package uploads

import (
	"testing"

	"github.com/google/uuid"
	"github.com/stretchr/testify/require"
	"pipu/api/internal/library"
)

func TestReleaseGroupsSeparateAlbumsAndPreserveDiscsAndCompilations(t *testing.T) {
	one := releaseFile("One", 1, 1, 180000)
	two := releaseFile("Two", 1, 2, 180000)
	other := releaseFile("Other", 1, 1, 180000)
	other.Meta.Album = "Another album"
	groups := groupReleaseFiles([]File{one, two, other})
	require.Len(t, groups, 2)
	var album []uuid.UUID
	for _, g := range groups {
		if g.Album == "Album" {
			album = g.Files
		}
	}
	require.ElementsMatch(t, []uuid.UUID{one.ID, two.ID}, album)
	// Album artist, rather than each track artist, keeps compilations together.
	one.Meta.Artist = "Singer one"
	two.Meta.Artist = "Singer two"
	one.Meta.AlbumArtist = "Various Artists"
	two.Meta.AlbumArtist = "Various Artists"
	require.Len(t, groupReleaseFiles([]File{one, two}), 1)
	// Without album artist, folder context still keeps the two discs of a compilation together.
	one.Meta.AlbumArtist = ""
	two.Meta.AlbumArtist = ""
	one.ClientRelPath = nullable(`Collection\Compilation\CD1\01.flac`)
	two.ClientRelPath = nullable("Collection/Compilation/Disc 02/01.flac")
	require.Len(t, groupReleaseFiles([]File{one, two}), 1)
}
func TestReleaseGroupsUseFoldersWhenAlbumTagsAreMissing(t *testing.T) {
	one := releaseFile("One", 1, 1, 180000)
	one.Meta.Album = library.UnknownAlbum
	two := releaseFile("Two", 1, 2, 180000)
	two.Meta.Album = ""
	other := releaseFile("Other", 1, 1, 180000)
	other.Meta.Album = library.UnknownAlbum
	one.ClientRelPath = nullable("Artist/First/CD 1/01.flac")
	two.ClientRelPath = nullable("Artist/First/Диск 2/01.flac")
	other.ClientRelPath = nullable("Artist/Second/01.flac")
	require.Len(t, groupReleaseFiles([]File{one, two, other}), 2)
	other.Status = StatusWithdrawn
	require.Len(t, groupReleaseFiles([]File{one, two, other}), 1)
	// Unknown root files stay a single explicitly reviewable group, never invented albums per file.
	one.ClientRelPath = nil
	two.ClientRelPath = nil
	require.Len(t, groupReleaseFiles([]File{one, two}), 1)
}
func TestReleaseGroupsRespectEditionIdentifiersAndKnownMissingTags(t *testing.T) {
	one := releaseFile("One", 1, 1, 180000)
	two := releaseFile("Two", 2, 1, 180000)
	a, b := uuid.NewString(), uuid.NewString()
	one.Tags = map[string]string{"musicbrainz_albumid": a}
	groups := groupReleaseFiles([]File{one, two})
	require.Len(t, groups, 1, "missing ID inherits the sole known edition of the same album")
	key := groups[0].Key
	two.Tags = map[string]string{"musicbrainz_albumid": b}
	require.Len(t, groupReleaseFiles([]File{one, two}), 2, "different known editions must remain separate")
	two.Tags = map[string]string{"musicbrainz_albumid": a}
	two.Meta.Album = "Different spelling"
	groups = groupReleaseFiles([]File{two, one})
	require.Len(t, groups, 1)
	require.Equal(t, key, groups[0].Key)
}