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

[System.Serializable]
public class Stats
{
    public int Health;
    public int Mana;
    public int CritDamage;
    public int CritChance;
}


public class StatsManager : MonoBehaviour
{
    public static StatsManager Instance { get; private set; }

    public Stats stats;

    private Dictionary<string, FieldInfo> statsCached = new();

    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
            return;
        }

        Instance = this;
        DontDestroyOnLoad(gameObject);

        CacheFields();
    }

    private void CacheFields()
    {
        statsCached.Clear();
        FieldInfo[] fields = stats.GetType().GetFields(BindingFlags.Public | BindingFlags.Instance);

        foreach (FieldInfo f in fields)
        {
            if (f.FieldType == typeof(int))
                statsCached[f.Name] = f;
        }
    }

    public void AddStat(string statName, int value)
    {
        if (statsCached.TryGetValue(statName, out FieldInfo field))
        {
            int current = (int)field.GetValue(stats);
            field.SetValue(stats, current + value);
        }
    }

    public int GetStat(string statName)
    {
        if (statsCached.TryGetValue(statName, out FieldInfo field))
            return (int)field.GetValue(stats);

        return 0;
    }
}