#!/usr/bin/env node
import { spawn } from "node:child_process";
import { existsSync as exists_sync, statSync as stat_sync } from "node:fs";
import path from "node:path";
import { fileURLToPath as file_url_to_path } from "node:url";
import electron from "electron";

const args = process.argv.slice(2);
const root = file_url_to_path(new URL("../", import.meta.url));

if (args.length === 1 && ["--help", "-h"].includes(args[0])) {
  console.log("Usage: paper <file>");
} else {
  try {
    if (args.length !== 1) {
      throw new Error("Usage: paper <file>");
    }

    const target = path.resolve(args[0]);
    if (![".md", ".markdown", ".mdown", ".txt"].includes(path.extname(target).toLowerCase())) {
      throw new Error("Supported files: .md, .markdown, .mdown, .txt");
    }
    if (!stat_sync(target).isFile()) {
      throw new Error("The path must point to a file.");
    }
    if (!exists_sync(path.join(root, "dist/electron/main.js"))) {
      throw new Error("Build Paper first with npm run build.");
    }

    const child = spawn(electron, [root, "--paper-file", target], {
      detached: true,
      stdio: "ignore",
      env: { ...process.env, ELECTRON_RUN_AS_NODE: undefined },
    });
    child.on("error", (error) => {
      console.error(`Paper: ${error.message}`);
      process.exitCode = 1;
    });
    child.unref();
  } catch (error) {
    console.error(`Paper: ${error.message}`);
    process.exitCode = 1;
  }
}