import express, { Express, NextFunction, Request, Response } from 'express';
import path from 'path';

import { HttpStatusException } from '../../common/lib/http-status.exception';
import { Logger } from '../../common/util/logger.class';

import { ControllerPool } from './ctrl/controller-pool.interface';
import { ServerAPIHandler } from './webhdl/server-api-handler.class';
import { ServicesAPIHandler } from './webhdl/services-api-handler.class';

export class Webserver {
  private app: Express;

  constructor(private port: number, ctrlPool: ControllerPool) {
    this.app = express();

    const serverApi = new ServerAPIHandler(ctrlPool);
    this.app.use('/server', serverApi.router);
    const servicesApi = new ServicesAPIHandler(ctrlPool);
    this.app.use('/services', servicesApi.router);

    this.app.use('/', express.static(process.env.STATIC_DIR || 'public'));

    this.app.use('**', express.static(path.join(process.env.STATIC_DIR || 'public', 'index.html')));

    this.app.use((err: any, req: Request, res: Response, next: NextFunction) => {
      if (err instanceof HttpStatusException) {
        res.status(err.statusCode).send(err.message);
      } else {
        Logger.error('[ERROR] Webservice ErrorHandler caught:', err);
        res.status(500).send(JSON.stringify(err));
      }
    });

    this.app.listen(this.port, () => {
      Logger.info(`[INFO] Monitoring Webserver started at http://localhost:${this.port}`);
    });
  }
}