/*
Copyright © 2021 Arsen Musayelyan

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

import (
	"fmt"
	"net/http"
	"strings"

	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"github.com/vmihailenco/msgpack/v5"
	"go.arsenm.dev/lasso/internal/types"
)

var cfgFile string

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:   "lasso",
	Short: "A brief description of your application",
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	cobra.CheckErr(rootCmd.Execute())
}

func init() {
	cobra.OnInitialize(initConfig)
	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "Config file path")
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	if cfgFile != "" {
		// Use config file from the flag.
		viper.SetConfigFile(cfgFile)
	} else {
		// Search for config in config directory with name "lasso" (without extension).
		viper.AddConfigPath("/etc/lasso")
		viper.SetConfigType("toml")
		viper.SetConfigName("lasso")
	}

	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
	viper.SetEnvPrefix("lasso")
	viper.AutomaticEnv() // Read in environment variables that match

	// If a config file is found, read it in.
	viper.ReadInConfig()
}

// httpError logs an error as well as writing it to the HTTP response
func httpError(res http.ResponseWriter, statusCode int, err error, msg string) {
	// Write status code
	res.WriteHeader(statusCode)
	var message string
	if err != nil {
		// Get message string containing error string
		message = fmt.Sprintf("%s: %s", msg, err)
		// Log error
		log.Error().Err(err).Msg(msg)
	} else {
		// Set message string to given msg
		message = msg
		// Log message
		log.Error().Msg(msg)
	}
	// Encode error response to HTTP response
	msgpack.NewEncoder(res).Encode(types.Response{
		Error:   true,
		Message: message,
	})
}