//go:build integration

package uploads

import (
	"context"
	"crypto/sha256"
	"encoding/json"
	"errors"
	"log/slog"
	"os"
	"strings"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/stretchr/testify/require"
	"pipu/api/internal/auth"
	"pipu/api/internal/library"
	"pipu/api/internal/musicbrainz"
	"pipu/api/internal/platform/db"
)

type testReleaseCatalogue struct {
	release  musicbrainz.Release
	searches int
	err      error
}

func (c *testReleaseCatalogue) Search(context.Context, musicbrainz.Query) ([]musicbrainz.Release, error) {
	c.searches++
	return []musicbrainz.Release{c.release}, c.err
}
func (c *testReleaseCatalogue) Cover(context.Context, musicbrainz.Release) (musicbrainz.Cover, error) {
	return musicbrainz.Cover{Data: []byte{0xff, 0xd8, 0xff, 1}, MIME: "image/jpeg", Exact: true}, nil
}

func TestReleaseJobsAndAtomicApplication(t *testing.T) {
	address := os.Getenv("TEST_DATABASE_URL")
	if address == "" {
		t.Skip("TEST_DATABASE_URL is not set")
	}
	ctx := context.Background()
	pool, err := db.Connect(ctx, address)
	require.NoError(t, err)
	defer pool.Close()
	require.NoError(t, db.Migrate(ctx, pool))
	author := uuid.New()
	_, err = pool.Exec(ctx, `INSERT INTO users(id,username,password_hash,role) VALUES($1,$2,'x','admin')`, author, "release-"+author.String())
	require.NoError(t, err)
	source, err := library.NewStore(pool).SaveSource(ctx, library.Source{ID: uuid.New(), Name: "release-test", Type: library.SourceLocal, Status: "mounted", TagsFirst: true, AcceptsUploads: true, WriteTemplate: nullable("{albumartist}/{album}/{track:02} - {title}.{ext}")})
	require.NoError(t, err)
	store := NewStore(pool)
	oldCover := "covers/original.jpg"
	sum1, sum2 := sha256.Sum256([]byte(uuid.NewString())), sha256.Sum256([]byte(uuid.NewString()))
	batch, reserved, err := store.CreateBatch(ctx, author, nil, []NewFile{{ClientID: "1", Name: "one.flac", Size: 10, SHA256: sum1[:]}, {ClientID: "2", Name: "two.flac", Size: 10, SHA256: sum2[:]}}, DefaultSettings, &oldCover)
	require.NoError(t, err)
	require.Len(t, reserved, 2)
	// Isolate from batches produced by other integration tests.
	_, err = pool.Exec(ctx, `UPDATE upload_release_jobs SET state='not_found' WHERE batch_id<>$1`, batch)
	require.NoError(t, err)
	defer func() {
		_, _ = pool.Exec(ctx, `DELETE FROM upload_batches WHERE id=$1`, batch)
		_ = store.ReconcileQuota(ctx)
	}()
	provider := &testReleaseCatalogue{release: musicbrainz.Release{ID: uuid.NewString(), Artist: "Artist", Title: "Album", Type: "Single", Date: "2024-01-01", Tracks: []musicbrainz.Track{
		{Title: "Song 1", Artist: "Artist", Disc: 1, Position: 1, DurationMs: 180000},
		{Title: "Song 2", Artist: "Artist", Disc: 1, Position: 2, DurationMs: 190000},
	}}}
	svc := NewService(store, &previewCatalog{source: source}, previewRoot(t.TempDir()), nil, nil, nil, library.FPCalc{}, Config{StagingDir: t.TempDir()}, slog.New(slog.DiscardHandler))
	svc.SetReleaseCatalogue(provider)
	review := auth.WithPrincipal(ctx, auth.Principal{UserID: author, Role: auth.RoleAdmin, ReviewsUploads: true})
	for i, r := range reserved {
		require.NoError(t, store.ChangeStatus(ctx, r.FileID, []Status{StatusUploading}, StatusProcessing))
		m := Meta{Artist: "Artist", AlbumArtist: "Artist", Album: "Album", Title: "SONG " + string(rune('1'+i))}
		n := i + 1
		m.Track = &n
		raw, _ := json.Marshal(m)
		duration := 180000 + i*10000
		require.NoError(t, store.Transition(ctx, r.FileID, []Status{StatusProcessing}, StatusPendingReview, func(tx pgx.Tx) error {
			_, e := tx.Exec(ctx, `UPDATE upload_files SET metadata=$2,duration_ms=$3 WHERE id=$1`, r.FileID, raw, duration)
			return e
		}))
		if i == 0 {
			_, err = store.ClaimRelease(ctx)
			require.ErrorIs(t, err, ErrNotFound, "lookup waits until the whole batch is processed")
		}
	}
	job, err := store.ClaimRelease(ctx)
	require.NoError(t, err)
	require.Equal(t, batch, job.ID)
	files, err := store.AllInBatch(ctx, batch)
	require.NoError(t, err)
	edited := *files[0].Meta
	year := 2025
	edited.Year = &year
	require.NoError(t, store.UpdateMetadata(ctx, files[0].ID, edited, true, placement{}))
	require.NoError(t, store.SaveRelease(ctx, job, ReleaseReport{State: "ready", InputHash: "stale", Candidates: []ReleaseCandidate{}}))
	report, err := store.ReleaseReport(ctx, batch)
	require.NoError(t, err)
	require.Equal(t, "queued", report.State, "an old worker lease cannot overwrite an edit")
	require.True(t, svc.lookupNextRelease(ctx))
	report, err = svc.GetReleaseReport(review, batch)
	require.NoError(t, err)
	require.Equal(t, "ready", report.State)
	require.True(t, report.Candidates[0].Complete)
	_, err = svc.SearchReleases(review, batch, musicbrainz.Query{Audio: true})
	require.ErrorContains(t, err, "audio_disabled")
	identifier := &testAudioIdentifier{}
	svc.SetAudioIdentifier(identifier)
	provider.release.Tracks[0].RecordingID, provider.release.Tracks[1].RecordingID = uuid.NewString(), uuid.NewString()
	svc.encodedFingerprint = func(_ context.Context, filename string) (string, error) {
		if strings.Contains(filename, reserved[0].FileID.String()) {
			identifier.id = provider.release.Tracks[0].RecordingID
		} else {
			identifier.id = provider.release.Tracks[1].RecordingID
		}
		return "encoded", nil
	}
	_, err = svc.SearchReleases(review, batch, musicbrainz.Query{Audio: true})
	require.NoError(t, err)
	require.True(t, svc.lookupNextRelease(ctx))
	report, err = svc.GetReleaseReport(review, batch)
	require.NoError(t, err)
	require.True(t, report.AudioAvailable)
	require.Len(t, report.AudioResults, 2)
	require.Equal(t, "acoustid", report.Candidates[0].Matches[0].Method)
	require.True(t, report.Candidates[0].Complete)
	before, err := store.AllInBatch(ctx, batch)
	require.NoError(t, err)
	require.Equal(t, "SONG 1", before[0].Meta.Title)
	// Looking up the release never changes tags or cover.
	require.Equal(t, oldCover, *before[0].CoverPath)
	used, _, err := store.Usage(ctx, author)
	require.NoError(t, err)
	applied, err := svc.ApplyRelease(review, batch, provider.release.ID, true, false)
	require.NoError(t, err)
	require.Equal(t, provider.release.ID, *applied.SelectedRelease)
	persisted, err := store.ReleaseReport(ctx, batch)
	require.NoError(t, err)
	require.Len(t, persisted.AudioResults, 2, "metadata update trigger must not erase confirmed recognition")
	after, err := store.AllInBatch(ctx, batch)
	require.NoError(t, err)
	require.Equal(t, "Song 1", after[0].Meta.Title)
	require.Equal(t, oldCover, *after[0].CoverPath)
	require.Equal(t, StatusPendingReview, after[0].Status)
	require.Equal(t, provider.release.ID, after[0].Tags["musicbrainz_albumid"])
	require.NotNil(t, after[0].TargetRelPath)
	require.Contains(t, *after[0].TargetRelPath, "01 - Song 1.flac")
	newUsed, _, err := store.Usage(ctx, author)
	require.NoError(t, err)
	require.Equal(t, used, newUsed)
	_, err = svc.ApplyRelease(review, batch, provider.release.ID, false, true)
	require.NoError(t, err)
	after, err = store.AllInBatch(ctx, batch)
	require.NoError(t, err)
	require.NotEqual(t, oldCover, *after[0].CoverPath)
	// A queued manual lookup makes the old candidate inapplicable immediately.
	_, err = svc.SearchReleases(review, batch, musicbrainz.Query{})
	require.NoError(t, err)
	_, err = svc.ApplyRelease(review, batch, provider.release.ID, true, false)
	require.ErrorContains(t, err, "release_stale")
	provider.err = errors.New("provider offline")
	require.True(t, svc.lookupNextRelease(ctx))
	report, err = store.ReleaseReport(ctx, batch)
	require.NoError(t, err)
	require.Equal(t, "error", report.State)
	_, err = store.ClaimRelease(ctx)
	require.ErrorIs(t, err, ErrNotFound, "failures back off instead of blocking upload processing")
	_, err = svc.GetReleaseReport(ctx, batch)
	require.Error(t, err, "review permission is mandatory")
	key := "integration:" + uuid.NewString()
	require.NoError(t, store.PutMetadataCache(ctx, key, []byte("cached"), time.Hour))
	data, ok, err := store.GetMetadataCache(ctx, key)
	require.NoError(t, err)
	require.True(t, ok)
	require.Equal(t, "cached", string(data))
	require.NoError(t, store.PutMetadataCache(ctx, key, data, -time.Second))
	require.NoError(t, store.ExpireMetadataCache(ctx))
	_, ok, err = store.GetMetadataCache(ctx, key)
	require.NoError(t, err)
	require.False(t, ok)
}