using Kryz.CharacterStats.Examples;
using Photon.Pun;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

public class Health : Resource
{
    protected CharacterStats character;

    protected AbsorbEffectInstance absorbEffectInstance;
    protected DamageIncomeModifierEffectInstance damageIncomeModifierEffectInstance;

    public UnityEvent<float> onMaxHealthChanged = new UnityEvent<float>();
    public UnityEvent onDeath = new UnityEvent();

    [HideInInspector]
    public PhotonView photonView;

    protected bool invulnerable = false;
    public bool Invulnerable => invulnerable;

    float incomingValue;
    float percentStatMitigation;
    float reducedDamage;

    private bool isDead;

    public UnityEvent<bool> OnInvulnerabilityStateChanged = new UnityEvent<bool>();

    public void SetIsDeadState(bool isDead)
    {
        this.isDead = isDead;
        canRegen = !isDead;
    }

    protected virtual void Awake()
    {
        character = GetComponent<CharacterStats>();
        photonView = GetComponent<PhotonView>();
        absorbEffectInstance = GetComponent<AbsorbEffectInstance>();
        damageIncomeModifierEffectInstance = GetComponent<DamageIncomeModifierEffectInstance>();


        baseFlatRegen = flatRegen;

        character.MaxHealth.BaseValue = baseMaxValue;

        character.onUpdateStatValues.AddListener(CalculateMaxValueBasedOnStat);
    }

    protected override void Start()
    {
        if (!photonView.IsMine) return;

        base.Start();
    }

    public void SetInvulnerabilityState(bool isInvulnerable)
    {
        if (!photonView.IsMine) return;

        photonView.RPC(nameof(RPC_SetInvulnerabilityState), RpcTarget.All, isInvulnerable);
    }

    [PunRPC]
    public void RPC_SetInvulnerabilityState(bool isInvulnerable)
    {
        invulnerable = isInvulnerable;
        OnInvulnerabilityStateChanged.Invoke(invulnerable);
    }


    protected void HandleDamageIncomeModifierEffects()
    {
        if (incomingValue < 0)
        {

            if (damageIncomeModifierEffectInstance.IsActive)
            {
                //Debug.Log("Incoming damage b4 mitigation: " + incomingValue);

                incomingValue = damageIncomeModifierEffectInstance.ModifyDamageIncome(incomingValue);

                if (incomingValue > 0) //avoid damage ultra mitigated turning into healing
                    incomingValue = 0;
            }
            //Debug.Log("Incoming damage after mitigation: " + incomingValue);
        }
    }

    protected void HandleStatMitigation(DamageType dmgType)
    {
        if (incomingValue < 0)
        {
            switch (dmgType)
            {
                case DamageType.Attack:
                default:
                    {
                        percentStatMitigation = Mathf.Clamp((character.Armor.Value * GameConstants.CharacterStatsBalancing.PercentArmorIntoDamageReduction), 0,GameConstants.CharacterStatsBalancing.MaximumPercentDamageReductionFromArmor);
                    }
                    break;
                case DamageType.Spell:
                    {
                        percentStatMitigation = Mathf.Clamp((character.MagicResistance.Value * GameConstants.CharacterStatsBalancing.PercentMagicResistanceIntoDamageReduction), 0, GameConstants.CharacterStatsBalancing.MaximumPercentDamageReductionFromMagicResistance);
                    }
                    break;
            }
           

            //Debug.Log(gameObject.name + " mitigating = " + percentStatMitigation + " percent");
            reducedDamage = incomingValue * percentStatMitigation;
            incomingValue += Mathf.Abs(reducedDamage);
            //Debug.Log(gameObject.name + " receiving dmg = " + incomingValue + $" after mitigations from {(dmgType == DamageType.Attack ? nameof(character.Armor) : nameof(character.MagicResistance))}");

            if (incomingValue > 0) //avoid damage ultra mitigated turning into healing
                incomingValue = 0;
        }
    }
    protected void HandleMagicResistanceMitigation()
    {

    }

    protected void HandleAbsorbEffects()
    {
        if (incomingValue < 0)
        {
            if (absorbEffectInstance.IsActive)
            {
                //Debug.Log("Incoming damage b4 absorbs: " + incomingValue);

                incomingValue = absorbEffectInstance.AbsorbDamage(incomingValue);

                if (incomingValue > 0) //avoid complete absorbs turning into healing
                    incomingValue = 0;
            }
            //Debug.Log("Incoming damage after absorbs: " + incomingValue);
        }
    }

    public override void ChangeValue(float value)
    {
        if (!photonView.IsMine) return;
        //Debug.Log("Value to change: " + value);

        if (isDead) return;

        incomingValue = value;

        if (invulnerable && incomingValue < 0) return;

        HandleDamageIncomeModifierEffects();

        HandleAbsorbEffects();

        currentValue += incomingValue;

        currentValue = Mathf.Clamp(currentValue, 0, maxValue);
        if (currentValue == 0)
        {
            //dead;
            onDeath.Invoke();
        }
        //Debug.Log("CurrentHealth: " + currentValue);
        onResourceChanged.Invoke(currentValue);
    }

    public void ChangeValue(float value, int dmgType)
    {
        if (!photonView.IsMine) return;
        //Debug.Log("Value to change: " + value);

        if (isDead) return;

        incomingValue = value;

        //Debug.Log(gameObject.name + " receiving dmg = " + incomingValue + " before mitigations " + (DamageType)dmgType);

        if (invulnerable && incomingValue < 0) return;

        HandleDamageIncomeModifierEffects();

        HandleStatMitigation((DamageType)dmgType);

        HandleAbsorbEffects();

        currentValue += incomingValue;

        currentValue = Mathf.Clamp(currentValue, 0, maxValue);
        if (currentValue == 0)
        {
            //dead;
            onDeath.Invoke();
        }
        //Debug.Log("CurrentHealth: " + currentValue);
        onResourceChanged.Invoke(currentValue);
    }

    public bool EnoughHealth(float cost)
    {
        if (invulnerable) return true;

        return cost <= currentValue;
    }


    [PunRPC]
    public void RPC_ChangeValueHealth(float value, int dmgType)
    {
        if (!photonView.IsMine) return;
        //Debug.Log("Received ChangeValue from RPC from someone");
        ChangeValue(value, dmgType);
    }

    public override float GetMaxValue()
    {
        return base.GetMaxValue();
    }

    public virtual void CalculateMaxValueBasedOnStat()
    {
        maxValue = character.MaxHealth.Value;

        CalculateRegenValueBasedOnStat();

        onMaxHealthChanged.Invoke(maxValue);
    }
    public void CalculateRegenValueBasedOnStat()
    {
        flatRegen = baseFlatRegen + 
            (character.Strength.Value - character.Strength.BaseValue) * GameConstants.CharacterStatsBalancing.BonusStrengthToFlatRegenRate +
            (character.Vitality.Value - character.Vitality.BaseValue) * GameConstants.CharacterStatsBalancing.BonusVitalityToFlatRegenRate
            ;
        //percentRegen = (character.Vitality.Value - character.Vitality.BaseValue) * GameConstants.CharacterBalancing.BonusVitalityToPercentRegenRate;

        //Debug.Log(this.gameObject.name + " regens health " + flatRegen + " " + percentRegen + " = " + flatRegen + (maxValue * percentRegen / 100f));    
    }

    public override void SetMaxValue(float value)
    {
        base.SetMaxValue(value);

        onMaxHealthChanged.Invoke(maxValue);
    }


}