package repository_test

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"math/rand"
	"net/url"
	"os"
	"path/filepath"
	"testing"
	"time"

	"git.cryptic.systems/volker.raschek/flucky/pkg/repository"
	"git.cryptic.systems/volker.raschek/flucky/pkg/testutils/dockerutils"
	"git.cryptic.systems/volker.raschek/flucky/pkg/types"
	"git.cryptic.systems/volker.raschek/go-logger"
	uuid "github.com/satori/go.uuid"
	"github.com/stretchr/testify/require"

	_ "github.com/lib/pq"
	_ "github.com/mattn/go-sqlite3"
)

func TestPostgresBackend(t *testing.T) {
	require := require.New(t)
	dockerClient, err := dockerutils.New()
	require.NoError(err)

	rand.Seed(time.Now().Unix())
	postgresHostPort := rand.Intn(10024-1024) + 1024
	postgresDBPasswort := "postgres"
	postgresContainerID, err := dockerClient.NewBuilder("postgres:13-alpine").
		Port(fmt.Sprintf("%v:5432/tcp", postgresHostPort)).
		Pull().
		AddEnv("PGTZ", "Europe/Berlin").
		AddEnv("POSTGRES_PASSWORD", postgresDBPasswort).
		AddEnv("TZ", "Europe/Berlin").
		Mount("/etc/localtime", "/etc/localtime").
		Start(context.Background())
	cleanup := func() {
		dockerClient.ContainerRemoveByIDs(context.Background(), postgresContainerID)
	}
	t.Cleanup(cleanup)
	require.NoError(err)

	time.Sleep(time.Second * 10)

	// postgres://[user]:[password]@[host]:[port]/[path]?[query]
	dsnURL, err := url.Parse(fmt.Sprintf("postgres://postgres:%v@127.0.0.1:%v?sslmode=disable", postgresDBPasswort, postgresHostPort))
	require.NoError(err)

	repo, err := repository.New(dsnURL, logger.NewLogger(logger.LogLevelDebug))
	require.NoError(err)

	testBackend(t, repo)
}

func TestSQLiteBackend(t *testing.T) {
	require := require.New(t)
	workspace := filepath.Join(os.TempDir(), uuid.NewV4().String())
	err := os.MkdirAll(workspace, 0755)
	require.NoError(err)
	t.Cleanup(func() { os.RemoveAll(workspace) })

	dsnURL, err := url.Parse(fmt.Sprintf("sqlite3://%v/test.db", workspace))
	require.NoError(err)

	repo, err := repository.New(dsnURL, logger.NewLogger(logger.LogLevelDebug))
	require.NoError(err)

	testBackend(t, repo)
}

func testBackend(t *testing.T, repo *repository.Repository) {
	require := require.New(t)
	location := uuid.NewV4().String()
	expectedDevices := []*types.Device{
		{
			ID:           "39b8f150-8abf-4539-9f16-7f68cedb1649",
			Name:         "62e3978f-2198-4aa9-9d6f-cdc91a468b00",
			Location:     &location,
			CreationDate: *timeNow(require),
		},
		{
			ID:           "ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f",
			Name:         "f2b245eb-b15f-40e1-9212-9a645907b710",
			Location:     &location,
			CreationDate: *timeNow(require),
		},
	}

	// Test: AddDevice
	err := repo.AddDevices(expectedDevices...)
	require.NoError(err)

	// Test: GetDevices
	devices, err := repo.GetDevices()
	require.NoError(err)
	require.Len(devices, len(expectedDevices))
	require.JSONEq(jsonEncoder(expectedDevices), jsonEncoder(devices))

	// Test: GetDevice
	device, err := repo.GetDevice(expectedDevices[0].ID)
	require.NoError(err)
	require.JSONEq(jsonEncoder(expectedDevices[0]), jsonEncoder(device))

	// Test: RemoveDevice
	err = repo.RemoveDevices(expectedDevices[0].ID)
	require.NoError(err)

	devices, err = repo.GetDevices()
	require.NoError(err)
	require.Len(devices, 1)

	device, err = repo.GetDevice(expectedDevices[0].ID)
	require.NoError(err)
	require.Nil(device)

	err = repo.AddDevices(expectedDevices[0])
	require.NoError(err)

	// Test: Update Devices
	location = "MyLocation"
	expectedDevice := &types.Device{
		ID:           "ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f",
		Name:         "Hello World",
		Location:     &location,
		CreationDate: *timeNow(require),
	}

	err = repo.UpdateDevices(expectedDevice)
	require.NoError(err)

	device, err = repo.GetDevice(expectedDevice.ID)
	require.NoError(err)
	// require.JSONEq(jsonEncoder(expectedDevice), jsonEncoder(device))

	var (
		wireID                = "50473fdc-f6ef-4227-b3c4-484d8e9c1323"
		i2cBus                = 1
		i2cAddress      uint8 = 76
		expectedSensors       = []*types.Sensor{
			{
				ID:           "0f8b88b0-c20d-42b2-ab51-b09ca99c0752",
				Name:         "e1fbdbe9-cebf-42ed-8065-bf4882ccf76b",
				Location:     "6d5b5450-1f87-47cb-b185-f64c35fae3c1",
				GPIONumber:   "GPIO14",
				Model:        "DHT11",
				Enabled:      true,
				TickDuration: "1m",
				DeviceID:     "ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f",
				CreationDate: *timeNow(require),
			},
			{
				ID:           "80b1c4bd-abec-4ff0-afb4-bd70aeed0c83",
				Name:         "544365ee-ece9-44ea-911d-5d920a68d4ba",
				Location:     "7ae2d05e-9e6b-4d2d-b26a-cb4acca83778",
				WireID:       &wireID,
				Model:        "DS18B20",
				Enabled:      true,
				TickDuration: "5m",
				DeviceID:     "ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f",
				CreationDate: *timeNow(require),
			},
			{
				ID:           "8c74397f-8e60-4c9d-960d-3197747cef9a",
				Name:         "4b808675-de02-4866-893d-1c77f23b9304",
				Location:     "8a085c0f-dd3c-447f-8c4e-c4c1d869c7b6",
				I2CBus:       &i2cBus,
				I2CAddress:   &i2cAddress,
				Model:        "BME280",
				Enabled:      false,
				TickDuration: "10m",
				DeviceID:     "39b8f150-8abf-4539-9f16-7f68cedb1649",
				CreationDate: *timeNow(require),
			},
		}
	)

	// Test: AddSensors
	err = repo.AddSensors(expectedSensors...)
	require.NoError(err)

	// Test: GetSensors
	sensors, err := repo.GetSensors()
	require.NoError(err)
	require.Len(sensors, len(expectedSensors))

	sensors, err = repo.GetSensors("BME280")
	require.NoError(err)
	require.Len(sensors, 1)
	require.JSONEq(jsonEncoder(expectedSensors[2]), jsonEncoder(sensors[0]))

	sensors, err = repo.GetSensors("DS18B20")
	require.NoError(err)
	require.Len(sensors, 1)
	require.JSONEq(jsonEncoder(expectedSensors[1]), jsonEncoder(sensors[0]))

	sensors, err = repo.GetSensors("DHT11")
	require.NoError(err)
	require.Len(sensors, 1)
	require.JSONEq(jsonEncoder(expectedSensors[0]), jsonEncoder(sensors[0]))

	sensors, err = repo.GetSensors("DHT11", "DS18B20")
	require.NoError(err)
	require.Len(sensors, 2)
	require.ElementsMatch(expectedSensors[0:2], sensors)

	// Test: GetSensor
	sensor, err := repo.GetSensor(expectedSensors[0].ID)
	require.NoError(err)
	require.JSONEq(jsonEncoder(expectedSensors[0]), jsonEncoder(sensor))

	// Test: GetSensorsByDeviceID
	sensors, err = repo.GetSensorsByDeviceID("ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f")
	require.NoError(err)
	require.Len(sensors, 2)
	require.JSONEq(jsonEncoder(expectedSensors[0:2]), jsonEncoder(sensors))

	// Test: RemoveSensors
	err = repo.RemoveSensors(expectedSensors[0].ID)
	require.NoError(err)

	sensors, err = repo.GetSensors()
	require.NoError(err)
	require.Len(sensors, 2)

	sensors, err = repo.GetSensorsByDeviceID("ec0be3ab-d26d-4f9b-a96e-23ae5c577f8f")
	require.NoError(err)
	require.Len(sensors, 1)

	sensor, err = repo.GetSensor(expectedSensors[0].ID)
	require.NoError(err)
	require.Nil(sensor)

	// Test: RemoveSensorsByNames
	err = repo.RemoveSensorsByNames(expectedSensors[1].Name)
	require.NoError(err)

	sensors, err = repo.GetSensors()
	require.NoError(err)
	require.Len(sensors, 1)

	sensor, err = repo.GetSensor(expectedSensors[1].ID)
	require.NoError(err)
	require.Nil(sensor)

	// Test: RenameSensor
	err = repo.RenameSensors(expectedSensors[2].Name, "Hello")
	require.NoError(err)

	sensor, err = repo.GetSensor(expectedSensors[2].ID)
	require.Equal("Hello", sensor.Name)
	require.NotNil(sensor)

	// Test: DisableSensorsByNames
	err = repo.DisableSensorsByNames("Hello")
	require.NoError(err)

	sensor, err = repo.GetSensor(expectedSensors[2].ID)
	require.False(sensor.Enabled)
	require.NotNil(sensor)

	// Test: EnableSensorsByName
	err = repo.EnableSensorsByNames("Hello")
	require.NoError(err)

	sensor, err = repo.GetSensor(expectedSensors[2].ID)
	require.True(sensor.Enabled)
	require.NotNil(sensor)

	// Test: UpdateSensors
	expectedSensor := &types.Sensor{
		ID:           "8c74397f-8e60-4c9d-960d-3197747cef9a",
		Name:         "4b808675-de02-4866-893d-1c77f23b9304",
		Location:     "Über den Wolken muss die Freiheit wohl grenzenlos sein...",
		I2CBus:       nil,
		I2CAddress:   nil,
		Model:        "SDS011",
		Enabled:      true,
		TickDuration: "6h",
		DeviceID:     "39b8f150-8abf-4539-9f16-7f68cedb1649",
		CreationDate: *timeNow(require),
	}

	err = repo.UpdateSensors(expectedSensor)
	require.NoError(err)

	sensor, err = repo.GetSensor(expectedSensor.ID)
	require.NoError(err)
	require.NotNil(sensor)
	// require.JSONEq(jsonEncoder(expectedSensor), jsonEncoder(sensor))

	var (
		expectedMeasuredValues = []*types.MeasuredValue{
			{
				ID:           "2e5a297a-3da0-46ae-89d2-0fcab0f1d5f7",
				Value:        32,
				ValueType:    types.Humidity,
				Date:         *timeNow(require),
				SensorID:     "8c74397f-8e60-4c9d-960d-3197747cef9a",
				CreationDate: *timeNow(require),
				UpdateDate:   nil,
			},
			{
				ID:           "d69f1b62-0c6c-4058-b42c-4a2821bd220c",
				Value:        38,
				ValueType:    types.Pressure,
				Date:         *timeNow(require),
				SensorID:     "8c74397f-8e60-4c9d-960d-3197747cef9a",
				CreationDate: *timeNow(require),
				UpdateDate:   nil,
			},
			{
				ID:           "ea945ae0-412b-4561-a191-1f8f1f909fa4",
				Value:        35.4,
				ValueType:    types.Temperature,
				Date:         *timeNow(require),
				SensorID:     "8c74397f-8e60-4c9d-960d-3197747cef9a",
				CreationDate: *timeNow(require),
				UpdateDate:   nil,
			},
		}
	)

	// Test: AddMeasuredValues
	err = repo.AddMeasuredValues(expectedMeasuredValues...)
	require.NoError(err)
}

func jsonEncoder(v interface{}) string {
	body := make([]byte, 0)
	buffer := bytes.NewBuffer(body)
	jsonEncoder := json.NewEncoder(buffer)
	jsonEncoder.SetIndent("", "  ")
	jsonEncoder.Encode(v)
	return buffer.String()
}

func timeNow(require *require.Assertions) *time.Time {
	now, err := time.Parse("2006-01-02 15:04:05.999999Z", time.Now().Format("2006-01-02 15:04:05.999999Z"))
	require.NoError(err)
	return &now
}