package k8s_manager

import (
	"fmt"
	"os"
	"reflect"
)

type Config struct {
	JwtKey     string
	AseKey     string
	DBHost     string
	DBUser     string
	DBPassword string
	NFSHost    string
	NFSPath    string
}

var config *Config

func getField(v *Config, field string) string {
	r := reflect.ValueOf(v)
	f := reflect.Indirect(r).FieldByName(field)
	return f.String()
}

func setField(v *Config, field string, value string) {
	r := reflect.ValueOf(v)
	f := reflect.Indirect(r).FieldByName(field)
	f.SetString(value)
}

func InitConfig() {
	config = &Config{}
	config.JwtKey = os.Getenv("JWT_KEY")
	config.AseKey = os.Getenv("ASE_KEY")
	config.DBHost = os.Getenv("DB_HOST")
	config.DBUser = os.Getenv("DB_USER")
	config.DBPassword = os.Getenv("DB_PASS")
	config.NFSHost = os.Getenv("NFS_HOST")
	config.NFSPath = os.Getenv("NFS_PATH")

	mustFields := []string{"JwtKey", "AseKey", "DBHost", "DBUser", "DBPassword", "NFSHost", "NFSPath"}
	optionalFields := map[string]string{}
	for _, f := range mustFields {
		if getField(config, f) == "" {
			panic(fmt.Sprintf("field %s must be set.", f))
		}
	}
	for f, v := range optionalFields {
		if getField(config, f) == "" {
			setField(config, f, v)
		}
	}

}

func GetConfig() *Config {
	return config
}