package testkit

import (
	"context"
	"errors"
	"github.com/stretchr/testify/require"
	"testing"
	"time"

	"galaxy/authsession/internal/domain/common"
	"galaxy/authsession/internal/domain/devicesession"
	"galaxy/authsession/internal/ports"
)

func TestInMemorySessionStoreCreateAndGet(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}
	record := activeSessionFixture("device-session-1", "user-1", time.Unix(10, 0).UTC())

	if err := store.Create(context.Background(), record); err != nil {
		require.Failf(t, "test failed", "Create() returned error: %v", err)
	}

	got, err := store.Get(context.Background(), record.ID)
	if err != nil {
		require.Failf(t, "test failed", "Get() returned error: %v", err)
	}
	if got.ID != record.ID {
		require.Failf(t, "test failed", "Get().ID = %q, want %q", got.ID, record.ID)
	}
}

func TestInMemorySessionStoreListByUserIDNewestFirst(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}
	older := activeSessionFixture("device-session-1", "user-1", time.Unix(10, 0).UTC())
	newer := activeSessionFixture("device-session-2", "user-1", time.Unix(20, 0).UTC())
	otherUser := activeSessionFixture("device-session-3", "user-2", time.Unix(30, 0).UTC())

	for _, record := range []devicesession.Session{older, newer, otherUser} {
		if err := store.Create(context.Background(), record); err != nil {
			require.Failf(t, "test failed", "Create() returned error: %v", err)
		}
	}

	got, err := store.ListByUserID(context.Background(), common.UserID("user-1"))
	if err != nil {
		require.Failf(t, "test failed", "ListByUserID() returned error: %v", err)
	}
	if len(got) != 2 {
		require.Failf(t, "test failed", "ListByUserID() length = %d, want 2", len(got))
	}
	if got[0].ID != newer.ID || got[1].ID != older.ID {
		require.Failf(t, "test failed", "ListByUserID() order = [%q %q], want [%q %q]", got[0].ID, got[1].ID, newer.ID, older.ID)
	}
}

func TestInMemorySessionStoreCountActiveByUserID(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}
	active := activeSessionFixture("device-session-1", "user-1", time.Unix(10, 0).UTC())
	revoked := revokedSessionFixture("device-session-2", "user-1", time.Unix(20, 0).UTC())

	for _, record := range []devicesession.Session{active, revoked} {
		if err := store.Create(context.Background(), record); err != nil {
			require.Failf(t, "test failed", "Create() returned error: %v", err)
		}
	}

	got, err := store.CountActiveByUserID(context.Background(), common.UserID("user-1"))
	if err != nil {
		require.Failf(t, "test failed", "CountActiveByUserID() returned error: %v", err)
	}
	if got != 1 {
		require.Failf(t, "test failed", "CountActiveByUserID() = %d, want 1", got)
	}
}

func TestInMemorySessionStoreRevokeIsIdempotent(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}
	record := activeSessionFixture("device-session-1", "user-1", time.Unix(10, 0).UTC())
	if err := store.Create(context.Background(), record); err != nil {
		require.Failf(t, "test failed", "Create() returned error: %v", err)
	}

	input := ports.RevokeSessionInput{
		DeviceSessionID: record.ID,
		Revocation: devicesession.Revocation{
			At:         time.Unix(30, 0).UTC(),
			ReasonCode: devicesession.RevokeReasonLogoutAll,
			ActorType:  common.RevokeActorType("system"),
		},
	}

	first, err := store.Revoke(context.Background(), input)
	if err != nil {
		require.Failf(t, "test failed", "first Revoke() returned error: %v", err)
	}
	if first.Outcome != ports.RevokeSessionOutcomeRevoked {
		require.Failf(t, "test failed", "first Revoke() outcome = %q, want %q", first.Outcome, ports.RevokeSessionOutcomeRevoked)
	}

	second, err := store.Revoke(context.Background(), input)
	if err != nil {
		require.Failf(t, "test failed", "second Revoke() returned error: %v", err)
	}
	if second.Outcome != ports.RevokeSessionOutcomeAlreadyRevoked {
		require.Failf(t, "test failed", "second Revoke() outcome = %q, want %q", second.Outcome, ports.RevokeSessionOutcomeAlreadyRevoked)
	}
}

func TestInMemorySessionStoreRevokeAllNoActiveSessions(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}
	record := revokedSessionFixture("device-session-1", "user-1", time.Unix(10, 0).UTC())
	if err := store.Create(context.Background(), record); err != nil {
		require.Failf(t, "test failed", "Create() returned error: %v", err)
	}

	input := ports.RevokeUserSessionsInput{
		UserID: common.UserID("user-1"),
		Revocation: devicesession.Revocation{
			At:         time.Unix(40, 0).UTC(),
			ReasonCode: devicesession.RevokeReasonAdminRevoke,
			ActorType:  common.RevokeActorType("admin"),
		},
	}

	result, err := store.RevokeAllByUserID(context.Background(), input)
	if err != nil {
		require.Failf(t, "test failed", "RevokeAllByUserID() returned error: %v", err)
	}
	if result.Outcome != ports.RevokeUserSessionsOutcomeNoActiveSessions {
		require.Failf(t, "test failed", "RevokeAllByUserID() outcome = %q, want %q", result.Outcome, ports.RevokeUserSessionsOutcomeNoActiveSessions)
	}
	if len(result.Sessions) != 0 {
		require.Failf(t, "test failed", "RevokeAllByUserID() session count = %d, want 0", len(result.Sessions))
	}
}

func TestInMemorySessionStoreGetNotFound(t *testing.T) {
	t.Parallel()

	store := &InMemorySessionStore{}

	_, err := store.Get(context.Background(), common.DeviceSessionID("missing"))
	if !errors.Is(err, ports.ErrNotFound) {
		require.Failf(t, "test failed", "Get() error = %v, want ErrNotFound", err)
	}
}

func activeSessionFixture(deviceSessionID string, userID string, createdAt time.Time) devicesession.Session {
	key, err := common.NewClientPublicKey(make([]byte, 32))
	if err != nil {
		panic(err)
	}

	return devicesession.Session{
		ID:              common.DeviceSessionID(deviceSessionID),
		UserID:          common.UserID(userID),
		ClientPublicKey: key,
		Status:          devicesession.StatusActive,
		CreatedAt:       createdAt,
	}
}

func revokedSessionFixture(deviceSessionID string, userID string, createdAt time.Time) devicesession.Session {
	record := activeSessionFixture(deviceSessionID, userID, createdAt)
	record.Status = devicesession.StatusRevoked
	record.Revocation = &devicesession.Revocation{
		At:         createdAt.Add(time.Minute),
		ReasonCode: devicesession.RevokeReasonDeviceLogout,
		ActorType:  common.RevokeActorType("user"),
	}
	return record
}