/**
 * This file is part of the jps-like-websites lib
 * URL: https://git.labos.goip.de/chris/jpc-like-websites
 * @copyright by its creator Christian Martin 
 */


/**
 * @todo Potentially class implementation could be removed entirely.
 *       Since it (at the time being) is only working as a singleton anyway. 
 *       Further maybe rename to 'AppBuilder' instead of 'PageBuilder', 
 *       page might later become part of a navigation setup. 
 * 
 * 
 * The class provides overreaching options for building the website.
 * @extends ScriptAndStyleContext
*/
class PageBuilder extends ScriptAndStyleContext {
    /**
     * @type {Array<string>}
     */
    #autoRegisteredComponents;
    /**
     * @type {Array<string>}
     */
    #registeredComponents;
    /**
     * @type {boolean}
     */
    #showFrameworkConsole;
    /**
     * @type {Array<CompelExtension>}
     */
    _extensions;
    /**
     * @type {Map<string,*>}
     */
    _groups;

    constructor() {
        super();
        this.#showFrameworkConsole = false;

        this.#autoRegisteredComponents = [];
        this.#registeredComponents = [];
        this._extensions = [];

        this._groups = new Map();
    }

    /**
     * 
     * @param {*|Array<*>} groups 
     * @param {Component} component 
     */
    subscribeComponentToGroup(groups, component) {
        if (groups instanceof Array && !(groups instanceof String)) {
            for (let i = 0; i < groups.length; i++) {
                this.subscribeComponentToGroup(groups[i], component);
            }
        } else {
            if (!this._groups.has(groups)) {
                this._groups.set(groups, []);
            }
            this._groups.get(groups).push(component);
        }
    }

    autoRegisterComponent() {
        let compName = 'comp-el-' + this.#autoRegisteredComponents.length;
        this.#autoRegisteredComponents.push(compName);
        return compName;
    }

    registerComponent(compName) {
        this.#registeredComponents.push(compName);
        return compName;
    }


    /**
     * Inserts the given element according to the extStore into the page/document.
     * The refElement is a reference element for the case 
     * that extStore._position defines "before" or "segment_begin", 
     * which will then look for the refElement as the corresponding insert reference.
     * 
     * @param {HTMLElement|Component} element 
     * @param {ExtStorage} extStore 
     * @param {HTMLElement|Component} refElement 
     */
    addElementToPage(element, extStore = ExtStoreType.CENTRALIZED_DOC_HEAD) {
        let { insertCallEl, relativePositioning } = {};

        relativePositioning = extStore.getRelativePositioning();
        insertCallEl = extStore.getRefElement(element);

        insertCallEl.insertAdjacentElement(
            relativePositioning,
            element
        );

    }

    /**
     * Determines that the jpc-like-websites libs shouldn't be part of the resulting page.
     * Therefore the generate() methods will package/generate finalized js, css and html elements
     * into the final html page in the end. 
     * Especially tricky are reusable elements and functions that use such. 
     * 
     * @todo This method/feature will have to have a logic implemented for state altering components
     *          that then can be "packaged" into a single page.
     * @todo This method/feature will work only, if an automatic reuse logic for elements/components is implemented within the jpc lib.
     * @ATTENTION DO NOT USE
     */
    enableFrameworkConsole() {
        this.#showFrameworkConsole = true;
        return this;
    }

    /**
     * Little helper function.
     * If a single page application is in development.
     * This method sets an autoreload interval for the page.
     * Default is 20 (sec).
     * @param {number} relaunchSeconds timeinterval for page to reload (changes)
     */
    inDev(relaunchSeconds = 20) {
        let head = document.querySelector("head");
        let meta = document.createElement("meta");
        meta.setAttribute("http-equiv", "refresh");
        meta.setAttribute("content", `${relaunchSeconds}`);

        let devScript = document.createElement('script');
        devScript.setAttribute("data-label", "devScript");
        devScript.innerText = `
        let ts = new Date();
        console.log("Page is in Dev-Mode (through 'inDev()' call of PageBuilder.");
        console.log("Refreshed at: ", ts.getHours()+':'+ts.getMinutes()+':'+ts.getSeconds(), "Intervall ${relaunchSeconds}s");
        `;
        head.appendChild(devScript);
        head.insertAdjacentElement("beforeend", meta);
    }

    /**
     * 
     * @param {CompelExtension} extension 
     */
    addExtension(extension) {
        if (extension instanceof CompelExtension) {
            this._extensions.push(extension);
            extension.install();
        }
    }

    setPageTitle(title) {
        this._apptitle = title;
    }



    generate() {
        super.generate();

        let docBody = document.querySelector('body');

        if (this._apptitle) {
            document.querySelector("title")
                .innerText = this._apptitle;
        }

        if (this.#showFrameworkConsole) {
            let pageContextControlPanel = frameworkControlPanel(this._extensions);
            pageContextControlPanel = pageContextControlPanel.generate();

            docBody.insertAdjacentElement(
                "afterbegin",
                pageContextControlPanel.html
            );
        }

        }
        compelgroups = this._groups;
    }

}

const CommonCompelGroups = Object.freeze({
    AUTO_REGISTRATED: "auto_registrated",
    REUSABLE_COMPEL: "reusable",
    HIGHER_COMPEL: "higher_compel",

    OVERFLOWING: "overflowing",
    HIDDEN_ON_START: "hidden_on_start",

    IS_CONTEXT_MENU: "is_contextmenu",
    HAS_CONTEXT_MENU: "has_contextmenu",

    DRAGGABLE: "draggable",
    HAS_DRAG_EVENT: "has_drag",
    DROP_TARGET: "droptarget",

});
const Page = new PageBuilder();