/*
 * Copyright 2018-present Open Networking Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import {Component, Input, OnInit} from '@angular/core';
import {MapObject} from '../maputils';
import {LocMeta, MetaUi} from '../forcesvg/models';

/**
 * model of the topo2CurrentLayout attrs from BgZoom below
 */
export interface BgZoomAttrs {
    offsetX: number;
    offsetY: number;
    scale: number;
}

/**
 * model of the topo2CurrentLayout background zoom attrs from Layout below
 */
export interface BgZoom {
    cfg: BgZoomAttrs;
    usr?: BgZoomAttrs;
}

/**
 * model of the topo2CurrentLayout breadcrumb from Layout below
 */
export interface LayoutCrumb {
    id: string;
    name: string;
}

/**
 * Enum of the topo2CurrentRegion location type from Location below
 */
export enum LocationType {
    NONE = 'none',
    GEO = 'geo',
    GRID = 'grid'
}

/**
 * model of the topo2CurrentLayout WebSocket response
 */
export interface Layout {
    id: string;
    bgDefaultScale: number;
    bgDesc: string;
    bgFilePath: string;
    bgId: string;
    bgType: LocationType;
    bgWarn: string;
    bgZoom: BgZoom;
    crumbs: LayoutCrumb[];
    parent: string;
    region: string;
    regionName: string;
}

const LONGITUDE_EXTENT = 180;
const LATITUDE_EXTENT = 75;

/**
 * ONOS GUI -- Topology Background Layer View.
 */
@Component({
    selector: '[onos-backgroundsvg]',
    templateUrl: './backgroundsvg.component.html',
    styleUrls: ['./backgroundsvg.component.css']
})
export class BackgroundSvgComponent implements OnInit {
    @Input() map: MapObject;

    layoutData: Layout = <Layout>{};

    static convertGeoToCanvas(location: LocMeta): MetaUi {
        const calcX = (LONGITUDE_EXTENT + location.lng) / ( LONGITUDE_EXTENT * 2 ) * 2000 - 500;
        const calcY = (LATITUDE_EXTENT - location.lat) / ( LATITUDE_EXTENT * 2 ) * 1000;
        return <MetaUi>{
            x: calcX,
            y: calcY,
            equivLoc: {
                lat: location.lat,
                lng: location.lng
            }
        };
    }

    static convertXYtoGeo(x: number, y: number): MetaUi {
        const calcLong: number = (x + 500) * 2 * LONGITUDE_EXTENT / 2000 - LONGITUDE_EXTENT;
        const calcLat: number = -(y * 2 * LATITUDE_EXTENT / 1000 - LATITUDE_EXTENT);
        return <MetaUi>{
            x: x,
            y: y,
            equivLoc: <LocMeta>{
                lat: calcLat,
                lng: calcLong
            }
        };
    }

    constructor() { }

    ngOnInit() {
    }


}