using Godot;
using System;

public partial class GameController : Node
{
    public static GameController Instance;

    [Export] private float _ShrineStartHP;
    [Export] private Label _CurrencyLabel;
    [Export] private Label _ShrineHealthLabel;
    [Export] private Label _scoreLabel;

    public int Wave { get; private set; }
    public int Currency { get; private set; }
    public int Score { get; private set; }
    public float ShrineHealth { get; private set; }

    private bool _waveOnGoing = false;
    
    public override void _Ready()
    {
        GameController.Instance = this;
        Wave = 0;
        Currency = 300;
        ShrineHealth = _ShrineStartHP;

        _CurrencyLabel.Text = Currency.ToString();
        _ShrineHealthLabel.Text = $"{(100f * (ShrineHealth /_ShrineStartHP)):F1}%";
        _scoreLabel.Text = "0";

        CallDeferred(nameof(DelayNextWave));
    }

    private void StartWave()
    {
        if (_waveOnGoing) return;
        Wave++;
        _waveOnGoing = true;

        int amountToSpawn = (int)Math.Round(5 * Math.Pow(Wave, 1.025));

        EnemySpawner.Instance.EnemiesSpawned = amountToSpawn;

        float baseDelay = 0.67f;
        float minDelay = 0.12f; // never go below this

        float delay = Math.Max(minDelay, baseDelay * (float)Math.Pow(0.96f, Wave));

        for (int i = 0; i < amountToSpawn; i++)
        {
            EnemySpawner.Instance.SpawnWithDelay(i * delay);
        }
    }

    private async void DelayNextWave()
    { 
        await ToSignal(GetTree().CreateTimer(7.5f), SceneTreeTimer.SignalName.Timeout);
        CallDeferred(nameof(StartWave));
    }

    public void WaveComplete()
    {
        _waveOnGoing = false;
        CallDeferred(nameof(DelayNextWave));
    }

    public void DamageShrine(float v)
    {
        v = Math.Abs(v);
        ShrineHealth -= v;
        _ShrineHealthLabel.Text = $"{(100f * (ShrineHealth /_ShrineStartHP)):F1}%";
        if (ShrineHealth <= 0)
        {
            SceneManager.Instance.ChangeScene(Scenes.End);
        }
    }

    public void AddCurrency(int v)
    {
        v = Math.Abs(v);
        Currency += v;
        Score += v;
        _scoreLabel.Text = Score.ToString();
        _CurrencyLabel.Text = Currency.ToString();
    }

    public bool TryRemoveCurrency(int v)
    {
        v = Math.Abs(v);
        if (Currency < v) return false;
        Currency -= v;
        _CurrencyLabel.Text = Currency.ToString();
        return true;
    }
}