function quoteIdentifier(identifier) {
    return `\`${identifier.replace(/`/g, "``")}\``;
}
export default async function ({ sql: passedSql, table, data }) {
    const config = global.CONFIG;
    const dbSchema = global.DB_SCHEMA;
    const tableSchema = dbSchema?.tables.find((t) => t.tableName == table);
    if (!tableSchema?.tableName) {
        return passedSql;
    }
    const dataObject = Array.isArray(data) ? data[0] : data;
    const dataKeys = Object.keys(dataObject || {});
    if (dataKeys.length === 0) {
        return passedSql;
    }
    const hasUniqueField = tableSchema.fields.some((field) => field.unique) || Boolean(tableSchema.uniqueConstraints?.length);
    if (!hasUniqueField) {
        return passedSql;
    }
    const setSql = dataKeys
        .filter((field) => field !== "updated_at")
        .map((field) => `${quoteIdentifier(field)} = VALUES(${quoteIdentifier(field)})`);
    setSql.push(`updated_at = ${Date.now()}`);
    return `${passedSql} ON DUPLICATE KEY UPDATE ${setSql.join(", ")}`;
}