"use strict";

const DifficultySelectView = (function(){

    const DifficultySelectView = function(xgravity){

        const self = this;
        let view_element = null;

        this.close = () => {
            if(view_element && view_element.parentNode){
                view_element.parentNode.removeChild(view_element);
                view_element = null;
            }
        };

        this.go = () => {
            self.close();

            const is_game_active = xgravity.views.game && typeof xgravity.views.game.is_active === "function"
                ? xgravity.views.game.is_active()
                : false;

            const presets = xgravity.settings.get("difficulty_presets", null, {});
            const current_diff = xgravity.settings.get("current_difficulty", null, "average");

            // Lista ordenada de niveles
            const diff_keys = ["training", "newbie", "lazy", "average", "hard", "berserk", "insane"];
            const diff_buttons = [];

            for(let i = 0; i < diff_keys.length; i++){
                const key = diff_keys[i];
                const preset = presets[key];
                if(!preset) continue;

                const is_selected = (key === current_diff);

                diff_buttons.push([
                    "button", {
                        class : `xg-btn xg-btn-diff ${is_selected ? "xg-btn-selected" : ""}`,
                        "data-i18n" : preset.label_i18n || `diff_${key}`,
                        onclick : () => {
                            // 1. Guardar la dificultad seleccionada
                            xgravity.settings.add({ current_difficulty : key });

                            // 2. Desmontar esta vista
                            self.close();

                            // 3. Iniciar la partida limpia
                            if(xgravity.views.game){
                                if(is_game_active){
                                    xgravity.views.game.stop();
                                }
                                xgravity.views.game.go();
                            }
                        }
                    }
                ]);
            }

            // Botón Volver (cierra esta vista y regresa al Menú Principal)
            diff_buttons.push([
                "button", {
                    class : "xg-btn xg-btn-back",
                    "data-i18n" : "btn_back",
                    onclick : () => {
                        self.close();
                        if(xgravity.views.main_menu){
                            xgravity.views.main_menu.go();
                        }
                    }
                }
            ]);

            const nodes = xgravity.html(xgravity.item_self, [
                "div", { class : "xg-view xg-difficulty-select" }, [
                    ["h2", { class : "xg-subtitle", "data-i18n" : "opt_difficulty" }],
                    ["div", { class : "xg-menu-list" }, diff_buttons]
                ]
            ]);

            view_element = nodes[0];
            xgravity.i18n.update();
        };

    };

    return DifficultySelectView;
})();