import { buildCommand, numberParser } from "npm:@stricli/core";
import express from 'npm:express';

type Flags = {
  readonly port: number;
  readonly hostname: string;
  readonly open: boolean;
};

export const command = buildCommand({
  func: (flags: Flags, _text: string) => {
    const port = flags.port;
    const hostname = flags.hostname;
    const open = flags.open;

    const app = express();

    app.use(express.static(import.meta.dirname + '/../editor/dist'));

    app.listen(port, hostname, () => {
      let url: string = `http://${hostname}:${port}`;
      console.debug(`Express server running at ${url}`);

      if (open) {
        let o = (new Deno.Command("open", { args: [ url ]})).outputSync();
        if (!o.success) {
          console.error("Failed to open the server URL");
        }
      }
    });
  },
  parameters: {
    flags: {
      port: {
        brief: "Port to run the editor server on",
        kind: "parsed",
        parse: numberParser,
        default: "8066"
      },
      hostname: {
        brief: "Host to run the editor server on",
        kind: "parsed",
        parse: String,
        default: "localhost"
      },
      open: {
        brief: "Whether to open the server's URL",
        kind: "boolean",
        default: false
      }
    }
  },
  docs: {
    brief: "Run an interactive editor server",
  },
});