/** Convert SQLite-style @name / ? placeholders to node-pg $n. */

export function bindSql(
  sql: string,
  params?: unknown[] | Record<string, unknown>,
): { text: string; values: unknown[] } {
  if (params == null) return { text: sql, values: [] }
  if (Array.isArray(params)) {
    let i = 0
    const text = sql.replace(/\?/g, () => {
      i += 1
      return `$${i}`
    })
    return { text, values: params }
  }
  const values: unknown[] = []
  const text = sql.replace(/@([a-zA-Z_][a-zA-Z0-9_]*)/g, (_, name: string) => {
    values.push(params[name])
    return `$${values.length}`
  })
  return { text, values }
}