import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { action, computed, observable } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { emptyFunction, returnEmptyDoclist, returnEmptyFilter, returnTrue } from '../../../Utils';
import { Doc, DocListCast, Opt } from '../../../fields/Doc';
import { InkTool } from '../../../fields/InkField';
import { Cast, NumCast, StrCast } from '../../../fields/Types';
import { DocUtils } from '../../documents/Documents';
import { DocumentManager } from '../../util/DocumentManager';
import { LinkManager } from '../../util/LinkManager';
import { SelectionManager } from '../../util/SelectionManager';
import { SnappingManager } from '../../util/SnappingManager';
import { Transform } from '../../util/Transform';
import { GestureOverlay } from '../GestureOverlay';
import { LightboxView } from '../LightboxView';
import { DefaultStyleProvider } from '../StyleProvider';
import { CollectionStackedTimeline } from '../collections/CollectionStackedTimeline';
import { TabDocView } from '../collections/TabDocView';
import { DocumentView, OpenWhere } from '../nodes/DocumentView';
import { ExploreView } from './ExploreView';
import { IBounds, emptyBounds } from './ExploreView/utils';
import { NewLightboxHeader } from './Header';
import './NewLightboxView.scss';
import { RecommendationList } from './RecommendationList';
import { IRecommendation } from './components';

enum LightboxStatus {
    RECOMMENDATIONS = 'recommendations',
    ANNOTATIONS = 'annotations',
    NONE = 'none',
}

interface LightboxViewProps {
    PanelWidth: number;
    PanelHeight: number;
    maxBorder: number[];
}

type LightboxSavedState = {
    panX: Opt<number>;
    panY: Opt<number>;
    scale: Opt<number>;
    scrollTop: Opt<number>;
    layout_fieldKey: Opt<string>;
};
@observer
export class NewLightboxView extends React.Component<LightboxViewProps> {
    @computed public static get LightboxDoc() {
        return this._doc;
    }
    private static LightboxDocTemplate = () => NewLightboxView._layoutTemplate;
    @observable private static _layoutTemplate: Opt<Doc> = undefined;
    @observable private static _layoutTemplateString: Opt<string> = undefined;
    @observable private static _doc: Opt<Doc> = undefined;
    @observable private static _docTarget: Opt<Doc> = undefined;
    @observable private static _docFilters: string[] = []; // filters
    private static _savedState: Opt<LightboxSavedState> = undefined;
    private static _history: Opt<{ doc: Doc; target?: Doc }[]> = [];
    @observable private static _future: Opt<Doc[]> = [];
    @observable private static _docView: Opt<DocumentView> = undefined;

    // keywords
    @observable private static _keywords: string[] = [];
    @action public static SetKeywords(kw: string[]) {
        this._keywords = kw;
    }
    @computed public static get Keywords() {
        return this._keywords;
    }

    // query
    @observable private static _query: string = '';
    @action public static SetQuery(query: string) {
        this._query = query;
    }
    @computed public static get Query() {
        return this._query;
    }

    // keywords
    @observable private static _recs: IRecommendation[] = [];
    @action public static SetRecs(recs: IRecommendation[]) {
        this._recs = recs;
    }
    @computed public static get Recs() {
        return this._recs;
    }

    // bounds
    @observable private static _bounds: IBounds = emptyBounds;
    @action public static SetBounds(bounds: IBounds) {
        this._bounds = bounds;
    }
    @computed public static get Bounds() {
        return this._bounds;
    }

    // explore
    @observable private static _explore: Opt<boolean> = false;
    @action public static SetExploreMode(status: Opt<boolean>) {
        this._explore = status;
    }
    @computed public static get ExploreMode() {
        return this._explore;
    }

    // newLightbox sidebar status
    @observable private static _sidebarStatus: Opt<string> = '';
    @action public static SetSidebarStatus(sidebarStatus: Opt<string>) {
        this._sidebarStatus = sidebarStatus;
    }
    @computed public static get SidebarStatus() {
        return this._sidebarStatus;
    }

    static path: { doc: Opt<Doc>; target: Opt<Doc>; history: Opt<{ doc: Doc; target?: Doc }[]>; future: Opt<Doc[]>; saved: Opt<LightboxSavedState> }[] = [];
    @action public static SetNewLightboxDoc(doc: Opt<Doc>, target?: Doc, future?: Doc[], layoutTemplate?: Doc | string) {
        if (this.LightboxDoc && this.LightboxDoc !== doc && this._savedState) {
            if (this._savedState.panX !== undefined) this.LightboxDoc._freeform_panX = this._savedState.panX;
            if (this._savedState.panY !== undefined) this.LightboxDoc._freeform_panY = this._savedState.panY;
            if (this._savedState.scrollTop !== undefined) this.LightboxDoc._layout_scrollTop = this._savedState.scrollTop;
            if (this._savedState.scale !== undefined) this.LightboxDoc._freeform_scale = this._savedState.scale;
            this.LightboxDoc.layout_fieldKey = this._savedState.layout_fieldKey;
        }
        if (!doc) {
            this._docFilters && (this._docFilters.length = 0);
            this._future = this._history = [];
            Doc.ActiveTool = InkTool.None;
            SnappingManager.SetExploreMode(false);
        } else {
            const l = DocUtils.MakeLinkToActiveAudio(() => doc).lastElement();
            l && (Cast(l.link_anchor_2, Doc, null).backgroundColor = 'lightgreen');
            CollectionStackedTimeline.CurrentlyPlaying?.forEach(dv => dv.ComponentView?.Pause?.());
            //TabDocView.PinDoc(doc, { hidePresBox: true });
            this._history ? this._history.push({ doc, target }) : (this._history = [{ doc, target }]);
            if (doc !== LightboxView.LightboxDoc) {
                this._savedState = {
                    layout_fieldKey: StrCast(doc.layout_fieldKey),
                    panX: Cast(doc.freeform_panX, 'number', null),
                    panY: Cast(doc.freeform_panY, 'number', null),
                    scale: Cast(doc.freeform_scale, 'number', null),
                    scrollTop: Cast(doc.layout_scrollTop, 'number', null),
                };
            }
        }
        if (future) {
            this._future = [
                ...(this._future ?? []),
                ...(this.LightboxDoc ? [this.LightboxDoc] : []),
                ...future
                    .slice()
                    .sort((a, b) => NumCast(b._timecodeToShow) - NumCast(a._timecodeToShow))
                    .sort((a, b) => LinkManager.Links(a).length - LinkManager.Links(b).length),
            ];
        }
        this._doc = doc;
        this._layoutTemplate = layoutTemplate instanceof Doc ? layoutTemplate : undefined;
        if (doc && (typeof layoutTemplate === 'string' ? layoutTemplate : undefined)) {
            doc.layout_fieldKey = layoutTemplate;
        }
        this._docTarget = target || doc;

        return true;
    }
    public static IsNewLightboxDocView(path: DocumentView[]) {
        return (path ?? []).includes(this._docView!);
    }
    @computed get leftBorder() {
        return Math.min(this.props.PanelWidth / 4, this.props.maxBorder[0]);
    }
    @computed get topBorder() {
        return Math.min(this.props.PanelHeight / 4, this.props.maxBorder[1]);
    }
    newLightboxWidth = () => this.props.PanelWidth - 420;
    newLightboxHeight = () => this.props.PanelHeight - 140;
    newLightboxScreenToLocal = () => new Transform(-this.leftBorder, -this.topBorder, 1);
    navBtn = (left: Opt<string | number>, bottom: Opt<number>, top: number, icon: string, display: () => string, click: (e: React.MouseEvent) => void, color?: string) => {
        return (
            <div
                className="newLightboxView-navBtn-frame"
                style={{
                    display: display(),
                    left,
                    width: bottom !== undefined ? undefined : Math.min(this.props.PanelWidth / 4, this.props.maxBorder[0]),
                    bottom,
                }}>
                <div className="newLightboxView-navBtn" title={color} style={{ top, color: color ? 'red' : 'white', background: color ? 'white' : undefined }} onClick={click}>
                    <div style={{ height: 10 }}>{color}</div>
                    <FontAwesomeIcon icon={icon as any} size="3x" />
                </div>
            </div>
        );
    };
    public static GetSavedState(doc: Doc) {
        return this.LightboxDoc === doc && this._savedState ? this._savedState : undefined;
    }

    // adds a cookie to the newLightbox view - the cookie becomes part of a filter which will display any documents whose cookie metadata field matches this cookie
    @action
    public static SetCookie(cookie: string) {
        if (this.LightboxDoc && cookie) {
            this._docFilters = (f => (this._docFilters ? [this._docFilters.push(f) as any, this._docFilters][1] : [f]))(`cookies:${cookie}:provide`);
        }
    }
    public static AddDocTab = (doc: Doc, location: OpenWhere, layoutTemplate?: Doc | string) => {
        SelectionManager.DeselectAll();
        return NewLightboxView.SetNewLightboxDoc(
            doc,
            undefined,
            [...DocListCast(doc[Doc.LayoutFieldKey(doc)]), ...DocListCast(doc[Doc.LayoutFieldKey(doc) + '_annotations']).filter(anno => anno.annotationOn !== doc), ...(NewLightboxView._future ?? [])].sort(
                (a: Doc, b: Doc) => NumCast(b._timecodeToShow) - NumCast(a._timecodeToShow)
            ),
            layoutTemplate
        );
    };
    docFilters = () => NewLightboxView._docFilters || [];
    addDocTab = NewLightboxView.AddDocTab;
    @action public static Next() {
        const doc = NewLightboxView._doc!;
        const target = (NewLightboxView._docTarget = this._future?.pop());
        const targetDocView = target && DocumentManager.Instance.getLightboxDocumentView(target);
        if (targetDocView && target) {
            const l = DocUtils.MakeLinkToActiveAudio(() => targetDocView.ComponentView?.getAnchor?.(true) || target).lastElement();
            l && (Cast(l.link_anchor_2, Doc, null).backgroundColor = 'lightgreen');
            DocumentManager.Instance.showDocument(target, { willZoomCentered: true, zoomScale: 0.9 });
            if (NewLightboxView._history?.lastElement().target !== target) NewLightboxView._history?.push({ doc, target });
        } else {
            if (!target && NewLightboxView.path.length) {
                const saved = NewLightboxView._savedState;
                if (LightboxView.LightboxDoc && saved) {
                    LightboxView.LightboxDoc._freeform_panX = saved.panX;
                    LightboxView.LightboxDoc._freeform_panY = saved.panY;
                    LightboxView.LightboxDoc._freeform_scale = saved.scale;
                    LightboxView.LightboxDoc._layout_scrollTop = saved.scrollTop;
                }
                const pop = NewLightboxView.path.pop();
                if (pop) {
                    NewLightboxView._doc = pop.doc;
                    NewLightboxView._docTarget = pop.target;
                    NewLightboxView._future = pop.future;
                    NewLightboxView._history = pop.history;
                    NewLightboxView._savedState = pop.saved;
                }
            } else {
                NewLightboxView.SetNewLightboxDoc(target);
            }
        }
    }

    @action public static Previous() {
        const previous = NewLightboxView._history?.pop();
        if (!previous || !NewLightboxView._history?.length) {
            NewLightboxView.SetNewLightboxDoc(undefined);
            return;
        }
        const { doc, target } = NewLightboxView._history?.lastElement();
        const docView = DocumentManager.Instance.getLightboxDocumentView(target || doc);
        if (docView) {
            NewLightboxView._docTarget = target;
            target && DocumentManager.Instance.showDocument(target, { willZoomCentered: true, zoomScale: 0.9 });
        } else {
            NewLightboxView.SetNewLightboxDoc(doc, target);
        }
        if (NewLightboxView._future?.lastElement() !== previous.target || previous.doc) NewLightboxView._future?.push(previous.target || previous.doc);
    }
    @action
    stepInto = () => {
        NewLightboxView.path.push({
            doc: LightboxView.LightboxDoc,
            target: NewLightboxView._docTarget,
            future: NewLightboxView._future,
            history: NewLightboxView._history,
            saved: NewLightboxView._savedState,
        });
        const coll = NewLightboxView._docTarget;
        if (coll) {
            const fieldKey = Doc.LayoutFieldKey(coll);
            const contents = [...DocListCast(coll[fieldKey]), ...DocListCast(coll[fieldKey + '_annotations'])];
            const links = LinkManager.Links(coll)
                .map(link => LinkManager.getOppositeAnchor(link, coll))
                .filter(doc => doc)
                .map(doc => doc!);
            NewLightboxView.SetNewLightboxDoc(coll, undefined, contents.length ? contents : links);
        }
    };

    @computed
    get documentView() {
        if (!LightboxView.LightboxDoc) return null;
        else
            return (
                <GestureOverlay isActive={true}>
                    <DocumentView
                        ref={action((r: DocumentView | null) => (NewLightboxView._docView = r !== null ? r : undefined))}
                        Document={LightboxView.LightboxDoc}
                        PanelWidth={this.newLightboxWidth}
                        PanelHeight={this.newLightboxHeight}
                        LayoutTemplate={NewLightboxView.LightboxDocTemplate}
                        isDocumentActive={returnTrue} // without this being true, sidebar annotations need to be activated before text can be selected.
                        isContentActive={returnTrue}
                        styleProvider={DefaultStyleProvider}
                        ScreenToLocalTransform={this.newLightboxScreenToLocal}
                        renderDepth={0}
                        containerViewPath={returnEmptyDoclist}
                        childFilters={this.docFilters}
                        childFiltersByRanges={returnEmptyFilter}
                        searchFilterDocs={returnEmptyDoclist}
                        addDocument={undefined}
                        removeDocument={undefined}
                        whenChildContentsActiveChanged={emptyFunction}
                        addDocTab={this.addDocTab}
                        pinToPres={TabDocView.PinDoc}
                        onBrowseClickScript={DocumentView.exploreMode}
                        focus={emptyFunction}
                    />
                </GestureOverlay>
            );
    }

    future = () => NewLightboxView._future;
    render() {
        let newLightboxHeaderHeight = 100;
        let downx = 0,
            downy = 0;
        return !LightboxView.LightboxDoc ? null : (
            <div
                className="newLightboxView-frame"
                onPointerDown={e => {
                    downx = e.clientX;
                    downy = e.clientY;
                }}
                onClick={e => {
                    if (Math.abs(downx - e.clientX) < 4 && Math.abs(downy - e.clientY) < 4) {
                        NewLightboxView.SetNewLightboxDoc(undefined);
                    }
                }}>
                <div className={`app-document`} style={{ gridTemplateColumns: `calc(100% - 400px) 400px` }}>
                    <div
                        className="newLightboxView-contents"
                        style={{
                            top: 20,
                            left: 20,
                            width: this.newLightboxWidth(),
                            height: this.newLightboxHeight() - 40,
                        }}>
                        <NewLightboxHeader height={newLightboxHeaderHeight} width={this.newLightboxWidth()} />
                        {!NewLightboxView._explore ? (
                            <div className="newLightboxView-doc" style={{ height: this.newLightboxHeight() }}>
                                {this.documentView}
                            </div>
                        ) : (
                            <div className={`explore`}>
                                <ExploreView recs={NewLightboxView.Recs} bounds={NewLightboxView.Bounds} />
                            </div>
                        )}
                    </div>
                    <RecommendationList keywords={NewLightboxView.Keywords} />
                </div>
            </div>
        );
    }
}
interface NewLightboxTourBtnProps {
    navBtn: (left: Opt<string | number>, bottom: Opt<number>, top: number, icon: string, display: () => string, click: (e: React.MouseEvent) => void, color?: string) => JSX.Element;
    future: () => Opt<Doc[]>;
    stepInto: () => void;
}
@observer
export class NewLightboxTourBtn extends React.Component<NewLightboxTourBtnProps> {
    render() {
        return this.props.navBtn(
            '50%',
            0,
            0,
            'chevron-down',
            () => (LightboxView.LightboxDoc /*&& this.props.future()?.length*/ ? '' : 'none'),
            e => {
                e.stopPropagation();
                this.props.stepInto();
            },
            ''
        );
    }
}