import org.rspeer.runetek.adapter.component.Item;
import org.rspeer.runetek.adapter.scene.Npc;
import org.rspeer.runetek.api.Definitions;
import org.rspeer.runetek.api.Game;
import org.rspeer.runetek.api.commons.Time;
import org.rspeer.runetek.api.component.tab.Inventory;
import org.rspeer.runetek.api.component.tab.Skill;
import org.rspeer.runetek.api.component.tab.Skills;
import org.rspeer.runetek.api.movement.Movement;
import org.rspeer.runetek.api.movement.path.PathEdge;
import org.rspeer.runetek.api.movement.position.WorldPosition;
import org.rspeer.runetek.api.scene.Npcs;
import org.rspeer.runetek.api.scene.Players;
import org.rspeer.script.GameAccount;
import org.rspeer.script.Script;
import org.rspeer.script.ScriptMeta;

import java.util.Optional;
import java.util.function.Predicate;

@ScriptMeta(developer = "Eru", desc = "Kills goblins", name = "GoblinKiller")
public class GoblinKiller extends Script {

    private static final int MAX_LEVEL_DIFFERENCE = 5;
    private static final WorldPosition GOBLIN_LOCATION = new WorldPosition(3259, 3233, 0);
    private static final Predicate<Npc> GOBLIN_FILTER = (goblin) -> goblin != null
            && "Goblin".equals(goblin.getName()) && goblin.getTargetIndex() == -1;

    @Override
    public void onStart() {
        if (!Game.isLoggedIn()) {
            Definitions.populate();
        }
        Game.getEventDispatcher().clear();
        super.onStart();
    }

    @Override
    public int loop() {
        if (wearBronzeSword() || switchAttackStyle())
            return 500;

        if (playerHasTarget())
            return 2000;

        if (attackGoblin() || walkToGoblins())
            return 1200;

        return 50;
    }

    private boolean walkToGoblins() {
        PathEdge[] pathEdges = Movement.findPath(Players.getLocal(), GOBLIN_LOCATION);
        while (!attackGoblin()) {
            Movement.walk(pathEdges);
            Time.sleep(1200);
        }
        return playerHasTarget();
    }

    private boolean playerHasTarget() {
        return Players.getLocal().getTargetIndex() != -1;
    }

    private boolean attackGoblin() {
        Optional<Npc> goblin = Optional.ofNullable(Npcs.getNearest(GOBLIN_FILTER));
        return !playerHasTarget() && goblin.isPresent() && goblin.get().interact("Attack");
    }

    private boolean wearBronzeSword() {
        if (!Inventory.contains("Bronze sword"))
            return false;

        Item bronzeSword = Inventory.getFirst("Bronze sword");
        return bronzeSword != null && bronzeSword.interact("Wield");
    }

    private boolean switchAttackStyle() {
        int attack = Skills.getCurrentLevel(Skill.ATTACK) / MAX_LEVEL_DIFFERENCE;
        int defence = Skills.getCurrentLevel(Skill.DEFENCE) / MAX_LEVEL_DIFFERENCE;
        int strength = Skills.getCurrentLevel(Skill.STRENGTH) / MAX_LEVEL_DIFFERENCE;

        if (attack < strength)
            return !AttackStyle.ATTACK.isSelected() && AttackStyle.ATTACK.select();

        if (strength < defence || strength < attack)
            return !AttackStyle.STRENGTH.isSelected() && AttackStyle.STRENGTH.select();

        if (defence < strength)
            return !AttackStyle.DEFENCE.isSelected() && AttackStyle.DEFENCE.select();

        return !AttackStyle.ATTACK.isSelected() && AttackStyle.ATTACK.select();
    }

}