/**
 * Export des données de la base Sandbox SONUM vers un script SQL d'injection.
 * Tables exportées : blocs_fonctionnels, editeurs, etablissements, solutions,
 *                    logiciels_etablissements, consultations, demandes_contact, user_etablissements
 * Tables exclues : users, local_credentials, __drizzle_migrations
 */
import mysql from 'mysql2/promise';
import fs from 'fs';

const TABLES_TO_EXPORT = [
  'blocs_fonctionnels',
  'editeurs',
  'etablissements',
  'solutions',
  'logiciels_etablissements',
  'consultations',
  'demandes_contact',
  'user_etablissements',
];

const conn = await mysql.createConnection(process.env.DATABASE_URL);

let sql = `-- Export données SONUM Sandbox → VPS
-- Généré le ${new Date().toISOString()}
-- Tables : ${TABLES_TO_EXPORT.join(', ')}
-- ATTENTION : exclut users, local_credentials, __drizzle_migrations

SET FOREIGN_KEY_CHECKS = 0;
SET SQL_MODE = 'NO_AUTO_VALUE_ON_ZERO';

`;

for (const table of TABLES_TO_EXPORT) {
  console.log(`Exporting table: ${table}...`);
  
  // Récupérer la structure de la table
  const [[createResult]] = await conn.execute(`SHOW CREATE TABLE \`${table}\``);
  const createSQL = createResult['Create Table'];
  
  // Récupérer les données
  const [rows] = await conn.execute(`SELECT * FROM \`${table}\``);
  
  sql += `-- ─────────────────────────────────────────────────────────────────\n`;
  sql += `-- Table: ${table} (${rows.length} lignes)\n`;
  sql += `-- ─────────────────────────────────────────────────────────────────\n`;
  sql += `TRUNCATE TABLE \`${table}\`;\n\n`;
  
  if (rows.length === 0) {
    sql += `-- (aucune donnée)\n\n`;
    continue;
  }
  
  // Générer les INSERT par lots de 50
  const columns = Object.keys(rows[0]);
  const colList = columns.map(c => `\`${c}\``).join(', ');
  
  const BATCH_SIZE = 50;
  for (let i = 0; i < rows.length; i += BATCH_SIZE) {
    const batch = rows.slice(i, i + BATCH_SIZE);
    const values = batch.map(row => {
      const vals = columns.map(col => {
        const v = row[col];
        if (v === null || v === undefined) return 'NULL';
        if (typeof v === 'number' || typeof v === 'bigint') return String(v);
        if (typeof v === 'boolean') return v ? '1' : '0';
        if (v instanceof Date) return `'${v.toISOString().slice(0, 19).replace('T', ' ')}'`;
        // Escape string
        const escaped = String(v)
          .replace(/\\/g, '\\\\')
          .replace(/'/g, "\\'")
          .replace(/\n/g, '\\n')
          .replace(/\r/g, '\\r')
          .replace(/\0/g, '\\0');
        return `'${escaped}'`;
      });
      return `(${vals.join(', ')})`;
    });
    sql += `INSERT INTO \`${table}\` (${colList}) VALUES\n${values.join(',\n')};\n`;
  }
  sql += `\n`;
}

sql += `SET FOREIGN_KEY_CHECKS = 1;\n`;
sql += `-- Fin de l'export\n`;

await conn.end();

const outputPath = '/home/ubuntu/sonum_data_export.sql';
fs.writeFileSync(outputPath, sql, 'utf8');

const stats = fs.statSync(outputPath);
console.log(`\nExport terminé : ${outputPath}`);
console.log(`Taille : ${(stats.size / 1024).toFixed(1)} KB`);
console.log(`\nRésumé par table :`);
for (const table of TABLES_TO_EXPORT) {
  const matches = sql.match(new RegExp(`-- Table: ${table} \\((\\d+) lignes\\)`));
  if (matches) console.log(`  ${table}: ${matches[1]} lignes`);
}