import 'golden-layout/src/css/goldenlayout-base.css';
import 'golden-layout/src/css/goldenlayout-dark-theme.css';
import { clamp } from 'lodash';
import { action, computed, IReactionDisposer, observable, reaction } from "mobx";
import { observer } from "mobx-react";
import * as ReactDOM from 'react-dom';
import { DataSym, Doc, DocListCast, Opt } from "../../../fields/Doc";
import { Id } from '../../../fields/FieldSymbols';
import { FieldId } from "../../../fields/RefField";
import { listSpec } from '../../../fields/Schema';
import { Cast, NumCast, StrCast } from "../../../fields/Types";
import { TraceMobx } from '../../../fields/util';
import { emptyFunction, emptyPath, returnFalse, returnOne, returnTrue, returnZero, setupMoveUpEvents, Utils } from "../../../Utils";
import { DocServer } from "../../DocServer";
import { CurrentUserUtils } from '../../util/CurrentUserUtils';
import { DocumentManager } from '../../util/DocumentManager';
import { DragManager, dropActionType } from "../../util/DragManager";
import { SelectionManager } from '../../util/SelectionManager';
import { SnappingManager } from '../../util/SnappingManager';
import { Transform } from '../../util/Transform';
import { undoBatch, UndoManager } from "../../util/UndoManager";
import { DocumentView } from "../nodes/DocumentView";
import { PresBox } from '../nodes/PresBox';
import { CollectionDockingView } from './CollectionDockingView';
import "./TabDocView.scss";
import { CollectionDockingViewMenu } from './CollectionDockingViewMenu';
import { CollectionFreeFormView } from './collectionFreeForm/CollectionFreeFormView';
import { CollectionViewType } from './CollectionView';
import React = require("react");
const _global = (window /* browser */ || global /* node */) as any;

interface TabDocViewProps {
    documentId: FieldId;
    glContainer: any;
}
@observer
export class TabDocView extends React.Component<TabDocViewProps> {
    _mainCont: HTMLDivElement | null = null;
    _tabReaction: IReactionDisposer | undefined;
    @observable private _panelWidth = 0;
    @observable private _panelHeight = 0;
    @observable private _isActive: boolean = false;
    @observable private _document: Doc | undefined;
    @observable private _view: DocumentView | undefined;

    get stack(): any { return (this.props as any).glContainer.parent.parent; }
    get tab() { return (this.props as any).glContainer.tab; }
    get view() { return this._view; }

    @action
    init = (tab: any, doc: Opt<Doc>) => {
        if (tab.DashDoc !== doc && doc && tab.hasOwnProperty("contentItem") && tab.contentItem.config.type !== "stack") {
            tab._disposers = {} as { [name: string]: IReactionDisposer };
            tab.contentItem.config.fixed && (tab.contentItem.parent.config.fixed = true);
            tab.DashDoc = doc;

            const titleEle = tab.titleElement[0];
            CollectionDockingView.Instance.tabMap.add(tab);
            titleEle.onchange = (e: any) => {
                titleEle.size = e.currentTarget.value.length + 3;
                Doc.GetProto(doc).title = e.currentTarget.value;
            };
            titleEle.size = StrCast(doc.title).length + 3;
            titleEle.value = doc.title;
            titleEle.style["max-width"] = "100px";
            const gearSpan = document.createElement("span");
            gearSpan.className = "collectionDockingView-gear";
            gearSpan.style.position = "relative";
            gearSpan.style.paddingLeft = "0px";
            gearSpan.style.paddingRight = "12px";
            const stack = tab.contentItem.parent;
            tab.element[0].onclick = (e: any) => {
                if (e.target.className !== "lm_close_tab" && this.view) {
                    SelectionManager.SelectDoc(this.view, false);
                    if (Date.now() - titleEle.lastClick < 1000) titleEle.select();
                    titleEle.lastClick = Date.now();
                    (document.activeElement !== titleEle) && titleEle.focus();
                }
            };
            // shifts the focus to this tab when another tab is dragged over it
            tab.element[0].onmouseenter = (e: MouseEvent) => {
                if (SnappingManager.GetIsDragging() && tab.contentItem !== tab.header.parent.getActiveContentItem()) {
                    tab.header.parent.setActiveContentItem(tab.contentItem);
                }
                tab.setActive(true);
            };
            const onDown = (e: React.PointerEvent) => {
                setupMoveUpEvents(this, e, (e) => {
                    !e.defaultPrevented && DragManager.StartDocumentDrag([gearSpan], new DragManager.DocumentDragData([doc], doc.dropAction as dropActionType), e.clientX, e.clientY);
                    return !e.defaultPrevented;
                }, returnFalse, emptyFunction);
            };

            tab._disposers.selectionDisposer = reaction(() => SelectionManager.SelectedDocuments().some(v => v.topMost && v.props.Document === doc),
                (selected) => {
                    selected && tab.contentItem !== tab.header.parent.getActiveContentItem() && UndoManager.RunInBatch(() => tab.header.parent.setActiveContentItem(tab.contentItem), "tab switch");
                }
            );
            tab._disposers.buttonDisposer = reaction(() => this.view,
                (view) => {
                    if (view) {
                        ReactDOM.render(<span title="Drag as document" className="collectionDockingView-dragAsDocument" onPointerDown={onDown} >
                            <CollectionDockingViewMenu views={() => [view]} Stack={stack} />
                        </span>,
                            gearSpan);
                        tab._disposers.buttonDisposer?.();
                    }
                }, { fireImmediately: true });

            tab.reactComponents = [gearSpan];
            tab.element.append(gearSpan);
            tab._disposers.reactionDisposer = reaction(() => ({ title: doc.title, degree: Doc.IsBrushedDegree(doc) }), ({ title, degree }) => {
                tab.titleElement[0].value = title;
                tab.titleElement[0].style.padding = degree ? 0 : 2;
                tab.titleElement[0].style.border = `${["gray", "gray", "gray"][degree]} ${["none", "dashed", "solid"][degree]} 2px`;
            }, { fireImmediately: true });
            tab.closeElement.off('click') //unbind the current click handler
                .click(function () {
                    Object.values(tab._disposers).forEach((disposer: any) => disposer?.());
                    Doc.AddDocToList(CurrentUserUtils.MyRecentlyClosed, "data", doc, undefined, true, true);
                    SelectionManager.DeselectAll();
                    tab.contentItem.remove();
                });
        }
    }
    /**
     * Adds a document to the presentation view
     **/
    @undoBatch
    @action
    public static PinDoc(doc: Doc, unpin = false) {
        if (unpin) TabDocView.UnpinDoc(doc);
        else {
            //add this new doc to props.Document
            const curPres = CurrentUserUtils.ActivePresentation;
            if (curPres) {
                const pinDoc = Doc.MakeAlias(doc);
                pinDoc.presentationTargetDoc = doc;
                pinDoc.presZoomButton = true;
                pinDoc.context = curPres;
                Doc.AddDocToList(curPres, "data", pinDoc);
                if (curPres.expandBoolean) pinDoc.presExpandInlineButton = true;
                if (!DocumentManager.Instance.getDocumentView(curPres)) {
                    CollectionDockingView.AddSplit(curPres, "right");
                }
                DocumentManager.Instance.jumpToDocument(doc, false, undefined, Cast(doc.context, Doc, null));
            }
        }
    }
    /**
     * Adds a document to the presentation view
     **/
    @undoBatch
    @action
    public static UnpinDoc(doc: Doc) {
        //add this new doc to props.Document
        const curPres = CurrentUserUtils.ActivePresentation;
        if (curPres) {
            const ind = DocListCast(curPres.data).findIndex((val) => Doc.AreProtosEqual(val, doc));
            ind !== -1 && Doc.RemoveDocFromList(curPres, "data", DocListCast(curPres.data)[ind]);
        }
    }

    componentDidMount() {
        const color = () => StrCast(this._document?._backgroundColor, this._document && CollectionDockingView.Instance?.props.backgroundColor?.(this._document, 0) || "white");
        const selected = () => SelectionManager.SelectedDocuments().some(v => v.props.Document === this._document);
        const updateTabColor = () => this.tab?.titleElement[0] && (this.tab.titleElement[0].style.backgroundColor = selected() ? color() : "");
        const observer = new _global.ResizeObserver(action((entries: any) => {
            for (const entry of entries) {
                this._panelWidth = entry.contentRect.width;
                this._panelHeight = entry.contentRect.height;
            }
            updateTabColor();
        }));
        observer.observe(this.props.glContainer._element[0]);
        this.props.glContainer.layoutManager.on("activeContentItemChanged", this.onActiveContentItemChanged);
        this.props.glContainer.tab?.isActive && this.onActiveContentItemChanged();
        this._tabReaction = reaction(() => ({ views: SelectionManager.SelectedDocuments(), color: color() }), updateTabColor, { fireImmediately: true });
    }

    componentWillUnmount() {
        this._tabReaction?.();
        this.props.glContainer.layoutManager.off("activeContentItemChanged", this.onActiveContentItemChanged);
    }

    @action.bound
    private onActiveContentItemChanged() {
        if (this.props.glContainer.tab && this._isActive !== this.props.glContainer.tab.isActive) {
            this._isActive = this.props.glContainer.tab.isActive;
            this._isActive && setTimeout(() => this.view && SelectionManager.SelectDoc(this.view, false), 0);
            (CollectionDockingView.Instance as any)._goldenLayout.isInitialised && CollectionDockingView.Instance.stateChanged();
            !this._isActive && this._document && Doc.UnBrushDoc(this._document); // bcz: bad -- trying to simulate a pointer leave event when a new tab is opened up on top of an existing one.
        }
    }

    get layoutDoc() { return this._document && Doc.Layout(this._document); }
    nativeAspect = () => this.nativeWidth() ? this.nativeWidth() / this.nativeHeight() : 0;
    panelWidth = () => this.layoutDoc?.maxWidth ? Math.min(Math.max(NumCast(this.layoutDoc._width), NumCast(this.layoutDoc._nativeWidth)), this._panelWidth) :
        (this.nativeAspect() && this.nativeAspect() < this._panelWidth / this._panelHeight ? this._panelHeight * this.nativeAspect() : this._panelWidth)
    panelHeight = () => this.nativeAspect() && this.nativeAspect() > this._panelWidth / this._panelHeight ? this._panelWidth / this.nativeAspect() : this._panelHeight;
    nativeWidth = () => !this.layoutDoc?._fitWidth ? NumCast(this.layoutDoc?._nativeWidth) || this._panelWidth : 0;
    nativeHeight = () => !this.layoutDoc?._fitWidth ? NumCast(this.layoutDoc?._nativeHeight) || this._panelHeight : 0;

    contentScaling = () => {
        const nativeH = this.nativeHeight();
        const nativeW = this.nativeWidth();
        let scaling = 1;
        if (!this.layoutDoc?._fitWidth && (!nativeW || !nativeH)) {
            scaling = 1;
        } else if (NumCast(this.layoutDoc?._nativeWidth) && ((this.layoutDoc?._fitWidth) ||
            this._panelHeight / NumCast(this.layoutDoc?._nativeHeight) > this._panelWidth / NumCast(this.layoutDoc?._nativeWidth))) {
            scaling = this._panelWidth / NumCast(this.layoutDoc?._nativeWidth);
        } else if (nativeW && nativeH) {
            const wscale = this.panelWidth() / nativeW;
            scaling = wscale * nativeH > this._panelHeight ? this._panelHeight / nativeH : wscale;
        }
        return scaling;
    }

    ScreenToLocalTransform = () => {
        if (this._mainCont?.children) {
            const { translateX, translateY } = Utils.GetScreenTransform(this._mainCont.children[0]?.firstChild as HTMLElement);
            const scale = Utils.GetScreenTransform(this._mainCont).scale;
            return CollectionDockingView.Instance?.props.ScreenToLocalTransform().translate(-translateX, -translateY).scale(1 / this.contentScaling() / scale);
        }
        return Transform.Identity();
    }
    get previewPanelCenteringOffset() { return this.nativeWidth() ? (this._panelWidth - this.nativeWidth() * this.contentScaling()) / 2 : 0; }
    get widthpercent() { return this.nativeWidth() ? `${(this.nativeWidth() * this.contentScaling()) / this._panelWidth * 100}% ` : undefined; }

    // adds a tab to the layout based on the locaiton parameter which can be:
    //  close[:{left,right,top,bottom}]  - e.g., "close" will close the tab, "close:left" will close the left tab, 
    //  add[:{left,right,top,bottom}] - e.g., "add" will add a tab to the current stack, "add:right" will add a tab on the right
    //  replace[:{left,right,top,bottom,<any string>}] - e.g., "replace" will replace the current stack contents, 
    //                                  "replace:right" - will replace the stack on the right named "right" if it exists, or create a stack on the right with that name, 
    //                                   "replace:monkeys" - will replace any tab that has the label 'monkeys', or a tab with that label will be created by default on the right
    //  inPlace - will add the document to any collection along the path from the document to the docking view that has a field isInPlaceContainer. if none is found, inPlace adds a tab to current stack
    addDocTab = (doc: Doc, location: string, libraryPath?: Doc[]) => {
        SelectionManager.DeselectAll();
        if (doc._viewType === CollectionViewType.Docking) return CurrentUserUtils.openDashboard(Doc.UserDoc(), doc);
        const locationFields = location.split(":");
        const locationParams = locationFields.length > 1 ? locationFields[1] : "";
        switch (locationFields[0]) {
            case "close": return CollectionDockingView.CloseSplit(doc, locationParams);
            case "fullScreen": return CollectionDockingView.OpenFullScreen(doc);
            case "replace": return CollectionDockingView.ReplaceTab(doc, locationParams, this.stack);
            case "inPlace":
            case "add":
            default: return CollectionDockingView.AddSplit(doc, locationParams, this.stack);
        }
    }

    @computed get renderContentBounds() {
        const bounds = this._document ? Cast(this._document._renderContentBounds, listSpec("number"), [0, 0, this.returnMiniSize(), this.returnMiniSize()]) : [0, 0, 0, 0];
        const xbounds = bounds[2] - bounds[0];
        const ybounds = bounds[3] - bounds[1];
        const dim = Math.max(xbounds, ybounds);
        return { l: bounds[0] + xbounds / 2 - dim / 2, t: bounds[1] + ybounds / 2 - dim / 2, cx: bounds[0] + xbounds / 2, cy: bounds[1] + ybounds / 2, dim };
    }
    @computed get miniLeft() { return 50 + (NumCast(this._document?._panX) - this.renderContentBounds.cx) / this.renderContentBounds.dim * 100 - this.miniWidth / 2; }
    @computed get miniTop() { return 50 + (NumCast(this._document?._panY) - this.renderContentBounds.cy) / this.renderContentBounds.dim * 100 - this.miniHeight / 2; }
    @computed get miniWidth() { return this.panelWidth() / NumCast(this._document?._viewScale, 1) / this.renderContentBounds.dim * 100; }
    @computed get miniHeight() { return this.panelHeight() / NumCast(this._document?._viewScale, 1) / this.renderContentBounds.dim * 100; }
    childLayoutTemplate = () => Cast(this._document?.childLayoutTemplate, Doc, null);
    returnMiniSize = () => NumCast(this._document?._miniMapSize, 150);
    miniDown = (e: React.PointerEvent) => {
        this._document && setupMoveUpEvents(this, e, action((e: PointerEvent, down: number[], delta: number[]) => {
            this._document!._panX = clamp(NumCast(this._document!._panX) + delta[0] / this.returnMiniSize() * this.renderContentBounds.dim, this.renderContentBounds.l, this.renderContentBounds.l + this.renderContentBounds.dim);
            this._document!._panY = clamp(NumCast(this._document!._panY) + delta[1] / this.returnMiniSize() * this.renderContentBounds.dim, this.renderContentBounds.t, this.renderContentBounds.t + this.renderContentBounds.dim);
            return false;
        }), emptyFunction, emptyFunction);
    }
    getCurrentFrame = (): number => {
        const presTargetDoc = Cast(PresBox.Instance.childDocs[PresBox.Instance.itemIndex].presentationTargetDoc, Doc, null);
        return Cast(presTargetDoc._currentFrame, "number", null);
    }

    renderMiniMap() {
        return <div className="miniMap" style={{
            width: this.returnMiniSize(), height: this.returnMiniSize(), background: StrCast(this._document!._backgroundColor,
                StrCast(this._document!.backgroundColor, CollectionDockingView.Instance.props.backgroundColor?.(this._document!, 0))),
        }}>
            <CollectionFreeFormView
                Document={this._document!}
                LibraryPath={emptyPath}
                CollectionView={undefined}
                ContainingCollectionView={undefined}
                ContainingCollectionDoc={undefined}
                ChildLayoutTemplate={this.childLayoutTemplate} // bcz: Ugh .. should probably be rendering a CollectionView or the minimap should be part of the collectionFreeFormView to avoid havin to set stuff like this.
                noOverlay={true} // don't render overlay Docs since they won't scale
                active={returnTrue}
                select={emptyFunction}
                dropAction={undefined}
                isSelected={returnFalse}
                dontRegisterView={true}
                annotationsKey={""}
                fieldKey={Doc.LayoutFieldKey(this._document!)}
                bringToFront={emptyFunction}
                rootSelected={returnTrue}
                addDocument={returnFalse}
                moveDocument={returnFalse}
                removeDocument={returnFalse}
                ContentScaling={returnOne}
                PanelWidth={this.returnMiniSize}
                PanelHeight={this.returnMiniSize}
                NativeHeight={returnZero}
                NativeWidth={returnZero}
                ScreenToLocalTransform={this.ScreenToLocalTransform}
                renderDepth={0}
                whenActiveChanged={emptyFunction}
                focus={emptyFunction}
                backgroundColor={CollectionDockingView.Instance.props.backgroundColor}
                addDocTab={this.addDocTab}
                pinToPres={TabDocView.PinDoc}
                docFilters={CollectionDockingView.Instance.docFilters}
                searchFilterDocs={CollectionDockingView.Instance.searchFilterDocs}
                fitToBox={true}
            />
            <div className="miniOverlay" onPointerDown={this.miniDown} >
                <div className="miniThumb" style={{
                    width: `${this.miniWidth}% `,
                    height: `${this.miniHeight}% `,
                    left: `${this.miniLeft}% `,
                    top: `${this.miniTop}% `,
                }}
                />
            </div>
        </div>;
    }
    focusFunc = (doc: Doc, willZoom: boolean, scale?: number, afterFocus?: () => void) => afterFocus?.();
    setView = action((view: DocumentView) => this._view = view);
    @computed get docView() {
        TraceMobx();
        return !this._document ? (null) :
            <><DocumentView key={this._document[Id]}
                LibraryPath={emptyPath}
                Document={this._document}
                getView={this.setView}
                DataDoc={!Doc.AreProtosEqual(this._document[DataSym], this._document) ? this._document[DataSym] : undefined}
                bringToFront={emptyFunction}
                rootSelected={returnTrue}
                addDocument={undefined}
                removeDocument={undefined}
                ContentScaling={this.contentScaling}
                PanelWidth={this.panelWidth}
                PanelHeight={this.panelHeight}
                NativeHeight={this.nativeHeight}
                NativeWidth={this.nativeWidth}
                ScreenToLocalTransform={this.ScreenToLocalTransform}
                renderDepth={0}
                parentActive={returnTrue}
                whenActiveChanged={emptyFunction}
                focus={this.focusFunc}
                backgroundColor={CollectionDockingView.Instance.props.backgroundColor}
                addDocTab={this.addDocTab}
                pinToPres={TabDocView.PinDoc}
                docFilters={CollectionDockingView.Instance.docFilters}
                searchFilterDocs={CollectionDockingView.Instance.searchFilterDocs}
                ContainingCollectionView={undefined}
                ContainingCollectionDoc={undefined} />
                {this._document._viewType === CollectionViewType.Freeform && !this._document?.hideMinimap ? this.renderMiniMap() : (null)}
            </>;
    }

    render() {
        return (<div className="collectionDockingView-content" ref={ref => {
            if (this._mainCont = ref) {
                (this._mainCont as any).InitTab = (tab: any) => this.init(tab, this._document);
                this.tab && DocServer.GetRefField(this.tab.contentItem.config.props.documentId).then(action(doc => doc instanceof Doc && (this._document = doc) && this.init(this.tab, this._document)));
            }
        }}
            style={{
                transform: `translate(${this.previewPanelCenteringOffset}px, 0px)`,
                height: this.layoutDoc?._fitWidth ? undefined : "100%",
                width: this.widthpercent
            }}>
            {this.docView}
        </div >);
    }
}