import https from 'node:https';
import fs from 'fs';
import { Application } from '@midwayjs/koa';
import { createSelfCertificate } from './self-certificate.js';
import { logger } from '@certd/basic';

export type HttpsServerOptions = {
  enabled: boolean;
  app?: Application;
  port: number;
  key: string;
  cert: string;
};

export class HttpsServer {
  server: https.Server;
  opts: HttpsServerOptions;
  constructor() {}

  async restart() {
    await this.close();
    return this.start(this.opts);
  }

  async close() {
    return new Promise((resolve, reject) => {
      this.server.close(() => {
        resolve(true);
      });
    });
  }

  start(opts: HttpsServerOptions) {
    if (!opts) {
      logger.error('https配置不能为空');
      return;
    }
    this.opts = opts;
    logger.info('=========================================');
    if (!opts.key || !opts.cert) {
      logger.error('证书路径未配置，无法启动https服务，请先配置：koa.https.key和koa.https.cert');
      return;
    }

    if (!fs.existsSync(opts.key) || !fs.existsSync(opts.cert)) {
      logger.info('证书文件不存在,将生成自签名证书');
      createSelfCertificate({
        crtPath: opts.cert,
        keyPath: opts.key,
      });
    }
    logger.info('准备启动https服务');
    const httpServer = https.createServer(
      {
        cert: fs.readFileSync(opts.cert),
        key: fs.readFileSync(opts.key),
      },
      opts.app.callback()
    );
    this.server = httpServer;
    const hostname = '0.0.0.0';
    // A function that runs in the context of the http server
    // and reports what type of server listens on which port
    function listeningReporter() {
      // `this` refers to the http server here
      logger.info(`Https server is listening on https://${hostname}:${opts.port}`);
    }

    try {
      httpServer.listen(opts.port, hostname, listeningReporter);
      return httpServer;
    } catch (e) {
      logger.error('启动https服务失败', e);
    }
  }
}

export const httpsServer = new HttpsServer();