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

[Serializable]
public class StatEffect
{
    [SerializeField] eEffectType key;
    [SerializeReference, SubclassSelector] public KeyCompare subKey = new DefaultKey();
    [SerializeField] ValueModifier value;

    public eEffectType Key => key;
    public KeyCompare SubKey => subKey;
    public ValueModifier Value => value;
    public string NameKey => FormatString.StringFormat("efc{0}", (int)key);
}

[Serializable]
public struct BuffProperty
{
    public StringKey key;
    public StatEffect[] effects;
    public float duration;
}

public class BuffData
{
    static readonly float _infiniteDuration = 0;

    BuffProperty property;
    float elapsedDuration = 0.0f;

    public IReadOnlyList<StatEffect> Effects => property.effects;
    public StringKey NameKey => property.key;
    public string IconImgAtlasName => GameProperty.Instance.BuffIconAtlasName;
    public string IconImgNameInAtlas => property.key;
    public float Duration => property.duration;
    public float ElapsedDuration => elapsedDuration;
    public float RemainTime => !IsInfiniteDuration ? Mathf.Max(0, property.duration - elapsedDuration) : float.MaxValue;
    public bool IsInfiniteDuration => property.duration == _infiniteDuration;

    public BuffData(BuffProperty property, object from)
    {
        this.property = property;
        for(int i  = 0; i < Effects.Count; i++)
        {
            Effects[i].Value.From = from;
        }
    }

    public bool UpdateDuration(float deltaTime)
    {
        if (IsInfiniteDuration) return true;
        elapsedDuration += deltaTime;
        return elapsedDuration < property.duration;
    }

    public void ResetDuration()
    {
        elapsedDuration = 0.0f;
    }

    public bool TryGetEffect(eEffectType key, object subKey, out StatEffect result)
    {
        result = null;
        for (int i = 0; i < property.effects.Length; i++)
        {
            var effect = property.effects[i];
            if (effect.Key == key && effect.subKey.Match(subKey))
            {
                result = Effects[i];
                break;
            }
        }
        return result != null;
    }

    public bool HasEffect(eEffectType key, object subKey) => Array.Exists(property.effects, e => e.Key == key && e.subKey.Match(subKey));
}