import { tassign } from 'tassign';
import { IItem,Item } from '@farmmaps/common';
import { IItemLayer,ItemLayer} from '../models/item.layer';
import { IMapState} from '../models/map.state';
import { IQueryState} from '@farmmaps/common';
import { IPeriodState} from '../models/period.state';
import { IStyles} from '../models/style.cache';
import * as mapActions from '../actions/map.actions';
import {commonActions} from '@farmmaps/common';
import { createSelector, createFeatureSelector } from '@ngrx/store';

import {Feature} from 'ol';

import { ROUTER_NAVIGATION, RouterNavigationAction } from '@ngrx/router-store';

import { MODULE_NAME } from '../module-name';

const startDate:Date = new Date(new Date(Date.now()).getFullYear(), new Date(Date.now()).getMonth() - 3, 1);
const endDate:Date = new Date(Date.now());

export const initialQueryState: IQueryState = {
  itemCode: null,
  parentCode: null,
  level: 1,
  itemType: null,
  bboxFilter: false,
  query: null,
  tags: null,
  endDate: null,
  startDate: null,
  bbox: []
};

export interface State {
  period:IPeriodState,
  mapState: IMapState,
  viewExtent: number[],
  queryState: IQueryState,
  query:IQueryState,
  parentCode: string,
  features: Array<Feature>,
  panelVisible: boolean,
  panelCollapsed: boolean,
  selectedFeature: Feature,
  selectedItem:IItem,
  clearEnabled: boolean,
  searchCollapsed: boolean,
  searchMinified: boolean, 
  extent: number[],
  baseLayers: Array<IItemLayer>
  overlayLayers: Array<IItemLayer>,
  selectedItemLayer: IItemLayer,
  projection: string,
  selectedBaseLayer: IItemLayer,
  selectedOverlayLayer: IItemLayer,
  styles:IStyles,
  showLayerSwitcher:boolean
}

export const initialState: State = {
  period: {
    startDate: startDate,
    endDate: endDate
  },
  mapState: {
    zoom: 8,
    rotation: 0,
    xCenter: 5.377554,
    yCenter: 52.162422,
    baseLayerCode: ""
  },
  viewExtent:[],
  queryState: tassign(initialQueryState),
  query: tassign(initialQueryState),
  parentCode: null,
  features: [],
  panelVisible: false,
  panelCollapsed: false,
  selectedFeature: null,
  selectedItem: null, 
  clearEnabled: false,
  searchCollapsed: true,
  searchMinified:false,
  extent: null,
  baseLayers: [],
  overlayLayers: [],
  projection: "EPSG:3857",
  selectedBaseLayer: null,
  selectedOverlayLayer: null,
  selectedItemLayer: null,
  styles: {},
  showLayerSwitcher: false
}

export function reducer(state = initialState, action: mapActions.Actions | commonActions.Actions | RouterNavigationAction): State {    
  switch (action.type) {
    case ROUTER_NAVIGATION: {
      let a = action as RouterNavigationAction;
      return tassign(state);
    }
    case mapActions.SETMAPSTATE: {
      let a = action as mapActions.SetMapState;
      return tassign(state, {
        mapState: a.mapState
      });
    }
    case mapActions.SETQUERYSTATE: {
      let a = action as mapActions.SetQueryState;
      return tassign(state, { queryState: tassign(a.queryState )});
    }
    case mapActions.SETSTATE: {
      let a = action as mapActions.SetState;
      return tassign(state, { mapState: tassign(a.mapState), queryState: tassign(a.queryState)});
    }
    case mapActions.SETVIEWEXTENT: {
      let a = action as mapActions.SetViewExtent;
      return tassign(state, { viewExtent: a.extent });
    }
    case mapActions.SETPARENT: {
      let a = action as mapActions.SetParent;
      return tassign(state, {       
        parentCode : a.parentCode
      });
    }
    case mapActions.STARTSEARCHSUCCESS: {
      let a = action as mapActions.StartSearchSuccess;
      return tassign(state, {
        panelVisible: true,
        clearEnabled: true,
        searchMinified: true,
        features: a.features
      });
    }
    case mapActions.SELECTFEATURE: {
      let a = action as mapActions.SelectFeature;
      return tassign(state, {
        selectedFeature: state.selectedItem?state.selectedFeature: a.feature
      });
    }
    case mapActions.SELECTITEM: {
      return tassign(state, {
        selectedItem: null,
        searchMinified:false,
        selectedItemLayer: null,
        features:[]
      });
    }
    case mapActions.SELECTITEMSUCCESS: {
      let a = action as mapActions.SelectItemSuccess;
      var itemLayer = null;
      if (a.item && "vnd.farmmaps.itemtype.layer,vnd.farmmaps.itemtype.shape.processed,vnd.farmmaps.itemtype.geotiff.processed".indexOf(a.item.itemType) >=0 ) {
        itemLayer = new ItemLayer(a.item);
      }
      return tassign(state, {
        selectedItem: a.item,
        selectedItemLayer: itemLayer,
        panelVisible: a.item != null,
        clearEnabled: a.item != null,
        searchCollapsed: false,
        searchMinified: true,
        queryState: tassign(state.queryState, {itemCode:a.item ? a.item.code:null})
      });
    }
    case mapActions.STARTSEARCH: {
      let a = action as mapActions.StartSearch;
      return tassign(state, {
        selectedItem: null,
        selectedItemLayer:null,
        queryState: tassign(a.queryState),
        searchCollapsed: false,
        searchMinified: true
      });
    }
    case mapActions.DOQUERY: {
      let a = action as mapActions.DoQuery;
      return tassign(state, {
        query: tassign(a.query, { bbox: a.query.bboxFilter ? state.viewExtent : [] })});
    }
    case mapActions.ADDFEATURESUCCESS: {
      let a = action as mapActions.AddFeatureSuccess;
      let features = state.features.slice();
      features.push(a.feature);
      return tassign(state, {
        panelVisible: true,
        selectedFeature: a.feature,
        extent: a.feature.getGeometry().getExtent(),
        searchCollapsed: false,
        clearEnabled:true,
        features:features
      });
    }
    case mapActions.UPDATEFEATURESUCCESS: {
      let a = action as mapActions.UpdateFeatureSuccess;     
      let features: any[] = [];
      var index = -1;
      for (var i = 0; i < state.features.length; i++) {
        if (state.features[i].getId() == a.feature.getId()) {
          features.push(a.feature);
        } else {
          features.push(state.features[i]);
        }
      }
      return tassign(state, { features: features });
    }
    case mapActions.EXPANDSEARCH: {
      return tassign(state, { searchCollapsed: false });
    }
    case mapActions.COLLAPSESEARCH: {
      return tassign(state, { searchCollapsed: state.panelVisible ? false: true});
    }
    case mapActions.SETEXTENT: {
      let a = action as mapActions.SetExtent;    
      return tassign(state, { extent: a.extent });
    }   
    case mapActions.ADDLAYER: {
      let a = action as mapActions.AddLayer;
      let itemLayers = state.overlayLayers.slice(0);
      let itemLayer = new ItemLayer(a.item);
      itemLayer.layerIndex = a.layerIndex == -1 ? 0 : a.layerIndex;
      itemLayers.push(itemLayer);
      return tassign(state, { overlayLayers: itemLayers, selectedOverlayLayer: itemLayer });
    }
    case mapActions.REMOVELAYER: {
      let a = action as mapActions.RemoveLayer;
      let newLayers = state.overlayLayers.slice(0);
      let i = state.overlayLayers.indexOf(a.itemLayer);
      var selectedOverlayLayer: IItemLayer = null;
      if (i>0 && state.overlayLayers.length > 1)
        selectedOverlayLayer = state.overlayLayers[i - 1];
      else if (i == 0 && state.overlayLayers.length > 1)
        selectedOverlayLayer = state.overlayLayers[i + 1];
      newLayers.splice(i, 1);
      return tassign(state, { overlayLayers: newLayers, selectedOverlayLayer: selectedOverlayLayer });
    }
    case mapActions.SETVISIBILITY: {
      let a = action as mapActions.SetVisibility;
      let newLayers = state.overlayLayers.slice(0);
      let i = state.overlayLayers.indexOf(a.itemLayer);
      newLayers[i].visible = a.visibility;
      return tassign(state, { overlayLayers: newLayers });
    }
    case mapActions.SETOPACITY: {
      let a = action as mapActions.SetOpacity;
      let newLayers = state.overlayLayers.slice(0);
      let i = state.overlayLayers.indexOf(a.itemLayer);
      newLayers[i].opacity = a.opacity;
      return tassign(state, { overlayLayers: newLayers });
    }
    case mapActions.SETLAYERINDEX: {
      let a = action as mapActions.SetLayerIndex;
      if (a.itemLayer == null) {
        var newItemlayer = new ItemLayer(state.selectedItemLayer.item);
        newItemlayer.layerIndex = a.layerIndex;
        return tassign(state, { selectedItemLayer: newItemlayer})
      } else {
        let newLayers = state.overlayLayers.slice(0);
        let i = state.overlayLayers.indexOf(a.itemLayer);
        newLayers[i].layerIndex = a.layerIndex;
        return tassign(state, { overlayLayers: newLayers });
      }
    }
    case mapActions.LOADBASELAYERSSUCCESS: {
      let a =action as mapActions.LoadBaseLayersSuccess;
      let baseLayers:ItemLayer[] = [];
      for (let item of a.items) {
        var l = new ItemLayer(item);
        l.visible = false;
        baseLayers.push(l);
      }
      var selectedBaseLayer: IItemLayer = null;
      var mapState = tassign(state.mapState);
      console.debug(`Base layerload: ${mapState.baseLayerCode}`)
      if (baseLayers.length > 0 && mapState.baseLayerCode != "") {
        selectedBaseLayer = baseLayers.filter(layer => layer.item.code === mapState.baseLayerCode)[0];
        selectedBaseLayer.visible = true;
      } else if (baseLayers.length > 0) {
        selectedBaseLayer = baseLayers[0];
        selectedBaseLayer.visible = true;
        mapState.baseLayerCode = selectedBaseLayer.item.code;
      }
      return tassign(state, { mapState:mapState, baseLayers: baseLayers, selectedBaseLayer: selectedBaseLayer });
    }
    case mapActions.SELECTBASELAYER: {
      let a = action as mapActions.SelectBaseLayer;
      let baseLayers = state.baseLayers.slice(0);
      baseLayers.forEach((l) => l.visible = false);
      let i = state.baseLayers.indexOf(a.itemLayer);
      baseLayers[i].visible = true;
      var mapState = tassign(state.mapState);
      mapState.baseLayerCode = a.itemLayer.item.code;
      return tassign(state, {mapState:mapState, baseLayers:baseLayers,selectedBaseLayer:a.itemLayer });
    }
    case mapActions.SELECTOVERLAYLAYER: {
      let a = action as mapActions.SelectOverlayLayer;
      return tassign(state, { selectedOverlayLayer: a.itemLayer });
    }
    case commonActions.ESCAPE: {
      let a = action as commonActions.Escape;
      let newQueryState = tassign(state.queryState, { query: null, tags: null, itemCode: null, parentCode: null, itemType: null });
      if (a.escapeKey) {
        return tassign(state, {
          panelVisible: false,
          panelCollapsed:false,
          selectedItem: null,
          selectedItemLayer: null,
          selectedFeature: null,
          queryState: newQueryState,
          clearEnabled: false,
          searchCollapsed: true,
          searchMinified: false,
          features: [],
          query:initialState.query,
          showLayerSwitcher: false
        });
      } else {
        return tassign(state, {});
      }
    }
    case mapActions.SETSTYLE:{
      let a = action as mapActions.SetStyle;
      let styles = tassign(state.styles);
      styles[a.itemType] = a.style;
      return tassign(state,{styles:styles});
    }
    case mapActions.SHOWLAYERSWITCHER:{
      let a = action as mapActions.ShowLayerSwitcher;
      return tassign(state,{showLayerSwitcher:a.show});
    }
    default: {
      return state;
    }
  }
}

export const getMapState = (state: State) => state.mapState;
export const getParentCode = (state: State) => state.parentCode;
export const getFeatures = (state: State) => state.features;
export const getPanelVisible = (state: State) => state.panelVisible;
export const getPanelCollapsed = (state: State) => state.panelCollapsed;
export const getSelectedFeature = (state: State) => state.selectedFeature;
export const getSelectedItem = (state: State) => state.selectedItem;
export const getQueryState = (state: State) => state.queryState;
export const getClearEnabled = (state: State) => state.clearEnabled;
export const getSearchCollapsed = (state: State) => state.searchCollapsed;
export const getSearchMinified = (state: State) => state.searchMinified;
export const getExtent = (state: State) => state.extent;
export const getOverlayLayers = (state: State) => state.overlayLayers;
export const getBaseLayers = (state: State) => state.baseLayers;
export const getProjection = (state: State) => state.projection;
export const getSelectedBaseLayer = (state: State) => state.selectedBaseLayer;
export const getSelectedOverlayLayer = (state: State) => state.selectedOverlayLayer;
export const getQuery = (state: State) => state.query;
export const getSelectedItemLayer = (state: State) => state.selectedItemLayer;
export const getPeriod = (state:State) => state.period;
export const getStyles = (state:State) => state.styles;
export const getShowLayerSwitcher = (state:State) => state.showLayerSwitcher;

export const selectMapState = createFeatureSelector<State>(MODULE_NAME);
export const selectGetMapState= createSelector(selectMapState, getMapState);
export const selectGetParentCode = createSelector(selectMapState, getParentCode);
export const selectGetFeatures = createSelector(selectMapState, getFeatures);
export const selectGetPanelVisible = createSelector(selectMapState, getPanelVisible);
export const selectGetPanelCollapsed = createSelector(selectMapState, getPanelCollapsed);
export const selectGetSelectedFeature = createSelector(selectMapState, getSelectedFeature);
export const selectGetSelectedItem = createSelector(selectMapState, getSelectedItem);
export const selectGetQueryState = createSelector(selectMapState, getQueryState);
export const selectGetClearEnabled = createSelector(selectMapState, getClearEnabled);
export const selectGetSearchCollapsed = createSelector(selectMapState, getSearchCollapsed);
export const selectGetSearchMinified = createSelector(selectMapState, getSearchMinified);
export const selectGetExtent = createSelector(selectMapState, getExtent);
export const selectGetOverlayLayers = createSelector(selectMapState, getOverlayLayers);
export const selectGetBaseLayers = createSelector(selectMapState, getBaseLayers);
export const selectGetProjection = createSelector(selectMapState, getProjection);
export const selectGetSelectedBaseLayer = createSelector(selectMapState, getSelectedBaseLayer);
export const selectGetSelectedOverlayLayer = createSelector(selectMapState, getSelectedOverlayLayer);
export const selectGetQuery = createSelector(selectMapState, getQuery); 
export const selectGetSelectedItemLayer = createSelector(selectMapState, getSelectedItemLayer);
export const selectGetPeriod = createSelector(selectMapState, getPeriod);
export const selectGetStyles = createSelector(selectMapState, getStyles);
export const selectGetShowLayerSwitcher = createSelector(selectMapState,getShowLayerSwitcher);