"use strict";

const StairGeometryDebug = (function(){

    const StairGeometryDebug = function(hollow_bond){

        const cache = {};
        const floor_height = hollow_bond.room_height || 3;

        this.get = (width, depth) => {
            const key = `${width}_${floor_height}_${depth}`;

            if(!cache[key]){
                const landing_thickness = 0.15,
                      landing_length = Math.max(1, depth * 0.25),
                      ramp_run = depth - (landing_length * 2),
                      ramp_rise = floor_height,
                      ramp_length = Math.sqrt(ramp_run * ramp_run + ramp_rise * ramp_rise);

                cache[key] = {
                    landing_bottom : new THREE.BoxGeometry(width, landing_thickness, landing_length),
                    landing_top    : new THREE.BoxGeometry(width, landing_thickness, landing_length),
                    ramp           : new THREE.BoxGeometry(width, landing_thickness, ramp_length),
                    specs : {
                        landing_length,
                        landing_thickness,
                        ramp_run,
                        ramp_rise,
                        ramp_length,
                        angle : Math.atan2(ramp_rise, ramp_run)
                    }
                };
            }

            return cache[key];
        };

        this.reset = () => {
            for(const key in cache){
                if(cache[key]){
                    cache[key].landing_bottom.dispose();
                    cache[key].landing_top.dispose();
                    cache[key].ramp.dispose();
                    delete cache[key];
                }
            }
        };

    };

    return StairGeometryDebug;
})();