import { Component, OnInit, OnDestroy, HostListener, Inject, ViewChild, AfterViewInit,ChangeDetectorRef } from '@angular/core';
import { Location } from '@angular/common';
import { Observable, Subject, Subscription,combineLatest, from } from 'rxjs';
import { debounce, withLatestFrom, first, combineAll } from 'rxjs/operators';
import { Router, ActivatedRoute, ParamMap, Event } from '@angular/router';
import { Store } from '@ngrx/store';
//import { proj,Map } from 'openlayers';

// Map
import * as mapReducers from '../../reducers/map.reducer';
import * as mapActions from '../../actions/map.actions';
import { IMapState} from '../../models/map.state';
import { ISelectedFeatures } from '../../models/selected.features';
import { IItemLayer } from '../../models/item.layer';
import { IQueryState } from '../../models/query.state';
import { IPeriodState } from '../../models/period.state';
import { IDroppedFile } from '../aol/file-drop-target/file-drop-target.component';
import { IMetaData } from '../meta-data-modal/meta-data-modal.component';
import { StateSerializerService } from '../../services/state-serializer.service';
import { GeolocationService} from '../../services/geolocation.service';

// AppCommon
import { ResumableFileUploadService, ItemTypeService } from '@farmmaps/common';
import { IItemType, IItem } from '@farmmaps/common';
import {commonReducers} from '@farmmaps/common';
import {commonActions} from '@farmmaps/common';

import {Feature} from 'ol';
import {Extent,createEmpty,extend } from 'ol/extent';
import {transform} from 'ol/proj';
import { query } from '@angular/animations';
import { tassign } from 'tassign';


@Component({
  selector: 'fm-map-map',
  templateUrl: './map.component.html',
  styleUrls: ['./map.component.scss']
})

export class MapComponent implements OnInit, OnDestroy,AfterViewInit {
  title: string = 'Map';
  public openedModalName: Observable<string>;
  public itemTypes: Observable<{ [id: string]: IItemType }>;
  public mapState: Observable<IMapState>;
  public features: Observable<Array<Feature>>;
  public overlayLayers: Observable<Array<IItemLayer>>;
  public selectedOverlayLayer: Observable<IItemLayer>;
  public selectedItemLayer: Observable<IItemLayer>;
  public baseLayers: Observable<Array<IItemLayer>>;
  public selectedBaseLayer: Observable<IItemLayer>;
  public projection: Observable<string>;
  public selectedFeatures: Subject<ISelectedFeatures> = new Subject<ISelectedFeatures>();
  public droppedFile: Subject<IDroppedFile>  = new Subject<IDroppedFile>();
  private paramSub: Subscription;
  private itemTypeSub: Subscription;
  private mapStateSub: Subscription;
  private queryStateSub: Subscription;
  public parentCode: Observable<string>;
  public panelVisible: Observable<boolean>;
  public panelCollapsed: Observable<boolean>;
  public selectedFeature: Observable<Feature>;
  public selectedItem: Observable<IItem>;
  public queryState: Observable<IQueryState>;
  public period: Observable<IPeriodState>;
  public clearEnabled: Observable<boolean>;
  public searchCollapsed: Observable<boolean>;
  public searchMinified: Observable<boolean>;
  public menuVisible: Observable<boolean>;
  public query: Observable<IQueryState>;
  public position: Observable<Position>;
  public baseLayersCollapsed:boolean = true;
  public overlayLayersCollapsed: boolean = true;
  public extent: Observable<Extent>;
  @ViewChild('map', { static: true }) map;
  
  constructor(private store: Store<mapReducers.State | commonReducers.State>, 
    private route: ActivatedRoute, 
    private router: Router,
    private uploadService: ResumableFileUploadService, 
    private serializeService: StateSerializerService, 
    public itemTypeService: ItemTypeService, 
    private location: Location, 
    private geolocationService: GeolocationService,
    private _ref: ChangeDetectorRef ) {
  }

  @HostListener('document:keyup', ['$event'])
  escapeClose(event: KeyboardEvent) {
    let x = event.keyCode;
    if (x === 27) {
      this.handleCloseModal()
    }
  }

  handleOpenModal(modalName: string) {
    this.store.dispatch(new  commonActions.OpenModal(modalName));
  }

  handleCloseModal() {
    this.store.dispatch(new commonActions.CloseModal());
  }

  handleFileDropped(droppedFile: IDroppedFile) {
    this.uploadService.addFiles(droppedFile.files, droppedFile.event, { parentCode:droppedFile.parentCode, geometry:droppedFile.geometry });
  }

  handleFeaturesSelected(feature: Feature) {
    if (feature) {
      let newQuery = tassign(mapReducers.initialQueryState, { itemCode: feature.get('code') });
      this.store.dispatch(new mapActions.DoQuery(newQuery));
    }
  }

  handleSearch(queryState: IQueryState) {
    this.store.dispatch(new mapActions.DoQuery(queryState));
  }

  ngOnInit() {
    this.store.dispatch(new mapActions.Init());
    this.selectedFeatures.next({x:0,y:0,features:[]});
    this.mapState = this.store.select(mapReducers.selectGetMapState);
    this.parentCode = this.store.select(mapReducers.selectGetParentCode);
    this.features = this.store.select(mapReducers.selectGetFeatures);
    this.overlayLayers = this.store.select(mapReducers.selectGetOverlayLayers);
    this.selectedOverlayLayer = this.store.select(mapReducers.selectGetSelectedOverlayLayer);
    this.baseLayers = this.store.select(mapReducers.selectGetBaseLayers);
    this.projection = this.store.select(mapReducers.selectGetProjection);
    this.selectedBaseLayer = this.store.select(mapReducers.selectGetSelectedBaseLayer);
    this.panelVisible = this.store.select(mapReducers.selectGetPanelVisible);
    this.panelCollapsed = this.store.select(mapReducers.selectGetPanelCollapsed);
    this.selectedFeature = this.store.select(mapReducers.selectGetSelectedFeature);
    this.selectedItem = this.store.select(mapReducers.selectGetSelectedItem);
    this.queryState = this.store.select(mapReducers.selectGetQueryState);
    this.clearEnabled = this.store.select(mapReducers.selectGetClearEnabled);
    this.searchCollapsed = this.store.select(mapReducers.selectGetSearchCollapsed);
    this.searchMinified = this.store.select(mapReducers.selectGetSearchMinified);
    this.menuVisible = this.store.select(mapReducers.selectGetMenuVisible);
    this.openedModalName = this.store.select(commonReducers.selectOpenedModalName);
    this.query = this.store.select(mapReducers.selectGetQuery);
    this.extent = this.store.select(mapReducers.selectGetExtent);
    this.selectedFeatures.next(null);
    this.selectedItemLayer = this.store.select(mapReducers.selectGetSelectedItemLayer);
    this.period = this.store.select(mapReducers.selectGetPeriod);
    this.position = this.geolocationService.getCurrentPosition();

    this.mapState.pipe(withLatestFrom(this.queryState)).subscribe((state) => {
      this.replaceUrl(state[0], state[1], true);
    });
    this.query.pipe(withLatestFrom(this.mapState)).subscribe((state) => {
      this.replaceUrl(state[1], state[0],false);
    });
  }

  private stateSetCount: number = 0;
  private lastQueryState: string = this.serializeService.serialize(mapReducers.initialQueryState);
  private lastMapState: string = "";
  ngAfterViewInit() {
    this.paramSub = this.route.paramMap.subscribe((params: ParamMap) => {
      //console.log("Param sub");
      var newMapState: IMapState = null;
      var newQueryState: IQueryState = null;
      var mapStateChanged = false;
      var queryStateChanged = false;
      if (params.has("xCenter") && params.has("yCenter")) {
        let xCenter = parseFloat(params.get("xCenter"));
        let yCenter = parseFloat(params.get("yCenter"));
        let zoom = parseFloat(params.get("zoom"));
        let rotation = parseFloat(params.get("rotation"));
        let baseLayer = params.get("baseLayer")?params.get("baseLayer"):"";
        newMapState = { xCenter: xCenter, yCenter: yCenter, zoom: zoom, rotation: rotation, baseLayerCode: baseLayer }
        mapStateChanged = this.lastMapState != JSON.stringify(newMapState) && this.stateSetCount == 0;
        this.lastMapState = JSON.stringify(newMapState);
      }
      if (params.has("queryState")) {
        let queryState = params.get("queryState");
        newQueryState = tassign(mapReducers.initialQueryState);
        if (queryState != "") {
          newQueryState = this.serializeService.deserialize(queryState);
        }
        queryStateChanged = this.lastQueryState != queryState;
        this.lastQueryState = queryState;
      }

      if (mapStateChanged && queryStateChanged) {
        //console.log("Both states");
        this.store.dispatch(new mapActions.SetState(newMapState, newQueryState));
      } else if (mapStateChanged) {
        //console.log("Map state");
        this.store.dispatch(new mapActions.SetMapState(newMapState));
      } else if (queryStateChanged) {
        //console.log("Query state");
        this.store.dispatch(new mapActions.SetQueryState(newQueryState));
      }
      this.stateSetCount += 1;
    });
    setTimeout(() => {
      this.map.instance.updateSize();
    }, 500);
  }

  handleSearchCollapse(event) {
    this.store.dispatch(new mapActions.CollapseSearch());
  }

  handleSearchExpand(event) {
    this.store.dispatch(new mapActions.ExpandSearch());
  }

  handleToggleMenu(event) {
    this.store.dispatch(new mapActions.ToggleMenu());
  }

  handleToggleBaseLayers(event:MouseEvent) {
    this.baseLayersCollapsed = !this.baseLayersCollapsed;
    event.preventDefault();
  }

  handleToggleOverlayLayers(event: MouseEvent) {
    this.overlayLayersCollapsed = !this.overlayLayersCollapsed;
    event.preventDefault();
  }

  handlePredefinedQuery(event: MouseEvent, query: any) {
    event.preventDefault();
    var queryState = tassign(mapReducers.initialQueryState, query);
    this.store.dispatch(new mapActions.DoQuery(queryState));
  }

  handleTrijntjeClick(event: MouseEvent, query: any) {
    event.preventDefault();
    var queryState = tassign(mapReducers.initialQueryState, query);
    var mapState = JSON.parse(this.lastMapState);
    this.router.navigate(["app","trijntje" , mapState.xCenter.toFixed(5), mapState.yCenter.toFixed(5), mapState.zoom, mapState.rotation.toFixed(2), mapState.baseLayerCode, this.serializeService.serialize(queryState)], { replaceUrl: false });
  }

  replaceUrl(mapState: IMapState, queryState: IQueryState, replace: boolean = true) {
      console.debug(`Replace url : Baselayer(${mapState.baseLayerCode}) Querystate(${this.serializeService.serialize(queryState)})`);
      let parts =["."];
      parts.push(mapState.xCenter.toFixed(5));
      parts.push(mapState.yCenter.toFixed(5));
      parts.push( mapState.zoom.toFixed(0));
      parts.push( mapState.rotation.toFixed(2));
      if(mapState.baseLayerCode!="") {
        parts.push(mapState.baseLayerCode);
        parts.push( this.serializeService.serialize(queryState));
        this.router.navigate(parts, { replaceUrl: replace,relativeTo:this.route.parent });
        this._ref.markForCheck();
      }      
  }

  handleOnMoveEnd(event) {
    var map = event.map;
    var view = map.getView();
    var rotation = view.getRotation();
    var zoom = view.getZoom();
    var center = transform(view.getCenter(), view.getProjection(), "EPSG:4326");
    var extent = view.calculateExtent(this.map.instance.getSize());
    let mapState: IMapState = { xCenter: center[0], yCenter: center[1], zoom: zoom, rotation: rotation, baseLayerCode: null };
    let state = { mapState: mapState, extent: extent };
    let source = from([state]);
    source.pipe(withLatestFrom(this.selectedBaseLayer), withLatestFrom(this.queryState)).subscribe(([[state, baselayer], queryState]) => {
      if (mapState && baselayer && queryState) {
        let newMapState = tassign(state.mapState, { baseLayerCode: baselayer.item.code });
        this.replaceUrl(newMapState, tassign(queryState, { bbox: queryState.bboxFilter ? state.extent : queryState.bbox }));
        this.store.dispatch(new mapActions.SetViewExtent(state.extent));
      }
    });
  }

  handleOnMouseDown(event: MouseEvent) {
    this.store.dispatch(new mapActions.CollapseSearch());
  }

  handleOnDownload(event) {

  }

  handleClearSearch(event) {
    this.store.dispatch(new commonActions.Escape(true, false));
  }  

  handleOnDelete(itemLayer: IItemLayer) {
    this.store.dispatch(new mapActions.RemoveLayer(itemLayer));
  }

  handleOnToggleVisibility(itemLayer: IItemLayer) {
    this.store.dispatch(new mapActions.SetVisibility(itemLayer,!itemLayer.visible));
  }

  handleOnSetOpacity(event:{ layer: IItemLayer,opacity:number }) {
    this.store.dispatch(new mapActions.SetOpacity(event.layer, event.opacity));
  }

  handleZoomToExtent(itemLayer: IItemLayer) {
    var extent =  createEmpty();
    extend(extent, itemLayer.layer.getExtent());
    if (extent) {
      this.store.dispatch(new mapActions.SetExtent(extent));
    }    
  }

  handleSelectBaseLayer(itemLayer: IItemLayer) {
    this.store.dispatch(new mapActions.SelectBaseLayer(itemLayer));
  }

  handleSelectOverlayLayer(itemLayer: IItemLayer) {
    this.store.dispatch(new mapActions.SelectOverlayLayer(itemLayer));
  }

  ngOnDestroy() {
    this.paramSub.unsubscribe();
    if (this.itemTypeSub) this.itemTypeSub.unsubscribe();
    if (this.mapStateSub) this.mapStateSub.unsubscribe();
    if (this.queryStateSub) this.queryStateSub.unsubscribe();  }
}