package runner

import (
	"bytes"
	"io"
	"os"
	"os/exec"
	"strings"
)

// Stream runs rg with args, streaming stdout/stderr directly to the terminal.
func RgStream(args ...string) error {
	cmd := exec.Command("rg", args...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	return cmd.Run()
}

// ListFiles runs rg -l (files-with-matches) and returns the list of matching file paths.
func RgListFiles(pattern, path string, extraArgs ...string) ([]string, error) {
	args := append([]string{"-l", pattern, path}, extraArgs...)
	cmd := exec.Command("rg", args...)
	var out bytes.Buffer
	cmd.Stdout = &out
	cmd.Stderr = io.Discard
	if err := cmd.Run(); err != nil {
		// exit code 1 means no matches — not an error for our purposes
		if cmd.ProcessState != nil && cmd.ProcessState.ExitCode() == 1 {
			return nil, nil
		}
		return nil, err
	}
	return splitLines(out.String()), nil
}

func splitLines(s string) []string {
	s = strings.TrimRight(s, "\n")
	if s == "" {
		return nil
	}
	return strings.Split(s, "\n")
}