import path from "node:path";
import { fileURLToPath } from "node:url";
import { access, readFile } from "fs/promises";
import { existsSync } from "fs";
export function getCurrentDirname(): string {
  return path.dirname(fileURLToPath(import.meta.url));
}

export class AppError extends Error {
  constructor(
    message: string,
    public cause?: unknown,
  ) {
    super(message);
    this.name = "AppError";
  }
}

export function setupExitHandlers(): void {
  // Handle Ctrl+C gracefully
  process.on("SIGINT", () => {
    console.log("\n\n👋 Goodbye!");
    process.exit(0);
  });

  // Handle other termination signals
  process.on("SIGTERM", () => {
    console.log("\n\n👋 Goodbye!");
    process.exit(0);
  });
}

export function handleUserCancel(error: unknown): never {
  if (error && typeof error === "object" && "name" in error) {
    if (error.name === "ExitPromptError" || error.name === "AbortPromptError") {
      console.log("\n\n👋 Operation cancelled. Goodbye!");
      process.exit(0);
    }
  }
  throw error;
}

interface PackageJson {
  version: string;
  name?: string;
}

export async function getPackageVersion(): Promise<string | null> {
  try {
    const currentDir = getCurrentDirname();
    const packageJsonPath = path.resolve(currentDir, "..", "package.json");

    const packageJsonContent = await readFile(packageJsonPath, "utf-8");
    const packageJson: PackageJson = JSON.parse(packageJsonContent);

    return packageJson.version || null;
  } catch {
    return null;
  }
}