package asr

import (
	"bytes"
	"context"
	"os/exec"
	"syscall"
)

// runFunc executes binary with args, feeding stdin, and returns
// stdout/stderr. It's a seam so tests can substitute a fake process instead
// of requiring the real qwen_asr binary and a multi-GB model on disk.
type runFunc func(ctx context.Context, binary string, args []string, stdin []byte) (stdout, stderr []byte, err error)

func runCommand(ctx context.Context, binary string, args []string, stdin []byte) ([]byte, []byte, error) {
	cmd := exec.CommandContext(ctx, binary, args...)
	cmd.Stdin = bytes.NewReader(stdin)
	var stdout, stderr bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Stderr = &stderr
	// Run qwen_asr in its own process group so the terminal's Ctrl+C
	// (SIGINT to the whole foreground process group) doesn't kill an
	// in-flight transcription directly. It's still cancelable through ctx,
	// same as before — this only stops the shell from also signaling it.
	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
	err := cmd.Run()
	return stdout.Bytes(), stderr.Bytes(), err
}