package main

import (
	"bookhoard/internal/database"
	"bookhoard/internal/sync"
	"context"
	"testing"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// setupSyncTestDB creates a database connection for sync integration tests
func setupSyncTestDB(t *testing.T) *database.Queries {
	ctx := context.Background()

	dbURL := "postgresql://postgres:postgres@db:5432/bookhoard?sslmode=disable"
	dbPool, err := pgxpool.New(ctx, dbURL)
	require.NoError(t, err, "Failed to connect to test database")

	db := database.New(dbPool)

	t.Cleanup(func() {
		_, _ = dbPool.Exec(ctx, "DELETE FROM sync_queue WHERE true")
		_, _ = dbPool.Exec(ctx, "DELETE FROM reading_progress WHERE true")
		_, _ = dbPool.Exec(ctx, "DELETE FROM media_items WHERE title LIKE 'Test %'")
		_, _ = dbPool.Exec(ctx, "DELETE FROM libraries WHERE name LIKE 'Test %'")
		_, _ = dbPool.Exec(ctx, "DELETE FROM devices WHERE device_name LIKE 'Test %'")
		_, _ = dbPool.Exec(ctx, "DELETE FROM users WHERE email LIKE 'test%'")
		dbPool.Close()
	})

	return db
}

func createSyncTestUser(t *testing.T, db *database.Queries) pgtype.UUID {
	ctx := context.Background()

	userID := uuid.New()
	hashedPassword := "$2a$10$rKvZ.HZx3lLJ6IQCpH1lOukQ/xU8j5cH8mYhPY5YGfXllq5hG8y0Ou"

	_, err := db.CreateUser(ctx, database.CreateUserParams{
		Email:        "test-sync@example.com",
		Username:     "testsyncuser",
		PasswordHash: hashedPassword,
		FirstName:    pgtype.Text{String: "Test", Valid: true},
		LastName:     pgtype.Text{String: "Sync", Valid: true},
		Role:         "user",
	})
	require.NoError(t, err)
	return pgtype.UUID{Bytes: userID, Valid: true}
}

func createSyncTestDevice(t *testing.T, db *database.Queries, userID pgtype.UUID) pgtype.UUID {
	ctx := context.Background()

	deviceID := uuid.New()
	authToken := "test-sync-token-" + deviceID.String()

	_, err := db.CreateDevice(ctx, database.CreateDeviceParams{
		UserID:           userID,
		DeviceName:       "Test Sync Device",
		DeviceType:       "koreader",
		DeviceIdentifier: deviceID.String(),
		AuthToken:        authToken,
		SyncEnabled:      pgtype.Bool{Bool: true, Valid: true},
	})
	require.NoError(t, err)
	return pgtype.UUID{Bytes: deviceID, Valid: true}
}

func TestSyncIntegration_OfflineDetector_DeviceStatusDetection(t *testing.T) {
	ctx := context.Background()
	db := setupSyncTestDB(t)

	userID := createSyncTestUser(t, db)
	deviceID := createSyncTestDevice(t, db, userID)

	detector := sync.NewOfflineDetector(db, nil)

	status, err := detector.GetDeviceStatus(ctx, deviceID)
	require.NoError(t, err)
	assert.True(t, status.IsOnline, "device should be online initially")
	assert.Equal(t, "Test Sync Device", status.DeviceName)
	assert.Equal(t, "koreader", status.DeviceType)
}

func TestSyncIntegration_OfflineDetector_OfflineThreshold(t *testing.T) {
	ctx := context.Background()
	db := setupSyncTestDB(t)

	userID := createSyncTestUser(t, db)
	deviceID := createSyncTestDevice(t, db, userID)

	_, err := db.UpdateDeviceLastSeen(ctx, deviceID)
	require.NoError(t, err)

	detector := sync.NewOfflineDetector(db, nil)

	// Get device status
	status, err := detector.GetDeviceStatus(ctx, deviceID)
	require.NoError(t, err)
	assert.True(t, status.IsOnline, "device should be online initially")
}

func TestSyncIntegration_OfflineDetector_GetDeviceStatus(t *testing.T) {
	ctx := context.Background()
	db := setupSyncTestDB(t)

	userID := createSyncTestUser(t, db)
	deviceID := createSyncTestDevice(t, db, userID)

	detector := sync.NewOfflineDetector(db, nil)

	status, err := detector.GetDeviceStatus(ctx, deviceID)
	require.NoError(t, err)
	assert.NotNil(t, status)
	assert.Equal(t, "Test Sync Device", status.DeviceName)
	assert.Equal(t, "koreader", status.DeviceType)
}

func TestSyncIntegration_OfflineDetector_ForceReconnectDevice(t *testing.T) {
	ctx := context.Background()
	db := setupSyncTestDB(t)

	userID := createSyncTestUser(t, db)
	deviceID := createSyncTestDevice(t, db, userID)

	_, err := db.UpdateDeviceLastSeen(ctx, deviceID)
	require.NoError(t, err)

	detector := sync.NewOfflineDetector(db, nil)

	err = detector.ForceReconnectDevice(ctx, deviceID)
	require.NoError(t, err)

	device, err := db.GetDevice(ctx, deviceID)
	require.NoError(t, err)
	assert.True(t, device.SyncEnabled.Bool, "device should be re-enabled after force reconnect")
}

func TestSyncIntegration_QueueProcessor_EnqueueProgress(t *testing.T) {
	ctx := context.Background()
	db := setupSyncTestDB(t)

	processor := sync.NewSyncQueueProcessor(db)

	userID := pgtype.UUID{Bytes: uuid.New(), Valid: true}
	deviceID := pgtype.UUID{Bytes: uuid.New(), Valid: true}
	mediaItemID := pgtype.UUID{Bytes: uuid.New(), Valid: true}

	percentage := 0.45
	chapter := 3
	update := &sync.ProgressUpdate{
		DeviceID:    deviceID,
		MediaItemID: mediaItemID,
		UserID:      userID,
		Percentage:  percentage,
		Chapter:     &chapter,
		Source:      "koreader",
		SyncMode:    "immediate",
	}

	err := processor.EnqueueProgress(update)
	require.NoError(t, err, "should enqueue progress update")

	items, err := db.ListPendingSyncQueueItems(ctx, database.ListPendingSyncQueueItemsParams{
		DeviceID: deviceID,
		Limit:    10,
	})
	require.NoError(t, err)
	assert.Len(t, items, 1, "should have one queue item")

	item := items[0]
	assert.Equal(t, "progress", item.SyncType)
	assert.Equal(t, sync.SyncStatusPending, item.Status.String)
	assert.Equal(t, int32(sync.PriorityPageTurn), item.Priority.Int32)
}