package lib

import (
	"os"
	"path/filepath"

	"git.iamthefij.com/iamthefij/slog"
	"github.com/spf13/viper"
)

const (
	ConfigDirPerms  = 0o755
	ConfigFilePerms = 0o600
)

var singleClient *Client

func GetClient() (*Client, error) {
	if singleClient != nil {
		return singleClient, nil
	}

	hostname := viper.GetString("hostname")
	username := viper.GetString("username")
	password := viper.GetString("password")

	var err error

	singleClient, err = ConnectImap(hostname, username, password)
	if err != nil {
		return nil, err
	}

	return singleClient, nil
}

func AddConfigPaths(configFile string) {
	if configFile != "" {
		viper.SetConfigFile(configFile)
	} else {
		viper.SetConfigName("config")
		viper.SetConfigType("toml")

		userConfigDir, err := os.UserConfigDir()
		if err == nil {
			userConfigPath := filepath.Join(userConfigDir, "imap-notes")
			_ = os.MkdirAll(userConfigPath, ConfigDirPerms)
			viper.AddConfigPath(userConfigPath)
		}

		viper.AddConfigPath("$HOME/.imap-notes")
	}
}

func InitializeConfig(configFile string) {
	AddConfigPaths(configFile)

	if err := viper.ReadInConfig(); err != nil {
		slog.OnErrFatalf(viper.SafeWriteConfig(), "failed writing default config")
		slog.OnErrFatalf(viper.ReadInConfig(), "failed to read config")
	}
}