package config

import (
	"encoding/json"
	"io/ioutil"
	"os"
)

var (
	//defaultPath    string
	defaults       = map[string]interface{}{}
	configName     = "config"
	configType     = "json"
	configFile     = "config.json"
	configPaths    []string
	defaultEnvName = "P2PRC"
)

type Config struct {
	MachineName              string
	IPTable                  string
	DockerContainers         string
	DefaultDockerFile        string
	DockerRunLogs            string
	SpeedTestFile            string
	IPV6Address              string
	PluginPath               string
	TrackContainersPath      string
	ServerPort               string
	ProxyPort                string
	GroupTrackContainersPath string
	FRPServerPort            string
	BehindNAT                string
	IPTableKey               string
	PublicKeyFile            string
	PrivateKeyFile           string
	PemFile                  string
	KeyFile                  string
	BareMetal                bool
	UnsafeMode               bool
	CustomConfig             interface{}
	//NetworkInterface  string
	//NetworkInterfaceIPV6Index int
}

// GetCurrentPath Getting P2PRC Directory from environment variable
func GetCurrentPath() (string, error) {
	curDir := os.Getenv("PWD")
	return curDir + "/", nil
}

// GetPathP2PRC Getting P2PRC Directory from environment variable
func GetPathP2PRC(Envname string) (string, error) {
	if Envname != "" {
		err := SetEnvName(Envname)
		if err != nil {
			return "", err
		}
	}
	curDir := os.Getenv(defaultEnvName)
	if curDir == "" {
		// if the OS env path is not found then you use
		// the current directory path.
		currentPath, _ := GetCurrentPath()
		return currentPath, nil
	}
	return curDir + "/", nil
}

// SetEnvName Sets the environment name
// This is to ensure that the Path of your project is detected from
// your environment variable
// This is useful when extending the use case of P2PRC
func SetEnvName(EnvName string) error {
	defaultEnvName = EnvName
	// Handling error to be implemented only if needed
	return nil
}

func GetEnvName() string {
	return defaultEnvName
}

// ConfigInit Pass environment name as an optional parameter
func ConfigInit(defaultsParameter map[string]interface{}, CustomConfig interface{}, envNameOptional ...string) (*Config, error) {
	if len(envNameOptional) > 0 {
		defaultEnvName = envNameOptional[0]
	}
	//
	////Setting current directory to default path
	//defaultPath, err := GetPathP2PRC(defaultEnvName)
	//if err != nil {
	//    return nil, err
	//}
	////Paths to search for config file
	//configPaths = append(configPaths, defaultPath)
	//
	////Add all possible configurations paths
	//for _, v := range configPaths {
	//    viper.AddConfigPath(v)
	//}
	//
	////Read config file
	//if err := viper.ReadInConfig(); err != nil {
	//    // If the error thrown is config file not found
	//    //Sets default configuration to viper
	//    for k, v := range defaults {
	//        viper.SetDefault(k, v)
	//    }
	//    viper.SetConfigName(configName)
	//    viper.SetConfigFile(configFile)
	//    viper.SetConfigType(configType)
	//
	//    if err = viper.WriteConfig(); err != nil {
	//        return nil, err
	//    }
	//}
	//
	//// Adds configuration to the struct
	//var config Config
	//if err := viper.Unmarshal(&config); err != nil {
	//    return nil, err
	//}
	//
	//return &config, nil

	defaultPath, err := GetPathP2PRC(defaultEnvName)
	if err != nil {
		return nil, err
	}

	// Open our jsonFile
	jsonFile, err := os.Open(defaultPath + configFile)
	// if we os.Open returns an error then handle it
	if err != nil {
		return nil, err
	}

	// defer the closing of our jsonFile so that we can parse it later on
	defer jsonFile.Close()

	byteValue, _ := ioutil.ReadAll(jsonFile)

	var config Config
	json.Unmarshal(byteValue, &config)

	if CustomConfig != nil {
		// Convert Custom Config to byte
		customConfigByte, err := json.Marshal(config.CustomConfig)
		if err != nil {
			return nil, err
		}

		// Again map the byte to the CustomConfig interface
		json.Unmarshal(customConfigByte, &CustomConfig)
	}

	return &config, nil
}

func (c *Config) WriteConfig() error {
	//Getting Current Directory from environment variable
	//curDir := os.Getenv("REMOTEGAMING")

	defaultPath, err := GetPathP2PRC(defaultEnvName)
	if err != nil {
		return err
	}

	file, _ := json.MarshalIndent(c, "", " ")

	_ = ioutil.WriteFile(defaultPath+"config.json", file, 0644)
	return nil
}

// GetPublicKey Gets public key of the current machine
// based on the path provided on the
// config file
func (c *Config) GetPublicKey() (string, error) {
	publicKey, err := ioutil.ReadFile(c.PublicKeyFile) // just pass the file name
	if err != nil {
		return "", err
	}
	return string(publicKey), nil
}