package com.tterrag.moonlightmobs;

import net.minecraft.entity.EnumCreatureType;
import net.minecraft.server.management.PlayerList;
import net.minecraft.util.text.Style;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.world.WorldServer;
import net.minecraftforge.event.world.WorldEvent.PotentialSpawns;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.Mod.EventBusSubscriber;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

@Mod(modid = "moonlightmobs", name = "Moonlight Mobs", version = "@VERSION@")
@EventBusSubscriber
public class MoonlightMobs {

    enum WarningState {
        NONE,
        STARTING_DAY,
        STARTING_NIGHT,
        ENDING
    }

    private static WarningState state = WarningState.NONE;

    @EventHandler
    public void onServerStarting(FMLServerStartingEvent event) {
        state = WarningState.NONE;
    }

    @SubscribeEvent
    public static void checkSpawn(PotentialSpawns event) {
        if (!event.getWorld().isRemote && event.getType() == EnumCreatureType.MONSTER) {
            PlayerList plist = ((WorldServer)event.getWorld()).getMinecraftServer().getPlayerList();
            if (event.getWorld().getCurrentMoonPhaseFactor() < 1 - 1e-6) {
                if (state != WarningState.ENDING) {
                    if (state != WarningState.NONE) {
                        plist.sendMessage(new TextComponentString("The curse of the full moon has lifted!").setStyle(new Style().setColor(TextFormatting.GREEN)));
                    }
                    state = WarningState.ENDING;
                }
                event.getList().clear();
            } else {
                long time = event.getWorld().getWorldTime() % 24000;
                if (state != WarningState.STARTING_DAY && state != WarningState.STARTING_NIGHT && time < 12500) {
                    plist.sendMessage(new TextComponentString("Beware, the full moon is starting! Mobs will begin to spawn in dark places.").setStyle(new Style().setColor(TextFormatting.YELLOW)));
                    state = WarningState.STARTING_DAY;
                } else if (time >= 12500) {
                    if (state == WarningState.STARTING_DAY) {
                        plist.sendMessage(new TextComponentString("The full moon is now at its peak. Mobs will spawn on the surface!").setStyle(new Style().setColor(TextFormatting.RED)));
                    } else if (state != WarningState.STARTING_NIGHT) {
                        plist.sendMessage(new TextComponentString("Beware, the full moon is starting! Mobs will begin to spawn.").setStyle(new Style().setColor(TextFormatting.RED)));
                    }
                    state = WarningState.STARTING_NIGHT;
                }
            }
        }
    }
}