package repository

import (
	"context"
	"net/url"
	"strings"

	"github.com/volker-raschek/flucky/pkg/repository/db"
	"github.com/volker-raschek/flucky/pkg/types"
	"github.com/volker-raschek/go-logger/pkg/logger"
)

// Repository represent a repository where all devices, sensors and measured
// values are stored.
type Repository struct {
	database db.Database
}

// AddDevices to the repository
func (repo *Repository) AddDevices(devices ...*types.Device) error {
	return repo.database.InsertDevices(context.Background(), devices...)
}

// AddMeasuredValues to the repository
func (repo *Repository) AddMeasuredValues(measuredValues ...*types.MeasuredValue) error {
	return repo.database.InsertMeasuredValues(context.Background(), measuredValues...)
}

// AddSensors to the repository
func (repo *Repository) AddSensors(sensors ...*types.Sensor) error {
	return repo.database.InsertSensors(context.Background(), sensors...)
}

// DisableSensorsByNames disable all sensors which match bei their name
func (repo *Repository) DisableSensorsByNames(sensorNames ...string) error {
	sensors, err := repo.GetSensors()
	if err != nil {
		return err
	}

	matchedSensors := make([]*types.Sensor, 0)
	for _, sensor := range sensors {
		for _, sensorName := range sensorNames {
			if strings.Compare(sensor.Name, sensorName) == 0 {
				sensor.Enabled = false
				matchedSensors = append(matchedSensors, sensor)
			}
		}
	}

	return repo.UpdateSensors(matchedSensors...)
}

// EnableSensorsByNames enable all sensors which match bei their name
func (repo *Repository) EnableSensorsByNames(sensorNames ...string) error {
	sensors, err := repo.GetSensors()
	if err != nil {
		return err
	}

	matchedSensors := make([]*types.Sensor, 0)
	for _, sensor := range sensors {
		for _, sensorName := range sensorNames {
			if strings.Compare(sensor.Name, sensorName) == 0 {
				sensor.Enabled = true
				matchedSensors = append(matchedSensors, sensor)
			}
		}
	}

	return repo.UpdateSensors(matchedSensors...)
}

// GetDevice returns a device by his id. If no device has been found, the
// function returns nil.
func (repo *Repository) GetDevice(deviceID string) (*types.Device, error) {
	return repo.database.SelectDevice(context.Background(), deviceID)
}

// GetDevices returns all devices. If no devices has been found, the function
// returns nil.
func (repo *Repository) GetDevices() ([]*types.Device, error) {
	return repo.database.SelectDevices(context.Background())
}

// GetSensor returns a sensor by his id. If no sensor has been found, the
// function returns nil.
func (repo *Repository) GetSensor(sensorID string) (*types.Sensor, error) {
	return repo.database.SelectSensor(context.Background(), sensorID)
}

// GetSensors returns all sensors. If no sensors has been found, the function
// returns nil.
func (repo *Repository) GetSensors() ([]*types.Sensor, error) {
	return repo.database.SelectSensors(context.Background())
}

// GetSensorsByDeviceID returns all sensors by a device id. If no sensor has
// been found by the id, the function returns nil.
func (repo *Repository) GetSensorsByDeviceID(deviceID string) ([]*types.Sensor, error) {
	cachedSensors := make([]*types.Sensor, 0)
	sensors, err := repo.GetSensors()
	if err != nil {
		return nil, err
	}

	for _, sensor := range sensors {
		if strings.Compare(sensor.DeviceID, deviceID) == 0 {
			cachedSensors = append(cachedSensors, sensor)
		}
	}

	return cachedSensors, nil
}

// RemoveDevices removes devices by their ids from the repository. Additional
// all sensors and measured values, which are in relation with the device
// respectively the sensors will also be deleted.
func (repo *Repository) RemoveDevices(deviceIDs ...string) error {
	return repo.database.DeleteDevices(context.Background(), deviceIDs...)
}

// RenameSensors all sensors which match by their current name to the new name
func (repo *Repository) RenameSensors(oldName string, newName string) error {
	sensors, err := repo.GetSensors()
	if err != nil {
		return err
	}

	matchedSensors := make([]*types.Sensor, 0)
	for _, sensor := range sensors {
		if strings.Compare(sensor.Name, oldName) == 0 {
			sensor.Name = newName
			matchedSensors = append(matchedSensors, sensor)
		}
	}

	return repo.UpdateSensors(matchedSensors...)
}

// RemoveSensors removes sensors by their ids from the repository. Additional
// all measured values, which are in relation with the sensor will also be
// deleted.
func (repo *Repository) RemoveSensors(sensorIDs ...string) error {
	return repo.database.DeleteSensors(context.Background(), sensorIDs...)
}

// RemoveSensorsByNames removes all sensors which match bei their name
func (repo *Repository) RemoveSensorsByNames(sensorNames ...string) error {
	sensors, err := repo.GetSensors()
	if err != nil {
		return err
	}

	matchedSensorIDs := make([]string, 0)
	for _, sensor := range sensors {
		for _, sensorName := range sensorNames {
			if strings.Compare(sensor.Name, sensorName) == 0 {
				matchedSensorIDs = append(matchedSensorIDs, sensor.ID)
			}
		}
	}

	return repo.RemoveSensors(matchedSensorIDs...)
}

// UpdateDevices update devices which are stored into the repository by their
// id. The id of the device can not be updated.
func (repo *Repository) UpdateDevices(devices ...*types.Device) error {
	return repo.database.UpdateDevices(context.Background(), devices...)
}

// UpdateSensors update sensors which are stored into the repository by their
// id. The id of the sensor can not be updated.
func (repo *Repository) UpdateSensors(sensors ...*types.Sensor) error {
	return repo.database.UpdateSensors(context.Background(), sensors...)
}

// New returns a new repository based on the storageEndpoint
func New(storageEndpoint *url.URL, flogger logger.Logger) (*Repository, error) {
	database, err := db.New(storageEndpoint, flogger)
	if err != nil {
		return nil, err
	}

	return &Repository{
		database: database,
	}, nil
}