import h from "hyperscript";
import "normalize.css/normalize.css";
import "milligram/dist/milligram.css";
import "../css/common.css";
import "../css/nav.css";


/**
 * Alias for `document.querySelector`.
 *
 * @param q {string} the query string
 * @returns {HTMLElement} the element identified by the query string
 */
export const $ = q => document.querySelector(q);

/**
 * Runs the given function once the page is loaded.
 *
 * This function can be used multiple times. It does not overwrite existing callbacks for the page load event.
 *
 * @param fun {function(...*): *} the function to run
 */
export const doAfterLoad = function (fun) {
    const oldOnLoad = window.onload || (() => {
    });

    window.onload = (() => {
        oldOnLoad();
        fun();
    });
};


/**
 * Creates a navigation element for navigating through the website.
 *
 * @returns {HTMLElement} a navigation element
 */
export const nav = function () {
    return h("nav.nav",
        h("ul",
            h("li", h("a", {href: "https://fwdekker.com/"},
                h("div.logo", h("img.logo", {src: "https://fwdekker.com/favicon.png"})),
                h("b", "FWDekker")
            )),
            h("li", h("a", {href: "#", innerHTML: "Tools ▾"}),
                h("ul",
                    h("li",
                        h("a", "Converter", {href: "https://fwdekker.com/tools/converter/"})
                    ),
                    h("li",
                        h("a", "Dice", {href: "https://fwdekker.com/tools/dice/"})
                    ),
                    h("li",
                        h("a", "Doomsday", {href: "https://fwdekker.com/tools/doomsday/"})
                    ),
                    h("li",
                        h("a", "Interlanguage Checker", {href: "https://fwdekker.com/tools/interlanguage-checker/"})
                    ),
                    h("li",
                        h("a", "Random FO76", {href: "https://fwdekker.com/tools/random-fo76/"})
                    ),
                )
            ),
            h("li", h("a", "Gitea", {href: "https://git.fwdekker.com/"})),
            h("li", h("a", "Blog", {href: "https://blog.fwdekker.com/"}))
        )
    );
};

/**
 * Creates a header element with the given title and description.
 *
 * @param title {string} the title to display
 * @param description {string} the description to display
 * @returns {HTMLElement} a header element
 */
export const header = function ({title, description}) {
    return h("header.header",
        h("section.container",
            h("h1", title),
            h("p", h("em", description))
        )
    );
};

/**
 * Creates a footer element with the given data.
 *
 * @param [author] {string} the author
 * @param [authorURL] {string} the URL to link the author's name to
 * @param [license] {string} the type of license
 * @param [licenseURL] {string} the URL to the license file
 * @param [vcs] {string} the type of version control
 * @param [vcsURL] {string} the URL to the repository
 * @param [version] {string} the page version
 * @returns {HTMLElement} a footer element
 */
export const footer = function ({author, authorURL, license, licenseURL, vcs, vcsURL, version}) {
    return h("footer.footer",
        h("section.container",
            footerLink("Made by ", author, authorURL, ". "),
            footerLink("Licensed under the ", license, licenseURL, ". "),
            footerLink("Source code available on ", vcs, vcsURL, ". "),
            h("div", version || "", {style: {"float": "right"}})
        )
    );
};


/**
 * Constructs a link that is used in footers.
 *
 * @param prefix {string} the text to display before the text if the text is not undefined
 * @param text {string|undefined} the text to display, or `undefined` if the returned element should be empty
 * @param url {string|undefined} the URL to link the text to, or `undefined` if the text should not be a link
 * @param suffix {string} the text to display after the text if the text is not undefined
 * @returns {HTMLElement} a footer link element
 */
const footerLink = function (prefix, text, url, suffix) {
    if (text === undefined) return h("span");

    return h("span",
        h("span", prefix),
        url !== undefined
            ? h("a", text, {href: url})
            : h("span", text),
        h("span", suffix)
    );
};