package cmd

import (
	"fmt"
	"log"
	"math"
	"os"
	"time"

	"github.com/Masterminds/semver"
	"github.com/volker-raschek/flucky/cmd/completion"
	"github.com/volker-raschek/flucky/cmd/compression"
	"github.com/volker-raschek/flucky/cmd/convert"
	"github.com/volker-raschek/flucky/cmd/daemon"
	"github.com/volker-raschek/flucky/cmd/db"
	"github.com/volker-raschek/flucky/cmd/humidity"
	"github.com/volker-raschek/flucky/cmd/pressure"
	"github.com/volker-raschek/flucky/cmd/rgbled"
	"github.com/volker-raschek/flucky/cmd/sensor"
	"github.com/volker-raschek/flucky/cmd/temperature"
	"github.com/volker-raschek/flucky/pkg/types"
	"github.com/volker-raschek/go-logger/pkg/logger"

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

var (
	configFile string
)

// Execute a
func Execute(version *semver.Version) error {

	rootCmd := &cobra.Command{
		Use:               "flucky",
		Short:             "flucky - operate with differen sensors, his values and remote servers to synchronize measured values",
		PersistentPreRunE: preRunError,
		Version:           version.String(),
	}

	logLevel := ""
	rootCmd.PersistentFlags().StringVar(&configFile, "config", "/etc/flucky/config.json", "Config file")
	rootCmd.PersistentFlags().StringVar(&logLevel, "loglevel", "info", "Set the Loglevel. Possible values: debug, info, warn, error, fatal")

	subCommands := []func(cmd *cobra.Command) error{
		completion.InitCmd,
		compression.InitCmd,
		convert.InitCmd,
		daemon.InitCmd,
		humidity.InitCmd,
		pressure.InitCmd,
		rgbled.InitCmd,
		sensor.InitCmd,
		temperature.InitCmd,
	}

	for _, subCommand := range subCommands {
		if err := subCommand(rootCmd); err != nil {
			return err
		}
	}

	err := db.InitCmd(rootCmd, version)
	if err != nil {
		return err
	}

	err = rootCmd.Execute()
	if err != nil {
		return err
	}
	return nil
}

func parseLogger(logLevel string) logger.Logger {
	log.Println(logLevel)
	switch logLevel {
	case "debug", "DEBUG":
		return logger.NewDefaultLogger(logger.LogLevelDebug)
	case "info", "INFO":
		return logger.NewDefaultLogger(logger.LogLevelInfo)
	case "warn", "WARN":
		return logger.NewDefaultLogger(logger.LogLevelWarn)
	case "error", "ERROR":
		return logger.NewDefaultLogger(logger.LogLevelError)
	case "fatal", "FATAL":
		return logger.NewDefaultLogger(logger.LogLevelFatal)
	default:
		return logger.NewDefaultLogger(logger.LogLevelInfo)
	}
}

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

	// check if config file exists
	if _, err := os.Stat(configFile); os.IsNotExist(err) {
		hostname, err := os.Hostname()
		if err != nil {
			return fmt.Errorf("Can not locate the hostname: %v", err)
		}

		// Time must be truncted for postgres. Postgres currently does not support
		// nanoseconds which is automatically include into the go time object
		postgresTimeStamp := time.Now()
		location, err := time.LoadLocation("Europe/Berlin")
		if err != nil {
			return err
		}
		postgresTimeStamp = time.Date(postgresTimeStamp.Year(), postgresTimeStamp.Month(), postgresTimeStamp.Day(), postgresTimeStamp.Hour(), postgresTimeStamp.Minute(), postgresTimeStamp.Second(), int(math.Round(float64(postgresTimeStamp.Nanosecond())/1000000)*1000000), location)

		// Default configuration
		cnf := config.Configuration{
			Device: &types.Device{
				ID:           uuid.NewV4().String(),
				Name:         hostname,
				CreationDate: postgresTimeStamp,
			},
			StorageEndpoint: "file:///var/log/flucky/logfile.csv",
		}

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

	return nil
}