import * as http from "http";
import * as express from "express";
import { FuseBox } from "../";
import { SocketServer } from "./SocketServer";
import { ensureUserPath } from "../Utils";
import { ServerOptions } from "./Server";

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

    /**
     * If specfied this is the folder served from express.static
     * It can be an absolute path or relative to `appRootPath`
     **/
    root?: string | boolean;
}

export class HTTPServer {

    public static start(opts: any, fuse: FuseBox): HTTPServer {
        let server: HTTPServer = new HTTPServer(fuse);
        server.launch(opts);
        return server;
    }

    public app: any;
    public opts: HTTPServerOptions;

    constructor(private fuse: FuseBox) {
        this.app = express();
    }

    // @TODO: should add .stop()
    public launch(opts: HTTPServerOptions, userSettings?: ServerOptions): void {
        this.opts = opts || {};
        const port = this.opts.port || 4444;
        let server = http.createServer();
        SocketServer.createInstance(server, this.fuse);
        this.setup();


        if (userSettings && userSettings.proxy) {
            let proxyInstance;
            try {
                proxyInstance = require('http-proxy-middleware');
            } catch (e) {

            }
            if (proxyInstance) {
                for (let uPath in userSettings.proxy) {
                    this.app.use(uPath, proxyInstance(userSettings.proxy[uPath]));
                }
            } else {
                this.fuse.context.log.echoWarning("You are using development proxy but 'http-proxy-middleware' was not installed");
            }

        }

        server.on("request", this.app);
        setTimeout(() => {
            server.listen(port, () => {
                const msg = `
---------------------------------------------------
Development server running http://localhost:${port}
---------------------------------------------------
`
                console.log(msg);
                //this.spinner = new Spinner(msg);
                //this.spinner.start()
            });
        }, 10);
    }

    public serveStatic(userPath, userFolder) {
        this.app.use(userPath, express.static(ensureUserPath(userFolder)));
    }

    private setup(): void {
        if (this.opts.root) {
            this.app.use("/", express.static(this.opts.root));
            if (!this.fuse.context.inlineSourceMaps && process.env.NODE_ENV !== "production") {
                this.fuse.context.log.echoInfo(`You have chosen not to inline source maps`);
                this.fuse.context.log.echoInfo("You source code is exposed at src/");
                this.fuse.context.log.echoWarning("Make sure you are not using dev server for production!")
                this.app.use(this.fuse.context.sourceMapsRoot, express.static(this.fuse.context.homeDir));
            }
        }
    }
}