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

export const DEFAULT_STATE_PATH = join(homedir(), '.config', 'sin', 'sin-github-issues', 'onboarding-state.json');

export type OnboardingState = {
  ownerEmail?: string;
  notes?: string;
  defaultRepo?: string;
  browserProfileEmail?: string;
  browserProfileDirectory?: string;
  updatedAt?: string;
};

export async function readState(): Promise<OnboardingState | null> {
  try {
    return JSON.parse(await readFile(DEFAULT_STATE_PATH, 'utf8')) as OnboardingState;
  } catch {
    return null;
  }
}

export async function writeState(state: OnboardingState) {
  await mkdir(dirname(DEFAULT_STATE_PATH), { recursive: true });
  await writeFile(DEFAULT_STATE_PATH, `${JSON.stringify(state, null, 2)}\n`, 'utf8');
  return state;
}

export function clean(value: string | undefined) {
  const normalized = String(value || '').trim();
  return normalized || undefined;
}