package gtPlusPlus.plugin.fixes.vanilla;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.player.PlayerSleepInBedEvent;

import cpw.mods.fml.common.eventhandler.EventPriority;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import gregtech.asm.GTCorePlugin;
import gtPlusPlus.api.interfaces.IPlugin;
import gtPlusPlus.api.objects.Logger;
import gtPlusPlus.core.util.reflect.ReflectionUtils;
import gtPlusPlus.plugin.fixes.interfaces.IBugFix;

// TODO move this as a mixin in hodgepodge
public class VanillaBedHeightFix implements IBugFix {

    private final Method mSleepInBedAt;
    private final IPlugin mParent;

    public VanillaBedHeightFix(IPlugin minstance) {
        mParent = minstance;
        Method m = ReflectionUtils.getMethod(
            EntityPlayer.class,
            GTCorePlugin.isDevEnv() ? "sleepInBedAt" : "func_71018_a",
            int.class,
            int.class,
            int.class);
        if (m != null) {
            mSleepInBedAt = m;
            mParent.log("Registering Bed Height Fix.");
            MinecraftForge.EVENT_BUS.register(this);
        } else {
            mSleepInBedAt = null;
        }
    }

    @Override
    public boolean isFixValid() {
        return mSleepInBedAt != null;
    }

    /**
     * Fix created by deNULL -
     * https://github.com/deNULL/BugPatch/blob/master/src/main/java/ru/denull/BugPatch/mod/ClientEvents.java#L45
     *
     * @param evt - The event where a player sleeps
     */
    @SubscribeEvent(priority = EventPriority.HIGHEST)
    public void playerSleepInBed(PlayerSleepInBedEvent evt) {
        Logger.WARNING("Sleep Event Detected. Player is sleeping at Y: " + evt.y);
        if (evt.y <= 0 && isFixValid()) {
            int correctY = 256 + evt.y;
            if (correctY <= 0) {
                Logger.WARNING(
                    "You're trying to sleep at y=" + evt.y
                        + ", which is impossibly low. However, fixed y value is "
                        + correctY
                        + ", which is still below 0. Falling back to default behavior.");
            } else {
                Logger.WARNING(
                    "You're trying to sleep at y=" + evt.y
                        + ". This is probably caused by overflow, stopping original event; retrying with y="
                        + correctY
                        + ".");
                evt.result = EntityPlayer.EnumStatus.OTHER_PROBLEM;
                try {
                    mSleepInBedAt.invoke(evt.entityPlayer, evt.x, correctY, evt.z);
                } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
                    Logger.WARNING("Encountered an error trying to sleep.");
                }
            }
        } else if (!isFixValid()) {
            Logger.WARNING(
                "Method sleepInBedAt was not found in EntityPlayer (wrong MC and/or Forge version?), unable to fix");
        }
    }
}