package store_test

import (
	"context"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"git.d-ma.be/mathias/tapir/internal/adapters/store"
	"git.d-ma.be/mathias/tapir/internal/domain"
)

// Progress and heartbeat of an upload job (ADR-035, migration 020). Like the other
// upload store tests these run as the superuser, so the cross-user cases prove the
// statement's own user_id predicate; the database-enforced isolation is covered by the
// RLS tests, and migration 020 adds columns to the already-FORCE'd table, not a table.

func startedUpload(t *testing.T, s *store.Store) string {
	t.Helper()
	seedUsers(t, userA, userB)
	id, err := s.CreateUpload(context.Background(), userA, "m", false)
	require.NoError(t, err)
	return id
}

func TestUploadProgress_AFreshUploadHasNoProgressAndNoHeartbeat(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)

	got, err := s.GetUpload(context.Background(), userA, id)

	require.NoError(t, err)
	assert.Empty(t, got.Progress)
	assert.True(t, got.ProgressAt.IsZero())
	assert.True(t, got.AliveAt.IsZero())
}

func TestUploadProgress_StepsAndTheirTimesRoundTripInOrder(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()
	at := time.Date(2026, 10, 2, 8, 30, 0, 0, time.UTC)
	steps := []domain.ProgressStep{
		{Key: "audio", Label: "Preparing audio", State: domain.StepDone, StartedAt: at, FinishedAt: at.Add(40 * time.Second)},
		{Key: "decide", Label: "Deciding", State: domain.StepRunning, StartedAt: at.Add(time.Minute), Done: 12, Total: 282},
		{Key: "save", Label: "Saving", State: domain.StepPending},
	}

	require.NoError(t, s.SaveProgress(ctx, userA, id, steps, at.Add(2*time.Minute)))

	got, err := s.GetUpload(ctx, userA, id)
	require.NoError(t, err)
	require.Len(t, got.Progress, 3)
	assert.Equal(t, []string{"audio", "decide", "save"}, []string{got.Progress[0].Key, got.Progress[1].Key, got.Progress[2].Key})
	assert.Equal(t, domain.StepRunning, got.Progress[1].State)
	assert.Equal(t, 12, got.Progress[1].Done)
	assert.Equal(t, 282, got.Progress[1].Total)
	assert.True(t, got.Progress[0].FinishedAt.Equal(at.Add(40*time.Second)), "a step's finish time must survive the round trip")
	assert.True(t, got.Progress[2].StartedAt.IsZero(), "a pending step has no start time, not a zero date")
	assert.True(t, got.ProgressAt.Equal(at.Add(2*time.Minute)))
}

func TestUploadProgress_AHeartbeatMovesAliveAtAndNotProgressAt(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()
	at := time.Date(2026, 10, 2, 8, 30, 0, 0, time.UTC)
	require.NoError(t, s.SaveProgress(ctx, userA, id, []domain.ProgressStep{{Key: "audio", Label: "a", State: domain.StepRunning}}, at))
	beatAt := at.Add(90 * time.Second) // deliberately not the database's NOW()

	require.NoError(t, s.Heartbeat(ctx, userA, id, beatAt))

	got, err := s.GetUpload(ctx, userA, id)
	require.NoError(t, err)
	assert.True(t, got.AliveAt.Equal(beatAt), "the heartbeat is stamped with the application's clock, the same one progress_at uses, not the database's NOW() (#51)")
	assert.True(t, got.ProgressAt.Equal(at), "alive is not progress: a heartbeat must not move progress_at")
}

func TestUploadProgress_ASecondSaveReplacesTheFirst(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()
	at := time.Date(2026, 10, 2, 8, 30, 0, 0, time.UTC)
	require.NoError(t, s.SaveProgress(ctx, userA, id, []domain.ProgressStep{{Key: "a", Label: "A", State: domain.StepRunning}}, at))

	require.NoError(t, s.SaveProgress(ctx, userA, id, []domain.ProgressStep{{Key: "a", Label: "A", State: domain.StepDone}, {Key: "b", Label: "B", State: domain.StepRunning}}, at.Add(time.Minute)))

	got, err := s.GetUpload(ctx, userA, id)
	require.NoError(t, err)
	require.Len(t, got.Progress, 2)
	assert.Equal(t, domain.StepDone, got.Progress[0].State)
}

func TestUploadProgress_ByAnotherUserChangesNothing(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()

	errSave := s.SaveProgress(ctx, userB, id, []domain.ProgressStep{{Key: "x", Label: "X", State: domain.StepDone}}, time.Now())
	errBeat := s.Heartbeat(ctx, userB, id, time.Now())

	assert.ErrorIs(t, errSave, store.ErrUploadNotFound)
	assert.ErrorIs(t, errBeat, store.ErrUploadNotFound)
	got, err := s.GetUpload(ctx, userA, id)
	require.NoError(t, err)
	assert.Empty(t, got.Progress, "B's write must not have reached A's upload")
	assert.True(t, got.AliveAt.IsZero())
}

func TestUploadProgress_ListDoesNotDragItAlong(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()
	require.NoError(t, s.SaveProgress(ctx, userA, id, []domain.ProgressStep{{Key: "a", Label: "A", State: domain.StepRunning}}, time.Now()))

	rows, err := s.ListUploads(ctx, userA)

	require.NoError(t, err)
	require.Len(t, rows, 1)
	assert.Empty(t, rows[0].Progress, "the list view needs a status, not every row's phases")
}

func TestUploadProgress_SurvivesCompletion(t *testing.T) {
	s := newStore(t)
	id := startedUpload(t, s)
	ctx := context.Background()
	require.NoError(t, s.StartTranscribing(ctx, userA, id))
	require.NoError(t, s.SaveProgress(ctx, userA, id, []domain.ProgressStep{{Key: "a", Label: "A", State: domain.StepDone}}, time.Now()))

	require.NoError(t, s.CompleteUpload(ctx, userA, id, domain.Transcription{Text: "x", Endpoint: "e"}))

	got, err := s.GetUpload(ctx, userA, id)
	require.NoError(t, err)
	require.Len(t, got.Progress, 1, "a finished upload keeps its record of what was done, and how long each step took")
}