/**
 * CLI configuration utilities
 * Stores credentials at ~/.config/reviq/credentials.json
 */

import { mkdir, readFile, unlink, writeFile } from "node:fs/promises";
import { homedir } from "node:os";
import { join } from "node:path";

export interface Config {
  apiUrl: string;
  token: string;
  email: string;
}

const CONFIG_DIR = join(homedir(), ".config", "reviq");
const CONFIG_FILE = join(CONFIG_DIR, "credentials.json");

/**
 * Get the path to the config file
 */
export function getConfigPath(): string {
  return CONFIG_FILE;
}

/**
 * Read the config file
 * Returns null if the file doesn't exist or is invalid
 */
export async function readConfig(): Promise<Config | null> {
  try {
    const data = await readFile(CONFIG_FILE, "utf-8");
    return JSON.parse(data) as Config;
  } catch {
    return null;
  }
}

/**
 * Write the config file
 * Creates the config directory if it doesn't exist
 */
export async function writeConfig(config: Config): Promise<void> {
  await mkdir(CONFIG_DIR, { recursive: true, mode: 0o700 });
  await writeFile(CONFIG_FILE, JSON.stringify(config, null, 2), {
    mode: 0o600,
  });
}

/**
 * Delete the config file
 * Ignores errors if the file doesn't exist
 */
export async function deleteConfig(): Promise<void> {
  try {
    await unlink(CONFIG_FILE);
  } catch {
    // Ignore if doesn't exist
  }
}