#!/usr/bin/env node

const postcss = require(require.resolve("postcss", { paths: [process.cwd()] }));
const config = require(`${process.cwd()}/postcss.config.js`);
const net = require("net");

class PostCSS {
  static process(data, write) {
    postcss(config.plugins)
      .process(JSON.parse(data).raw_content, { from: "stdin" })
      .then((result) => write(result))
      .catch((error) => {
        console.error("PostCSS Error!\n");
        console.error(error.toString());
      });
  }

  static startServer() {
    const server = net.createServer((c) => {
      c.on("data", (data) => {
        this.process(data, function (result) {
          const packet = { compiled_css: result.toString() };

          c.write(`${JSON.stringify(packet)}\n`);
        });
      });
    });

    server.on("error", (err) => {
      console.error("PostCSS Server Error!\n");
      throw err;
    });

    server.listen(8124, () => {
      console.log("PostCSS Server listening on port 8124...");
    });
  }
}

switch (process.argv[2]) {
  case "--development":
    PostCSS.startServer();
    break;
  default:
    PostCSS.process(process.argv[2], function (result) {
      const packet = { compiled_css: result.toString() };

      process.stdout.write(`${JSON.stringify(packet)}`);
    });
}