package tools

import (
	"os"
	"os/exec"
	"strings"
	"testing"
)

// TestShellQuote covers the standard case and apostrophes: a value
// containing ' must still be safely shell-quoted (the '\” trick).
func TestShellQuote(t *testing.T) {
	for _, in := range []string{"", "hello", "don't", "it's a 'test'", "a'b'c"} {
		got := shellQuote(in)
		if !strings.HasPrefix(got, "'") || !strings.HasSuffix(got, "'") {
			t.Errorf("shellQuote(%q) = %q: not single-quoted", in, got)
		}
	}
}

// TestSedInPlaceEscapesApostrophe ensures that a replace whose text
// contains an apostrophe doesn't break the shell quoting. This runs the
// generated command for real against a temp file.
func TestSedInPlaceEscapesApostrophe(t *testing.T) {
	dir := t.TempDir()
	path := dir + "/app.conf"
	if err := os.WriteFile(path, []byte("name: don't panic\n"), 0o644); err != nil {
		t.Fatal(err)
	}

	expr := "s/don't/can't/"
	cmd := sedInPlace("", expr, path)

	out, err := exec.Command("sh", "-c", cmd).CombinedOutput()
	if err != nil {
		t.Fatalf("sed command failed: %v\n%s\ncmd=%s", err, out, cmd)
	}

	content, err := os.ReadFile(path)
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(content), "can't panic") {
		t.Errorf("expected replacement with apostrophe, got %q", content)
	}
}