import express from "express";
import yargs from "yargs";
import { Handler } from "./handler.js";
import { Config } from "./config.js";

class Server {
  constructor({ handler }) {
    this.handler = handler;

    this.app = express();

    this.app.get("/{*any}", async (req, res) => {
      const host = req.hostname;
      const path = req.path;
      const { status, content, contentType } = await this.handler.handleRequest(
        {
          host,
          path,
        }
      );
      res.status(status).set("Content-Type", contentType).send(content);
    });
  }

  async start({ port }) {
    this.app.listen(port, () => {
      console.log(`Server is running on port ${port}`);
    });
    this.app.on("error", (error) => {
      console.error("Server error:", error);
    });
  }
}

async function main() {
  const args = yargs(process.argv.slice(2)).parse();
  const port = args.port ?? args.p ?? 3000;
  const configFilepath = args.config || "config.json";
  const config = await Config.fromFile(configFilepath);
  const handler = await Handler.fromConfig(config);
  const server = new Server({
    handler,
  });
  await server.start({ port });
}

main();