package app

import (
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"

	"github.com/geo-platform/tenant-api/internal/tenant/repository"
)

func TestResolveDesktopClientOnline_PresenceHitWins(t *testing.T) {
	now := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)

	online := resolveDesktopClientOnline(&repository.DesktopClient{
		ID:         uuid.New(),
		LastSeenAt: nil,
	}, true, true, now)

	assert.True(t, online)
}

func TestResolveDesktopClientOnline_FallsBackToRecentHeartbeatWhenPresenceMisses(t *testing.T) {
	now := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)
	lastSeen := now.Add(-30 * time.Second)

	online := resolveDesktopClientOnline(&repository.DesktopClient{
		ID:         uuid.New(),
		LastSeenAt: &lastSeen,
	}, false, true, now)

	assert.True(t, online)
}

func TestResolveDesktopClientOnline_StaleHeartbeatIsOffline(t *testing.T) {
	now := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)
	lastSeen := now.Add(-(desktopClientPresenceTTL + time.Second))

	online := resolveDesktopClientOnline(&repository.DesktopClient{
		ID:         uuid.New(),
		LastSeenAt: &lastSeen,
	}, false, false, now)

	assert.False(t, online)
}

func TestBuildDesktopAccountView_PrefersAccountPresenceClient(t *testing.T) {
	service := &DesktopAccountService{}
	accountID := uuid.New()
	staleClientID := uuid.New()
	activeClientID := uuid.New()
	lastSeen := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)
	deviceName := "Desktop MacIntel"

	view := service.buildDesktopAccountView(
		&repository.DesktopAccount{
			DesktopID:   accountID,
			ClientID:    &staleClientID,
			Platform:    "toutiaohao",
			PlatformUID: "platform:4181862206",
			DisplayName: "ireader",
			Health:      "live",
		},
		map[uuid.UUID]*repository.DesktopClient{
			activeClientID: {
				ID:         activeClientID,
				LastSeenAt: &lastSeen,
				DeviceName: &deviceName,
			},
		},
		map[uuid.UUID]uuid.UUID{
			accountID: activeClientID,
		},
	)

	if assert.NotNil(t, view.ClientID) {
		assert.Equal(t, activeClientID.String(), *view.ClientID)
	}
	if assert.NotNil(t, view.ClientOnline) {
		assert.True(t, *view.ClientOnline)
	}
	assert.Equal(t, "4181862206", view.PlatformUID)
	assert.Equal(t, &lastSeen, view.ClientLastSeenAt)
	assert.Equal(t, &deviceName, view.ClientDeviceName)
}

func TestBuildDesktopAccountView_FallsBackToStoredClientWhenNoPresence(t *testing.T) {
	service := &DesktopAccountService{}
	accountID := uuid.New()
	storedClientID := uuid.New()
	lastSeen := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)

	view := service.buildDesktopAccountView(
		&repository.DesktopAccount{
			DesktopID:   accountID,
			ClientID:    &storedClientID,
			Platform:    "toutiaohao",
			PlatformUID: "4181862206",
			DisplayName: "ireader",
			Health:      "live",
		},
		map[uuid.UUID]*repository.DesktopClient{
			storedClientID: {
				ID:         storedClientID,
				LastSeenAt: &lastSeen,
			},
		},
		nil,
	)

	if assert.NotNil(t, view.ClientID) {
		assert.Equal(t, storedClientID.String(), *view.ClientID)
	}
	if assert.NotNil(t, view.ClientOnline) {
		assert.False(t, *view.ClientOnline)
	}
	assert.Equal(t, &lastSeen, view.ClientLastSeenAt)
}

func TestShouldApplyDesktopAccountRuntimeHealth_IgnoresReportOlderThanVerifiedAt(t *testing.T) {
	verifiedAt := time.Date(2026, 4, 30, 9, 30, 0, 0, time.UTC)
	reportCheckedAt := verifiedAt.Add(-time.Minute)

	shouldApply := shouldApplyDesktopAccountRuntimeHealth(
		DesktopAccountView{
			ID:         uuid.NewString(),
			Health:     "live",
			VerifiedAt: &verifiedAt,
		},
		bufferedDesktopAccountHealthReport{
			Health:    "expired",
			AuthState: "expired",
			CheckedAt: reportCheckedAt,
		},
	)

	assert.False(t, shouldApply)
}

func TestShouldApplyDesktopAccountRuntimeHealth_AppliesReportAfterVerifiedAt(t *testing.T) {
	verifiedAt := time.Date(2026, 4, 30, 9, 30, 0, 0, time.UTC)
	reportCheckedAt := verifiedAt.Add(time.Minute)

	shouldApply := shouldApplyDesktopAccountRuntimeHealth(
		DesktopAccountView{
			ID:         uuid.NewString(),
			Health:     "live",
			VerifiedAt: &verifiedAt,
		},
		bufferedDesktopAccountHealthReport{
			Health:    "expired",
			AuthState: "expired",
			CheckedAt: reportCheckedAt,
		},
	)

	assert.True(t, shouldApply)
}