package scanner_test

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"testing"

	"github.com/jinzhu/gorm"
	_ "github.com/jinzhu/gorm/dialects/sqlite"
	"github.com/matryer/is"

	"go.senan.xyz/gonic/server/db"
	"go.senan.xyz/gonic/server/mockfs"
)

func TestMain(m *testing.M) {
	log.SetOutput(ioutil.Discard)
	os.Exit(m.Run())
}

func TestTableCounts(t *testing.T) {
	t.Parallel()
	is := is.NewRelaxed(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddItems()
	m.ScanAndClean()

	var tracks int
	is.NoErr(m.DB().Model(&db.Track{}).Count(&tracks).Error) // not all tracks
	is.Equal(tracks, 3*3*3)                                  // not all tracks

	var albums int
	is.NoErr(m.DB().Model(&db.Album{}).Count(&albums).Error) // not all albums
	is.Equal(albums, 13)                                     // not all albums

	var artists int
	is.NoErr(m.DB().Model(&db.Artist{}).Count(&artists).Error) // not all artists
	is.Equal(artists, 3)                                       // not all artists
}

func TestParentID(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddItems()
	m.ScanAndClean()

	var nullParentAlbums []*db.Album
	is.NoErr(m.DB().Where("parent_id IS NULL").Find(&nullParentAlbums).Error) // one parent_id=NULL which is root folder
	is.Equal(len(nullParentAlbums), 1)                                        // one parent_id=NULL which is root folder
	is.Equal(nullParentAlbums[0].LeftPath, "")
	is.Equal(nullParentAlbums[0].RightPath, ".")

	is.Equal(m.DB().Where("id=parent_id").Find(&db.Album{}).Error, gorm.ErrRecordNotFound) // no self-referencing albums

	var album db.Album
	var parent db.Album
	is.NoErr(m.DB().Find(&album, "left_path=? AND right_path=?", "artist-0/", "album-0").Error) // album has parent ID
	is.NoErr(m.DB().Find(&parent, "right_path=?", "artist-0").Error)                            // album has parent ID
	is.Equal(album.ParentID, parent.ID)                                                         // album has parent ID
}

func TestUpdatedCover(t *testing.T) {
	t.Parallel()
	is := is.NewRelaxed(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddItems()
	m.ScanAndClean()
	m.AddCover("artist-0/album-0/cover.jpg")
	m.ScanAndClean()

	var album db.Album
	is.NoErr(m.DB().Where("left_path=? AND right_path=?", "artist-0/", "album-0").Find(&album).Error) // album has cover
	is.Equal(album.Cover, "cover.jpg")                                                                // album has cover
}

func TestCoverBeforeTracks(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddCover("artist-2/album-2/cover.jpg")
	m.ScanAndClean()
	m.AddItems()
	m.ScanAndClean()

	var album db.Album
	is.NoErr(m.DB().Preload("TagArtist").Where("left_path=? AND right_path=?", "artist-2/", "album-2").Find(&album).Error) // album has cover
	is.Equal(album.Cover, "cover.jpg")                                                                                     // album has cover
	is.Equal(album.TagArtist.Name, "artist-2")                                                                             // album artist

	var tracks []*db.Track
	is.NoErr(m.DB().Where("album_id=?", album.ID).Find(&tracks).Error) // album has tracks
	is.Equal(len(tracks), 3)                                           // album has tracks
}

func TestUpdatedTags(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddTrack("artist-10/album-10/track-10.flac")
	m.SetTags("artist-10/album-10/track-10.flac", func(tags *mockfs.Tags) {
		tags.RawArtist = "artist"
		tags.RawAlbumArtist = "album-artist"
		tags.RawAlbum = "album"
		tags.RawTitle = "title"
	})

	m.ScanAndClean()

	var track db.Track
	is.NoErr(m.DB().Preload("Album").Preload("Artist").Where("filename=?", "track-10.flac").Find(&track).Error) // track has tags
	is.Equal(track.TagTrackArtist, "artist")                                                                    // track has tags
	is.Equal(track.Artist.Name, "album-artist")                                                                 // track has tags
	is.Equal(track.Album.TagTitle, "album")                                                                     // track has tags
	is.Equal(track.TagTitle, "title")                                                                           // track has tags

	m.SetTags("artist-10/album-10/track-10.flac", func(tags *mockfs.Tags) {
		tags.RawArtist = "artist-upd"
		tags.RawAlbumArtist = "album-artist-upd"
		tags.RawAlbum = "album-upd"
		tags.RawTitle = "title-upd"
	})

	m.ScanAndClean()

	var updated db.Track
	is.NoErr(m.DB().Preload("Album").Preload("Artist").Where("filename=?", "track-10.flac").Find(&updated).Error) // updated has tags
	is.Equal(updated.ID, track.ID)                                                                                // updated has tags
	is.Equal(updated.TagTrackArtist, "artist-upd")                                                                // updated has tags
	is.Equal(updated.Artist.Name, "album-artist-upd")                                                             // updated has tags
	is.Equal(updated.Album.TagTitle, "album-upd")                                                                 // updated has tags
	is.Equal(updated.TagTitle, "title-upd")                                                                       // updated has tags
}

func TestDelete(t *testing.T) {
	t.Parallel()
	is := is.NewRelaxed(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddItems()
	m.ScanAndClean()

	var album db.Album
	is.NoErr(m.DB().Where("left_path=? AND right_path=?", "artist-2/", "album-2").Find(&album).Error) // album exists

	m.RemoveAll("artist-2/album-2")
	m.ScanAndClean()

	is.Equal(m.DB().Where("left_path=? AND right_path=?", "artist-2/", "album-2").Find(&album).Error, gorm.ErrRecordNotFound) // album doesn't exist
}

func TestGenres(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	albumGenre := func(artist, album, genre string) error {
		return m.DB().
			Where("albums.left_path=? AND albums.right_path=? AND genres.name=?", artist, album, genre).
			Joins("JOIN albums ON albums.id=album_genres.album_id").
			Joins("JOIN genres ON genres.id=album_genres.genre_id").
			Find(&db.AlbumGenre{}).
			Error
	}
	isAlbumGenre := func(artist, album, genreName string) {
		is.Helper()
		is.NoErr(albumGenre(artist, album, genreName))
	}
	isAlbumGenreMissing := func(artist, album, genreName string) {
		is.Helper()
		is.Equal(albumGenre(artist, album, genreName), gorm.ErrRecordNotFound)
	}

	trackGenre := func(artist, album, filename, genreName string) error {
		return m.DB().
			Where("albums.left_path=? AND albums.right_path=? AND tracks.filename=? AND genres.name=?", artist, album, filename, genreName).
			Joins("JOIN tracks ON tracks.id=track_genres.track_id").
			Joins("JOIN genres ON genres.id=track_genres.genre_id").
			Joins("JOIN albums ON albums.id=tracks.album_id").
			Find(&db.TrackGenre{}).
			Error
	}
	isTrackGenre := func(artist, album, filename, genreName string) {
		is.Helper()
		is.NoErr(trackGenre(artist, album, filename, genreName))
	}
	isTrackGenreMissing := func(artist, album, filename, genreName string) {
		is.Helper()
		is.Equal(trackGenre(artist, album, filename, genreName), gorm.ErrRecordNotFound)
	}

	genre := func(genre string) error {
		return m.DB().Where("name=?", genre).Find(&db.Genre{}).Error
	}
	isGenre := func(genreName string) {
		is.Helper()
		is.NoErr(genre(genreName))
	}
	isGenreMissing := func(genreName string) {
		is.Helper()
		is.Equal(genre(genreName), gorm.ErrRecordNotFound)
	}

	m.AddItems()
	m.SetTags("artist-0/album-0/track-0.flac", func(tags *mockfs.Tags) { tags.RawGenre = "genre-a;genre-b" })
	m.SetTags("artist-0/album-0/track-1.flac", func(tags *mockfs.Tags) { tags.RawGenre = "genre-c;genre-d" })
	m.SetTags("artist-1/album-2/track-0.flac", func(tags *mockfs.Tags) { tags.RawGenre = "genre-e;genre-f" })
	m.SetTags("artist-1/album-2/track-1.flac", func(tags *mockfs.Tags) { tags.RawGenre = "genre-g;genre-h" })
	m.ScanAndClean()

	isGenre("genre-a") // genre exists
	isGenre("genre-b") // genre exists
	isGenre("genre-c") // genre exists
	isGenre("genre-d") // genre exists

	isTrackGenre("artist-0/", "album-0", "track-0.flac", "genre-a") // track genre exists
	isTrackGenre("artist-0/", "album-0", "track-0.flac", "genre-b") // track genre exists
	isTrackGenre("artist-0/", "album-0", "track-1.flac", "genre-c") // track genre exists
	isTrackGenre("artist-0/", "album-0", "track-1.flac", "genre-d") // track genre exists
	isTrackGenre("artist-1/", "album-2", "track-0.flac", "genre-e") // track genre exists
	isTrackGenre("artist-1/", "album-2", "track-0.flac", "genre-f") // track genre exists
	isTrackGenre("artist-1/", "album-2", "track-1.flac", "genre-g") // track genre exists
	isTrackGenre("artist-1/", "album-2", "track-1.flac", "genre-h") // track genre exists

	isAlbumGenre("artist-0/", "album-0", "genre-a") // album genre exists
	isAlbumGenre("artist-0/", "album-0", "genre-b") // album genre exists

	m.SetTags("artist-0/album-0/track-0.flac", func(tags *mockfs.Tags) { tags.RawGenre = "genre-aa;genre-bb" })
	m.ScanAndClean()

	isTrackGenre("artist-0/", "album-0", "track-0.flac", "genre-aa")       // updated track genre exists
	isTrackGenre("artist-0/", "album-0", "track-0.flac", "genre-bb")       // updated track genre exists
	isTrackGenreMissing("artist-0/", "album-0", "track-0.flac", "genre-a") // old track genre missing
	isTrackGenreMissing("artist-0/", "album-0", "track-0.flac", "genre-b") // old track genre missing

	isAlbumGenreMissing("artist-0/", "album-0", "genre-a") // old album genre missing
	isAlbumGenreMissing("artist-0/", "album-0", "genre-b") // old album genre missing

	isGenreMissing("genre-a") // old genre missing
	isGenreMissing("genre-b") // old genre missing
}

func TestMultiFolders(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.NewWithDirs(t, []string{"m-1", "m-2", "m-3"})
	defer m.CleanUp()

	m.AddItemsPrefix("m-1")
	m.AddItemsPrefix("m-2")
	m.AddItemsPrefix("m-3")
	m.ScanAndClean()

	var rootDirs []*db.Album
	is.NoErr(m.DB().Where("parent_id IS NULL").Find(&rootDirs).Error)
	is.Equal(len(rootDirs), 3)
	for i, r := range rootDirs {
		is.Equal(r.RootDir, filepath.Join(m.TmpDir(), fmt.Sprintf("m-%d", i+1)))
		is.Equal(r.ParentID, 0)
		is.Equal(r.LeftPath, "")
		is.Equal(r.RightPath, ".")
	}

	m.AddCover("m-3/artist-0/album-0/cover.jpg")
	m.ScanAndClean()
	m.LogItems()

	checkCover := func(root string, q string) {
		is.Helper()
		is.NoErr(m.DB().Where(q, filepath.Join(m.TmpDir(), root)).Find(&db.Album{}).Error)
	}

	checkCover("m-1", "root_dir=? AND cover IS NULL")     // mf 1 no cover
	checkCover("m-2", "root_dir=? AND cover IS NULL")     // mf 2 no cover
	checkCover("m-3", "root_dir=? AND cover='cover.jpg'") // mf 3 has cover
}

func TestNewAlbumForExistingArtist(t *testing.T) {
	t.Parallel()
	is := is.New(t)
	m := mockfs.New(t)
	defer m.CleanUp()

	m.AddItems()
	m.ScanAndClean()

	m.LogAlbums()
	m.LogArtists()

	var artist db.Artist
	is.NoErr(m.DB().Where("name=?", "artist-2").Find(&artist).Error) // find orig artist
	is.True(artist.ID > 0)

	for tr := 0; tr < 3; tr++ {
		m.AddTrack(fmt.Sprintf("artist-2/new-album/track-%d.mp3", tr))
		m.SetTags(fmt.Sprintf("artist-2/new-album/track-%d.mp3", tr), func(tags *mockfs.Tags) {
			tags.RawArtist = "artist-2"
			tags.RawAlbumArtist = "artist-2"
			tags.RawAlbum = "new-album"
			tags.RawTitle = fmt.Sprintf("title-%d", tr)
		})
	}

	var updated db.Artist
	is.NoErr(m.DB().Where("name=?", "artist-2").Find(&updated).Error) // find updated artist
	is.Equal(artist.ID, updated.ID)                                   // find updated artist

	var all []*db.Artist
	is.NoErr(m.DB().Find(&all).Error) // still only 3?
	is.Equal(len(all), 3)             // still only 3?
}