package cmd

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"

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

const (
	ConfigDirPerms  = 0o755
	ConfigFilePerms = 0o600
)

var (
	ErrMissingExpectedArguments = errors.New("missing expected arguments")
)

const (
	ConfigHostname = "hostname"
	ConfigUsername = "username"
	ConfigPassword = "password"
)

func addConfigPaths() {
	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() {
	addConfigPaths()

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

var configCmd = &cobra.Command{
	Use:   "config",
	Short: "Configure imap-notes",
	Long:  `Get and set configuration values for IMAP Notes`,
	Run: func(cmd *cobra.Command, args []string) {
		slog.Infof("Running config cobra command!")
	},
}

var configGetCmd = &cobra.Command{
	Use:   "get",
	Short: "Get a config value",
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) < 1 {
			return fmt.Errorf("missing config name to retrieve: %w", ErrMissingExpectedArguments)
		}

		return nil
	},

	Run: func(cmd *cobra.Command, args []string) {
		for _, arg := range args {
			fmt.Printf("%s: %s", arg, viper.Get(arg))
		}
		fmt.Println("")
	},
}

var configSetCmd = &cobra.Command{
	Use:   "set",
	Short: "Set a config value",
	ValidArgs: []string{
		ConfigHostname,
		ConfigUsername,
		ConfigPassword,
	},
	Args: cobra.ExactArgs(2),
	Run: func(cmd *cobra.Command, args []string) {
		viper.Set(args[0], args[1])
		slog.OnErrFatalf(viper.WriteConfig(), "failed writing value to config")
	},
}

func addConfigSubcommands() {
	configCmd.AddCommand(configGetCmd)
	configCmd.AddCommand(configSetCmd)
}