package sidekick

import (
  "fmt"
  "os"
)

// BufferGate checks if a result is too large. If it is, it writes it to a temp file
// and returns a pointer message instead. The path is added to tempFiles for later cleanup.
func BufferGate(result string, tempFiles *[]string, threshold int) (string, error) {
  if len(result) <= threshold {
    return result, nil
  }

  tmpFile, err := os.CreateTemp("", "sidekick-buf-*.txt")
  if err != nil {
    return "", fmt.Errorf("failed to create temp file for buffering: %w", err)
  }

  _, err = tmpFile.WriteString(result)
  if err != nil {
    tmpFile.Close()
    return "", fmt.Errorf("failed to write to temp file: %w", err)
  }
  tmpFile.Close()

  *tempFiles = append(*tempFiles, tmpFile.Name())

  msg := fmt.Sprintf(
    "Tool result is available in file '%s'. File size: %d bytes. Use read_file or grep_file to access it.",
    tmpFile.Name(), len(result),
  )
  return msg, nil
}