// Type definitions for proj4 2.3.15
// Project: https://github.com/proj4js/proj4js
// Definitions by: Denis Carriere <https://github.com/DenisCarriere>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

declare module "proj4" {
    const TemplateCoordinates: Array<number> | InterfaceCoordinates;

    interface InterfaceCoordinates {
        x: number,
        y: number,
        z?: number,
        m?: number
    }

    interface InterfaceDatum {
        datum_type: number
        a: number
        b: number
        es: number
        ep2: number
    }

    interface Proj4Static {
        forward(coordinates: typeof TemplateCoordinates): Array<number>
        inverse(coordinates: typeof TemplateCoordinates): Array<number>
    }

    interface InterfaceProjection {
        datum: string
        b: number
        rf: number
        sphere: number
        es: number
        e: number
        ep2: number
        forward(coordinates: typeof TemplateCoordinates): Array<number>
        inverse(coordinates: typeof TemplateCoordinates): Array<number>
    }

    namespace proj4 {
        /**
         * @name defaultDatum
         */
        export const defaultDatum: string;

        /**
         * @name Proj
         */
        export function Proj(srsCode:any, callback?: any): InterfaceProjection;
        
        /**
         * @name WGS84
         */
        export const WGS84: any;

        /**
         * Depecrated v3
         * @name Point
         */
        export function Point(x: number, y: number, z?: number): InterfaceCoordinates;
        export function Point(coordinates: Array<number>): InterfaceCoordinates;
        export function Point(coordinates: InterfaceCoordinates): InterfaceCoordinates;
        export function Point(coordinates: string): InterfaceCoordinates;
        
        /**
         * @name toPoint
         */
        export function toPoint(array: Array<number>): InterfaceCoordinates;
        
        /**
         * @name defs
         */
        export function defs(name: string): any;
        export function defs(name: string, projection: string): any;
        export function defs(name: Array<Array<string>>): any;

        /**
         * @name transform
         */
        export function transform(source: InterfaceProjection, dest: InterfaceProjection, point: typeof TemplateCoordinates): any;

        /**
         * @name mgrs
         */
        export function mgrs(coordinates: Array<number>, accuracy: number): string;

        /**
         * @name version
         */
        export const version: string;
    }

    /**
     * @name proj4
     */
    function proj4(fromProjection: string): Proj4Static;
    function proj4(fromProjection: string, toProjection: string): Proj4Static;
    function proj4(fromProjection: string, coordinates: typeof TemplateCoordinates): Array<number>;
    function proj4(fromProjection: string, toProjection: string, coordinates: typeof TemplateCoordinates): Array<number>;
    export = proj4
}