package config

/*
Load.go contains methods to load values from config, flags and env.
*/

import (
	"FRMS/internal/pkg/logging"
	"fmt"

	"github.com/spf13/viper"
)

func LoadConfig(fname string) *viper.Viper {
	// Demarshalls a given filename into the struct
	// returns nil if successful
	config := viper.New()
	configPath := "$HOME/FRMS/internal/configs"
	logging.Debug(logging.DStart, "Loading config for %s", fname)
	config.SetConfigName(fname)
	config.SetConfigType("yaml")
	//viper.AddConfigPath("/etc/frms/config")
	config.AddConfigPath(configPath)
	// struct and env vars

	// Sets env vars
	config.AutomaticEnv()

	// reading
	if err := config.ReadInConfig(); err != nil {
		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
			// no config file found
			fmt.Printf("No config file found! creating empty one at %s.\n", configPath)
			if err = config.WriteConfigAs(configPath); err != nil {
				panic(err)
			}
		} else {
			panic(err)
		}
	}

	logging.Debug(logging.DStart, "CON Loaded configs from %v", config.ConfigFileUsed())

	// returning config object
	return config
}