import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import { action, computed, IReactionDisposer, observable, ObservableMap, reaction, runInAction } from "mobx";
import { observer } from "mobx-react";
import * as WebRequest from 'web-request';
import { Doc, DocListCast, HeightSym, Opt, WidthSym } from "../../../fields/Doc";
import { Id } from "../../../fields/FieldSymbols";
import { HtmlField } from "../../../fields/HtmlField";
import { InkTool } from "../../../fields/InkField";
import { List } from "../../../fields/List";
import { listSpec } from "../../../fields/Schema";
import { ComputedField } from "../../../fields/ScriptField";
import { Cast, ImageCast, NumCast, StrCast } from "../../../fields/Types";
import { ImageField, WebField } from "../../../fields/URLField";
import { TraceMobx } from "../../../fields/util";
import { emptyFunction, getWordAtPoint, OmitKeys, returnFalse, returnOne, setupMoveUpEvents, smoothScroll, Utils } from "../../../Utils";
import { Docs } from "../../documents/Documents";
import { CurrentUserUtils } from "../../util/CurrentUserUtils";
import { ScriptingGlobals } from "../../util/ScriptingGlobals";
import { SnappingManager } from "../../util/SnappingManager";
import { undoBatch } from "../../util/UndoManager";
import { MarqueeOptionsMenu } from "../collections/collectionFreeForm";
import { CollectionFreeFormView } from "../collections/collectionFreeForm/CollectionFreeFormView";
import { ContextMenu } from "../ContextMenu";
import { ContextMenuProps } from "../ContextMenuItem";
import { ViewBoxAnnotatableComponent, ViewBoxAnnotatableProps } from "../DocComponent";
import { DocumentDecorations } from "../DocumentDecorations";
import { Colors } from "../global/globalEnums";
import { LightboxView } from "../LightboxView";
import { MarqueeAnnotator } from "../MarqueeAnnotator";
import { AnchorMenu } from "../pdf/AnchorMenu";
import { Annotation } from "../pdf/Annotation";
import { SidebarAnnos } from "../SidebarAnnos";
import { StyleProp } from "../StyleProvider";
import { DocumentViewProps } from "./DocumentView";
import { FieldView, FieldViewProps } from './FieldView';
import { LinkDocPreview } from "./LinkDocPreview";
import { VideoBox } from "./VideoBox";
import "./WebBox.scss";
import React = require("react");
const { CreateImage } = require("./WebBoxRenderer");
const _global = (window /* browser */ || global /* node */) as any;
const htmlToText = require("html-to-text");
@observer
export class WebBox extends ViewBoxAnnotatableComponent<ViewBoxAnnotatableProps & FieldViewProps>() {
    public static LayoutString(fieldKey: string) { return FieldView.LayoutString(WebBox, fieldKey); }
    public static openSidebarWidth = 250;
    public static sidebarResizerWidth = 5;
    private _setPreviewCursor: undefined | ((x: number, y: number, drag: boolean, hide: boolean) => void);
    private _mainCont: React.RefObject<HTMLDivElement> = React.createRef();
    private _outerRef: React.RefObject<HTMLDivElement> = React.createRef();
    private _disposers: { [name: string]: IReactionDisposer } = {};
    private _annotationLayer: React.RefObject<HTMLDivElement> = React.createRef();
    private _keyInput = React.createRef<HTMLInputElement>();
    private _initialScroll: Opt<number> = NumCast(this.layoutDoc.thumbScrollTop, NumCast(this.layoutDoc.scrollTop));
    private _getAnchor: (savedAnnotations?: ObservableMap<number, HTMLDivElement[]>) => Opt<Doc> = () => undefined;
    private _sidebarRef = React.createRef<SidebarAnnos>();
    private _searchRef = React.createRef<HTMLInputElement>();
    private _searchString = "";
    @observable private _webUrl = "";  // url of the src parameter of the embedded iframe but not necessarily the rendered page - eg, when following a link, the rendered page changes but we don't wan the src parameter to also change as that would cause an unnecessary re-render.  
    @observable private _hackHide = false;  // apparently changing the value of the 'sandbox' prop doesn't necessarily apply it to the active iframe.  so thisforces the ifrmae to be rebuilt when allowScripts is toggled
    @observable private _searching: boolean = false;
    @observable private _showSidebar = false;
    @observable private _scrollTimer: any;
    @observable private _webPageHasBeenRendered = false;
    @observable private _overlayAnnoInfo: Opt<Doc>;
    @observable private _marqueeing: number[] | undefined;
    @observable private _isAnnotating = false;
    @observable private _iframeClick: HTMLIFrameElement | undefined = undefined;
    @observable private _iframe: HTMLIFrameElement | null = null;
    @observable private _savedAnnotations = new ObservableMap<number, HTMLDivElement[]>();
    @observable private _scrollHeight = NumCast(this.layoutDoc.scrollHeight);
    @computed get _url() { return this.webField?.toString() || ""; }
    @computed get _urlHash() { return this._url ? WebBox.urlHash(this._url) + "" : ""; }
    @computed get scrollHeight() { return Math.max(this.layoutDoc[HeightSym](), this._scrollHeight); }
    @computed get allAnnotations() { return DocListCast(this.dataDoc[this.annotationKey]); }
    @computed get inlineTextAnnotations() { return this.allAnnotations.filter(a => a.textInlineAnnotations); }
    @computed get webField() { return Cast(this.dataDoc[this.props.fieldKey], WebField)?.url; }
    @computed get webThumb() {
        return this.props.thumbShown?.() &&
            ImageCast(this.layoutDoc["thumb-frozen"],
                ImageCast(this.layoutDoc.thumbScrollTop === this.layoutDoc._scrollTop && this.layoutDoc.thumbNativeWidth === NumCast(this.layoutDoc.nativeWidth) &&
                    this.layoutDoc.thumbNativeHeight === NumCast(this.layoutDoc.nativeHeight) ? this.layoutDoc.thumb : undefined))?.url;
    }

    constructor(props: any) {
        super(props);
        runInAction(() => this._webUrl = this._url);  // setting the weburl will change the src parameter of the embedded iframe and force a navigation to it.
    }

    @action
    search = (searchString: string, bwd?: boolean, clear: boolean = false) => {
        if (!this._searching && !clear) {
            this._searching = true;
            setTimeout(() => {
                this._searchRef.current?.focus();
                this._searchRef.current?.select();
                this._searchRef.current?.setRangeText(searchString);
            });
        }
        if (clear) {
            this._iframe?.contentWindow?.getSelection()?.empty();
        }
        if (searchString) {
            (this._iframe?.contentWindow as any)?.find(searchString, false, bwd, true);
        }
        return true;
    }
    @action
    setScrollPos = (pos: number) => {
        if (!this._outerRef.current || this._outerRef.current.scrollHeight < pos) {
            if (this._webPageHasBeenRendered) setTimeout(() => this.setScrollPos(pos), 250);
        } else {
            this._outerRef.current.scrollTop = pos;
            this._initialScroll = undefined;
        }
    }

    lockout = false;
    updateThumb = async () => {
        const imageBitmap = ImageCast(this.layoutDoc["thumb-frozen"])?.url.href;
        const scrollTop = NumCast(this.layoutDoc._scrollTop);
        const nativeWidth = NumCast(this.layoutDoc.nativeWidth);
        const nativeHeight = nativeWidth * this.props.PanelHeight() / this.props.PanelWidth();
        if (!this.lockout && this._iframe && !imageBitmap && (scrollTop !== this.layoutDoc.thumbScrollTop || nativeWidth !== this.layoutDoc.thumbNativeWidth || nativeHeight !== this.layoutDoc.thumbNativeHeight)) {
            var htmlString = this._iframe.contentDocument && new XMLSerializer().serializeToString(this._iframe.contentDocument);
            if (!htmlString) {
                htmlString = await (await fetch(Utils.CorsProxy(this.webField!.href))).text();
            }
            this.layoutDoc.thumb = undefined;
            this.lockout = true; // lock to prevent multiple thumb updates.
            CreateImage(
                this._webUrl.endsWith("/") ? this._webUrl.substring(0, this._webUrl.length - 1) : this._webUrl,
                this._iframe.contentDocument?.styleSheets ?? [],
                htmlString,
                nativeWidth,
                nativeHeight,
                scrollTop
            ).then
                ((data_url: any) => {
                    VideoBox.convertDataUri(data_url, this.layoutDoc[Id] + "-icon" + (new Date()).getTime(), true, this.layoutDoc[Id] + "-icon").then(
                        returnedfilename => setTimeout(action(() => {
                            this.lockout = false;
                            this.layoutDoc.thumb = new ImageField(returnedfilename);
                            this.layoutDoc.thumbScrollTop = scrollTop;
                            this.layoutDoc.thumbNativeWidth = nativeWidth;
                            this.layoutDoc.thumbNativeHeight = nativeHeight;
                        }), 500));
                })
                .catch(function (error: any) {
                    console.error('oops, something went wrong!', error);
                });
        }
    }
    async componentDidMount() {
        this.props.setContentView?.(this); // this tells the DocumentView that this WebBox is the "content" of the document.  this allows the DocumentView to call WebBox relevant methods to configure the UI (eg, show back/forward buttons)

        runInAction(() => {
            this._annotationKeySuffix = () => this._urlHash + "-annotations";
            const reqdFuncs:{[key:string]: string} = {};
            // bcz: need to make sure that doc.data-annotations points to the currently active web page's annotations (this could/should be when the doc is created)
            reqdFuncs[this.fieldKey + "-annotations"] = `copyField(this["${this.fieldKey}-"+urlHash(this["${this.fieldKey}"]?.url?.toString())+"-annotations"`;
            reqdFuncs[this.fieldKey + "-sidebar"] = `copyField(this["${this.fieldKey}-"+urlHash(this["${this.fieldKey}"]?.url?.toString())+"-sidebar"`;
            CurrentUserUtils.AssignScripts(this.dataDoc, {}, reqdFuncs);
        });
        reaction(() => this.props.isSelected(true) || this.isAnyChildContentActive() || Doc.isBrushedHighlightedDegree(this.props.Document),
            async (selected) => {
                if (selected) {
                    this._webPageHasBeenRendered = true;
                } else if ((!this.props.isContentActive(true) || SnappingManager.GetIsDragging()) &&   // update thumnail when unselected AND (no child annotation is active OR we've started dragging the document in which case no additional deselect will occur so this is the only chance to update the thumbnail)
                    !this.props.docViewPath().lastElement()?.docView?._pendingDoubleClick && // don't create a thumbnail when double-clicking to enter lightbox because thumbnail will be empty
                    LightboxView.LightboxDoc !== this.rootDoc) { // don't create a thumbnail if entering Lightbox from maximize either, since thumb will be empty.
                    this.updateThumb();
                }
            }, { fireImmediately: this.props.isSelected(true) || this.isAnyChildContentActive() || (Doc.isBrushedHighlightedDegreeUnmemoized(this.props.Document) ? true : false) });

        this._disposers.autoHeight = reaction(() => this.layoutDoc._autoHeight,
            autoHeight => {
                if (autoHeight) {
                    this.layoutDoc._nativeHeight = NumCast(this.props.Document[this.props.fieldKey + "-nativeHeight"]);
                    this.props.setHeight?.(NumCast(this.props.Document[this.props.fieldKey + "-nativeHeight"]) * (this.props.scaling?.() || 1));
                }
            });

        if (this.webField?.href.indexOf("youtube") !== -1) {
            const youtubeaspect = 400 / 315;
            const nativeWidth = Doc.NativeWidth(this.layoutDoc);
            const nativeHeight = Doc.NativeHeight(this.layoutDoc);
            if (this.webField) {
                if (!nativeWidth || !nativeHeight || Math.abs(nativeWidth / nativeHeight - youtubeaspect) > 0.05) {
                    if (!nativeWidth) Doc.SetNativeWidth(this.layoutDoc, 600);
                    Doc.SetNativeHeight(this.layoutDoc, (nativeWidth || 600) / youtubeaspect);
                    this.layoutDoc._height = this.layoutDoc[WidthSym]() / youtubeaspect;
                }
            } // else it's an HTMLfield
        } else if (this.webField && !this.dataDoc.text) {
            const result = await WebRequest.get(Utils.CorsProxy(this.webField.href));
            if (result) {
                this.dataDoc.text = htmlToText.fromString(result.content);
            }
        }

        this._disposers.scrollReaction = reaction(() => NumCast(this.layoutDoc._scrollTop),
            (scrollTop) => {
                const viewTrans = StrCast(this.Document._viewTransition);
                const durationMiliStr = viewTrans.match(/([0-9]*)ms/);
                const durationSecStr = viewTrans.match(/([0-9.]*)s/);
                const duration = durationMiliStr ? Number(durationMiliStr[1]) : durationSecStr ? Number(durationSecStr[1]) * 1000 : 0;
                this.goTo(scrollTop, duration);
            },
            { fireImmediately: true }
        );
    }
    @action componentWillUnmount() {
        Object.values(this._disposers).forEach(disposer => disposer?.());
        // this._iframe?.removeEventListener('wheel', this.iframeWheel, true);
        // this._iframe?.contentDocument?.removeEventListener("pointerup", this.iframeUp);
    }

    @action
    createTextAnnotation = (sel: Selection, selRange: Range | undefined) => {
        if (this._mainCont.current && selRange) {
            const clientRects = selRange.getClientRects();
            for (let i = 0; i < clientRects.length; i++) {
                const rect = clientRects.item(i);
                if (rect && rect.width !== this._mainCont.current.clientWidth) {
                    const annoBox = document.createElement("div");
                    annoBox.className = "marqueeAnnotator-annotationBox";
                    // transforms the positions from screen onto the pdf div
                    annoBox.style.top = (rect.top + this._mainCont.current.scrollTop).toString();
                    annoBox.style.left = (rect.left).toString();
                    annoBox.style.width = (rect.width).toString();
                    annoBox.style.height = (rect.height).toString();
                    this._annotationLayer.current && MarqueeAnnotator.previewNewAnnotation(this._savedAnnotations, this._annotationLayer.current, annoBox, 1);
                }
            }
        }
        //this._selectionText = selRange.cloneContents().textContent || "";

        // clear selection
        if (sel.empty) sel.empty();// Chrome
        else if (sel.removeAllRanges) sel.removeAllRanges();  // Firefox
        return this._savedAnnotations;
    }

    menuControls = () => this.urlEditor; // controls to be added to the top bar when a document of this type is selected

    scrollFocus = (doc: Doc, smooth: boolean) => {
        if (StrCast(doc.webUrl) !== this._url) this.submitURL(StrCast(doc.webUrl), !smooth);
        if (DocListCast(this.props.Document[this.fieldKey + "-sidebar"]).includes(doc) && !this.SidebarShown) {
            this.toggleSidebar(!smooth);
        }
        if (this._sidebarRef?.current?.makeDocUnfiltered(doc)) return 1;
        if (doc !== this.rootDoc && this._outerRef.current) {
            const windowHeight = this.props.PanelHeight() / (this.props.scaling?.() || 1);
            const scrollTo = Utils.scrollIntoView(NumCast(doc.y), doc[HeightSym](), NumCast(this.layoutDoc._scrollTop), windowHeight, windowHeight * .1,
                Math.max(NumCast(doc.y) + doc[HeightSym](), this.getScrollHeight()));
            if (scrollTo !== undefined && this._initialScroll === undefined) {
                const focusSpeed = smooth ? 500 : 0;
                this.goTo(scrollTo, focusSpeed);
                return focusSpeed;
            } else if (!this._webPageHasBeenRendered || !this.getScrollHeight() || this._initialScroll !== undefined) {
                this._initialScroll = scrollTo;
            }
        }
        return undefined;
    }

    getAnchor = () => {
        const anchor =
            this._getAnchor(this._savedAnnotations) ??
            Docs.Create.WebanchorDocument(this._url, {
                title: StrCast(this.rootDoc.title + " " + this.layoutDoc._scrollTop),
                y: NumCast(this.layoutDoc._scrollTop),
                unrendered: true
            });
        this.addDocumentWrapper(anchor);
        return anchor;
    }

    _textAnnotationCreator: (() => ObservableMap<number, HTMLDivElement[]>) | undefined;
    savedAnnotationsCreator: (() => ObservableMap<number, HTMLDivElement[]>) = () => this._textAnnotationCreator?.() || this._savedAnnotations;

    @action
    iframeUp = (e: PointerEvent) => {
        this._textAnnotationCreator = undefined;
        this.props.docViewPath().lastElement()?.docView?.cleanupPointerEvents(); // pointerup events aren't generated on containing document view, so we have to invoke it here.
        if (this._iframe?.contentWindow && this._iframe.contentDocument && !this._iframe.contentWindow.getSelection()?.isCollapsed) {
            const mainContBounds = Utils.GetScreenTransform(this._mainCont.current!);
            const scale = (this.props.scaling?.() || 1) * mainContBounds.scale;
            const sel = this._iframe.contentWindow.getSelection();
            if (sel) {
                this._textAnnotationCreator = () => this.createTextAnnotation(sel, !sel.isCollapsed ? sel.getRangeAt(0) : undefined);
                AnchorMenu.Instance.jumpTo(e.clientX * scale + mainContBounds.translateX,
                    e.clientY * scale + mainContBounds.translateY - NumCast(this.layoutDoc._scrollTop) * scale);
            }
        }
    }
    @action
    iframeDown = (e: PointerEvent) => {
        const sel = this._iframe?.contentWindow?.getSelection?.();
        const mainContBounds = Utils.GetScreenTransform(this._mainCont.current!);
        const scale = (this.props.scaling?.() || 1) * mainContBounds.scale;
        const word = getWordAtPoint(e.target, e.clientX, e.clientY);
        this._setPreviewCursor?.(e.clientX, e.clientY, false, true);
        MarqueeAnnotator.clearAnnotations(this._savedAnnotations);
        this._marqueeing = [e.clientX * scale + mainContBounds.translateX,
        e.clientY * scale + mainContBounds.translateY - NumCast(this.layoutDoc._scrollTop) * scale];
        if (word || (e.target as any || "").className.includes("rangeslider") || (e.target as any)?.onclick || (e.target as any)?.parentNode?.onclick) {
            setTimeout(action(() => this._marqueeing = undefined), 100); // bcz: hack .. anchor menu is setup within MarqueeAnnotator so we need to at least create the marqueeAnnotator even though we aren't using it.
        } else {
            this._iframeClick = this._iframe ?? undefined;
            this._isAnnotating = true;
            this.props.select(false);
            e.stopPropagation();
            e.preventDefault();
        }

        // bcz: hack - iframe grabs all events which messes up how we handle contextMenus.  So this super naively simulates the event stack to get the specific menu items and the doc view menu items.
        if (e.button === 2 || (e.button === 0 && e.altKey)) {
            e.preventDefault();
            e.stopPropagation();
            ContextMenu.Instance.closeMenu();
            ContextMenu.Instance.setIgnoreEvents(true);
        }
    }

    getScrollHeight = () => this._scrollHeight;

    isFirefox = () => {
        return "InstallTrigger" in window; // navigator.userAgent.indexOf("Chrome") !== -1;
    }
    iframeClick = () => this._iframeClick;
    iframeScaling = () => 1 / this.props.ScreenToLocalTransform().Scale;

    @action
    iframeLoaded = (e: any) => {
        const iframe = this._iframe;
        if (this._initialScroll !== undefined) {
            this.setScrollPos(this._initialScroll);
        }
        let requrlraw = decodeURIComponent(iframe?.contentWindow?.location.href.replace(Utils.prepend("") + "/corsProxy/", "") ?? this._url.toString());
        if (requrlraw !== this._url.toString()) {
            if (requrlraw.match(/q=.*&/)?.length && this._url.toString().match(/q=.*&/)?.length) {
                const matches = requrlraw.match(/[^a-zA-z]q=[^&]*/g);
                const newsearch = matches?.lastElement()!;
                if (matches) {
                    requrlraw = requrlraw.substring(0, requrlraw.indexOf(newsearch));
                    for (let i = 1; i < Array.from(matches)?.length; i++) {
                        requrlraw = requrlraw.replace(matches[i], "");
                    }
                }
                requrlraw = requrlraw.replace(/q=[^&]*/, newsearch.substring(1)).replace("search&", "search?").replace("?gbv=1", "");
            }
            this.submitURL(requrlraw, undefined, true);
        }
        if (iframe?.contentDocument) {
            iframe.contentDocument.addEventListener("pointerup", this.iframeUp);
            iframe.contentDocument.addEventListener("pointerdown", this.iframeDown);
            this._scrollHeight = Math.max(this._scrollHeight, iframe?.contentDocument.body.scrollHeight);
            setTimeout(action(() => this._scrollHeight = Math.max(this._scrollHeight, iframe?.contentDocument?.body.scrollHeight || 0)), 5000);
            iframe.setAttribute("enable-annotation", "true");
            iframe.contentDocument.addEventListener("click", undoBatch(action((e: MouseEvent) => {
                let href = "";
                for (let ele = e.target as any; ele; ele = ele.parentElement) {
                    href = (typeof (ele.href) === "string" ? ele.href : ele.href?.baseVal) || ele.parentElement?.href || href;
                }
                const origin = this.webField?.origin;
                if (href && origin) {
                    e.stopPropagation();
                    setTimeout(() => this.submitURL(href.replace(Utils.prepend(""), origin)));
                    if (this._outerRef.current) {
                        this._outerRef.current.scrollTop = NumCast(this.layoutDoc._scrollTop);
                        this._outerRef.current.scrollLeft = 0;
                    }
                }
            })));
            iframe.contentDocument.addEventListener('wheel', this.iframeWheel, false);
            //iframe.contentDocument.addEventListener('scroll', () => !this.active() && this._iframe && (this._iframe.scrollTop = NumCast(this.layoutDoc._scrollTop), false));
        }
    }

    @action
    iframeWheel = (e: any) => {
        if (!this._scrollTimer) {
            this._scrollTimer = setTimeout(action(() => this._scrollTimer = undefined), 250); // this turns events off on the iframe which allows scrolling to change direction smoothly
        }
    }

    @action
    setDashScrollTop = (scrollTop: number, timeout: number = 250) => {
        const iframeHeight = Math.max(scrollTop, this._scrollHeight - this.panelHeight());
        this._scrollTimer && clearTimeout(this._scrollTimer);
        this._scrollTimer = setTimeout(action(() => {
            this._scrollTimer = undefined;
            const newScrollTop = scrollTop > iframeHeight ? iframeHeight : scrollTop;
            if (!LinkDocPreview.LinkInfo && this._outerRef.current && newScrollTop !== this.layoutDoc.thumbScrollTop &&
                (!LightboxView.LightboxDoc || LightboxView.IsLightboxDocView(this.props.docViewPath()))) {
                this.layoutDoc.thumb = undefined;
                this.layoutDoc.thumbScrollTop = undefined;
                this.layoutDoc.thumbNativeWidth = undefined;
                this.layoutDoc.thumbNativeHeight = undefined;
                this.layoutDoc.scrollTop = this._outerRef.current.scrollTop = newScrollTop;
            } else if (this._outerRef.current) this._outerRef.current.scrollTop = newScrollTop;
        }), timeout);
    }

    goTo = (scrollTop: number, duration: number) => {
        if (this._outerRef.current) {
            const iframeHeight = Math.max(scrollTop, this._scrollHeight - this.panelHeight());
            if (duration) {
                smoothScroll(duration, [this._outerRef.current], scrollTop);
                this.setDashScrollTop(scrollTop, duration);
            } else {
                this.setDashScrollTop(scrollTop);
            }
        } else this._initialScroll = scrollTop;
    }

    forward = (checkAvailable?: boolean) => {
        const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"), []);
        const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"), []);
        if (checkAvailable) return future.length;
        runInAction(() => {
            if (future.length) {
                const curUrl = this._url;
                this.dataDoc[this.fieldKey + "-history"] = new List<string>([...history, this._url]);
                this.dataDoc[this.fieldKey] = new WebField(new URL(future.pop()!));
                if (this._webUrl === this._url) {
                    this._webUrl = curUrl;
                    setTimeout(action(() => this._webUrl = this._url));
                } else {
                    this._webUrl = this._url;
                }
                return true;
            }
        });
        return false;
    }

    back = (checkAvailable?: boolean) => {
        const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"));
        const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"), []);
        if (checkAvailable) return history.length;
        runInAction(() => {
            if (history.length) {
                const curUrl = this._url;
                if (future === undefined) this.dataDoc[this.fieldKey + "-future"] = new List<string>([this._url]);
                else this.dataDoc[this.fieldKey + "-future"] = new List<string>([...future, this._url]);
                this.dataDoc[this.fieldKey] = new WebField(new URL(history.pop()!));
                if (this._webUrl === this._url) {
                    this._webUrl = curUrl;
                    setTimeout(action(() => this._webUrl = this._url));
                } else {
                    this._webUrl = this._url;
                }
                return true;
            }
        });
        return false;
    }

    static urlHash = (s: string) => {
        return Math.abs(s.split('').reduce((a: any, b: any) => { a = ((a << 5) - a) + b.charCodeAt(0); return a & a; }, 0));
    }
    @action
    submitURL = (newUrl?: string, preview?: boolean, dontUpdateIframe?: boolean) => {
        if (!newUrl) return;
        if (!newUrl.startsWith("http")) newUrl = "http://" + newUrl;
        try {
            const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"));
            const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"));
            const url = this.webField?.toString();
            if (url && !preview) {
                this.dataDoc[this.fieldKey + "-history"] = new List<string>([...(history || []), url]);
                this.layoutDoc._scrollTop = 0;
                if (this._webPageHasBeenRendered) {
                    this.layoutDoc.thumb = undefined;
                    this.layoutDoc.thumbScrollTop = undefined;
                    this.layoutDoc.thumbNativeWidth = undefined;
                    this.layoutDoc.thumbNativeHeight = undefined;
                }
                future && (future.length = 0);
            }
            if (!preview) {
                this.dataDoc[this.fieldKey] = new WebField(new URL(newUrl));
                !dontUpdateIframe && (this._webUrl = this._url);
            }
        } catch (e) {
            console.log("WebBox URL error:" + this._url);
        }
        return true;
    }

    onWebUrlDrop = (e: React.DragEvent) => {
        const { dataTransfer } = e;
        const html = dataTransfer.getData("text/html");
        const uri = dataTransfer.getData("text/uri-list");
        const url = uri || html || this._url || "";
        const newurl = url.startsWith(window.location.origin) ?
            url.replace(window.location.origin, this._url?.match(/http[s]?:\/\/[^\/]*/)?.[0] || "") : url;
        this.submitURL(newurl);
        e.stopPropagation();
    }
    onWebUrlValueKeyDown = (e: React.KeyboardEvent) => {
        e.key === "Enter" && this.submitURL(this._keyInput.current!.value);
        e.stopPropagation();
    }

    @computed get urlEditor() {
        return (
            <div className="collectionMenu-webUrlButtons" onDrop={this.onWebUrlDrop} onDragOver={e => e.preventDefault()} >
                <input className="collectionMenu-urlInput" key={this._url}
                    placeholder="ENTER URL"
                    defaultValue={this._url}
                    onDrop={this.onWebUrlDrop}
                    onDragOver={e => e.preventDefault()}
                    onKeyDown={this.onWebUrlValueKeyDown}
                    onClick={(e) => {
                        this._keyInput.current!.select();
                        e.stopPropagation();
                    }}
                    ref={this._keyInput}
                />
                <div style={{ display: "flex", flexDirection: "row", justifyContent: "space-between", maxWidth: "250px", }}>
                    <button className="submitUrl" onClick={() => this.submitURL(this._keyInput.current!.value)} onDragOver={e => e.stopPropagation()} onDrop={this.onWebUrlDrop}>
                        GO
                    </button>
                    <button className="submitUrl" onClick={() => this.back}> <FontAwesomeIcon icon="caret-left" size="lg" /> </button>
                    <button className="submitUrl" onClick={() => this.forward}> <FontAwesomeIcon icon="caret-right" size="lg" />  </button>
                </div>
            </div>
        );
    }

    specificContextMenu = (e: React.MouseEvent | PointerEvent): void => {
        const cm = ContextMenu.Instance;
        const funcs: ContextMenuProps[] = [];
        if (!cm.findByDescription("Options...")) {
            !Doc.noviceMode && funcs.push({ description: (this.layoutDoc.useCors ? "Don't Use" : "Use") + " Cors", event: () => this.layoutDoc.useCors = !this.layoutDoc.useCors, icon: "snowflake" });
            funcs.push({
                description: (this.layoutDoc.allowScripts ? "Prevent" : "Allow") + " Scripts", event: () => {
                    this.layoutDoc.allowScripts = !this.layoutDoc.allowScripts;
                    if (this._iframe) {
                        runInAction(() => this._hackHide = true);
                        setTimeout(action(() => this._hackHide = false));
                    }
                }, icon: "snowflake"
            });
            funcs.push({
                description: (!this.layoutDoc.forceReflow ? "Force" : "Prevent") + " Reflow", event: () => {
                    const nw = !this.layoutDoc.forceReflow ? undefined : Doc.NativeWidth(this.layoutDoc) - this.sidebarWidth() / (this.props.scaling?.() || 1);
                    this.layoutDoc.forceReflow = !nw;
                    if (nw) {
                        Doc.SetInPlace(this.layoutDoc, this.fieldKey + "-nativeWidth", nw, true);
                    }
                }, icon: "snowflake"
            });
            cm.addItem({ description: "Options...", subitems: funcs, icon: "asterisk" });
        }
    }

    @action
    onMarqueeDown = (e: React.PointerEvent) => {
        if (!e.altKey && e.button === 0 && this.props.isContentActive(true) && ![InkTool.Highlighter, InkTool.Pen, InkTool.Write].includes(CurrentUserUtils.ActiveTool)) {
            setupMoveUpEvents(this, e, action(e => {
                MarqueeAnnotator.clearAnnotations(this._savedAnnotations);
                this._marqueeing = [e.clientX, e.clientY];
                return true;
            }), returnFalse, () => MarqueeAnnotator.clearAnnotations(this._savedAnnotations), false);
        }
    }
    @action finishMarquee = (x?: number, y?: number, e?: PointerEvent) => {
        this._getAnchor = AnchorMenu.Instance?.GetAnchor;
        this._marqueeing = undefined;
        this._isAnnotating = false;
        this._iframeClick = undefined;
        const sel = this._iframe?.contentDocument?.getSelection();
        if (sel?.empty) sel.empty();// Chrome
        else if (sel?.removeAllRanges) sel.removeAllRanges();  // Firefox
        if (x !== undefined && y !== undefined) {
            this._setPreviewCursor?.(x, y, false, false);
            ContextMenu.Instance.closeMenu();
            ContextMenu.Instance.setIgnoreEvents(false);
            if (e?.button === 2 || e?.altKey) {
                this.specificContextMenu(undefined as any);
                this.props.docViewPath().lastElement().docView?.onContextMenu(undefined, x, y);
            }
        }
    }

    @computed get urlContent() {
        if (this._hackHide || (this.webThumb && (!this._webPageHasBeenRendered && LightboxView.LightboxDoc !== this.rootDoc))) return (null);
        this.props.thumbShown?.();
        const field = this.dataDoc[this.props.fieldKey];
        let view;
        if (field instanceof HtmlField) {
            view = <span className="webBox-htmlSpan" contentEditable onPointerDown={e => e.stopPropagation()} dangerouslySetInnerHTML={{ __html: field.html }} />;
        } else if (field instanceof WebField) {
            const url = this.layoutDoc.useCors ? Utils.CorsProxy(this._webUrl) : this._webUrl;
            view = <iframe className="webBox-iframe" enable-annotation={"true"}
                style={{ pointerEvents: this._scrollTimer ? "none" : undefined }}
                ref={action((r: HTMLIFrameElement | null) => this._iframe = r)} src={url} onLoad={this.iframeLoaded}
                // the 'allow-top-navigation' and 'allow-top-navigation-by-user-activation' attributes are left out to prevent iframes from redirecting the top-level Dash page
                // sandbox={"allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin allow-scripts"} />;
                sandbox={`${this.layoutDoc.allowScripts ? "allow-scripts" : ""} allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin`} />;
        } else {
            view = <iframe className="webBox-iframe" enable-annotation={"true"}
                style={{ pointerEvents: this._scrollTimer ? "none" : undefined }} // if we allow pointer events when scrolling is on, then reversing direction does not work smoothly
                ref={action((r: HTMLIFrameElement | null) => this._iframe = r)} src={"https://crossorigin.me/https://cs.brown.edu"} />;
        }
        setTimeout(action(() => {
            this._scrollHeight = Math.max(this._scrollHeight, this._iframe && this._iframe.contentDocument && this._iframe.contentDocument.body ? this._iframe.contentDocument.body.scrollHeight : 0);
            if (this._initialScroll === undefined && !this._webPageHasBeenRendered) {
                this.setScrollPos(NumCast(this.layoutDoc.thumbScrollTop, NumCast(this.layoutDoc.scrollTop)));
            }
            this._webPageHasBeenRendered = true;
        }));
        return view;
    }

    addDocumentWrapper = (doc: Doc | Doc[], annotationKey?: string) => {
        (doc instanceof Doc ? [doc] : doc).forEach(doc => doc.webUrl = this._url);
        return this.addDocument(doc, annotationKey);
    }

    sidebarAddDocument = (doc: Doc | Doc[], sidebarKey?: string) => {
        if (!this.layoutDoc._showSidebar) this.toggleSidebar();
        return this.addDocumentWrapper(doc, sidebarKey);
    }
    @observable _draggingSidebar = false;
    sidebarBtnDown = (e: React.PointerEvent, onButton: boolean) => { // onButton determines whether the width of the pdf box changes, or just the ratio of the sidebar to the pdf
        setupMoveUpEvents(this, e, action((e, down, delta) => {
            this._draggingSidebar = true;
            const localDelta = this.props.ScreenToLocalTransform().scale(this.props.scaling?.() || 1).transformDirection(delta[0], delta[1]);
            const nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
            const nativeHeight = NumCast(this.layoutDoc[this.fieldKey + "-nativeHeight"]);
            const curNativeWidth = NumCast(this.layoutDoc.nativeWidth, nativeWidth);
            const ratio = (curNativeWidth + (onButton ? 1 : -1) * localDelta[0] / (this.props.scaling?.() || 1)) / nativeWidth;
            if (ratio >= 1) {
                this.layoutDoc.nativeWidth = nativeWidth * ratio;
                this.layoutDoc.nativeHeight = nativeHeight * (1 + ratio);
                onButton && (this.layoutDoc._width = this.layoutDoc[WidthSym]() + localDelta[0]);
                this.layoutDoc._showSidebar = nativeWidth !== this.layoutDoc._nativeWidth;
            }
            return false;
        }), action(() => this._draggingSidebar = false), () => this.toggleSidebar());
    }
    @observable _previewNativeWidth: Opt<number> = undefined;
    @observable _previewWidth: Opt<number> = undefined;
    toggleSidebar = action((preview: boolean = false) => {
        var nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
        if (!nativeWidth) {
            const defaultNativeWidth = this.dataDoc[this.fieldKey] instanceof WebField ? 850 : this.Document[WidthSym]();
            Doc.SetNativeWidth(this.dataDoc, Doc.NativeWidth(this.dataDoc) || defaultNativeWidth);
            Doc.SetNativeHeight(this.dataDoc, Doc.NativeHeight(this.dataDoc) || this.Document[HeightSym]() / this.Document[WidthSym]() * defaultNativeWidth);
            nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
        }
        const sideratio = ((!this.layoutDoc.nativeWidth || this.layoutDoc.nativeWidth === nativeWidth ? WebBox.openSidebarWidth : 0) + nativeWidth) / nativeWidth;
        const pdfratio = ((!this.layoutDoc.nativeWidth || this.layoutDoc.nativeWidth === nativeWidth ? WebBox.openSidebarWidth + WebBox.sidebarResizerWidth : 0) + nativeWidth) / nativeWidth;
        const curNativeWidth = NumCast(this.layoutDoc.nativeWidth, nativeWidth);
        if (preview) {
            this._previewNativeWidth = nativeWidth * sideratio;
            this._previewWidth = this.layoutDoc[WidthSym]() * nativeWidth * sideratio / curNativeWidth;
            this._showSidebar = true;
        }
        else {
            this.layoutDoc._showSidebar = !this.layoutDoc._showSidebar;
            this.layoutDoc._width = this.layoutDoc[WidthSym]() * nativeWidth * pdfratio / curNativeWidth;
            if (!this.layoutDoc._showSidebar && !(this.dataDoc[this.fieldKey] instanceof WebField)) {
                this.layoutDoc.nativeWidth = this.dataDoc[this.fieldKey + "-nativeWidth"] = undefined;
            } else {
                this.layoutDoc.nativeWidth = nativeWidth * pdfratio;
            }
        }
    });
    sidebarWidth = () => !this.SidebarShown ? 0 :
        WebBox.sidebarResizerWidth + (this._previewWidth ? WebBox.openSidebarWidth :
            (NumCast(this.layoutDoc.nativeWidth) - Doc.NativeWidth(this.dataDoc)) * this.props.PanelWidth() / NumCast(this.layoutDoc.nativeWidth))

    @computed get content() {
        const interactive = !this.props.docViewPath().lastElement()?.docView?._pendingDoubleClick && this.props.isContentActive() && this.props.pointerEvents?.() !== "none" && CurrentUserUtils.ActiveTool === InkTool.None && !DocumentDecorations.Instance?.Interacting;
        return <div className={"webBox-cont" + (interactive ? "-interactive" : "")}
            onKeyDown={e => e.stopPropagation()}
            style={{ width: !this.layoutDoc.forceReflow ? NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]) || `100%` : "100%", }}>
            {this.urlContent}
        </div>;
    }

    @computed get annotationLayer() {
        TraceMobx();
        return <div className="webBox-annotationLayer" style={{ height: Doc.NativeHeight(this.Document) || undefined }} ref={this._annotationLayer}>
            {this.inlineTextAnnotations.sort((a, b) => NumCast(a.y) - NumCast(b.y)).map(anno =>
                <Annotation {...this.props} fieldKey={this.annotationKey} pointerEvents={this.pointerEvents} showInfo={this.showInfo} dataDoc={this.dataDoc} anno={anno} key={`${anno[Id]}-annotation`} />)}
        </div>;

    }
    @computed get SidebarShown() { return this._showSidebar || this.layoutDoc._showSidebar ? true : false; }

    @computed get searchUI() {
        return <div className="webBox-ui"
            onPointerDown={e => e.stopPropagation()} style={{ display: this.props.isContentActive() ? "flex" : "none" }}>
            <div className="webBox-overlayCont" onPointerDown={(e) => e.stopPropagation()} style={{ left: `${this._searching ? 0 : 100}%` }}>
                <button className="webBox-overlayButton" title={"search"} />
                <input className="webBox-searchBar" placeholder="Search" ref={this._searchRef} onChange={this.searchStringChanged}
                    onKeyDown={e => { e.key === "Enter" && this.search(this._searchString, e.shiftKey); e.stopPropagation(); }} />
                <button className="webBox-search" title="Search" onClick={e => this.search(this._searchString, e.shiftKey)}>
                    <FontAwesomeIcon icon="search" size="sm" />
                </button>
            </div>
            <button className="webBox-overlayButton" title={"search"}
                onClick={action(() => { this._searching = !this._searching; this.search("", false, true); })} >
                <div className="webBox-overlayButton-arrow" onPointerDown={(e) => e.stopPropagation()} />
                <div className="webBox-overlayButton-iconCont" onPointerDown={(e) => e.stopPropagation()}>
                    <FontAwesomeIcon icon={this._searching ? "times" : "search"} size="lg" />
                </div>
            </button>
        </div>;
    }
    searchStringChanged = (e: React.ChangeEvent<HTMLInputElement>) => this._searchString = e.currentTarget.value;
    showInfo = action((anno: Opt<Doc>) => this._overlayAnnoInfo = anno);
    setPreviewCursor = (func?: (x: number, y: number, drag: boolean, hide: boolean) => void) => this._setPreviewCursor = func;
    panelWidth = () => this.props.PanelWidth() / (this.props.scaling?.() || 1) - this.sidebarWidth() + WebBox.sidebarResizerWidth; // (this.Document.scrollHeight || Doc.NativeHeight(this.Document) || 0);
    panelHeight = () => this.props.PanelHeight() / (this.props.scaling?.() || 1); // () => this._pageSizes.length && this._pageSizes[0] ? this._pageSizes[0].width : Doc.NativeWidth(this.Document);
    scrollXf = () => this.props.ScreenToLocalTransform().translate(0, NumCast(this.layoutDoc._scrollTop));
    anchorMenuClick = () => this._sidebarRef.current?.anchorMenuClick;
    basicFilter = () => [...this.props.docFilters(), Utils.PropUnsetFilter("textInlineAnnotations")];
    transparentFilter = () => [...this.props.docFilters(), Utils.IsTransparentFilter()];
    opaqueFilter = () => [...this.props.docFilters(), Utils.IsOpaqueFilter()];
    childStyleProvider = (doc: (Doc | undefined), props: Opt<DocumentViewProps>, property: string): any => {
        if (doc instanceof Doc && property === StyleProp.PointerEvents) {
            if (doc.textInlineAnnotations) return "none";
        }
        return this.props.styleProvider?.(doc, props, property);
    }
    pointerEvents = () => !this._draggingSidebar && this.props.isContentActive() && this.props.pointerEvents?.() !== "none" && !MarqueeOptionsMenu.Instance.isShown() ? "all" : SnappingManager.GetIsDragging() ? undefined : "none";
    annotationPointerEvents = () => this._isAnnotating || SnappingManager.GetIsDragging() ? "all" : "none";
    render() {
        const pointerEvents = this.layoutDoc._lockedPosition ? "none" : this.props.pointerEvents?.() as any;
        const previewScale = this._previewNativeWidth ? 1 - this.sidebarWidth() / this._previewNativeWidth : 1;
        const scale = previewScale * (this.props.scaling?.() || 1);
        const renderAnnotations = (docFilters?: () => string[]) =>
            <CollectionFreeFormView {...OmitKeys(this.props, ["NativeWidth", "NativeHeight", "setContentView"]).omit}
                renderDepth={this.props.renderDepth + 1}
                isAnnotationOverlay={true}
                fieldKey={this.annotationKey}
                CollectionView={undefined}
                setPreviewCursor={this.setPreviewCursor}
                PanelWidth={this.panelWidth}
                PanelHeight={this.panelHeight}
                ScreenToLocalTransform={this.scrollXf}
                scaling={returnOne}
                dropAction={"alias"}
                docFilters={docFilters || this.basicFilter}
                dontRenderDocuments={docFilters ? false : true}
                select={emptyFunction}
                ContentScaling={returnOne}
                bringToFront={emptyFunction}
                whenChildContentsActiveChanged={this.whenChildContentsActiveChanged}
                removeDocument={this.removeDocument}
                moveDocument={this.moveDocument}
                addDocument={this.addDocument}
                styleProvider={this.childStyleProvider}
                childPointerEvents={this.props.isContentActive() ? "all" : undefined}
                pointerEvents={this.annotationPointerEvents} />;
        return (
            <div className="webBox" ref={this._mainCont}
                style={{ pointerEvents: this.pointerEvents(), display: this.props.thumbShown?.() ? "none" : undefined }} >
                <div className="webBox-background" style={{ backgroundColor: this.props.styleProvider?.(this.rootDoc, this.props, StyleProp.BackgroundColor) }} />
                <div className="webBox-container" style={{
                    width: `calc(${100 / scale}% - ${!this.SidebarShown ? 0 : (this.sidebarWidth() - WebBox.sidebarResizerWidth) / scale * (this._previewWidth ? scale : 1)}px)`,
                    transform: `scale(${scale})`,
                    pointerEvents
                }} onContextMenu={this.specificContextMenu}>
                    <div className={"webBox-outerContent"} ref={this._outerRef}
                        style={{
                            height: `${100 / scale}%`,
                            pointerEvents
                        }}
                        onWheel={e => { e.stopPropagation(); e.preventDefault(); }} // block wheel events from propagating since they're handled by the iframe
                        onScroll={e => this.setDashScrollTop(this._outerRef.current?.scrollTop || 0)}
                        onPointerDown={this.onMarqueeDown}
                    >
                        <div className={"webBox-innerContent"} style={{ height: this._webPageHasBeenRendered ? NumCast(this.scrollHeight, 50) : "100%", pointerEvents }}>
                            {this.content}
                            <div style={{ mixBlendMode: "multiply" }}>
                                {renderAnnotations(this.transparentFilter)}
                            </div>
                            {renderAnnotations(this.opaqueFilter)}
                            {SnappingManager.GetIsDragging() ? (null) : renderAnnotations()}
                            {this.annotationLayer}
                        </div>
                    </div>
                    {!this._marqueeing || !this._mainCont.current || !this._annotationLayer.current ? (null) :
                        <div style={{ transformOrigin: "top left", transform: `scale(${1 / scale})` }}>
                            <MarqueeAnnotator rootDoc={this.rootDoc}
                                iframe={this.isFirefox() ? this.iframeClick : undefined}
                                iframeScaling={this.isFirefox() ? this.iframeScaling : undefined}
                                anchorMenuClick={this.anchorMenuClick}
                                scrollTop={0}
                                down={this._marqueeing} scaling={returnOne}
                                addDocument={this.addDocumentWrapper}
                                docView={this.props.docViewPath().lastElement()}
                                finishMarquee={this.finishMarquee}
                                savedAnnotations={this.savedAnnotationsCreator}
                                annotationLayer={this._annotationLayer.current}
                                mainCont={this._mainCont.current} /> </div>}
                </div >
                <div className="webBox-sideResizer" style={{
                    display: this.SidebarShown ? undefined : "none",
                    width: WebBox.sidebarResizerWidth,
                    left: `calc(100% - ${this.sidebarWidth() - WebBox.sidebarResizerWidth}px)`
                }}
                    onPointerDown={e => this.sidebarBtnDown(e, false)} />
                <SidebarAnnos ref={this._sidebarRef}
                    {...this.props}
                    whenChildContentsActiveChanged={this.whenChildContentsActiveChanged}
                    fieldKey={this.fieldKey + "-" + this._urlHash}
                    rootDoc={this.rootDoc}
                    layoutDoc={this.layoutDoc}
                    dataDoc={this.dataDoc}
                    setHeight={emptyFunction}
                    nativeWidth={this._previewNativeWidth ?? NumCast(this.layoutDoc._nativeWidth) - WebBox.sidebarResizerWidth / (this.props.scaling?.() || 1)}
                    showSidebar={this.SidebarShown}
                    sidebarAddDocument={this.sidebarAddDocument}
                    moveDocument={this.moveDocument}
                    removeDocument={this.removeDocument}
                />
                <div className="webBox-overlayButton-sidebar" key="sidebar" title="Toggle Sidebar"
                    style={{
                        display: !this.props.isContentActive() ? "none" : undefined,
                        top: StrCast(this.rootDoc._showTitle) === "title" ? 20 : 5,
                        backgroundColor: this.SidebarShown ? Colors.MEDIUM_BLUE : Colors.BLACK
                    }}
                    onPointerDown={e => this.sidebarBtnDown(e, true)} >
                    <FontAwesomeIcon style={{ color: Colors.WHITE }} icon={"comment-alt"} size="sm" />
                </div>
                {!this.props.isContentActive() ? (null) : this.searchUI}
            </div>);
    }
}
ScriptingGlobals.add(function urlHash(url: string) { return WebBox.urlHash(url); });