import { SocketServer } from "./SocketServer";
import { ensureUserPath } from "../Utils";
import { HTTPServer } from "./HTTPServer";
import { FuseBox } from "../core/FuseBox";
import { utils } from "realm-utils";
import * as process from "process";

export type HotReloadEmitter = (server: Server, sourceChangedInfo: any) => any;

export type SourceChangedEvent = {
    type: "js" | "css" | "css-file",
    content: string,
    path: string
};

export interface ServerOptions {
    /** Defaults to 4444 if not specified */
    port?: number;

    /**
     * - If false nothing is served.
     * - If string specified this is the folder served from express.static
     *      It can be an absolute path or relative to `appRootPath`
     **/
    root?: boolean | string;

    emitter?: HotReloadEmitter;
    httpServer?: boolean;
    socketURI?: string;
    hmr?: boolean;
    open?: boolean;
}

/**
 * Wrapper around the static + socket servers
 */
export class Server {
    public httpServer: HTTPServer;
    public socketServer: SocketServer;
    constructor(private fuse: FuseBox) {

    }

    /**
     * Starts the server
     * @param str the default bundle arithmetic string
     */
    public start(opts?: ServerOptions): Server {
        opts = opts || {};

        let rootDir = this.fuse.context.output.dir;

        const root: string | boolean = opts.root !== undefined
            ? (utils.isString(opts.root) ? ensureUserPath(opts.root as string) : false) : rootDir;
        const port = opts.port || 4444;
        if (opts.hmr !== false && this.fuse.context.useCache === true) {

            setTimeout(() => {
                this.fuse.context.log.echo(`HMR is enabled`);
            }, 1000);

        } else {
            setTimeout(() => { this.fuse.context.log.echo(`HMR is disabled. Caching should be enabled and {hmr} option should be NOT false`); }
                , 1000);

        }

        this.httpServer = new HTTPServer(this.fuse);

        process.nextTick(() => {
            if (opts.httpServer === false) {
                SocketServer.startSocketServer(port, this.fuse);
            } else {
                this.httpServer.launch({ root, port });
            }
        });
        return this;
    }
}