import '@tsed/platform-express'; // !! DO NOT MODIFY !!
import '@tsed/swagger';
import '@tsed/typeorm'; // !! DO NOT MODIFY !! -- https://github.com/tsedio/tsed/issues/1332#issuecomment-837840612

import { createTerminus } from '@godaddy/terminus';
import { HttpServer, PlatformApplication } from '@tsed/common';
import { Configuration, Inject, InjectorService } from '@tsed/di';
import bodyParser from 'body-parser';
import compress from 'compression';
import cookieParser from 'cookie-parser';
import type { Express } from 'express';
import expressBunyanLogger from 'express-bunyan-logger';
import helmet from 'helmet';
import methodOverride from 'method-override';
import type { ConnectionOptions } from 'typeorm';
import { getConnectionManager } from 'typeorm';

import swaggerSettingsForDev from '~/config/swagger/config.dev';
import swaggerSettingsForProd from '~/config/swagger/config.prod';
import loggerFactory from '~/utils/logger';

import { GlobalHttpErrorHandlingMiddleware } from './middlewares/GlobalHttpErrorHandlingMiddleware';

import './filters/CustomHttpErrorFilter';
import './filters/ResourceNotFoundFilter';

export const rootDir = __dirname;
const isProduction = process.env.NODE_ENV === 'production';

const logger = loggerFactory('slackbot-proxy:server');

const connectionOptions: ConnectionOptions = {
  // The 'name' property must be set. Otherwise, the 'name' will be '0' and won't work well. -- 2021.04.05 Yuki Takei
  // see: https://github.com/TypedProject/tsed/blob/7630cda20a1f6fa3a692ecc3e6cd51d37bc3c45f/packages/typeorm/src/utils/createConnection.ts#L10
  name: 'default',
  type: process.env.TYPEORM_CONNECTION,
  host: process.env.TYPEORM_HOST,
  port: process.env.TYPEORM_PORT,
  database: process.env.TYPEORM_DATABASE,
  username: process.env.TYPEORM_USERNAME,
  password: process.env.TYPEORM_PASSWORD,
  synchronize: true,
} as ConnectionOptions;

const swaggerSettings = isProduction
  ? swaggerSettingsForProd
  : swaggerSettingsForDev;
const helmetOptions = isProduction
  ? {
      contentSecurityPolicy: false,
      expectCt: false,
      referrerPolicy: false,
      permittedCrossDomainPolicies: false,
    }
  : {
      contentSecurityPolicy: {
        directives: {
          defaultSrc: ["'self'"],
          styleSrc: ["'self'", "'unsafe-inline'"],
          imgSrc: ["'self'", 'data:', 'https:'],
          scriptSrc: ["'self'", "https: 'unsafe-inline'"],
        },
      },
      expectCt: false,
      referrerPolicy: false,
      permittedCrossDomainPolicies: false,
    };

@Configuration({
  rootDir,
  acceptMimes: ['application/json'],
  httpPort: process.env.PORT || 8080,
  httpsPort: false, // CHANGE
  // disable RequestLogger of @tsed/logger
  logger: { logRequest: false },
  mount: {
    '/': [`${rootDir}/controllers/*.ts`, `${rootDir}/middlewares/*.ts`],
  },
  middlewares: [helmet(helmetOptions)],
  componentsScan: [`${rootDir}/services/*.ts`],
  typeorm: [
    {
      ...connectionOptions,
      entities: [`${rootDir}/entities/*{.ts,.js}`],
      migrations: [`${rootDir}/migrations/*{.ts,.js}`],
      subscribers: [`${rootDir}/subscribers/*{.ts,.js}`],
    } as ConnectionOptions,
  ],
  swagger: swaggerSettings,
  exclude: ['**/*.spec.ts'],
  viewsDir: `${rootDir}/views`,
  views: {
    root: `${rootDir}/views`,
    viewEngine: 'ejs',
    extensions: {
      ejs: 'ejs',
    },
  },
  statics: {
    '/': [
      {
        root: `${rootDir}/public`,
      },
    ],
  },
})
export class Server {
  @Inject()
  app: PlatformApplication<Express>;

  @Configuration()
  settings: Configuration;

  @Inject()
  injector: InjectorService;

  $beforeInit(): void {
    const serverUri = process.env.SERVER_URI;

    if (serverUri === undefined) {
      throw new Error("The environment variable 'SERVER_URI' must be defined.");
    }
  }

  $beforeRoutesInit(): void {
    this.app
      .use(cookieParser())
      .use(compress({}))
      .use(methodOverride())
      .use(bodyParser.json())
      .use(
        bodyParser.urlencoded({
          extended: true,
        }),
      );

    this.setupLogger();
  }

  $afterRoutesInit(): void {
    this.app.use(GlobalHttpErrorHandlingMiddleware);
  }

  $beforeListen(): void {
    const server = this.injector.get<HttpServer>(HttpServer);

    // init terminus
    createTerminus(server, {
      onSignal: async () => {
        logger.info('server is starting cleanup');
        const connectionManager = getConnectionManager();
        const defaultConnection = connectionManager.get('default');
        await defaultConnection.close();
      },
      onShutdown: async () => {
        logger.info('cleanup finished, server is shutting down');
      },
    });
  }

  /**
   * Setup logger for requests
   */
  private setupLogger(): void {
    // use bunyan
    if (isProduction) {
      const logger = loggerFactory('express');

      this.app.use(
        expressBunyanLogger({
          logger,
          excludes: ['*'],
        }),
      );
    }
    // use morgan
    else {
      // eslint-disable-next-line @typescript-eslint/no-var-requires
      const morgan = require('morgan');
      this.app.use(morgan('dev'));
    }
  }
}