import { computed } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { Doc, DocListCast } from '../../fields/Doc';
import { Id } from '../../fields/FieldSymbols';
import { Cast, NumCast, StrCast } from '../../fields/Types';
import { CollectionViewType } from '../documents/DocumentTypes';
import { DocFocusOrOpen } from '../util/DocumentManager';
import { CollectionDockingView } from './collections/CollectionDockingView';
import { DocumentView } from './nodes/DocumentView';
import './PropertiesDocContextSelector.scss';

type PropertiesDocContextSelectorProps = {
    DocView?: DocumentView;
    Stack?: any;
    hideTitle?: boolean;
    addDocTab(doc: Doc, location: string): void;
};

@observer
export class PropertiesDocContextSelector extends React.Component<PropertiesDocContextSelectorProps> {
    @computed get _docs() {
        if (!this.props.DocView) return [];
        const target = this.props.DocView.props.Document;
        const targetContext = this.props.DocView.props.ContainingCollectionDoc;
        const aliases = DocListCast(target.aliases);
        const containerProtos = aliases.filter(alias => alias.context && alias.context instanceof Doc && Cast(alias.context, Doc, null) !== targetContext).reduce((set, alias) => set.add(Cast(alias.context, Doc, null)), new Set<Doc>());
        const containerSets = Array.from(containerProtos.keys()).map(container => DocListCast(container.aliases));
        const containers = containerSets.reduce((p, set) => {
            set.map(s => p.add(s));
            return p;
        }, new Set<Doc>());
        const doclayoutSets = Array.from(containers.keys()).map(dp => DocListCast(dp.aliases));
        const doclayouts = Array.from(
            doclayoutSets
                .reduce((p, set) => {
                    set.map(s => p.add(s));
                    return p;
                }, new Set<Doc>())
                .keys()
        );
        return doclayouts
            .filter(doc => !Doc.AreProtosEqual(doc, CollectionDockingView.Instance?.props.Document))
            .filter(doc => !Doc.IsSystem(doc))
            .map(doc => ({ col: doc, target }));
    }

    getOnClick = (col: Doc, target: Doc) => {
        if (!this.props.DocView) return;
        col = Doc.IsPrototype(col) ? Doc.MakeDelegate(col) : col;
        if (col._viewType === CollectionViewType.Freeform) {
            col._panX = NumCast(target.x) + NumCast(target._width) / 2;
            col._panY = NumCast(target.y) + NumCast(target._height) / 2;
        }
        col.hidden = false;
        this.props.addDocTab(col, 'toggle:right');
        setTimeout(() => DocFocusOrOpen(Doc.GetProto(this.props.DocView!.props.Document), col), 100);
    };

    render() {
        return (
            <div>
                {this.props.hideTitle ? null : <p key="contexts">Contexts:</p>}
                {this._docs.map(doc => (
                    <p key={doc.col[Id] + doc.target[Id]}>
                        <a onClick={() => this.getOnClick(doc.col, doc.target)}>{StrCast(doc.col.title)}</a>
                    </p>
                ))}
            </div>
        );
    }
}