import { action, computed, makeObservable, observable, ObservableMap } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { Handles, Rail, Slider, Ticks, Tracks } from 'react-compound-slider';
import { AiOutlineMinusSquare, AiOutlinePlusSquare } from 'react-icons/ai';
import { CiCircleRemove } from 'react-icons/ci';
import Select from 'react-select';
import { Doc, DocListCast, Field, LinkedTo, StrListCast } from '../../fields/Doc';
import { Id } from '../../fields/FieldSymbols';
import { List } from '../../fields/List';
import { RichTextField } from '../../fields/RichTextField';
import { DocOptions, FInfo } from '../documents/Documents';
import { DocumentManager } from '../util/DocumentManager';
import { UserOptions } from '../util/GroupManager';
import { SearchUtil } from '../util/SearchUtil';
import { SettingsManager } from '../util/SettingsManager';
import { undoable } from '../util/UndoManager';
import './FilterPanel.scss';
import { FieldView } from './nodes/FieldView';
import { Handle, Tick, TooltipRail, Track } from './nodes/SliderBox-components';
import { ObservableReactComponent } from './ObservableReactComponent';

interface filterProps {
    Document: Doc;
}

@observer
export class FilterPanel extends ObservableReactComponent<filterProps> {
    public static LayoutString(fieldKey: string) {
        return FieldView.LayoutString(FilterPanel, fieldKey);
    }

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

    /**
     * @returns the relevant doc according to the value of FilterBox._filterScope i.e. either the Current Dashboard or the Current Collection
     */
    get targetDoc() {
        return this._props.Document;
    }
    @computed get targetDocChildKey() {
        const targetView = DocumentManager.Instance.getFirstDocumentView(this.targetDoc);
        return targetView?.ComponentView?.annotationKey ?? targetView?.ComponentView?.fieldKey ?? 'data';
    }
    @computed get targetDocChildren() {
        return [...DocListCast(this.targetDoc?.[this.targetDocChildKey] || Doc.ActiveDashboard?.data), ...DocListCast(this.targetDoc[Doc.LayoutFieldKey(this.targetDoc) + '_sidebar'])];
    }

    @computed get allDocs() {
        const allDocs = new Set<Doc>();
        const targetDoc = this.targetDoc;
        if (targetDoc) {
            SearchUtil.foreachRecursiveDoc([this.targetDoc], (depth, doc) => allDocs.add(doc));
        }
        return Array.from(allDocs);
    }

    @computed get _allFacets() {
        const noviceReqFields = ['author', 'tags', 'text', 'type', LinkedTo];
        const noviceLayoutFields: string[] = []; //["_layout_curPage"];
        const noviceFields = [...noviceReqFields, ...noviceLayoutFields];

        const keys = new Set<string>(noviceFields);
        this.allDocs.forEach(doc => SearchUtil.documentKeys(doc).filter(key => keys.add(key)));
        const sortedKeys = Array.from(keys.keys())
            .filter(key => key[0])
            .filter(key => key.indexOf('modificationDate') !== -1 || (key[0] === key[0].toUpperCase() && !key.startsWith('_')) || noviceFields.includes(key) || !Doc.noviceMode)
            .sort();

        noviceFields.forEach(key => sortedKeys.splice(sortedKeys.indexOf(key), 1));

        return [...noviceFields, ...sortedKeys];
    }

    @computed get rangeFilters() {
        return StrListCast(this.targetDoc?._childFiltersByRanges).filter((filter, i) => !(i % 3));
    }

    /**
     * activeFilters( ) -- all filters that currently have a filter set on them in this document (ranges, and others)
     * ["#tags::bob::check", "tags::joe::check", "width", "height"]
     */
    @computed get activeFilters() {
        return StrListCast(this.targetDoc?._childFilters).concat(this.rangeFilters);
    }

    @computed get mapActiveFiltersToFacets() {
        const filters = new Map<string, string>();
        //this.targetDoc.docFilters
        this.activeFilters.map(filter => filters.set(filter.split(Doc.FilterSep)[1], filter.split(Doc.FilterSep)[0]));
        return filters;
    }

    //
    // activeFacetHeaders() - just the facet names, not the rest of the filter
    //
    // this wants to return all the filter facets that have an existing filter set on them in order to show them in the rendered panel
    // this set may overlap the selectedFilters
    // if the components reloads, these will still exist and be shown

    // ["#tags", "width", "height"]
    //

    @computed get activeFacetHeaders() {
        const activeHeaders = new Array();
        this.activeFilters.map(filter => activeHeaders.push(filter.split(Doc.FilterSep)[0]));

        return activeHeaders;
    }
    /**
     * @returns a string array of the current attributes
     */
    // @computed get currentFacets() {
    //     return this.activeFilters.map(filter => filter.split(Doc.FilterSep)[0]);
    // }

    static gatherFieldValues(childDocs: Doc[], facetKey: string, childFilters: string[]) {
        const valueSet = new Set<string>(childFilters.map(filter => filter.split(Doc.FilterSep)[1]));
        let rtFields = 0;
        let subDocs = childDocs;
        if (subDocs.length > 0) {
            let newarray: Doc[] = [];
            while (subDocs.length > 0) {
                newarray = [];
                subDocs.forEach(t => {
                    const facetVal = t[facetKey];
                    if (facetVal instanceof RichTextField || typeof facetVal === 'string') rtFields++;
                    facetVal !== undefined && valueSet.add(Field.toString(facetVal as Field));
                    (facetVal === true || facetVal == false) && valueSet.add(Field.toString(!facetVal));
                    const fieldKey = Doc.LayoutFieldKey(t);
                    const annos = !Field.toString(Doc.LayoutField(t) as Field).includes('CollectionView');
                    DocListCast(t[annos ? fieldKey + '_annotations' : fieldKey]).forEach(newdoc => newarray.push(newdoc));
                    annos && DocListCast(t[fieldKey + '_sidebar']).forEach(newdoc => newarray.push(newdoc));
                });
                subDocs = newarray;
            }
        }
        //     }
        // });

        return { strings: Array.from(valueSet.keys()), rtFields };
    }

    public removeFilter = (filterName: string) => {
        Doc.setDocFilter(this.targetDoc, filterName, undefined, 'remove');
        Doc.setDocRangeFilter(this.targetDoc, filterName, undefined);
    };

    // @observable _chosenFacets = new ObservableMap<string, 'text' | 'checkbox' | 'slider' | 'range'>();
    @observable _chosenFacetsCollapse = new ObservableMap<string, boolean>();
    @observable _collapseReturnKeys = new Array();

    // this computed function gets the active filters and maps them to their headers

    //
    // activeRenderedFacetInfos()
    //    returns renderInfo for all user selected filters and for all existing filters set on the document
    // Map("tags" => {"checkbox"},
    //         "width" => {"rangs", domain:[1978,1992]})
    //

    @computed get activeRenderedFacetInfos() {
        return new Set(
            Array.from(new Set(Array.from(this._selectedFacetHeaders).concat(this.activeFacetHeaders))).map(facetHeader => {
                const facetValues = FilterPanel.gatherFieldValues(this.targetDocChildren, facetHeader, StrListCast(this.targetDoc.childFilters));

                let nonNumbers = 0;
                let minVal = Number.MAX_VALUE,
                    maxVal = -Number.MAX_VALUE;
                facetValues.strings.map(val => {
                    const num = val ? Number(val) : Number.NaN;
                    if (Number.isNaN(num)) {
                        val && nonNumbers++;
                    } else {
                        minVal = Math.min(num, minVal);
                        maxVal = Math.max(num, maxVal);
                    }
                });

                if (facetHeader === 'text') {
                    return { facetHeader, renderType: 'text' };
                } else if (facetHeader !== 'tags' && nonNumbers / facetValues.strings.length < 0.1) {
                    const extendedMinVal = minVal - Math.min(1, Math.floor(Math.abs(maxVal - minVal) * 0.1));
                    const extendedMaxVal = Math.max(minVal + 1, maxVal + Math.min(1, Math.ceil(Math.abs(maxVal - minVal) * 0.05)));
                    const ranged = Doc.readDocRangeFilter(this.targetDoc, facetHeader); // not the filter range, but the zooomed in range on the filter
                    return { facetHeader, renderType: 'range', domain: [extendedMinVal, extendedMaxVal], range: ranged ? ranged : [extendedMinVal, extendedMaxVal] };
                } else {
                    return { facetHeader, renderType: 'checkbox' };
                }
            })
        );
    }

    @observable _selectedFacetHeaders = new Set<string>();

    /**
     * user clicks on a filter facet because they want to see it.
     * this adds this chosen filter to a set of user selected filters called:  selectedFilters
     * if this component reloads, then these filters will go away since they haven't been written to any Doc anywhere
     *
     *   // this._selectedFacets.add(facetHeader);  .. add to Set() not array
     */

    @action
    facetClick = (facetHeader: string) => this._selectedFacetHeaders.add(facetHeader);

    @action
    sortingCurrentFacetValues = (facetHeader: string) => {
        this._collapseReturnKeys.splice(0);

        Array.from(this.activeRenderedFacetInfos.keys()).map(renderInfo => {
            if (renderInfo.renderType === 'range' && renderInfo.facetHeader === facetHeader && renderInfo.range) {
                this._collapseReturnKeys.push(renderInfo.range.map(number => number.toFixed(2)));
            }
        });

        for (var key of this.facetValues(facetHeader)) {
            if (this.mapActiveFiltersToFacets.get(key)) {
                this._collapseReturnKeys.push(key);
            }
        }

        return <div className=" filterbox-collpasedAndActive">{this._collapseReturnKeys.join(',  ')}</div>;
    };

    facetValues = (facetHeader: string) => {
        const allCollectionDocs = new Set<Doc>();
        SearchUtil.foreachRecursiveDoc(this.targetDocChildren, (depth: number, doc: Doc) => allCollectionDocs.add(doc));
        const set = new Set<string>([...StrListCast(this.targetDoc.childFilters).map(filter => filter.split(Doc.FilterSep)[1]), Doc.FilterNone, Doc.FilterAny]);
        if (facetHeader === 'tags')
            allCollectionDocs.forEach(child =>
                StrListCast(child[facetHeader])
                    .filter(h => h)
                    .forEach(key => set.add(key))
            );
        else
            allCollectionDocs.forEach(child => {
                const fieldVal = child[facetHeader] as Field;
                if (!(fieldVal instanceof List)) {
                    // currently we have no good way of filtering based on a field that is a list
                    set.add(Field.toString(fieldVal));
                    (fieldVal === true || fieldVal === false) && set.add((!fieldVal).toString());
                }
            });
        const facetValues = Array.from(set).filter(v => v);

        let nonNumbers = 0;

        facetValues.map(val => Number.isNaN(Number(val)) && nonNumbers++);
        return nonNumbers / facetValues.length > 0.1 ? facetValues.sort() : facetValues.sort((n1: string, n2: string) => Number(n1) - Number(n2));
    };

    @computed get fieldsDropdown() {
        const filteredOptions = ['author', 'tags', 'text', 'acl-Guest', ...this._allFacets.filter(facet => facet[0] === facet.charAt(0).toUpperCase())];

        Object.entries(DocOptions)
            .filter(opts => opts[1].filterable)
            .forEach((pair: [string, FInfo]) => filteredOptions.push(pair[0]));
        const options = filteredOptions.map(facet => ({ value: facet, label: facet }));

        return (
            <Select
                styles={{
                    control: (baseStyles, state) => ({
                        ...baseStyles,
                        color: SettingsManager.userColor,
                        background: SettingsManager.userBackgroundColor,
                    }),
                    placeholder: (baseStyles, state) => ({
                        ...baseStyles,
                        color: SettingsManager.userColor,
                        background: SettingsManager.userBackgroundColor,
                    }),
                    input: (baseStyles, state) => ({
                        ...baseStyles,
                        color: SettingsManager.userColor,
                        background: SettingsManager.userBackgroundColor,
                    }),
                    option: (baseStyles, state) => ({
                        ...baseStyles,
                        color: SettingsManager.userColor,
                        background: !state.isFocused ? SettingsManager.userBackgroundColor : SettingsManager.userVariantColor,
                    }),
                    menuList: (baseStyles, state) => ({
                        ...baseStyles,
                        backgroundColor: SettingsManager.userBackgroundColor,
                    }),
                }}
                placeholder={'add a filter'}
                options={options}
                isMulti={false}
                onChange={val => this.facetClick((val as UserOptions).value)}
                onKeyDown={e => e.stopPropagation()}
                //onMenuClose={onClose}
                value={null}
                closeMenuOnSelect={true}
            />
        );
    }

    render() {
        return (
            <div className="filterBox-treeView">
                <div className="filterBox-select">
                    <div style={{ width: '100%' }}>{this.fieldsDropdown}</div>
                    {/* THE FOLLOWING CODE SHOULD BE DEVELOPER FOR BOOLEAN EXPRESSION (AND / OR) */}
                    {/* <div className="filterBox-select-bool"> 
                        <select className="filterBox-selection" onChange={action(e => this.targetDoc && (this.targetDoc._childFilters_boolean = (e.target as any).value))} defaultValue={StrCast(this.targetDoc?.childFilters_boolean)}>
                            {['AND', 'OR'].map(bool => (
                                <option value={bool} key={bool}>
                                    {bool}
                                </option>
                            ))}
                        </select>
                    </div>{' '} */}
                </div>

                <div className="filterBox-tree" key="tree">
                    {Array.from(this.activeRenderedFacetInfos.keys()).map(
                        (
                            renderInfo // iterato over activeFacetRenderInfos  ==> renderInfo  which you can renderInfo.facetHeader
                        ) => (
                            <div>
                                <div className="filterBox-facetHeader">
                                    <div className="filterBox-facetHeader-Header"> </div>
                                    {renderInfo.facetHeader.charAt(0).toUpperCase() + renderInfo.facetHeader.slice(1)}

                                    <div
                                        className="filterBox-facetHeader-collapse"
                                        onClick={action(e => {
                                            const collapseBoolValue = this._chosenFacetsCollapse.get(renderInfo.facetHeader);
                                            this._chosenFacetsCollapse.set(renderInfo.facetHeader, !collapseBoolValue);
                                        })}>
                                        {this._chosenFacetsCollapse.get(renderInfo.facetHeader) ? <AiOutlinePlusSquare /> : <AiOutlineMinusSquare />}
                                    </div>

                                    <div
                                        className="filterBox-facetHeader-remove"
                                        onClick={action(e => {
                                            if (renderInfo.facetHeader === 'text') {
                                                Doc.setDocFilter(this.targetDoc, renderInfo.facetHeader, 'match', 'remove');
                                            } else {
                                                for (var key of this.facetValues(renderInfo.facetHeader)) {
                                                    if (this.mapActiveFiltersToFacets.get(key)) {
                                                        Doc.setDocFilter(this.targetDoc, renderInfo.facetHeader, key, 'remove');
                                                    }
                                                }
                                            }
                                            this._selectedFacetHeaders.delete(renderInfo.facetHeader);
                                            this._chosenFacetsCollapse.delete(renderInfo.facetHeader);

                                            if (renderInfo.domain) {
                                                Doc.setDocRangeFilter(this.targetDoc, renderInfo.facetHeader, renderInfo.domain, 'remove');
                                            }
                                        })}>
                                        <CiCircleRemove />{' '}
                                    </div>
                                </div>

                                {this._chosenFacetsCollapse.get(renderInfo.facetHeader)
                                    ? this.sortingCurrentFacetValues(renderInfo.facetHeader)
                                    : this.displayFacetValueFilterUIs(renderInfo.renderType, renderInfo.facetHeader, renderInfo.domain, renderInfo.range)}
                                {/*  */}
                            </div>
                        )
                    )}
                </div>
            </div>
        );
    }

    private displayFacetValueFilterUIs(type: string | undefined, facetHeader: string, renderInfoDomain?: number[] | undefined, renderInfoRange?: number[]): React.ReactNode {
        switch (type) {
            case 'text':
                return (
                    <input
                        key={this.targetDoc[Id]}
                        placeholder={'enter text to match'}
                        defaultValue={
                            StrListCast(this.targetDoc._childFilters)
                                .find(filter => filter.split(Doc.FilterSep)[0] === facetHeader)
                                ?.split(Doc.FilterSep)[1]
                        }
                        style={{ color: SettingsManager.userColor, background: SettingsManager.userBackgroundColor }}
                        onBlur={undoable(e => Doc.setDocFilter(this.targetDoc, facetHeader, e.currentTarget.value, !e.currentTarget.value ? 'remove' : 'match'), 'set text filter')}
                        onKeyDown={e => e.key === 'Enter' && undoable(e => Doc.setDocFilter(this.targetDoc, facetHeader, e.currentTarget.value, !e.currentTarget.value ? 'remove' : 'match'), 'set text filter')(e)}
                    />
                );
            case 'checkbox':
                return this.facetValues(facetHeader).map(fval => {
                    const facetValue = fval;
                    return (
                        <div>
                            <input
                                style={{ width: 20, marginLeft: 20 }}
                                checked={['check', 'exists'].includes(
                                    StrListCast(this.targetDoc._childFilters)
                                        .find(filter => filter.split(Doc.FilterSep)[0] === facetHeader && filter.split(Doc.FilterSep)[1] == facetValue)
                                        ?.split(Doc.FilterSep)[2] ?? ''
                                )}
                                type={type}
                                onChange={undoable(e => Doc.setDocFilter(this.targetDoc, facetHeader, fval, e.target.checked ? 'check' : 'remove'), 'set filter')}
                            />
                            {facetValue}
                        </div>
                    );
                });

            case 'range':
                const domain = renderInfoDomain;
                const range = renderInfoRange;

                if (range) {
                    console.log('this is info range ' + range[0] + ' , ' + range[1]);
                }

                if (domain) {
                    console.log('this is info domain ' + domain[0] + ', ' + domain[1]);

                    return (
                        <>
                            {/* <div className="sliderBox-outerDiv-checkBox" style={{ float: 'left' }}>
                                <Checkbox color="primary" onChange={action(() => console.log('on change'))} />
                            </div> */}

                            <div className="sliderBox-outerDiv" style={{ width: '95%', height: 45, float: 'right' }}>
                                <Slider
                                    mode={2}
                                    step={Math.min(1, 0.1 * (domain[1] - domain[0]))}
                                    domain={[domain[0], domain[1]]} // -1000, 1000
                                    rootStyle={{ position: 'relative', width: '100%' }}
                                    onChange={values => Doc.setDocRangeFilter(this.targetDoc, facetHeader, values)}
                                    values={renderInfoRange!}>
                                    <Rail>{railProps => <TooltipRail {...railProps} />}</Rail>
                                    <Handles>
                                        {({ handles, activeHandleID, getHandleProps }) => (
                                            <div className="slider-handles">
                                                {handles.map((handle, i) => {
                                                    // const value = i === 0 ? defaultValues[0] : defaultValues[1];
                                                    return (
                                                        <div>
                                                            <Handle key={handle.id} handle={handle} domain={domain} isActive={handle.id === activeHandleID} getHandleProps={getHandleProps} />
                                                        </div>
                                                    );
                                                })}
                                            </div>
                                        )}
                                    </Handles>
                                    <Tracks left={false} right={false}>
                                        {({ tracks, getTrackProps }) => (
                                            <div className="slider-tracks">
                                                {tracks.map(({ id, source, target }) => (
                                                    <Track key={id} source={source} target={target} disabled={false} getTrackProps={getTrackProps} />
                                                ))}
                                            </div>
                                        )}
                                    </Tracks>
                                    <Ticks count={5}>
                                        {({ ticks }) => (
                                            <div className="slider-ticks">
                                                {ticks.map(tick => (
                                                    <Tick key={tick.id} tick={tick} count={ticks.length} format={(val: number) => val.toString()} />
                                                ))}
                                            </div>
                                        )}
                                    </Ticks>
                                </Slider>
                            </div>
                        </>
                    );
                }

            // case 'range'
            // return <Slider ...
            //  return <slider domain={renderInfo.domain}> domain is number[] for min and max
            //         onChange = { ...     Doc.setDocRangeFilter(this.targetDoc, facetHeader, [extendedMinVal, extendedMaxVal] ) }
            //
            //  OR

            // return <div>
            //     <slider domain={renderInfo.domain}> // domain is number[] for min and max
            //     <dimain changing handles >
            //  <?div
        }
    }
}
