package mindustry.entities.abilities;

import arc.*;
import arc.func.*;
import arc.graphics.*;
import arc.graphics.g2d.*;
import arc.math.*;
import arc.math.geom.*;
import arc.scene.ui.layout.*;
import arc.util.*;
import mindustry.*;
import mindustry.content.*;
import mindustry.gen.*;
import mindustry.graphics.*;
import mindustry.ui.*;

import static mindustry.Vars.*;

public class ForceFieldAbility extends Ability{
    /** Shield radius. */
    public float radius = 60f;
    /** Shield regen speed in damage/tick. */
    public float regen = 0.1f;
    /** Maximum shield. */
    public float max = 200f;
    /** Cooldown after the shield is broken, in ticks. */
    public float cooldown = 60f * 5;
    /** Sides of shield polygon. */
    public int sides = 6;
    /** Rotation of shield. */
    public float rotation = 0f;

    /** State. */
    protected float radiusScale, alpha;
    protected boolean wasBroken = true;

    private static float realRad;
    private static Unit paramUnit;
    private static ForceFieldAbility paramField;
    private static final Cons<Bullet> shieldConsumer = trait -> {
        if(trait.team != paramUnit.team && trait.type.absorbable && Intersector.isInRegularPolygon(paramField.sides, paramUnit.x, paramUnit.y, realRad, paramField.rotation, trait.x(), trait.y()) && paramUnit.shield > 0){
            trait.absorb();
            Fx.absorb.at(trait);
            paramUnit.shield -= trait.type().shieldDamage(trait);
            paramField.alpha = 1f;
        }
    };

    public ForceFieldAbility(float radius, float regen, float max, float cooldown){
        this.radius = radius;
        this.regen = regen;
        this.max = max;
        this.cooldown = cooldown;
    }

    public ForceFieldAbility(float radius, float regen, float max, float cooldown, int sides, float rotation){
        this.radius = radius;
        this.regen = regen;
        this.max = max;
        this.cooldown = cooldown;
        this.sides = sides;
        this.rotation = rotation;
    }

    ForceFieldAbility(){}

    @Override
    public void addStats(Table t){
        super.addStats(t);
        t.add(Core.bundle.format("bullet.range", Strings.autoFixed(radius / tilesize, 2)));
        t.row();
        t.add(abilityStat("shield", Strings.autoFixed(max, 2)));
        t.row();
        t.add(abilityStat("repairspeed", Strings.autoFixed(regen * 60f, 2)));
        t.row();
        t.add(abilityStat("cooldown", Strings.autoFixed(cooldown / 60f, 2)));
    }

    @Override
    public void update(Unit unit){
        if(unit.shield <= 0f && !wasBroken){
            unit.shield -= cooldown * regen;

            Fx.shieldBreak.at(unit.x, unit.y, radius, unit.type.shieldColor(unit), this);
        }

        wasBroken = unit.shield <= 0f;

        if(unit.shield < max){
            unit.shield += Time.delta * regen;
        }

        alpha = Math.max(alpha - Time.delta/10f, 0f);

        if(unit.shield > 0){
            radiusScale = Mathf.lerpDelta(radiusScale, 1f, 0.06f);
            paramUnit = unit;
            paramField = this;
            checkRadius(unit);

            Groups.bullet.intersect(unit.x - realRad, unit.y - realRad, realRad * 2f, realRad * 2f, shieldConsumer);
        }else{
            radiusScale = 0f;
        }
    }

    @Override
    public void death(Unit unit){

        //self-destructing units can have a shield on death
        if(unit.shield > 0f && !wasBroken){
            Fx.shieldBreak.at(unit.x, unit.y, radius, unit.type.shieldColor(unit), this);
        }
    }

    @Override
    public void draw(Unit unit){
        checkRadius(unit);

        if(unit.shield > 0){
            Draw.color(unit.type.shieldColor(unit), Color.white, Mathf.clamp(alpha));

            if(Vars.renderer.animateShields){
                Draw.z(Layer.shields + 0.001f * alpha);
                Fill.poly(unit.x, unit.y, sides, realRad, rotation);
            }else{
                Draw.z(Layer.shields);
                Lines.stroke(1.5f);
                Draw.alpha(0.09f);
                Fill.poly(unit.x, unit.y, sides, radius, rotation);
                Draw.alpha(1f);
                Lines.poly(unit.x, unit.y, sides, radius, rotation);
            }
        }
    }

    @Override
    public void displayBars(Unit unit, Table bars){
        bars.add(new Bar("stat.shieldhealth", Pal.accent, () -> unit.shield / max)).row();
    }

    @Override
    public void created(Unit unit){
        unit.shield = max;
    }

    public void checkRadius(Unit unit){
        //timer2 is used to store radius scale as an effect
        realRad = radiusScale * radius;
    }
}
