"use strict";

const AsteroidEnemyModel = (function(){

    const AsteroidEnemyModel = function(xgravity, config = {}){

        const self = this;

        const resolve_image = (img) => {
            if(Array.isArray(img) && img.length > 0){
                return img[Math.floor(Math.random() * img.length)];
            }
            return typeof img === "string" ? img : null;
        };

        const image_src = resolve_image(config.image);
        const base_size = config.size || 2.4;
        const points = config.points || 80;
        const mass = config.mass || 7.0;
        let health = config.health || 50;
        const max_health = health;

        let towards_mothership = false;
        const rotation_speed = (Math.random() - 0.5) * 1.5;

        const entity = {
            x : 0,
            y : 0,
            vx : 0,
            vy : 0,
            angle : Math.random() * Math.PI * 2,
            scale : 1.0,
            alpha : 1.0,
            ready : false,
            alive : true,
            age : 0,
            config : config
        };

        const spawn_strategy = SpawnStrategies.get(config.spawn_mode || "perimeter");
        const behavior_strategy = BehaviorStrategies.get(config.behavior || "cross_screen");

        this.is_asteroid = true;
        this.is_targeted_towards_mothership = () => towards_mothership;
        this.has_impacted_mothership = () => Boolean(entity.impacted_mothership);

        // Lanzamiento hacia el centro
        this.launch_towards_mothership = (lvx, lvy) => {
            entity.vx = lvx;
            entity.vy = lvy;
            towards_mothership = true;
            entity.alpha = 1.0; // Garantiza 100% de opacidad sin transparencia de spawn
        };

        // Si vuela hacia la nodriza, queremos que se pinte en render_over por encima del plano de combate
        // Cuando towards_mothership = true, se fuerza a FALSE para que el gestor lo pinte en render_over
        this.is_ready = () => entity.ready && !towards_mothership;
        this.is_alive = () => entity.alive;
        this.get_points = () => points;
        this.get_age = () => entity.age;
        this.get_mass = () => mass;
        this.get_health = () => health;
        this.get_max_health = () => max_health;
        this.get_velocity = () => ({ vx: entity.vx, vy: entity.vy });

        this.get_state = () => ({
            x : entity.x,
            y : entity.y,
            angle : entity.angle,
            scale : entity.scale,
            alpha : 1.0, // Siempre nítido en el eje Z
            size : base_size,
            image_src : image_src,
            ready : entity.ready && !towards_mothership, // En render_over cuando vuela al cristal
            alive : entity.alive,
            health : health,
            max_health : max_health,
            radius : (base_size * entity.scale) * 0.45,
            fallback_color : towards_mothership ? "#ef4444" : "#94a3b8"
        });

        this.get_bounds = () => ({
            x : entity.x,
            y : entity.y,
            radius : (base_size * entity.scale) * 0.45
        });

        this.apply_impulse = (ivx, ivy) => {
            entity.vx += ivx;
            entity.vy += ivy;
            // Si el dron lo choca con escudo, desvía la trayectoria y frena el crecimiento
            towards_mothership = false;
            entity.scale = Math.min(entity.scale, 2.5);
        };

        this.set_velocity = (nvx, nvy) => {
            entity.vx = nvx;
            entity.vy = nvy;
        };

        this.set_position = (nx, ny) => {
            entity.x = nx;
            entity.y = ny;
        };

        this.take_damage = (amount) => {
            health = Math.max(0, health - amount);
            if(health <= 0){
                entity.alive = false;
            }
            return entity.alive;
        };

        this.on_hit = () => {
            entity.alive = false;
        };

        this.update = (delta_time, drone_info, all_enemies) => {
            if(!entity.alive) return;
            entity.age += delta_time;

            if(!entity.ready){
                spawn_strategy.update(entity, delta_time);
            } else if(towards_mothership){
                // 1. VIAJE HACIA EL CRISTAL DE LA CABINA (EJE Z)
                entity.x += entity.vx * delta_time;
                entity.y += entity.vy * delta_time;

                // Atracción suave hacia el centro absoluto (0, 0)
                const dist_center = Math.sqrt(entity.x * entity.x + entity.y * entity.y);
                if(dist_center > 0.1){
                    const pull_speed = 6.0;
                    entity.vx = -(entity.x / dist_center) * pull_speed;
                    entity.vy = -(entity.y / dist_center) * pull_speed;
                }

                // Crecimiento de escala hasta llegar a un tamaño de 40 celdas
                // Tamaño actual = base_size * entity.scale
                const target_cells = 40.0;
                const scale_target = target_cells / base_size; // ~16.66
                const growth_speed = 10.5; // Rapidez de expansión visual hacia la cámara

                entity.scale += growth_speed * delta_time;

                // Al alcanzar el tamaño gigante, se estrella en la pantalla
                if((base_size * entity.scale) >= target_cells){
                    entity.alive = false;
                    entity.impacted_mothership = true;
                    self.impacted_mothership = true; // <-- Asignado también directamente a la instancia
                }
            } else {
                // Vuelo normal
                behavior_strategy(entity, delta_time, drone_info, all_enemies);

                // Si se sale del marco de juego (> 24.5 celdas) se elimina definitivamente
                const dist_center = Math.sqrt(entity.x * entity.x + entity.y * entity.y);
                if(dist_center > 24.5 && entity.age > 1.2){
                    entity.alive = false;
                }
            }

            // Giro sobre su eje
            entity.angle += rotation_speed * delta_time;
        };

        const constructor = () => {
            spawn_strategy.init(entity, config, xgravity);
        };

        constructor();
    };

    return AsteroidEnemyModel;
})();