package music_test

import (
	"arimelody-web/errors"
	"arimelody-web/model"
	repository "arimelody-web/repository/music"
	service "arimelody-web/service/music"
	"log"
	"os"
	"slices"
	"testing"
	"time"

	"gotest.tools/v3/assert"
)

func Test_Artist(t *testing.T) {
    devNullFile, err := os.OpenFile(os.DevNull, os.O_RDWR, 0666)
    if err != nil { panic(err) }
    defer devNullFile.Close()

    repo := repository.NewMusicRepositoryMemory(
        make([]*model.Artist, 0),
        make([]*model.Release, 0),
        make([]*model.Track, 0),
    )
    s = service.NewMusicService(
        repo,
        log.New(devNullFile, "", model.DEFAULT_LOG_FLAGS),
    )

    id := "cool-artist"
    name := "Cool Artist"
    website := "artist.arimelody.space"
    avatarURL := "/img/cool-artist.webp"

    t.Run("artists should start empty", func(t *testing.T) {
        t.Run("count is zero", func(t *testing.T) {
            if num, err := s.GetArtistCount(); err != nil {
                t.Errorf("Failed to get number of artists: %v", err)
            } else {
                assert.Equal(t, num, 0)
            }
        })

        t.Run("service returns empty array", func(t *testing.T) {
            if artists, err := s.GetAllArtists(); err != nil {
                t.Errorf("Failed to get artists: %v", err)
            } else {
                assert.Equal(t, len(artists), 0)
            }
        })
    })

    t.Run("can create artist", func(t *testing.T) {
        if err := s.CreateArtist(id, name, website, avatarURL); err != nil {
            t.Errorf("Failed to create artist: %v", err)
        }

        t.Run("but not with an invalid ID", func(t *testing.T) {
            if err := s.CreateArtist("", name, website, avatarURL); err == nil {
                t.Error("Created artist with invalid ID")
            }
        })
        t.Run("but not with an invalid name", func(t *testing.T) {
            if err := s.CreateArtist("test-artist", "", website, avatarURL); err == nil {
                t.Error("Created artist with invalid name")
            }
        })

        t.Run("and retrieve it", func(t *testing.T) {
            repoArtist, err := s.GetArtistByID(id)
            if err != nil { t.Errorf("Failed to get artist: %v", err) }

            assert.Equal(t, repoArtist.ID, id)
            assert.Equal(t, repoArtist.Name, name)
            assert.Equal(t, repoArtist.Website, website)
            assert.Equal(t, repoArtist.Avatar, avatarURL)
        })
    })

    t.Run("number of artists should increment", func(t *testing.T) {
        t.Run("count is one", func(t *testing.T) {
            if num, err := s.GetArtistCount(); err != nil {
                t.Errorf("Failed to get number of artists: %v", err)
            } else {
                assert.Equal(t, num, 1)
            }
        })

        t.Run("service returns array with one artist", func(t *testing.T) {
            if artists, err := s.GetAllArtists(); err != nil {
                t.Errorf("Failed to get artists: %v", err)
            } else {
                assert.Equal(t, len(artists), 1)
            }
        })
    })

    releaseID := "test-release"
    t.Run("can get artists not on a release", func(t *testing.T) {
        if err := s.CreateRelease(releaseID, "test", string(model.Single), time.Now(), ""); err != nil {
            t.Errorf("Failed to create release: %v", err)
        }

        artists, err := s.GetArtistsNotOnRelease(releaseID)
        if err != nil { t.Errorf("Failed to get artists: %v", err) }

        assert.Assert(t, slices.ContainsFunc(artists, func(artist *model.Artist) bool {
            return artist.ID == id
        }))
    })

    credit := &model.Credit{
        Artist: &model.Artist{ ID: id, Name: name, Website: website, Avatar: avatarURL },
        Role: "did a lot of stuff",
        Primary: true,
    }
    t.Run("can get artist credits", func(t *testing.T) {
        if err := s.UpdateReleaseCredits(releaseID, []*model.Credit{ credit }); err != nil {
            t.Errorf("Failed to update release credits: %v", err)
        }

        credits, err := s.GetArtistCredits(id, true)
        if err != nil { t.Errorf("Failed to get credits: %v", err) }

        index := slices.IndexFunc(credits, func(credit *model.Credit) bool {
            return credit.Artist.ID == id
        })
        assert.Assert(t, index != -1)
        assert.Equal(t, credits[index].Artist.ID, id)
        assert.Equal(t, credits[index].Artist.Name, name)
        assert.Equal(t, credits[index].Artist.Website, website)
        assert.Equal(t, credits[index].Artist.Avatar, avatarURL)
        assert.Equal(t, credits[index].Role, credit.Role)
        assert.Equal(t, credits[index].Primary, credit.Primary)
    })

    t.Run("can update artist", func(t *testing.T) {
        testName := "this name is only temporary"
        testWebsite := "https://test.example.org"
        testAvatar := "/img/test-avatar.webp"
        if err := s.UpdateArtist(&model.Artist{
            ID: id,
            Name: testName,
            Website: testWebsite,
            Avatar: testAvatar,
        }); err != nil {
            t.Errorf("Failed to update artist: %v", err)
        }

        artist, err := s.GetArtistByID(id)
        if err != nil { t.Errorf("Failed to get artist: %v", err) }
        assert.Equal(t, artist.Name, testName)
        assert.Equal(t, artist.Website, testWebsite)
        assert.Equal(t, artist.GetAvatar(), testAvatar)

        t.Run("but not with invalid name", func(t *testing.T) {
            if err := s.UpdateArtist(&model.Artist{
                ID: id,
                Name: "",
            }); err == nil {
                t.Errorf("Updated artist name to invalid value")
            }
        })
    })

    t.Run("can update artist name", func(t *testing.T) {
        if err := s.UpdateArtistName(id, name); err != nil {
            t.Errorf("Failed to update artist: %v", err)
        }

        artist, err := s.GetArtistByID(id)
        if err != nil { t.Errorf("Failed to get artist: %v", err) }
        assert.Equal(t, artist.Name, name)

        t.Run("but not with invalid value", func(t *testing.T) {
            if err := s.UpdateArtistName(id, ""); err == nil {
                t.Errorf("Updated artist name to invalid value")
            }
        })
    })

    t.Run("can update artist website", func(t *testing.T) {
        if err := s.UpdateArtistWebsite(id, website); err != nil {
            t.Errorf("Failed to update artist: %v", err)
        }

        artist, err := s.GetArtistByID(id)
        if err != nil { t.Errorf("Failed to get artist: %v", err) }
        assert.Equal(t, artist.Website, website)
    })

    t.Run("can update artist avatar", func(t *testing.T) {
        if err := s.UpdateArtistAvatar(id, ""); err != nil {
            t.Errorf("Failed to update artist: %v", err)
        }

        artist, err := s.GetArtistByID(id)
        if err != nil { t.Errorf("Failed to get artist: %v", err) }
        assert.Equal(t, artist.GetAvatar(), model.DEFAULT_AVATAR_URL)
    })

    t.Run("can delete artist", func(t *testing.T) {
        if err := s.DeleteArtist(id); err != nil {
            t.Errorf("Failed to delete artist: %v", err)
        }

        t.Run("no longer exists", func(t *testing.T) {
            if artist, err := s.GetArtistByID(id); err == nil {
                t.Error("No error getting artist")
            } else if artist != nil {
                t.Error("Artist with this ID still exists")
            }
        })

        t.Run("but not one that doesn't exist", func(t *testing.T) {
            if err := s.DeleteArtist("some-garbage-id"); err == nil {
                if !errors.IsNotExistError(err) {
                    t.Errorf("Failed to delete artist: %v", err)
                }
            }
        })
    })
}