const { ChartOfAccountsRepository } = require('../repositories');
const logger = require('../../../src/utils/logger');

// Define the 7 default accounts to seed for every new HOA site
const DEFAULT_ACCOUNTS = [
  { code: '1000', name: 'Checking Account', type: 'asset', description: 'Holds all cash; receives monthly fees, pays all bills.' },
  { code: '1100', name: 'Accounts Receivable – Owners', type: 'asset', description: 'Tracks unpaid monthly service fees (who owes what).' },
  { code: '2000', name: 'Accounts Payable – Vendors', type: 'liability', description: 'Tracks unpaid bills (what the HOA owes).' },
  { code: '2100', name: 'Prepaid Assessments', type: 'liability', description: 'Records fees paid in advance (liability until earned).' },
  { code: '3100', name: 'HOA Fund Balance', type: 'equity', description: 'Starting/ending equity; required for balance sheet.' },
  { code: '4100', name: 'Monthly Service Fees', type: 'income', description: 'All regular income comes here.' },
  { code: '5100', name: 'Operating Expenses', type: 'expense', description: 'All spending (utilities, repairs, insurance, etc.).' }
];

/**
 * Seed default financial accounts for a given site
 * This function is idempotent per account code per site: it skips any that already exist.
 * @param {string} siteId
 * @param {string|null} createdByUserId
 */
async function seedDefaultAccounts(siteId, createdByUserId = null) {
  const chartOfAccountsRepository = new ChartOfAccountsRepository();

  const createdAccountIds = [];
  try {
    for (const acc of DEFAULT_ACCOUNTS) {
      // Skip if exists
      const exists = await chartOfAccountsRepository.findByCode(siteId, acc.code);
      if (exists) {
        continue;
      }

      const newAccount = await chartOfAccountsRepository.createAccount({
        site_id: siteId,
        account_code: acc.code,
        account_name: acc.name,
        account_type: acc.type,
        description: acc.description,
        is_active: true,
        // created_by is optional in repository
        ...(createdByUserId ? { created_by: createdByUserId } : {})
      });

      if (newAccount && newAccount.id) {
        createdAccountIds.push(newAccount.id);
      }
    }

    logger.info(`Seeded default financial accounts for site ${siteId}: ${createdAccountIds.length} created`);
    return { success: true, created: createdAccountIds.length };
  } catch (error) {
    // Best-effort rollback of any accounts created in this run
    try {
      for (const id of createdAccountIds) {
        await chartOfAccountsRepository.deleteById(id);
      }
      logger.warn(`Rolled back ${createdAccountIds.length} seeded accounts for site ${siteId} due to error.`);
    } catch (rollbackError) {
      logger.error('Failed to rollback seeded accounts:', rollbackError);
    }
    logger.error('Failed to seed default accounts:', error);
    throw error;
  }
}

module.exports = {
  seedDefaultAccounts,
  DEFAULT_ACCOUNTS
};