import * as React from 'react';
import { CollectionSubView } from "./CollectionSubView";
import { observer } from 'mobx-react';
import { computed, makeObservable, observable } from 'mobx';
import { Doc, DocListCast, Opt } from '../../../fields/Doc';
import { CollectionStackingView } from './CollectionStackingView';
import { CollectionViewType } from '../../documents/DocumentTypes';
import { dateRangeStrToDates, emptyFunction, returnAll, returnEmptyDoclist, returnNone, returnOne, returnTrue } from '../../../Utils';
import { DocumentView, DocumentViewProps } from '../nodes/DocumentView';
import { TbRuler } from 'react-icons/tb';
import { Transform } from '../../util/Transform';
import { DocData } from '../../../fields/DocSymbols';
import { Cast, NumCast, StrCast } from '../../../fields/Types';
import { StyleProp } from '../StyleProvider';
import { CollectionFreeFormDocumentView } from '../nodes/CollectionFreeFormDocumentView';

@observer
export class CollectionCalendarView extends CollectionSubView(){

    constructor(props: any){
        super(props);
        makeObservable(this);
    }

    componentDidMount(): void {
        
    }

    componentWillUnmount(): void {
        
    }

    @computed get allCalendars(){
        return this.childDocs; // returns a list of docs (i.e. calendars)
    }

    removeCalendar = () => {

    }

    addCalendar = (doc: Doc | Doc[], annotationKey?: string | undefined): boolean => {
        // bring up calendar modal with option to create a calendar 
        return true;
    }

    _stackRef = React.createRef<CollectionStackingView>();

    panelHeight = () => {
        return 0; // a standard height for all calendars; TODO: change
    }

    panelWidth = () => {
        return 0; //a standard width for all calendars; TODO: change
    }

    // most recent calendar should come first
    sortByMostRecentDate = (calendarA: Doc, calendarB: Doc) => {
        const aDateRangeStr = StrCast(calendarA.date_range);
        const bDateRangeStr = StrCast(calendarB.date_range);

        const [aFromDate, aToDate] = dateRangeStrToDates(aDateRangeStr);
        const [bFromDate, bToDate] = dateRangeStrToDates(bDateRangeStr);
        
        if (aFromDate > bFromDate) { 
            return -1; // a comes first
        } else if (aFromDate < bFromDate) {
            return 1; // b comes first
        } else { // start dates are the same
            if (aToDate > bToDate) {
                return -1; // a comes first
            } else if (aToDate < bToDate) {
                return 1; // b comes first
            } else {
                return 0; // same start and end dates
            }
        }


    }

    

    screenToLocalTransform = () =>
        this._props
            .ScreenToLocalTransform()
            .translate(Doc.NativeWidth(this._props.Document), 0)
            .scale(this._props.NativeDimScaling?.() || 1);

    get calendarsKey() {
        return this._props.fieldKey + '_calendars';
    }

    render(){
        return (
            <div>
                 <CollectionStackingView
                        {...this._props}
                        setContentView={emptyFunction}
                        // NativeWidth={}
                        // NativeHeight={returnZero}
                        ref={this._stackRef}
                        PanelHeight={this.panelHeight}
                        PanelWidth={this.panelWidth}
                        // childFilters={this.childFilters} DO I NEED THIS?
                        sortFunc={this.sortByMostRecentDate}
                        setHeight={this.setHeightCallback}
                        isAnnotationOverlay={false}
                        // select={emptyFunction} What does this mean?
                        NativeDimScaling={returnOne}
                        isAnyChildContentActive={returnTrue} // ??
                        // childDocumentsActive={}
                        // whenChildContentsActiveChanged={}
                        childHideDecorationTitle={false}
                        removeDocument={this.removeDocument} // will calendar automatically be removed from myCalendars
                        moveDocument={this.moveDocument}
                        addDocument={this.addCalendar}
                        ScreenToLocalTransform={this.screenToLocalTransform}
                        renderDepth={this._props.renderDepth + 1}
                        type_collection={CollectionViewType.Stacking}
                        fieldKey={this.calendarsKey}
                        pointerEvents={returnAll}
                    />
            </div>

        )
    }
}