentSpawnedEnemies[spawnedEnemy.GetInstanceId()] = spawnedEnemy;
        //         SpawnersInUse.Add(spawner);
        //         
        //         spawnedEnemy.OnKilled += instanceId=> SpawnedEnemyDied(instanceId, spawner); 
        //         
        //         CurrentWave[enemyDescription]--;
        //         break;
        //     }
        // }
        
        var remainingEnemiesToSpawn = CurrentWave.Values.Sum();
        if (remainingEnemiesToSpawn <= 0) return;  // Wave is fully spawned
        GetTree().CreateTimer(1.0f).Timeout += SpawnEnemiesAsAvailable;  // Call back the same function later to try and spawn the rest
    }

    public void SpawnedEnemyDied(ulong instanceId, Spawner spawner)
    {
        CurrentSpawnedEnemies.Remove(instanceId);
        SpawnersInUse.Remove(spawner);
        if (CurrentSpawnedEnemies.Count == 0) FinishWave();   
    }
    
    public void FinishWave()
    {
        if (CurrentWaveIndex >= CurrentWaveCount) return; // All waves finished
        CurrentWaveIndex++;
        GetTree().CreateTimer(1.0f).Timeout += StartNextWave;  // Start next wave in 1s
    }
}