"use strict";

const JudgePole = (function(){

    const JudgePole = function(){

        const self = this, 
              screen = {x : 0, y : 0};
        let cells = 40, 
            thread_interval = null, 
            fps = 12;

        this.item_self = document;

        this.settings = new SettingsManager(self);
        this.i18n = new I18NManager(self);
        this.db = new DatabaseManager(self);
        this.session = new SessionManager(self);
        this.views = {};
        this.content_area = null;

        const constructor = () => {
            
            const position = self.settings.get("position", null, "body");
            let target, preload = setInterval(() => {
                if(target = document.querySelector(position)){
                    clearInterval(preload);

                    self.item_self = target.appendChild(document.createElement("div"));
                    self.item_self.className = self.item_self.id = self.settings.get("class_name", null, "judge-pole");
                    self.item_self.setAttribute("data-cells", cells = self.settings.get("cells", null, cells));

                    thread_interval = setInterval(thread, 1000 / fps);

                    build();

                };
            }, fps = self.settings.get(["frames_per_second", "fps"], null, fps));

            Common.SCSS(SCSS);

        };

        const thread = () => {
            if(screen.x != self.item_self.offsetWidth || screen.y != self.item_self.offsetHeight){
                screen.x = self.item_self.offsetWidth;
                screen.y = self.item_self.offsetHeight;

                self.item_self.style.fontSize = ((screen.x < screen.y ? screen.x : screen.y) / cells) + "px";

            };
        };

        const build = () => {
            self.views.users = new UsersView(self);
            self.views.projects = new ProjectsView(self);
            self.views.votes = new VotesView(self);

            self.render_header();

            self.content_area = self.html(["main", { "class" : "jp-content-area" }])[0];
            self.item_self.appendChild(self.content_area);

            switch_view("votes");
        };

        // 1. Declarar render_header expuesto en 'this' / 'self'
        this.render_header = () => {
            const existing_header = self.item_self.querySelector("header.jp-header");
            if(existing_header) existing_header.remove();

            const is_admin = self.session.is_admin();
            const auth_required = self.session.is_auth_required();

            const nav_buttons = [
                ["button", { "class" : "jp-btn" + (self.current_view === "users" ? " is-active" : ""), "data-i18n" : "nav_users", "onclick" : (btn) => switch_view("users", btn) }, self.i18n.get("nav_users")],
                ["button", { "class" : "jp-btn" + (self.current_view === "projects" ? " is-active" : ""), "data-i18n" : "nav_projects", "onclick" : (btn) => switch_view("projects", btn) }, self.i18n.get("nav_projects")],
                ["button", { "class" : "jp-btn" + (self.current_view === "votes" ? " is-active" : ""), "data-i18n" : "nav_votes", "onclick" : (btn) => switch_view("votes", btn) }, self.i18n.get("nav_votes")]
            ];

            // Botón de Base64 sólo para administradores
            if(is_admin){
                nav_buttons.push(["button", { "class" : "jp-btn jp-btn-secondary", "data-i18n" : "nav_export", "onclick" : () => show_export_modal() }, self.i18n.get("nav_export")]);
            }

            // Botón de Login / Logout si la base de datos requiere autenticación
            if(auth_required){
                if(is_admin){
                    nav_buttons.push(["button", { 
                        "type" : "button",
                        "class" : "jp-btn-danger", 
                        "data-i18n" : "nav_logout", 
                        "style" : "margin-left:0.5em;",
                        "onclick" : () => {
                            self.session.logout();
                            self.render_header();
                            self.views[self.current_view].go();
                        } 
                    }, self.i18n.get("nav_logout")]);
                } else {
                    nav_buttons.push(["button", { 
                        "type" : "button",
                        "class" : "jp-btn-primary", 
                        "data-i18n" : "nav_login", 
                        "style" : "margin-left:0.5em;",
                        "onclick" : () => show_login_modal() 
                    }, self.i18n.get("nav_login")]);
                }
            }

            const current_lang = self.i18n.get_current_language();
            const lang_options = self.i18n.get_languages().map(lang_key => {
                const label_key = "lang_" + lang_key;
                return ["option", {
                    "value" : lang_key,
                    "data-i18n" : label_key,
                    ...(lang_key === current_lang ? { "selected" : "selected" } : {})
                }, self.i18n.get(label_key, null, lang_key)];
            });

            const lang_select = self.html(["select", {
                "class" : "jp-lang-select",
                "onchange" : (select) => {
                    self.i18n.set_language(select.value);
                    if(self.current_view && self.views[self.current_view]){
                        self.views[self.current_view].go();
                    }
                }
            }, lang_options])[0];

            const header = self.html(["header", { "class" : "jp-header" }, [
                ["h1", { "class" : "jp-title", "data-i18n" : "judge_pole" }, self.i18n.get("judge_pole")],
                ["div", { "style" : "display:flex; align-items:center; gap:0.6em;" }, [
                    ["nav", { "class" : "jp-nav" }, nav_buttons],
                    lang_select
                ]]
            ]])[0];

            self.item_self.insertBefore(header, self.content_area || null);
        };

        const show_login_modal = () => {
            const close_modal = () => {
                if(modal_overlay && modal_overlay.parentNode) modal_overlay.remove();
            };

            const modal_overlay = self.html(["div", { 
                "class" : "jp-modal-overlay",
                "onclick" : (overlay, e) => { if(e.target === overlay) close_modal(); }
            }, [
                ["div", { "class" : "jp-modal-window", "style" : "max-width:24em;" }, [
                    ["div", { "class" : "jp-modal-header" }, [
                        ["h3", { "data-i18n" : "login_modal_title" }, self.i18n.get("login_modal_title")],
                        ["button", { "type" : "button", "class" : "jp-btn-danger", "onclick" : () => close_modal() }, "✕"]
                    ]],
                    ["div", { "class" : "jp-modal-body" }, [
                        ["form", {
                            "onsubmit" : (f, e) => {
                                e.preventDefault();
                                const nick = f.querySelector("[name='nick']").value;
                                const pass = f.querySelector("[name='password']").value;
                                if(self.session.login(nick, pass)){
                                    close_modal();
                                    self.render_header();
                                    self.views[self.current_view].go();
                                } else {
                                    alert(self.i18n.get("login_error"));
                                }
                            }
                        }, [
                            ["div", { "class" : "jp-field" }, [
                                ["label", { "data-i18n" : "login_nick" }, self.i18n.get("login_nick")],
                                ["input", { "type" : "text", "name" : "nick", "required" : "required" }]
                            ]],
                            ["div", { "class" : "jp-field" }, [
                                ["label", { "data-i18n" : "login_pass" }, self.i18n.get("login_pass")],
                                ["input", { "type" : "password", "name" : "password", "required" : "required" }]
                            ]],
                            ["div", { "style" : "display:flex; justify-content:flex-end; gap:0.5em; margin-top:1em;" }, [
                                ["button", { "type" : "button", "class" : "jp-btn", "onclick" : () => close_modal() }, "Cancelar"],
                                ["button", { "type" : "submit", "class" : "jp-btn-primary", "data-i18n" : "login_btn" }, self.i18n.get("login_btn")]
                            ]]
                        ]]
                    ]]
                ]]
            ]])[0];

            self.item_self.appendChild(modal_overlay);
        };

        const switch_view = (view_name, active_btn) => {
            self.current_view = view_name;
            self.item_self.querySelectorAll(".jp-nav .jp-btn").forEach(b => b.classList.remove("is-active"));
            if(active_btn) active_btn.classList.add("is-active");

            if(self.views[view_name])
                self.views[view_name].go();
        };

        const show_export_modal = () => {
            const b64 = self.db.export_base64();

            const close_modal = () => {
                if(modal_overlay && modal_overlay.parentNode)
                    modal_overlay.remove();
            };

            const modal_overlay = self.html(["div", { 
                "class" : "jp-modal-overlay",
                "onclick" : (overlay, event) => {
                    // Cerrar sólo si se hace clic sobre el fondo oscuro exterior
                    if(event.target === overlay) close_modal();
                }
            }, [
                ["div", { "class" : "jp-modal-window", "style" : "max-width:32em;" }, [
                    ["div", { "class" : "jp-modal-header" }, [
                        ["h3", {"data-i18n" : "db_modal_title"}, self.i18n.get("db_modal_title")],
                        ["button", { "type" : "button", "class" : "jp-btn-danger", "onclick" : () => close_modal() }, "✕"]
                    ]],
                    ["div", { "class" : "jp-modal-body", "style" : "display:flex; flex-direction:column; gap:0.6em;" }, [
                        ["p", { "class" : "jp-desc", "style" : "margin:0;" }, "Copia esta constante para sobreescribir /Public/data/database.ecma.js:"],
                        ["textarea", { 
                            "style" : "width:100%; height:8em; box-sizing:border-box; font-family:monospace; font-size:0.75em; background:#0d1117; color:#58a6ff; border:0.05em solid #30363d; padding:0.5em; border-radius:0.2em; resize:none;",
                            "readonly" : "readonly"
                        }, `const database = "${b64}";`],
                        ["div", { "style" : "display:flex; justify-content:flex-end; gap:0.5em; margin-top:0.5em;" }, [
                            ["button", { "type" : "button", "class" : "jp-btn-primary", "data-i18n" : "db_copy_btn", "onclick" : () => {
                                navigator.clipboard.writeText(`const database = "${b64}";`);
                                alert(self.i18n.get("db_copied"));
                            }}, self.i18n.get("db_copy_btn")],
                            ["button", { "type" : "button", "class" : "jp-btn-secondary", "data-i18n" : "db_import_btn", "onclick" : () => {
                                const input = prompt("Pega el Base64:");
                                if(input && self.db.import_base64(input)){
                                    alert(self.i18n.get("db_imported"));
                                    self.views.users.go();
                                    close_modal();
                                }
                            }}, self.i18n.get("db_import_btn")],
                            ["button", { "type" : "button", "class" : "jp-btn", "onclick" : () => close_modal() }, "Cerrar"]
                        ]]
                    ]]
                ]]
            ]])[0];

            self.item_self.appendChild(modal_overlay);
        };

        /**
         * @param  {...(HTMLElement|string|Array.<any|null>)} inputs 
         * @returns {Array.<HTMLElement>}
         * @access public
         * @static
         */
        this.html = (...inputs) => {
            const fragment = new DocumentFragment(), 
                  master = (
                      inputs[0] && (inputs[0].tagName || inputs[0].nodeName) ? inputs[0] : 
                      typeof inputs[0] == "string" ? document.querySelector(inputs[0]) : 
                  null), 
                  items = [];
    
            (master ? inputs.slice(1) : inputs).forEach(subinputs => {
                if(subinputs && (subinputs.tagName || subinputs.nodeName))
                    fragment.appendChild(subinputs);
                else if(typeof subinputs == "string")
                    fragment.appendChild(document.createTextNode(subinputs));
                else if(subinputs instanceof Array){
                    const [tag, attributes, children] = subinputs.concat([null, null]).slice(0, 3), 
                          item = document.createElement(tag);
    
                    attributes && attributes.constructor == Object && Object.entries(attributes).forEach(([key, value]) => {
                        if(/^on[_\-]?/i.test(key) && typeof value == "function")
                            item.addEventListener(key.replace(/^on[_\-]?/i, "").replace(/[^a-z0-9]+/gi, "").toLowerCase(), event => {
                                value(item, event);
                            });
                        else if(value !== null)
                            item.setAttribute(key.replace(/[^a-z0-9]+/gi, "-"), value);
                    });
    
                    if(children instanceof Array)
                        self.html(...children).forEach(child => item.appendChild(child));
                    else if(typeof children == "string")
                        item.innerHTML += children;
                    
                    fragment.appendChild(item);
                };
            });
    
            items.push(...fragment.childNodes);
            master && master.appendChild(fragment);
    
            return items;
        };

        constructor();

    };

    return JudgePole;
})();