#include "Systems/HealthSystem.h"

HealthSystem::HealthSystem(SystemParams params)
    : System(params)
    , PureSystem("Health")
{
    //subscribe/listenTo playerdamage,healthpickup events (using the eventBroker)
    EVENT_SUBSCRIBE_MEMBER(m_EPlayerDamage, &HealthSystem::OnPlayerDamaged);
    EVENT_SUBSCRIBE_MEMBER(m_EPlayerHealthPickup, &HealthSystem::OnPlayerHealthPickup);
    EVENT_SUBSCRIBE_MEMBER(m_InputCommand, &HealthSystem::OnInputCommand);
    m_NetworkEnabled = ResourceManager::Load<ConfigFile>("Config.ini")->Get("Networking.StartNetwork", false);
}

void HealthSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& cHealth, double dt)
{ }

bool HealthSystem::OnPlayerDamaged(Events::PlayerDamage& e)
{
    if (!IsServer && m_NetworkEnabled || !e.Victim.Valid()) {
        return false;
    }

    ComponentWrapper cHealth = e.Victim["Health"];
    Field<double> health = cHealth["Health"];
    //if player has the boost from a defender, subtract the damage taken by StrengthOfEffect amount
    auto playerBoostDefenderEntity = e.Victim.FirstChildByName("BoostDefender");
    if (playerBoostDefenderEntity.Valid()) {
        e.Damage -= (double)playerBoostDefenderEntity["BoostDefender"]["StrengthOfEffect"];
    }
    if (health > 0) {
        health -= e.Damage;
        if (health <= 0.0) {
            Events::PlayerDeath ePlayerDeath;
            ePlayerDeath.Player = e.Victim;
            ePlayerDeath.Killer = e.Inflictor;
            m_EventBroker->Publish(ePlayerDeath);
            //Note: we will delete the entity in PlayerDeathSystem
        }
    }

    return true;
}

bool HealthSystem::OnInputCommand(Events::InputCommand& e)
{
    if (e.Command == "TakeDamage" && e.Value > 0 && LocalPlayer.Valid()) {
        Events::PlayerDamage ev;
        ev.Inflictor = LocalPlayer;
        ev.Victim = LocalPlayer;
        ev.Damage = e.Value;
        m_EventBroker->Publish(ev);
    }
    return true;
}

bool HealthSystem::OnPlayerHealthPickup(Events::PlayerHealthPickup& e)
{
    ComponentWrapper cHealth = e.Player["Health"];
    Field<double> health = cHealth["Health"];
    health += e.HealthAmount;
    health = std::min((double)health, (double)cHealth["MaxHealth"]);

    return true;
}