package pressure

import (
	"context"
	"fmt"
	"os"

	"github.com/volker-raschek/flucky/pkg/cli"
	"github.com/volker-raschek/flucky/pkg/config"
	"github.com/volker-raschek/flucky/pkg/sensor"
	"github.com/volker-raschek/flucky/pkg/storage"
	"github.com/volker-raschek/flucky/pkg/types"
	"github.com/spf13/cobra"
)

var (
	compression bool
	configFile  string
	save        bool
	round       float64
)

// InitCmd initialize all pressure subcommands
func InitCmd(cmd *cobra.Command) error {

	pressureCmd := &cobra.Command{
		Use:   "pressure",
		Short: "Operates with pressure values",
	}

	listPressuresCmd := &cobra.Command{
		Use:     "list",
		Short:   "List pressure values from specified or all sensors",
		Example: fmt.Sprintf("flucky pressure list"),
		RunE:    listHumidities,
	}

	readPressuresCmd := &cobra.Command{
		Use:     "read",
		Short:   "Read pressure values from specified or all sensors",
		Example: fmt.Sprintf("flucky pressure read"),
		RunE:    readPressure,
	}
	readPressuresCmd.Flags().BoolVar(&save, "save", true, "Save humidities")
	readPressuresCmd.Flags().BoolVar(&compression, "compression", true, "Compress measured with logged temperatures")
	readPressuresCmd.Flags().Float64VarP(&round, "round", "r", 0.25, "Round values. The value 0 deactivates the function")

	pressureCmd.AddCommand(listPressuresCmd)
	pressureCmd.AddCommand(readPressuresCmd)
	cmd.AddCommand(pressureCmd)

	return nil
}

func listHumidities(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
	}

	ctx := context.Background()
	storageEndpoint, err := cnf.GetStorageEndpointURL()
	if err != nil {
		return err
	}

	measuredValues, err := storage.Read(ctx, storageEndpoint)
	if err != nil {
		return err
	}

	measuredValues = types.SelectMeasuredValues(types.MeasuredValueTypePressure, measuredValues)

	cli.PrintMeasuredValues(measuredValues, cnf, os.Stdout)

	return nil
}

func readPressure(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
	}

	// fetch all temperature sensors or sensors by args
	sensors := make([]sensor.Sensor, 0)
	if len(args) == 0 {
		sensors = cnf.GetPressureSensors(config.ENABLED)
	} else {
		sensors = cnf.GetPressureSensorsByName(args)
	}

	if len(sensors) == 0 {
		return fmt.Errorf("No sensors matched")
	}

	measuredValues, err := sensor.Read(sensors, types.MeasuredValueTypePressure)
	if err != nil {
		return err
	}

	measuredValues = types.SelectMeasuredValues(types.MeasuredValueTypePressure, measuredValues)

	cli.PrintMeasuredValues(measuredValues, cnf, os.Stdout)

	if save {
		storageEndpoint, err := cnf.GetStorageEndpointURL()
		if err != nil {
			return err
		}

		ctx := context.Background()

		err = storage.Write(ctx, measuredValues, storageEndpoint)
		if err != nil {
			return err
		}
	}
	return nil

}