local UIBattleHeroWeakEffect = UIViewClass()

local CONST_PERCENT_WEAK = 0.1

function UIBattleHeroWeakEffect:OnCreated()
    UIUtils.SetActive(self.effect_HeroWeak.gameObject,false)
end

function UIBattleHeroWeakEffect:OnClosed()
    self:ClearHeroWeak()
end

function UIBattleHeroWeakEffect:InitHeroWeak(entity)
    if entity then
        self.entity = entity
        local uisystem = self.entity._renderSystem._uiSystem
        uisystem.OnUpdateHP = AddEventListener(uisystem.OnUpdateHP,self:OnHpChanged())
    end
end

function UIBattleHeroWeakEffect:ClearHeroWeak()
    if self.entity then
        local uisystem = self.entity._renderSystem._uiSystem
        uisystem.OnUpdateHP = RemoveEventListener(uisystem.OnUpdateHP,self:OnHpChanged())
        if self.effect_HeroWeak then
            UIUtils.SetActive(self.effect_HeroWeak.gameObject,false)
        end
        self.entity = nil
        self.inWeak = false
    end
end

function UIBattleHeroWeakEffect:OnHpChanged()
    self.onHpChanged = self.onHpChanged or function(hpPercent)
        if hpPercent < CONST_PERCENT_WEAK then
            if not self.inWeak then
                self.inWeak = true
                if self.effect_HeroWeak then
                    self.effect_HeroWeak:StopUIEffect()
                    self.effect_HeroWeak:PlayUIEffect()
                end
            end
        else
            if self.inWeak then
                self.inWeak = false
                if self.effect_HeroWeak then
                    self.effect_HeroWeak:StopUIEffect()
                end
            end
        end
    end
    return self.onHpChanged
end

return UIBattleHeroWeakEffect