package metadata

import (
	"context"
	"os/exec"
	"path/filepath"
	"testing"
	"time"
)

func TestProbeRealFile(t *testing.T) {
	ffmpegPath, err := exec.LookPath("ffmpeg")
	if err != nil {
		t.Skip("ffmpeg not installed, skipping integration test")
	}
	if _, err := exec.LookPath("ffprobe"); err != nil {
		t.Skip("ffprobe not installed, skipping integration test")
	}

	dir := t.TempDir()
	out := filepath.Join(dir, "test.mp3")

	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	cmd := exec.CommandContext(ctx, ffmpegPath,
		"-f", "lavfi", "-i", "sine=frequency=440:duration=1",
		"-metadata", "title=Integration Title",
		"-metadata", "artist=Integration Artist",
		"-metadata", "album=Integration Album",
		"-metadata", "track=5/10",
		"-codec:a", "libmp3lame", "-b:a", "64k",
		out,
	)
	if combined, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("ffmpeg failed: %v\n%s", err, combined)
	}

	p := &Prober{}
	tags, err := p.Probe(ctx, out)
	if err != nil {
		t.Fatalf("Probe: %v", err)
	}
	if tags.Title != "Integration Title" {
		t.Errorf("Title = %q, want %q", tags.Title, "Integration Title")
	}
	if len(tags.Artists) != 1 || tags.Artists[0] != "Integration Artist" {
		t.Errorf("Artists = %v", tags.Artists)
	}
	if tags.Album != "Integration Album" {
		t.Errorf("Album = %q", tags.Album)
	}
	if tags.TrackNumber != 5 || tags.TrackTotal != 10 {
		t.Errorf("Track = %d/%d, want 5/10", tags.TrackNumber, tags.TrackTotal)
	}
	if tags.DurationSeconds < 0.9 || tags.DurationSeconds > 1.5 {
		t.Errorf("DurationSeconds = %v, want ~1", tags.DurationSeconds)
	}
	if tags.SampleRateHz == 0 {
		t.Error("SampleRateHz = 0, want > 0")
	}
	if tags.Kind != "song" {
		t.Errorf("Kind = %q, want song", tags.Kind)
	}
}

func TestProbeRejectsMissingFile(t *testing.T) {
	if _, err := exec.LookPath("ffprobe"); err != nil {
		t.Skip("ffprobe not installed, skipping integration test")
	}
	p := &Prober{}
	if _, err := p.Probe(context.Background(), "/nonexistent/path/does-not-exist.mp3"); err == nil {
		t.Fatal("expected error probing a nonexistent file")
	}
}