package org.prophanis.game.node.entity.joint.old_combat.battle.impl;

import org.prophanis.game.node.entity.Entity;
import org.prophanis.game.node.entity.joint.Animator.Priority;
import org.prophanis.game.node.entity.joint.old_combat.CombatResource;
import org.prophanis.game.node.entity.joint.old_combat.battle.BattleStyle;
import org.prophanis.game.node.entity.joint.old_combat.hit.Hit;
import org.prophanis.game.node.entity.npc.NPC;
import org.prophanis.game.node.entity.player.Player;
import org.prophanis.game.node.entity.player.joint.Equipment;
import org.prophanis.game.node.entity.pulse.PulseEvent;
import org.prophanis.game.node.entity.update.context.Animation;
import org.prophanis.game.node.item.Item;

/**
 * A class containing a melee attack singleton.
 * @author Displee
 */
public class MeleeBattle extends BattleStyle {

    @Override
    public boolean canSwing(Entity entity, Entity victim) {
        final boolean inRange = entity.getCenterLocation().withinDistance(victim.getCenterLocation(), distance(entity, victim) + (entity.getSize() >> 1) + (victim.getSize() >> 1));
        return inRange;
    }

    @Override
    public int swing(Entity entity, Entity victim) {
        boolean face = true;
        if (victim.getAttributes().get("last_face_entity", -1) == entity.getClientIndex()) {
            face = false;
        }
        if (face) {
            victim.face(entity);
        }
        return 1;
    }

    @Override
    public void impact(Entity entity, Entity victim) {
        Hit[] hits = new Hit[1];
        final boolean special = entity instanceof Player && ((Player) entity).getVarpManager().get(301) == 1;
        if (super.handleSpecial(entity)) {
            if (entity instanceof Player) {
                hits = CombatResource.calculateSpecialHits(entity);
            } else {
                //NPC Specials?
            }
            entity.getAttributes().set("special_request", false);
        } else {
            if (special) {
                return;
            }
            entity.getAnimator().animate(new Animation(CombatResource.getAttackAnimation(entity), Priority.HIGH));
            hits[0] = CombatResource.calculateNormalHit(entity);
        }
        for (Hit hit : hits) {
            if (hit != null) {
                victim.getCombatManager().getHits().add(hit);
            }
        }
    }

    @Override
    public void visualizeImpact(Entity entity, Entity victim) {
        if (!victim.getCombatManager().getHits().isEmpty()) {
            for (int i = 0; i < 2; i++) {
                final Hit hit = victim.getCombatManager().getHits().poll();
                if (hit != null) {
                    victim.impact(entity, hit);
                    victim.onImpact(entity);
                }
            }
            if (!victim.getCombatManager().getHits().isEmpty()) {
                victim.getPulseManager().register(new PulseEvent<Entity>(2) {

                    @Override
                    public boolean handle(Entity node) {
                        for (int i = 0; i < 2; i++) {
                            final Hit hit = victim.getCombatManager().getHits().poll();
                            if (hit != null) {
                                victim.impact(entity, hit);
                            }
                        }
                        return true;
                    }
                });
            }
            victim.getAnimator().animate(new Animation(CombatResource.getDefenceAnimation(victim)));
        }
    }

    @Override
    public int interval(Entity entity, Entity victim) {
        if (entity instanceof Player) {
            final Player player = (Player) entity;
            final Item item = player.getEquipment().get(Equipment.SLOT_WEAPON);
            if (item != null) {
                return item.getDefinition().getAttackInterval();
            }
            return 3;
        } else {
            return ((NPC) entity).getDefinition().getAttackDelay();
        }
    }

    @Override
    public int distance(Entity entity, Entity victim) {
        if (entity instanceof Player) {
            final Item weapon = ((Player) entity).getEquipment().get(Equipment.SLOT_WEAPON);
            if (weapon != null && ((weapon.getId() >= 3190 && weapon.getId() <= 3204) || weapon.getId() == 6599)) {
                return 2;//Halberds
            }
        }
        return victim.getSize();
    }
}