//go:build integration
// +build integration

package refreshtokens_test

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

	"git.sendico.io/tech/sxchnge/bff/pkg/merrors"
	"git.sendico.io/tech/sxchnge/bff/pkg/model"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.mongodb.org/mongo-driver/v2/bson"
)

func TestRefreshTokenDB_ClientManagement(t *testing.T) {
	db, cleanup := setupTestDB(t)
	defer cleanup()

	ctx := context.Background()

	t.Run("Client_CRUD_Operations", func(t *testing.T) {
		// Note: Client management is handled by a separate client database.
		// This test verifies that refresh tokens work with different client IDs.
		userID := bson.NewObjectID()

		webToken := createTestRefreshToken(userID, "web-app", "device1", "token1")
		err := db.Create(ctx, webToken)
		require.NoError(t, err)

		mobileToken := createTestRefreshToken(userID, "mobile-app", "device2", "token2")
		err = db.Create(ctx, mobileToken)
		require.NoError(t, err)

		webCRT := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: "web-app",
				DeviceID: "device1",
			},
			RefreshToken: "token1",
		}

		retrievedToken, err := db.GetByCRT(ctx, webCRT)
		require.NoError(t, err)
		assert.Equal(t, "web-app", retrievedToken.ClientID)
		assert.Equal(t, "device1", retrievedToken.DeviceID)

		mobileCRT := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: "mobile-app",
				DeviceID: "device2",
			},
			RefreshToken: "token2",
		}

		retrievedToken, err = db.GetByCRT(ctx, mobileCRT)
		require.NoError(t, err)
		assert.Equal(t, "mobile-app", retrievedToken.ClientID)
		assert.Equal(t, "device2", retrievedToken.DeviceID)
	})
}

func TestRefreshTokenDB_SecurityScenarios(t *testing.T) {
	db, cleanup := setupTestDB(t)
	defer cleanup()

	ctx := context.Background()

	t.Run("Token_Hijacking_Prevention", func(t *testing.T) {
		userID := bson.NewObjectID()
		clientID := "web-app"
		deviceID := "user-browser"
		token := "hijacked_token_123"

		refreshToken := createTestRefreshToken(userID, clientID, deviceID, token)
		err := db.Create(ctx, refreshToken)
		require.NoError(t, err)

		session := &model.SessionIdentifier{
			ClientID: clientID,
			DeviceID: deviceID,
		}
		err = db.Revoke(ctx, userID, session)
		require.NoError(t, err)

		crt := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: clientID,
				DeviceID: deviceID,
			},
			RefreshToken: token,
		}

		_, err = db.GetByCRT(ctx, crt)
		assert.Error(t, err)
		assert.True(t, errors.Is(err, merrors.ErrNoData))
	})

	t.Run("Invalid_Token_Attempts", func(t *testing.T) {
		crt := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: "invalid-client",
				DeviceID: "invalid-device",
			},
			RefreshToken: "invalid_token_123",
		}

		_, err := db.GetByCRT(ctx, crt)
		assert.Error(t, err)
		assert.True(t, errors.Is(err, merrors.ErrNoData))
	})
}

func TestRefreshTokenDB_ExpiredTokenHandling(t *testing.T) {
	db, cleanup := setupTestDB(t)
	defer cleanup()

	ctx := context.Background()

	t.Run("Expired_Token_Cleanup", func(t *testing.T) {
		userID := bson.NewObjectID()
		clientID := "web-app"
		deviceID := "user-device"
		token := "expired_token_123"

		refreshToken := createTestRefreshToken(userID, clientID, deviceID, token)
		refreshToken.ExpiresAt = time.Now().Add(-1 * time.Hour)
		err := db.Create(ctx, refreshToken)
		require.NoError(t, err)

		var storedToken model.RefreshToken
		err = db.Get(ctx, *refreshToken.GetID(), &storedToken)
		require.NoError(t, err)
		assert.True(t, storedToken.ExpiresAt.Before(time.Now()))

		crt := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: clientID,
				DeviceID: deviceID,
			},
			RefreshToken: token,
		}

		_, err = db.GetByCRT(ctx, crt)
		assert.Error(t, err)
		assert.True(t, errors.Is(err, merrors.ErrAccessDenied))
	})
}

func TestRefreshTokenDB_ConcurrentAccess(t *testing.T) {
	db, cleanup := setupTestDB(t)
	defer cleanup()

	ctx := context.Background()

	t.Run("Concurrent_Token_Usage", func(t *testing.T) {
		userID := bson.NewObjectID()
		clientID := "web-app"
		deviceID := "user-device"
		token := "concurrent_token_123"

		refreshToken := createTestRefreshToken(userID, clientID, deviceID, token)
		err := db.Create(ctx, refreshToken)
		require.NoError(t, err)

		crt := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: clientID,
				DeviceID: deviceID,
			},
			RefreshToken: token,
		}

		done := make(chan error, 2)

		go func() {
			_, err := db.GetByCRT(ctx, crt)
			done <- err
		}()

		go func() {
			_, err := db.GetByCRT(ctx, crt)
			done <- err
		}()

		for i := 0; i < 2; i++ {
			err := <-done
			require.NoError(t, err)
		}
	})
}

func TestRefreshTokenDB_EdgeCases(t *testing.T) {
	db, cleanup := setupTestDB(t)
	defer cleanup()

	ctx := context.Background()

	t.Run("Delete_Token_By_ID", func(t *testing.T) {
		userID := bson.NewObjectID()
		refreshToken := createTestRefreshToken(userID, "web-app", "device-1", "token_123")
		err := db.Create(ctx, refreshToken)
		require.NoError(t, err)

		tokenID := *refreshToken.GetID()

		err = db.Delete(ctx, tokenID)
		require.NoError(t, err)

		var result model.RefreshToken
		err = db.Get(ctx, tokenID, &result)
		assert.Error(t, err)
		assert.True(t, errors.Is(err, merrors.ErrNoData))
	})

	t.Run("Revoke_Non_Existent_Token", func(t *testing.T) {
		userID := bson.NewObjectID()
		session := &model.SessionIdentifier{
			ClientID: "non-existent-client",
			DeviceID: "non-existent-device",
		}

		err := db.Revoke(ctx, userID, session)
		assert.NoError(t, err)
	})

	t.Run("RevokeAll_No_Other_Devices", func(t *testing.T) {
		userID := bson.NewObjectID()
		clientID := "web-app"
		deviceID := "only-device"

		refreshToken := createTestRefreshToken(userID, clientID, deviceID, "token_123")
		err := db.Create(ctx, refreshToken)
		require.NoError(t, err)

		err = db.RevokeAll(ctx, userID, deviceID)
		require.NoError(t, err)

		crt := &model.ClientRefreshToken{
			SessionIdentifier: model.SessionIdentifier{
				ClientID: clientID,
				DeviceID: deviceID,
			},
			RefreshToken: "token_123",
		}

		_, err = db.GetByCRT(ctx, crt)
		require.NoError(t, err)
	})
}