package sensor

import (
	"fmt"
	"os"

	uuid "github.com/satori/go.uuid"
	"github.com/spf13/cobra"
	"github.com/volker-raschek/flucky/pkg/cli"
	"github.com/volker-raschek/flucky/pkg/config"
	"github.com/volker-raschek/flucky/pkg/types"
)

// InitCmd initialize all sensor subcommands
func InitCmd(cmd *cobra.Command) error {
	sensorCmd := &cobra.Command{
		Use:   "sensor",
		Short: "Manage Sensors",
	}

	addSensorCmd := &cobra.Command{
		Use:     "add",
		Short:   "Add Sensor",
		Aliases: []string{"append"},
		Args:    cobra.ExactArgs(2),
		Example: `flucky sensor add --gpio GPIO14 indoor DHT11
flucky sensor add --wire-id 28-011432f0bb3d outdoor DS18B20
flucky sensor add --i2c-bus 1 --i2c-address 0x76 wetter-station BME280`,
		RunE: addSensor,
	}
	addSensorCmd.Flags().Bool("enabled", true, "Enable new sensor")
	addSensorCmd.Flags().String("gpio", "", "Defines the GPIO port")
	addSensorCmd.Flags().Uint8("i2c-address", 0, "Defines the I2C address on the I2C bus")
	addSensorCmd.Flags().Int("i2c-bus", 0, "Defines the I2C bus")
	addSensorCmd.Flags().String("location", "", "Location of the sensor")
	addSensorCmd.Flags().String("tick-duration", "1m", "Specifies how often measured values should be read from the sensor")
	addSensorCmd.Flags().String("wire-id", "", "Defines the Wire-ID")

	disableSensorCmd := &cobra.Command{
		Use:     "disable",
		Short:   "Disable Sensor",
		Args:    cobra.ExactArgs(1),
		Example: "flucky sensor disable outdoor",
		RunE:    disableSensor,
	}

	enableSensorCmd := &cobra.Command{
		Use:     "enable",
		Short:   "Enable Sensor",
		Example: "flucky sensor enable outdoor",
		Args:    cobra.ExactArgs(1),
		RunE:    enableSensor,
	}

	listSensorCmd := &cobra.Command{
		Use:     "list",
		Short:   "List Sensors",
		Aliases: []string{"ls"},
		RunE:    listSensors,
	}

	removeSensorCmd := &cobra.Command{
		Use:     "remove",
		Short:   "Remove Sensor",
		Aliases: []string{"rm"},
		Example: "flucky sensor remove outdoor",
		Args:    cobra.ExactArgs(1),
		RunE:    removeSensor,
	}
	removeSensorCmd.Flags().Bool("definitive", true, "Remove the sensor definitive from the backend")

	renameSensorCmd := &cobra.Command{
		Use:   "rename",
		Short: "Rename Sensor",
		Args:  cobra.ExactArgs(2),
		Example: `flucky sensor rename indoor outdoor
flucky sensor rename f98b00ea-a9b2-4e00-924f-113859d0af2d outdoor`,
		RunE: renameSensor,
	}

	for _, subCommand := range []*cobra.Command{
		addSensorCmd,
		disableSensorCmd,
		enableSensorCmd,
		listSensorCmd,
		removeSensorCmd,
		renameSensorCmd,
	} {
		sensorCmd.AddCommand(subCommand)
	}

	cmd.AddCommand(sensorCmd)

	return nil
}

func addSensor(cmd *cobra.Command, args []string) error {

	sensor := &types.Sensor{
		ID:    uuid.NewV4().String(),
		Name:  args[0],
		Model: args[1],
	}

	sensorLocation, err := cmd.Flags().GetString("location")
	if err != nil {
		return err
	}
	sensor.Location = sensorLocation

	sensorEnabled, err := cmd.Flags().GetBool("enabled")
	if err != nil {
		return err
	}
	sensor.Enabled = sensorEnabled

	sensorGPIO, err := cmd.Flags().GetString("gpio")
	if err != nil {
		return err
	}
	if len(sensorGPIO) > 0 {
		sensor.GPIONumber = sensorGPIO
	}

	sensorI2CAddress, err := cmd.Flags().GetUint8("i2c-address")
	if err != nil {
		return err
	}
	if sensorI2CAddress > 0 {
		sensor.I2CAddress = &sensorI2CAddress
	}

	sensorI2CBus, err := cmd.Flags().GetInt("i2c-bus")
	if err != nil {
		return err
	}
	if sensorI2CBus > 0 {
		sensor.I2CBus = &sensorI2CBus
	}

	sensorTickDuration, err := cmd.Flags().GetString("tick-duration")
	if err != nil {
		return err
	}
	sensor.TickDuration = sensorTickDuration

	sensorWireID, err := cmd.Flags().GetString("wire-id")
	if err != nil {
		return err
	}
	if len(sensorWireID) > 0 {
		sensor.WireID = &sensorWireID
	}

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	// add sensor entry to list
	err = cnf.AddSensor(sensor)
	if err != nil {
		return err
	}

	// save new configuration
	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}

	return nil
}

func disableSensor(cmd *cobra.Command, args []string) error {

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	err = cnf.DisableSensor(args[0])
	if err != nil {
		return err
	}

	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}

	return nil
}

func enableSensor(cmd *cobra.Command, args []string) error {

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	err = cnf.EnableSensor(args[0])
	if err != nil {
		return err
	}

	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}
	return nil
}

func listSensors(cmd *cobra.Command, args []string) error {

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	err = cli.PrintSensors(cnf, os.Stdout)
	if err != nil {
		return err
	}

	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}

	return nil
}

func removeSensor(cmd *cobra.Command, args []string) error {

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	definitive, err := cmd.Flags().GetBool("definitive")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	err = cnf.RemoveSensor(args[0], definitive)
	if err != nil {
		return err
	}

	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}

	return nil
}

func renameSensor(cmd *cobra.Command, args []string) error {

	configFile, err := cmd.Flags().GetString("config")
	if err != nil {
		return fmt.Errorf("No config file defined")
	}

	cnf, err := config.Read(configFile)
	if err != nil {
		return err
	}

	err = cnf.RenameSensor(args[0], args[1])
	if err != nil {
		return err
	}

	err = config.Write(cnf, configFile)
	if err != nil {
		return err
	}

	return nil
}