import fs from 'fs';
import path from 'path';
import { AppState } from './types';

const DB_FILE = path.join(process.cwd(), 'data', 'db.json');

const defaultState: AppState = {
  fixedDebts: [],
  variableDebts: [],
  creditCards: [],
  cardPayments: [],
  incomes: [],
  monthlyBudgets: [],
  serviceBills: [],
  alerts: [],
  currentMonth: new Date().getMonth(),
  currentYear: new Date().getFullYear(),
};

export function getDatabase(): AppState {
  if (!fs.existsSync(DB_FILE)) {
    saveDatabase(defaultState);
    return defaultState;
  }
  try {
    return JSON.parse(fs.readFileSync(DB_FILE, 'utf8'));
  } catch (error) {
    console.error('Database read error:', error);
    return defaultState;
  }
}

export function saveDatabase(data: AppState) {
  try {
    fs.writeFileSync(DB_FILE, JSON.stringify(data, null, 2));
  } catch (error) {
    console.error('Database write error:', error);
  }
}