/**
 * quiXzoom Frilans Payout — Database Layer
 * Raw SQL via pg (no ORM per REXO standards)
 */

import pg from 'pg';
const { Pool } = pg;

const pool = new Pool({
  connectionString: process.env.DATABASE_URL || 'postgresql://wavult_admin:EgoVVPQuVSioCiMgJWmMoVvnjgiJPaD6hPR8xkZo@wavult-identity-core.cvi0qcksmsfj.eu-north-1.rds.amazonaws.com:5432/wavult_identity',
  ssl: { rejectUnauthorized: false },
});

// ── Frilans Accounts ────────────────────────────────────────────────────────

export async function createAccount(data) {
  const { userId, country, currency, taxHandling, personalNumber, payoutMethod } = data;
  
  const result = await pool.query(`
    INSERT INTO frilans_accounts (user_id, country, currency, tax_handling, personal_number, payout_method)
    VALUES ($1, $2, $3, $4, $5, $6)
    RETURNING *
  `, [userId, country, currency, taxHandling, personalNumber, payoutMethod]);
  
  return result.rows[0];
}

export async function getAccountByUserId(userId) {
  const result = await pool.query(
    'SELECT * FROM frilans_accounts WHERE user_id = $1 AND status = $2',
    [userId, 'active']
  );
  return result.rows[0] || null;
}

export async function updateAccount(accountId, updates) {
  const fields = Object.keys(updates);
  const values = Object.values(updates);
  const setClause = fields.map((f, i) => `${f} = $${i + 2}`).join(', ');
  
  const result = await pool.query(`
    UPDATE frilans_accounts 
    SET ${setClause}, updated_at = NOW()
    WHERE id = $1
    RETURNING *
  `, [accountId, ...values]);
  
  return result.rows[0];
}

// ── Payouts ─────────────────────────────────────────────────────────────────

export async function createPayout(data) {
  const { accountId, amount, netAmount, currency, platformFee, processingFee, taxAmount, method, scheduledDate } = data;
  
  const result = await pool.query(`
    INSERT INTO frilans_payouts (account_id, amount, net_amount, currency, platform_fee, processing_fee, tax_amount, method, scheduled_date)
    VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
    RETURNING *
  `, [accountId, amount, netAmount, currency, platformFee, processingFee, taxAmount, method, scheduledDate]);
  
  return result.rows[0];
}

export async function listPayouts(accountId) {
  const result = await pool.query(
    'SELECT * FROM frilans_payouts WHERE account_id = $1 ORDER BY created_at DESC',
    [accountId]
  );
  return result.rows;
}

export async function getPayoutById(payoutId) {
  const result = await pool.query(
    'SELECT * FROM frilans_payouts WHERE id = $1',
    [payoutId]
  );
  return result.rows[0] || null;
}

// ── Documents ───────────────────────────────────────────────────────────────

export async function createDocument(data) {
  const { accountId, type, s3Url } = data;
  
  const result = await pool.query(`
    INSERT INTO frilans_documents (account_id, type, s3_url, status)
    VALUES ($1, $2, $3, $4)
    RETURNING *
  `, [accountId, type, s3Url, 'verified']);
  
  return result.rows[0];
}

export async function listDocuments(accountId) {
  const result = await pool.query(
    'SELECT * FROM frilans_documents WHERE account_id = $1 ORDER BY uploaded_at DESC',
    [accountId]
  );
  return result.rows;
}

// ── Tax Summary ─────────────────────────────────────────────────────────────

export async function getTaxSummary(accountId, year) {
  const result = await pool.query(`
    SELECT 
      COALESCE(SUM(amount), 0) as total_earnings,
      COALESCE(SUM(tax_amount), 0) as total_tax_paid,
      COALESCE(SUM(platform_fee + processing_fee), 0) as total_fees_paid,
      COALESCE(SUM(net_amount), 0) as net_earnings
    FROM frilans_payouts 
    WHERE account_id = $1 
      AND EXTRACT(YEAR FROM created_at) = $2
      AND status = 'completed'
  `, [accountId, year]);
  
  return result.rows[0];
}

// ── Health Check ────────────────────────────────────────────────────────────

export async function healthCheck() {
  const result = await pool.query('SELECT NOW()');
  return result.rows[0];
}