import { Autocomplete, GoogleMap, GoogleMapProps, InfoWindow, Marker } from '@react-google-maps/api';
import { action, computed, IReactionDisposer, observable, ObservableMap } from 'mobx';
import { observer } from "mobx-react";
import * as React from "react";
import { DataSym, Doc, DocListCast, FieldsSym, WidthSym } from '../../../../fields/Doc';
import { documentSchema } from '../../../../fields/documentSchemas';
import { makeInterface } from '../../../../fields/Schema';
import { NumCast, StrCast } from '../../../../fields/Types';
import { emptyFunction, setupMoveUpEvents } from '../../../../Utils';
import { Docs } from '../../../documents/Documents';
import { DragManager } from '../../../util/DragManager';
import { ViewBoxAnnotatableComponent, ViewBoxAnnotatableProps } from '../../DocComponent';
import { AnchorMenu } from '../../pdf/AnchorMenu';
import { SidebarAnnos } from '../../SidebarAnnos';
import { StyleProp } from '../../StyleProvider';
import { FieldView, FieldViewProps } from '../FieldView';
import "./MapBox.scss";
import { MapMarker } from './MapMarker';
import { DocumentType } from '../../../documents/DocumentTypes';
import { identity } from 'lodash';
import { Id } from '../../../../fields/FieldSymbols';
import { Colors } from '../../global/globalEnums';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';

type MapDocument = makeInterface<[typeof documentSchema]>;
const MapDocument = makeInterface(documentSchema);

export type Coordinates = {
    lat: number,
    lng: number,
}

export type LocationData = {
    id: string;
    pos: Coordinates;
};

const mapContainerStyle = {
    height: '100%',
};

const defaultCenter = {
    lat: 38.685,
    lng: -115.234,
};

const mapOptions = {
    fullscreenControl: false,
}

const drawingManager = new google.maps.drawing.DrawingManager({
    drawingControl: true,
    drawingControlOptions: {
        position: google.maps.ControlPosition.TOP_RIGHT,
        drawingModes: [
            google.maps.drawing.OverlayType.MARKER,
            // currently we are not supporting the following drawing mode on map, a thought for future development
            // google.maps.drawing.OverlayType.CIRCLE,
            // google.maps.drawing.OverlayType.POLYLINE,
        ],
    },
});

const options = {
    fields: ["formatted_address", "geometry", "name"], // note: level of details is charged by item per retrieval, not recommended to return all fields
    strictBounds: false,
    types: ["establishment"], // type pf places, subject of change according to user need
} as google.maps.places.AutocompleteOptions;

@observer
export class MapBox extends ViewBoxAnnotatableComponent<ViewBoxAnnotatableProps & FieldViewProps & Partial<GoogleMapProps>, MapDocument>(MapDocument) {
    private _dropDisposer?: DragManager.DragDropDisposer;
    private _disposers: { [name: string]: IReactionDisposer } = {};
    public static LayoutString(fieldKey: string) { return FieldView.LayoutString(MapBox, fieldKey); }

    @observable private _map: google.maps.Map = null as unknown as google.maps.Map;
    @observable private selectedPlace: MapMarker | undefined;
    @observable private markerMap: { [id: string]: google.maps.Marker } = {};
    @observable private center = navigator.geolocation ? navigator.geolocation.getCurrentPosition : defaultCenter;
    @observable private zoom = 2.5;
    @observable private infoWindowOpen = false;
    @observable private bounds = new window.google.maps.LatLngBounds();
    @observable private inputRef = React.createRef<HTMLInputElement>();
    @observable private searchMarkers: google.maps.Marker[] = [];
    @observable private searchBox = new window.google.maps.places.Autocomplete(this.inputRef.current!, options);
    @observable private _savedAnnotations = new ObservableMap<number, HTMLDivElement[]>();
    @computed get allSidebarDocs() { return DocListCast(this.dataDoc[this.SidebarKey]); };
    @computed get allMapMarkers() { return DocListCast(this.dataDoc[this.annotationKey]); };
    @observable private allMarkers: Doc[] = [];
    //TODO: change all markers to a filter function to change 


    @observable _showSidebar = false;
    @computed get SidebarShown() { return this._showSidebar || this.layoutDoc._showSidebar ? true : false; }

    static _canAnnotate = true;
    static _hadSelection: boolean = false;
    private _sidebarRef = React.createRef<SidebarAnnos>();
    private _ref: React.RefObject<HTMLDivElement> = React.createRef();

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

    @action
    private setSearchBox = (searchBox: any) => {
        this.searchBox = searchBox;
    }

    // iterate allMarkers to size, center, and zoom map to contain all markers
    private fitBounds = (map: google.maps.Map) => {
        console.log('map bound is:' + this.bounds);
        this.allMarkers.map(place => {
            this.bounds.extend({ lat: NumCast(place.lat), lng: NumCast(place.lng) });
            return place._markerId;
        });
        map.fitBounds(this.bounds)
    }


    private hasGeolocation = (doc: Doc) => {
        return doc.type === DocumentType.IMG

    }


    /**
     * A function that examines allMapMarkers docs in the map node and form MapMarkers
     */
    private fillMarkers = () => {
        this.allMapMarkers?.forEach(doc => {
            // search for if the map marker exists, else create marker
            if (doc.lat !== undefined && doc.lng !== undefined) {
                const marker = Docs.Create.MapMarkerDocument(NumCast(doc.lat), NumCast(doc.lng), [doc], {})
                this.allMarkers.push(marker)
            }
        })
    }

    // TODO: things to ask & think about when designing
    // 1. All markers are stored in allMarkers[], when adding a new marker (from a button, ideally not using drawManager),
    // the new marker will be stored in allMarkers[]
    // currently markerloadhandler only gets called when the map is reloaded, but we want it to be update on the GUI in real time
    // TODO ** core issue --> real time updates ** 


    /**
     * store a reference to google map instance
     * setup the drawing manager on the top right corner of map
     * fit map bounds to contain all markers 
     * @param map 
     */
    @action
    private loadHandler = (map: google.maps.Map) => {
        this._map = map;
        drawingManager.setMap(map);
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(
                (position: GeolocationPosition) => {
                    const pos = {
                        lat: position.coords.latitude,
                        lng: position.coords.longitude,
                    };
                    this._map.setCenter(pos);
                }
            );
        } else {
            alert("Your geolocation is not supported by browser.")
        }
        this.fitBounds(map);
        this.fillMarkers();
        // this._map.addListener(drawingManager, 'markercomplete', this.addMarker)
    }

    //TODO: Is this a valid way for adding marker from drawing manager..? If so, how do we update the allMarkers & render so info window appears
    @action
    private addMarker = (marker: google.maps.Marker) => {
        const markerPosition = marker.getPosition();
        const newMapMarker = Docs.Create.MapMarkerDocument(NumCast(markerPosition?.lat()), NumCast(markerPosition?.lng()), [], {})
        this.allMarkers.push(newMapMarker)
    }

    @action
    private markerLoadHandler = (marker: google.maps.Marker, place: Doc) => {
        place[Id] ? this.markerMap[place[Id]] = marker : null;
    }

    @action
    private markerClickHandler = (e: MouseEvent, place: any) => {
        // set which place was clicked
        this.selectedPlace = place;

        console.log(this.selectedPlace);

        // used so clicking a second marker works
        if (this.infoWindowOpen) {
            this.infoWindowOpen = false;
            console.log("closeinfowindow")
        }
        this.infoWindowOpen = true;
        console.log("open infowindow")
    }

    /**
     * Called when dragging documents into map sidebar
     * @param doc 
     * @param sidebarKey 
     * @returns 
     */
    sidebarAddDocument = (doc: Doc | Doc[], sidebarKey?: string) => {
        if (!this.layoutDoc._showSidebar) this.toggleSidebar();
        const docs = doc instanceof Doc ? [doc] : doc
        docs.forEach(doc => {
            if (doc.lat !== undefined && doc.lng !== undefined) {
                const marker = Docs.Create.MapMarkerDocument(NumCast(doc.lat), NumCast(doc.lng), [], {})
                this.addDocument(marker, this.annotationKey)
            }
        }) //add to annotation list
        return this.addDocument(doc, sidebarKey); // add to sidebar list
    }

    /**
     * What does this do exactly? How to operate on sidebar?
     * @param e 
     */
    sidebarBtnDown = (e: React.PointerEvent) => {
        setupMoveUpEvents(this, e, (e, down, delta) => {
            const localDelta = this.props.ScreenToLocalTransform().scale(this.props.scaling?.() || 1).transformDirection(delta[0], delta[1]);
            const nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
            const curNativeWidth = NumCast(this.layoutDoc.nativeWidth, nativeWidth);
            const ratio = (curNativeWidth + localDelta[0] / (this.props.scaling?.() || 1)) / nativeWidth;
            if (ratio >= 1) {
                this.layoutDoc.nativeWidth = nativeWidth * ratio;
                this.layoutDoc._width = this.layoutDoc[WidthSym]() + localDelta[0];
                this.layoutDoc._showSidebar = nativeWidth !== this.layoutDoc._nativeWidth;
            }
            return false;
        }, emptyFunction, this.toggleSidebar);
    }

    sidebarWidth = () => Number(this.sidebarWidthPercent.substring(0, this.sidebarWidthPercent.length - 1)) / 100 * this.props.PanelWidth();
    @computed get sidebarWidthPercent() { return StrCast(this.layoutDoc._sidebarWidthPercent, "0%"); }
    @computed get sidebarColor() { return StrCast(this.layoutDoc.sidebarColor, StrCast(this.layoutDoc[this.props.fieldKey + "-backgroundColor"], "#e4e4e4")); }


    /**
     * function that reads the place inputed from searchbox, then zoom in on the location that's been autocompleted;
     * add a customized temporary marker on the map
     */
    @action
    private handlePlaceChanged = () => {
        console.log(this.searchBox);
        const place = this.searchBox.getPlace();

        if (!place.geometry || !place.geometry.location) {
            // user entered the name of a place that wasn't suggested & pressed the enter key, or place details request failed
            window.alert("No details available for input: '" + place.name + "'");
            return;
        }

        // zoom in on the location of the search result
        if (place.geometry.viewport) {
            console.log(this._map);
            this._map.fitBounds(place.geometry.viewport);
        } else {
            console.log(this._map);
            this._map.setCenter(place.geometry.location);
            this._map.setZoom(17);
        }

        // customize icon => customized icon for the nature of the location selected
        const icon = {
            url: place.icon as string,
            size: new google.maps.Size(71, 71),
            origin: new google.maps.Point(0, 0),
            anchor: new google.maps.Point(17, 34),
            scaledSize: new google.maps.Size(25, 25),
        };

        // put temporary cutomized marker on searched location
        this.searchMarkers.forEach((marker) => {
            marker.setMap(null);
        });
        this.searchMarkers = [];
        this.searchMarkers.push(
            new window.google.maps.Marker({
                map: this._map,
                icon,
                title: place.name,
                position: place.geometry.location,
            })
        )
    }


    @action
    private handleInfoWindowClose = () => {
        if (this.infoWindowOpen) {
            this.infoWindowOpen = false;
        }
        this.infoWindowOpen = false;
        this.selectedPlace = undefined;
    }

    public get SidebarKey() { return this.fieldKey + "-sidebar"; }

    @computed get sidebarHandle() {
        const annotated = DocListCast(this.dataDoc[this.SidebarKey]).filter(d => d?.author).length;
        //&& !this.isContentActive()
        return (!annotated) ? (null) : <div className="mapBox-sidebar-handle" onPointerDown={this.sidebarDown}
            style={{
                left: `max(0px, calc(100% - ${this.sidebarWidthPercent} ${this.sidebarWidth() ? "- 5px" : "- 10px"}))`,
                background: this.props.styleProvider?.(this.rootDoc, this.props as any, StyleProp.WidgetColor + (annotated ? ":annotated" : ""))
            }} />;
    }

    @action
    toggleSidebar = () => {
        const prevWidth = this.sidebarWidth();
        this.layoutDoc._showSidebar = ((this.layoutDoc._sidebarWidthPercent = StrCast(this.layoutDoc._sidebarWidthPercent, "0%") === "0%" ? "50%" : "0%")) !== "0%";
        this.layoutDoc._width = this.layoutDoc._showSidebar ? NumCast(this.layoutDoc._width) * 2 : Math.max(20, NumCast(this.layoutDoc._width) - prevWidth);
    }
    sidebarDown = (e: React.PointerEvent) => {
        setupMoveUpEvents(this, e, this.sidebarMove, emptyFunction, () => setTimeout(this.toggleSidebar), false);
    }
    sidebarMove = (e: PointerEvent, down: number[], delta: number[]) => {
        const bounds = this._ref.current!.getBoundingClientRect();
        this.layoutDoc._sidebarWidthPercent = "" + 100 * Math.max(0, (1 - (e.clientX - bounds.left) / bounds.width)) + "%";
        this.layoutDoc._showSidebar = this.layoutDoc._sidebarWidthPercent !== "0%";
        e.preventDefault();
        return false;
    }

    // TODO what's the difference between savedAnnotations & allMapMarkers?
    getAnchor = () => {
        const anchor =
            AnchorMenu.Instance?.GetAnchor(this._savedAnnotations) ??
            this.rootDoc // if anchormenu pops up else return rootDoc (map)
        // Docs.Create.MapMarkerDocument(this.allMapMarkers, {
        //     title: StrCast(this.rootDoc.title + " " + this.layoutDoc._scrollTop),
        //     annotationOn: this.rootDoc,
        //     y: NumCast(this.layoutDoc._scrollTop),
        // });
        // this.addDocument(anchor);
        return anchor;
    }

    private saveMarkerInfo = () => {

    }
    // create marker prop --> func that 
    private renderMarkers = () => {
        return this.allMarkers.map(place => (
            <Marker
                key={place[Id]}
                position={{ lat: NumCast(place.lat), lng: NumCast(place.lng) }}
                onLoad={marker => this.markerLoadHandler(marker, place)}
                onClick={e => this.markerClickHandler(e, place)}
            />
        ))
    }

    private renderInfoWindow = () => {
        return this.infoWindowOpen && this.selectedPlace && (
            <InfoWindow
                anchor={this.markerMap[this.selectedPlace._markerId!]}
                onCloseClick={this.handleInfoWindowClose}
            >
                <div style={{ backgroundColor: 'white', opacity: 0.75, padding: 12 }}>
                    <div style={{ fontSize: 16 }}>
                        <div>
                            {/* {// TODO need to figure out how to render these childDocs of the MapMarker in InfoWindow
                                marker.childDocs} */}
                            <hr />
                            <form>
                                <label>Title: </label><br />
                                <input type="text" id="title" name="title"></input><br />
                                <label>Desription: </label><br />
                                <textarea style={{ height: 150 }} id="description" name="description" placeholder="Notes, a short description of this location, a brief comment, etc."></textarea>
                                <button type="submit">Save</button>
                            </form>
                            <hr />
                            <div>
                                <button>New link+</button>
                            </div>
                        </div>
                    </div>
                </div>
            </InfoWindow>
        )
    }

    render() {
        return <div className="mapBox" ref={this._ref}
        // style={{ pointerEvents: this.isContentActive() ? undefined : "none" }} 
        >
            {/* // {/* <LoadScript
                //     googleMapsApiKey={process.env.GOOGLE_MAPS!}
                //     libraries={['places', 'drawing']}
                // >  */}
            <div className="mapBox-wrapper"
                onWheel={e => e.stopPropagation()}
                onPointerDown={e => (e.button === 0 && !e.ctrlKey) && e.stopPropagation()}
                style={{ width: `calc(100% - ${this.sidebarWidthPercent})` }}>
                <GoogleMap
                    mapContainerStyle={mapContainerStyle}
                    zoom={this.zoom}
                    // center={this.center}
                    onLoad={map => this.loadHandler(map)}
                    options={mapOptions}
                >
                    <Autocomplete
                        onLoad={this.setSearchBox}
                        onPlaceChanged={this.handlePlaceChanged}>
                        <input ref={this.inputRef} className="searchbox" type="text" placeholder="Search anywhere:" />
                    </Autocomplete>

                    {this.renderMarkers()}
                    {this.renderInfoWindow()}
                </GoogleMap>
            </div>
            {/* {/* </LoadScript > */}
            <div className="mapBox-sidebar"
                style={{ width: `${this.sidebarWidthPercent}`, backgroundColor: `${this.sidebarColor}` }}>
                <SidebarAnnos ref={this._sidebarRef}
                    {...this.props}
                    fieldKey={this.annotationKey}
                    rootDoc={this.rootDoc}
                    layoutDoc={this.layoutDoc}
                    dataDoc={this.dataDoc}
                    showSidebar={this.SidebarShown}
                    nativeWidth={NumCast(this.layoutDoc._nativeWidth)}
                    whenChildContentsActiveChanged={this.whenChildContentsActiveChanged}
                    PanelWidth={this.sidebarWidth}
                    sidebarAddDocument={this.sidebarAddDocument}
                    moveDocument={this.moveDocument}
                    removeDocument={this.removeDocument}
                //isContentActive={this.isContentActive}
                />
            </div>
            <div className="mapBox-overlayButton-sidebar" key="sidebar" title="Toggle Sidebar"
                style={{
                    display: !this.props.isContentActive() ? "none" : undefined,
                    top: StrCast(this.rootDoc._showTitle) === "title" ? 20 : 5,
                    backgroundColor: this.SidebarShown ? Colors.MEDIUM_BLUE : Colors.BLACK
                }}
                onPointerDown={this.sidebarBtnDown} >
                <FontAwesomeIcon style={{ color: Colors.WHITE }} icon={"comment-alt"} size="sm" />
            </div>
            {this.sidebarHandle}
        </div>;
    }
}