// Entry point (also used by the compiled binary):
//   job-board [serve] [--host <addr>] [--port <n>]   start the web server (scrapes every 24h)
//   job-board scrape                                 run all scrapers once and exit (exit code 1 if any failed)

export {};

const USAGE = "Usage: job-board [serve] [--host <addr>] [--port <n>] | job-board scrape\n  --host  address to listen on (default 127.0.0.1; 0.0.0.0 = all interfaces)\n  --port  port to listen on (default 3000)";

function fail(message: string): never {
  console.error(`${message}\n${USAGE}`);
  process.exit(2);
}

const args = process.argv.slice(2);
let command: string | undefined;
for (let i = 0; i < args.length; i++) {
  const arg = args[i]!;
  if (arg === "--port" || arg === "-p" || arg.startsWith("--port=")) {
    const value = arg.startsWith("--port=") ? arg.slice("--port=".length) : args[++i];
    const port = Number(value);
    if (!Number.isInteger(port) || port < 1 || port > 65535) fail(`Invalid port "${value ?? ""}".`);
    process.env.PORT = String(port); // read by server.ts; overrides the PORT env var
  } else if (arg === "--host" || arg.startsWith("--host=")) {
    const value = arg.startsWith("--host=") ? arg.slice("--host=".length) : args[++i];
    if (!value || value.startsWith("-")) fail(`Invalid host "${value ?? ""}".`);
    process.env.JOB_BOARD_HOST = value; // read by server.ts; overrides the env var
  } else if (arg === "--help" || arg === "-h") {
    console.log(USAGE);
    process.exit(0);
  } else if (!command && !arg.startsWith("-")) {
    command = arg;
  } else {
    fail(`Unknown argument "${arg}".`);
  }
}

if (command === "scrape") {
  const { runAllScrapers } = await import("./scrape");
  const results = await runAllScrapers();
  process.exit(results.some((r) => r.error) ? 1 : 0);
} else if (command === undefined || command === "serve") {
  await import("./server");
} else {
  fail(`Unknown command "${command}".`);
}