"use strict";

const ElevatorModel = (function(){

    const DIRECTIONS = {
        north : {x : 0, z : -1}, 
        south : {x : 0, z : 1}, 
        east : {x : 1, z : 0}, 
        west : {x : -1, z : 0}
    };

    const ElevatorModel = function(hollow_bond, inputs = {}){

        const self = this;
        
        this.id = ElevatorModel.get_id(inputs.x, inputs.y, inputs.z);
        this.group_id = Common.get_value("group_id", inputs, "");

        this.x = Common.get_value("x", inputs, 0) | 0;
        this.y = Common.get_value("y", inputs, 0) | 0;
        this.z = Common.get_value("z", inputs, 0) | 0;
        this.floor = Common.get_value("floor", inputs, 0) | 0;

        this.width = hollow_bond.elevator_size;
        this.height = hollow_bond.elevator_height;
        this.depth = hollow_bond.elevator_size;
        this.padding = hollow_bond.elevator_padding;

        // Orientación de la puerta: "north", "south", "east", "west"
        this.facing = Common.get_value("facing", inputs, "north");

        // Rango de pisos y habitaciones asociadas
        this.floors_from = Common.get_value("floors_from", inputs, 0) | 0;
        this.floors_count = Common.get_value("floors_count", inputs, 1) | 0;
        this.rooms = Common.get_value("rooms", inputs, []);
        this.room = null;

        /**
         * Obtiene la habitación asociada al piso destino mediante indexado relativo.
         * @param {number} floor_number
         * @returns {RoomModel|null}
         */
        this.get_room_at_floor = floor_number => {

            const index = floor_number - self.floors_from;

            return (index >= 0 && index < self.rooms.length) ? self.rooms[index] : null;
        };

        /**
         * Devuelve las coordenadas de la casilla frente a la puerta del ascensor.
         */
        this.get_door_threshold = () => {

            const direction = DIRECTIONS[self.facing] || DIRECTIONS.north;

            return {
                x : self.x + (direction.x > 0 ? self.width : (direction.x < 0 ? -1 : 0)), 
                z : self.z + (direction.z > 0 ? self.depth : (direction.z < 0 ? -1 : 0)), 
                facing : self.facing
            };
        };

    };

    ElevatorModel.get_id = (x, y, z) => `elevator_${x}_${y}_${z}`;

    return ElevatorModel;
})();