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package ftbsc.bscv.modules.motion;

import com.google.auto.service.AutoService;
import ftbsc.bscv.ICommons;
import ftbsc.bscv.api.ILoadable;
import ftbsc.bscv.modules.QuickModule;
import ftbsc.bscv.patches.PacketPatch.PacketEvent;
import ftbsc.bscv.tools.Setting;
import net.minecraft.client.entity.player.ClientPlayerEntity;
import net.minecraft.network.play.client.CPlayerPacket;
import net.minecraft.util.math.vector.Vector3d;
import net.minecraftforge.common.ForgeConfigSpec;
import net.minecraftforge.event.TickEvent;
import net.minecraftforge.event.TickEvent.Phase;
import net.minecraftforge.eventbus.api.SubscribeEvent;

@AutoService(ILoadable.class)
public class VanillaFlight extends QuickModule {

   private enum AntikickMode {
      NONE,
      PACKET,
      FORCED
   }

   private static final int MS_PER_TICK = 50;

   public final ForgeConfigSpec.ConfigValue<Boolean> force;
   public final ForgeConfigSpec.ConfigValue<Double>  speed;
   public final ForgeConfigSpec.ConfigValue<AntikickMode> antikick;
   public final ForgeConfigSpec.ConfigValue<Double>  antikick_magnitude;
   public final ForgeConfigSpec.ConfigValue<Integer> antikick_cycle;
   public final ForgeConfigSpec.ConfigValue<Integer> antikick_duration;

   private int tick = 0;

   public VanillaFlight() {
      super();

      this.force = Setting.Bool.builder()
         .name("force")
         .comment("force enable flight on user")
         .fallback(false)
         .build(this);

      this.speed = Setting.Decimal.builder()
         .min(0.)
         .fallback(0.05)
         .name("speed")
         .comment("flight speed to set")
         .build(this);

      this.antikick = Setting.Switch.builder(AntikickMode.class)
         .fallback(AntikickMode.NONE)
         .name("antikick")
         .comment("prevent vanilla flight kick by descending")
         .build(this);

      this.antikick_magnitude = Setting.Decimal.builder()
         .min(0.)
         .fallback(0.032)
         .name("magnitude")
         .comment("magnitude of antikick push")
         .build(this);

      this.antikick_cycle = Setting.Number.builder()
         .min(1)
         .max(80)
         .fallback(70)
         .name("cycle")
         .comment("how often to run antikick routine")
         .build(this);

      this.antikick_duration = Setting.Number.builder()
         .min(1)
         .max(80)
         .fallback(5)
         .name("duration")
         .comment("how long to apply antikick (only for PACKET)")
         .build(this);
   }

   private long last_event = 0;

   private boolean couldFlyBefore = false;
   private float flyingSpeedBefore = 0.05f;

   private AntikickState antikickState = AntikickState.COOLDOWN;

   private enum AntikickState {
      COOLDOWN,
      ACTIVE
   }

   @SubscribeEvent
   public void onTick(TickEvent.ClientTickEvent event) {
      if (event.phase == Phase.END) return;
      if (MC.player == null) return;

      MC.player.abilities.mayfly = true;
      MC.player.abilities.setFlyingSpeed(this.speed.get().floatValue());
      if (this.force.get()) {
         MC.player.abilities.flying = true;
      }

      this.tick = ( this.tick + 1 ) % this.antikick_cycle.get();
      Vector3d pos = MC.player.position();

      if (this.tick == 0 && this.antikick.get() == AntikickMode.PACKET) {
         MC.player.setPos(pos.x, pos.y - this.antikick_magnitude.get(), pos.z);
      }
   }

   @SubscribeEvent
   public void onPacketSent(PacketEvent.Outgoing event) {
      long now = System.currentTimeMillis();
      switch (this.antikickState) {
         case COOLDOWN:
            if (now - this.last_event < this.antikick_cycle.get() * MS_PER_TICK) break;
            this.last_event = now;
            this.antikickState = AntikickState.ACTIVE; // don't break and also run ACTIVE
         case ACTIVE:
            if (now - this.last_event > this.antikick_duration.get() * MS_PER_TICK) {
               this.antikickState = AntikickState.COOLDOWN;
               break;
            }
            if (
               event.packet instanceof CPlayerPacket.PositionPacket ||
               event.packet instanceof CPlayerPacket.PositionRotationPacket
            ) {
               CPlayerPacket packet  = (CPlayerPacket) event.packet;
               packet.y = packet.y - this.antikick_magnitude.get();
            }
      }
   }

   @Override
   public void enable() {
      this.tick = 0;
      if (MC.player != null) {
         this.couldFlyBefore = MC.player.abilities.mayfly;
         this.flyingSpeedBefore = MC.player.abilities.getFlyingSpeed();
      }
      super.enable();
   }

   @Override
   public void disable() {
      if (MC.player != null) {
         MC.player.abilities.mayfly = this.couldFlyBefore;
         MC.player.abilities.setFlyingSpeed(this.flyingSpeedBefore);
         if (this.force.get()) {
            MC.player.abilities.flying = false;
         }
      }
      super.disable();
   }
}