package main

import (
	"fmt"
	"github.com/BurntSushi/toml"
	"os"
	"path/filepath"
)

type Config struct {
	WowDir         string
	LaunchCmd      string
	EnableLauncher bool
}

const (
	configDirName = "epochcli"
	configName    = "config.toml"
)

var cfgPath string

func setupConfig(rerun bool) (*Config, error) {
	home := os.Getenv("HOME")
	if home == "" {
		return nil, fmt.Errorf("$HOME environment variable not set")
	}

	newConfig := Config{
		WowDir:         defaultWowPath,
		LaunchCmd:      defaultLaunchCmd,
		EnableLauncher: false,
	}

	cfgPath = filepath.Join(home, ".config", configDirName, configName)

	_, statErr := os.Stat(cfgPath)
	if rerun || os.IsNotExist(statErr) {
		fmt.Println("Enter the path to your Wow directory below:")
		_, err := fmt.Scanln(&newConfig.WowDir)
		if err != nil {
			return nil, err
		}

		for {
			fmt.Printf("Do you want to use epochcli to launch Wow? Select No if you plan on using a launcher tool like Lutris (y/n): ")
			var s string
			_, err := fmt.Scanf("%s", &s)
			if err != nil {
				return nil, err
			}

			if s == "y" || s == "Y" {
				newConfig.EnableLauncher = true
				fmt.Println("Enter your launch command to start Wow below. If you would rather configure this later in the configuration file, just press Enter")
				fmt.Printf("> ")
				_, err = fmt.Scanf("%s", &s)
				if err != nil {
					return nil, err
				}
				if s != "" {
					newConfig.LaunchCmd = s
				}
				break
			}

			if s == "n" || s == "N" {
				break
			}

			fmt.Println("Please enter a valid value of either 'y' or 'n'")
		}

		os.MkdirAll(filepath.Join(home, ".config", configDirName), 0755)

		file, err := os.Create(cfgPath)
		if err != nil {
			return nil, err
		}
		defer file.Close()

		encoder := toml.NewEncoder(file)
		if err = encoder.Encode(newConfig); err != nil {
			return nil, err
		}

		fmt.Println("Created new config at ", cfgPath)
	}

	_, err := toml.DecodeFile(cfgPath, &newConfig)
	if err != nil {
		return nil, err
	}

	return &newConfig, nil
}