using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace NumpadMonitor
{
    internal class KeyCodeReaderWriter
    {
        private const string Path = @"%APPDATA%\KeyboardCalculator\";
        private const string Filename = "KeyConfig.json";

        static public void Write(List<KeyHandler> keyHandlers)
        {
            List<KeyInfo> keyinfo = new List<KeyInfo>();
            foreach (KeyHandler handler in keyHandlers)
            {
                keyinfo.Add(handler.KeyInfo);
            }
            string output = JsonConvert.SerializeObject(keyinfo);

            string path = Environment.ExpandEnvironmentVariables(Path);
            Directory.CreateDirectory(path);
            File.WriteAllText(path + Filename, output, Encoding.UTF8);
        }

        internal static List<KeyInfo> Read()
        {
            string path = Environment.ExpandEnvironmentVariables(Path);
            if (!File.Exists(path + Filename)) return null;
            string filestring = File.ReadAllText(path + Filename, Encoding.UTF8);
            List<KeyInfo> keyInfo = JsonConvert.DeserializeObject<List<KeyInfo>>(filestring);
            return keyInfo;
        }
    }
}