<?php
/**
 * Migration: Fügt invoice_id Spalte zu journal_entries hinzu
 * Ausführen: php tools/migrate_journal_invoice_link.php
 */

require_once __DIR__ . '/../src/config.php';
require_once __DIR__ . '/../src/db.php';

$pdo = get_db();

echo "Migration: journal_entries.invoice_id\n";

try {
    // Prüfen ob Spalte existiert
    $stmt = $pdo->query("SELECT column_name FROM information_schema.columns
                         WHERE table_name = 'journal_entries' AND column_name = 'invoice_id'");
    $exists = $stmt->fetch();

    if ($exists) {
        echo "Spalte invoice_id existiert bereits.\n";
    } else {
        // Spalte hinzufügen
        $pdo->exec("ALTER TABLE journal_entries ADD COLUMN invoice_id INTEGER REFERENCES invoices(id) ON DELETE SET NULL");
        echo "Spalte invoice_id hinzugefügt.\n";

        // Index erstellen
        $pdo->exec("CREATE INDEX IF NOT EXISTS idx_journal_entries_invoice ON journal_entries(invoice_id)");
        echo "Index erstellt.\n";
    }

    echo "Migration erfolgreich!\n";
} catch (PDOException $e) {
    echo "Fehler: " . $e->getMessage() . "\n";
    exit(1);
}