/**
 * @typedef {Object.<string, L.Marker>} MarkerLookup
 * A lookup table of markers keyed by 'lat lng' (no groupings)
 */

/**
 * @typedef {Object.<string, L.LayerGroup>} LayerGroupLookup
 * A lookup table of Leaflet layer groups by category
 */

/**
 * @typedef {Object} MapState
 * @property {L.Layer} baseLayer
 * @property {number} zoom
 * @property {L.LatLngExpression} center
 * @property {number} minZoom
 * @property {number} maxZoom
 * A representation of the (current) Leaflet map state
 */

/**
 * @typedef {Object} GisStateType
 * @property {L.Map|null} map
 * @property {{string: L.Layer}|null} baseLayers
 * @property {?MapState} currentMapState
 * @property {boolean} bViewActive
 * @property {MarkerLookup} markers
 * @property {LayerGroupLookup} layers
 * @property {Object|null} bibliography
 * @property {String|null} apiUrl
 * @property {Object} cartography
 */

/** @type {GisStateType} */
export const GisState = {
    map: null,
    baseLayers: null,
    currentMapState: null,
    bViewActive: false,
    markers:  {
        sites: {},
        notConserved: {},
        findings: {},
        prehistoric: {},
        underwater: {},
        reuse: {},
        buildingTechs: {},
    },
    layers: {
        geometries: {},
        /**
         * @type {L.FeatureGroup}
         */
        walls: {},
        sites: {},
        notConserved: {},
        findings: {},
        prehistoric: {},
        underwater: {},
        reuse: {},
        buildingTechs: {},
    },
    bibliography: null,
    apiUrl : null,
    cartography : {
        historic: [],
        cadastral: null,
        buildings: null,
    }
}

/**
 * @param {array} coords - ['lat', 'lng']
 * @param {string} group
 * @returns {L.Marker|undefined}
 */
export function getMarkerByCoords(coords, group) {
	return GisState.markers[group][`${coords[0]} ${coords[1]}`];
}