const DevManagementService = require('../../services/dev/DevManagementService');
const { logger } = require('../../middleware/logger');

function previewSql(sql, max = 180) {
  if (!sql) return '';
  const s = String(sql).replace(/\s+/g, ' ').trim();
  return s.length > max ? `${s.slice(0, max)}…` : s;
}

exports.importSqlDump = async (req, res) => {
  try {
    if (!req.file || !req.file.buffer) {
      return res.status(400).json({ success: false, error: 'SQL dump file is required' });
    }
    const sql = req.file.buffer.toString('utf8');
    if (!sql.trim()) {
      return res.status(400).json({ success: false, error: 'SQL dump file is empty' });
    }
    const start = Date.now();
    const { rows, fields } = await DevManagementService.executeDump(sql);
    const durationMs = Date.now() - start;

    const isMulti = Array.isArray(fields) && fields.length > 0 && Array.isArray(fields[0]);

    return res.json({
      success: true,
      data: { result: rows, isMulti: !!isMulti },
      meta: { durationMs }
    });
  } catch (e) {
    logger.error('[DevManagementController.importSqlDump] error', { msg: e?.message, sql: previewSql(req.file?.buffer?.toString('utf8')) });
    return res.status(500).json({ success: false, error: e?.message || 'SQL execution failed' });
  }
};