"use strict";

const CockpitImpactFx = (function(){

    const CockpitImpactFx = function(xgravity){

        let flash_alpha = 0;
        let shards = [];

        this.trigger = () => {
            flash_alpha = 0.55; // Fogonazo rápido sobre el cristal
            shards = [];        // Sin metralla de piedras
        };

        this.update = (delta_time) => {
            if(flash_alpha > 0){
                flash_alpha = Math.max(0, flash_alpha - (3.2 * delta_time));
            }

            for(let i = shards.length - 1; i >= 0; i--){
                const s = shards[i];
                s.life -= s.decay * delta_time;
                if(s.life <= 0){
                    shards.splice(i, 1);
                    continue;
                }
                s.x += s.vx * delta_time;
                s.y += s.vy * delta_time;
                s.angle += s.angular_vel * delta_time;
                s.vx *= 0.96;
                s.vy *= 0.96;
            }
        };

        this.render = (ctx, width, height) => {
            const cx = width / 2;
            const cy = height / 2;

            // Flash blanco en pantalla completa
            if(flash_alpha > 0){
                ctx.save();
                ctx.fillStyle = "#ffffff";
                ctx.globalAlpha = Math.min(0.7, flash_alpha);
                ctx.fillRect(0, 0, width, height);
                ctx.restore();
            }

            // Esquirlas de roca sólidas
            if(shards.length > 0){
                ctx.save();
                ctx.translate(cx, cy);

                for(let i = 0; i < shards.length; i++){
                    const s = shards[i];
                    ctx.save();
                    ctx.translate(s.x, s.y);
                    ctx.rotate(s.angle);
                    ctx.fillStyle = s.color;
                    ctx.globalAlpha = Math.max(0, s.life);

                    ctx.beginPath();
                    ctx.moveTo(s.vertices[0].x, s.vertices[0].y);
                    for(let v = 1; v < s.vertices.length; v++){
                        ctx.lineTo(s.vertices[v].x, s.vertices[v].y);
                    }
                    ctx.closePath();
                    ctx.fill();

                    ctx.lineWidth = 1.0;
                    ctx.strokeStyle = "rgba(15, 23, 42, 0.85)";
                    ctx.stroke();

                    ctx.restore();
                }

                ctx.restore();
            }
        };

        this.reset = () => {
            flash_alpha = 0;
            shards = [];
        };
    };

    return CockpitImpactFx;
})();