import url from "url";

/**
 * c(ustom element)-operation-li ( list item )
 *
 * @param {App} app - The main view object for CyberChef
 * @param {string} name - The name of the operation
 * @param {Object} icon - { class: string, innerText: string } - The optional and customizable icon displayed on the right side of the operation
 * @param {Boolean} includeStarIcon - Include the left side 'star' icon to favourite an operation easily
 */
export class COperationLi extends HTMLElement {
    constructor(
        app,
        name,
        icon,
        includeStarIcon,
    ) {
        super();

        this.app = app;
        this.name = name;
        this.icon = icon;
        this.includeStarIcon = includeStarIcon;

        this.config = this.app.operations[name];
        this.isFavourite = this.app.isLocalStorageAvailable() && localStorage.favourites?.includes(name);

        this.build();

        this.addEventListener('click', this.handleClick.bind(this));
        this.addEventListener('dblclick', this.handleDoubleClick.bind(this));
    }

    // todo: dont think I need config separately, just use this.app.operations[name].xx?

    /**
     * @fires OperationsWaiter#operationDblclick on double click
     * @param {Event} e
     */
    handleDoubleClick(e) {
        if (e.target === this.querySelector("li")) {
            this.querySelector("li.operation").classList.add("selected");
        }
    }

    /**
     * Handle click
     * @param {Event} e
     */
    handleClick(e) {
        if (e.target === this.querySelector("i.star-icon")) {
            this.app.addFavourite(this.name);
            this.updateFavourite(true);
        }
    }

    /**
     * Build c-operation-li
     */
    build() {
        const li = this.buildListItem();
        const icon = this.buildIcon();

        if ( this.includeStarIcon ){
            const starIcon = this.buildStarIcon();
            li.appendChild(starIcon);
        }

        li.appendChild(icon);

        this.appendChild(li);
    }

    /**
     * Given a URL for a Wikipedia (or other wiki) page, this function returns a link to that page.
     *
     * @param {string} urlStr
     * @returns {string}
     */
    titleFromWikiLink(urlStr) {
        const urlObj = url.parse(urlStr);
        let wikiName = "",
            pageTitle = "";

        switch (urlObj.host) {
            case "forensicswiki.xyz":
                wikiName = "Forensics Wiki";
                pageTitle = urlObj.query.substr(6).replace(/_/g, " "); // Chop off 'title='
                break;
            case "wikipedia.org":
                wikiName = "Wikipedia";
                pageTitle = urlObj.pathname.substr(6).replace(/_/g, " "); // Chop off '/wiki/'
                break;
            default:
                // Not a wiki link, return full URL
                return `<a href='${urlStr}' target='_blank'>More Information<i class='material-icons inline-icon'>open_in_new</i></a>`;
        }

        return `<a href='${urlObj.href}' target='_blank'>${pageTitle}<i class='material-icons inline-icon'>open_in_new</i></a> on ${wikiName}`;
    }

    /**
     * Build the li element
     */
    buildListItem() {
        const li = document.createElement("li");

        li.setAttribute("data-name", this.name);
        li.classList.add("operation");

        if (this.isFavourite) {
            li.classList.add("favourite");
        }

        li.textContent = this.name;

        if (this.config.description){
            let dataContent = this.config.description;

            if (this.config.infoURL) {
                dataContent += `<hr>${this.titleFromWikiLink(this.config.infoURL)}`;
            }

            li.setAttribute("data-container", "body");
            li.setAttribute("data-toggle", "popover");
            li.setAttribute("data-placement", "left");
            li.setAttribute("data-html", "true");
            li.setAttribute("data-trigger", "hover");
            li.setAttribute("data-boundary", "viewport");
            li.setAttribute("data-content", dataContent);
        }

        return li;
    }

    /**
     * Build the operation list item right side icon
     */
    buildIcon() {
        const icon = document.createElement("i");

        icon.classList.add("material-icons");
        icon.classList.add("op-icon");
        icon.classList.add(this.icon.class);

        icon.innerText = this.icon.innerText;

        return icon;
    }

    /**
     * Build the ( optional ) star icon
     */
    buildStarIcon() {
        const icon = document.createElement("i");
        icon.setAttribute("title", this.name);

        icon.classList.add("material-icons");
        icon.classList.add("op-icon");
        icon.classList.add("star-icon");

        if (this.isFavourite){
            icon.innerText = "star";
        } else {
            icon.innerText = "star_outline";
        }

        return icon;
    }

    updateFavourite(isFavourite) {
        if (isFavourite) {
            this.querySelector("li").classList.add("favourite");
            this.querySelector("i.star-icon").innerText = "star";
        } else {
            this.querySelector("li").classList.remove("favourite");
            this.querySelector("i.star-icon").innerText = "star_outline";
        }
    }
}


customElements.define("c-operation-li", COperationLi);