package selfservice

import (
	"context"
	"errors"
	"testing"
	"time"

	"galaxy/user/internal/domain/account"
	"galaxy/user/internal/domain/common"
	"galaxy/user/internal/domain/entitlement"
	"galaxy/user/internal/ports"

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

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

	now := time.Unix(1_775_240_500, 0).UTC()
	accountStore := newFakeAccountStore(validUserAccount())
	publisher := &recordingSelfServicePublisher{}

	service, err := NewProfileUpdaterWithObservability(
		accountStore,
		&fakeEntitlementSnapshotStore{
			byUserID: map[common.UserID]entitlement.CurrentSnapshot{
				common.UserID("user-123"): validEntitlementSnapshot(common.UserID("user-123"), now),
			},
		},
		fakeSanctionStore{},
		fakeLimitStore{},
		fixedClock{now: now},
		nil,
		nil,
		publisher,
	)
	require.NoError(t, err)

	result, err := service.Execute(context.Background(), UpdateMyProfileInput{
		UserID:      "user-123",
		DisplayName: "NovaPrime",
	})
	require.NoError(t, err)
	require.Equal(t, "NovaPrime", result.Account.DisplayName)
	require.Len(t, publisher.profileEvents, 1)
	require.Equal(t, ports.ProfileChangedOperationUpdated, publisher.profileEvents[0].Operation)
	require.Equal(t, common.Source("gateway_self_service"), publisher.profileEvents[0].Source)
	require.Equal(t, common.DisplayName("NovaPrime"), publisher.profileEvents[0].DisplayName)
	require.Equal(t, common.UserName("player-abcdefgh"), publisher.profileEvents[0].UserName)
}

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

	now := time.Unix(1_775_240_500, 0).UTC()
	accountStore := newFakeAccountStore(validUserAccount())
	publisher := &recordingSelfServicePublisher{profileErr: errors.New("publisher unavailable")}

	service, err := NewProfileUpdaterWithObservability(
		accountStore,
		&fakeEntitlementSnapshotStore{
			byUserID: map[common.UserID]entitlement.CurrentSnapshot{
				common.UserID("user-123"): validEntitlementSnapshot(common.UserID("user-123"), now),
			},
		},
		fakeSanctionStore{},
		fakeLimitStore{},
		fixedClock{now: now},
		nil,
		nil,
		publisher,
	)
	require.NoError(t, err)

	result, err := service.Execute(context.Background(), UpdateMyProfileInput{
		UserID:      "user-123",
		DisplayName: "NovaPrime",
	})
	require.NoError(t, err)
	require.Equal(t, "NovaPrime", result.Account.DisplayName)
	require.Len(t, publisher.profileEvents, 1)

	storedAccount, err := accountStore.GetByUserID(context.Background(), common.UserID("user-123"))
	require.NoError(t, err)
	require.Equal(t, common.DisplayName("NovaPrime"), storedAccount.DisplayName)
}

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

	now := time.Unix(1_775_240_500, 0).UTC()
	accountStore := newFakeAccountStore(account.UserAccount{
		UserID:            common.UserID("user-123"),
		Email:             common.Email("pilot@example.com"),
		UserName:          common.UserName("player-abcdefgh"),
		PreferredLanguage: common.LanguageTag("en-US"),
		TimeZone:          common.TimeZoneName("UTC"),
		DeclaredCountry:   common.CountryCode("DE"),
		CreatedAt:         time.Unix(1_775_240_000, 0).UTC(),
		UpdatedAt:         time.Unix(1_775_240_100, 0).UTC(),
	})
	publisher := &recordingSelfServicePublisher{}

	service, err := NewSettingsUpdaterWithObservability(
		accountStore,
		&fakeEntitlementSnapshotStore{
			byUserID: map[common.UserID]entitlement.CurrentSnapshot{
				common.UserID("user-123"): validEntitlementSnapshot(common.UserID("user-123"), now),
			},
		},
		fakeSanctionStore{},
		fakeLimitStore{},
		fixedClock{now: now},
		nil,
		nil,
		publisher,
	)
	require.NoError(t, err)

	result, err := service.Execute(context.Background(), UpdateMySettingsInput{
		UserID:            "user-123",
		PreferredLanguage: "en-us",
		TimeZone:          " UTC ",
	})
	require.NoError(t, err)
	require.Equal(t, "en-US", result.Account.PreferredLanguage)
	require.Equal(t, "UTC", result.Account.TimeZone)
	require.Empty(t, publisher.settingsEvents)
}

type recordingSelfServicePublisher struct {
	profileErr     error
	settingsErr    error
	profileEvents  []ports.ProfileChangedEvent
	settingsEvents []ports.SettingsChangedEvent
}

func (publisher *recordingSelfServicePublisher) PublishProfileChanged(_ context.Context, event ports.ProfileChangedEvent) error {
	if err := event.Validate(); err != nil {
		return err
	}
	publisher.profileEvents = append(publisher.profileEvents, event)
	return publisher.profileErr
}

func (publisher *recordingSelfServicePublisher) PublishSettingsChanged(_ context.Context, event ports.SettingsChangedEvent) error {
	if err := event.Validate(); err != nil {
		return err
	}
	publisher.settingsEvents = append(publisher.settingsEvents, event)
	return publisher.settingsErr
}

var (
	_ ports.ProfileChangedPublisher  = (*recordingSelfServicePublisher)(nil)
	_ ports.SettingsChangedPublisher = (*recordingSelfServicePublisher)(nil)
)