package main

import (
	"flag"
	"log"
	"os"
	"path/filepath"
)

type Config struct {
	todoDir      string
	taskFilePath string
	doneFilePath string
}

func NewConfig() Config {
	todoDirArg := flag.String("dir", "", "Path to Todo directory")
	flag.Parse()

	todoDir := GetTodoDir(*todoDirArg)
	taskFilePath := filepath.Join(todoDir, "todo.txt")
	doneFilePath := filepath.Join(todoDir, "done.txt")

	if _, err := os.Stat(taskFilePath); os.IsNotExist(err) {
		_, e := os.Create(taskFilePath)
		if e != nil {
			log.Fatal(e)
		}

	}

	return Config{
		todoDir:      todoDir,
		taskFilePath: taskFilePath,
		doneFilePath: doneFilePath,
	}
}

func GetTodoDir(todoDirArg string) string {
	var todoDir string

	if todoDirArg == "" {
		envPath, exists := os.LookupEnv("TODO_DIR")
		if exists {
			todoDir = envPath
		} else {
			homePath := os.Getenv("HOME")
			todoDir = filepath.Join(homePath, ".todo")
		}
	} else {
		todoDir = todoDirArg
	}

	err := os.MkdirAll(todoDir, os.ModePerm)

	if err != nil {
		log.Fatal(err)
	}

	return todoDir
}