package infra

import (
	"strings"
	"testing"

	"radio-go/internal/domain"
)

func TestWriteM3U(t *testing.T) {
	pl := []domain.Track{
		{ID: "a", Title: "Alpha", Duration: 123.7},
		{ID: "b", Title: "", Style: "beta style", Duration: 45},
	}
	got := WriteM3U("My Station", pl)
	want := "#EXTM3U\n" +
		"#EXTINF:123,My Station - Alpha\na.mp3\n" +
		"#EXTINF:45,My Station - beta style\nb.mp3\n"
	if got != want {
		t.Fatalf("m3u mismatch:\n got:\n%s\nwant:\n%s", got, want)
	}
}

func TestM3ULineSafe(t *testing.T) {
	pl := []domain.Track{{ID: "x", Title: "evil\n#EXTINF:99,hack", Duration: 1}}
	got := WriteM3U("st", pl)
	lines := strings.Split(strings.TrimSpace(got), "\n")
	// header + 1 extinf + 1 file = 3 lines; the injected newline must be neutralized
	if len(lines) != 3 {
		t.Fatalf("newline injection not sanitized: %q", got)
	}
	if strings.Contains(lines[1], "\n") || strings.Count(got, "#EXTINF") != 1 {
		t.Fatalf("injected EXTINF survived: %q", got)
	}
}