using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using ZipArchiver.Application;

namespace ZipArchiver.Database
{
    public class FileDatabase : IDatabase
    {
        private string fileName;
        public FileDatabase(string fileName)
        {
            this.fileName = fileName;

            if (!File.Exists(fileName))
            {
                Write(default(ZipperConfig));
            }
        }

        public ZipperConfig Read()
        {
            if (!File.Exists(fileName))
            {
                return default(ZipperConfig);
            }

            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(ZipperConfig));
                using (StreamReader reader = new StreamReader(fileName, new UTF8Encoding(false)))
                {
                    return (ZipperConfig)serializer.Deserialize(reader);
                }
            } catch (IOException e)
            {
                Console.Write(e);
                return null;
            }
        }

        public void Write(ZipperConfig config)
        {
            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(ZipperConfig));
                using (StreamWriter writer = new StreamWriter(fileName, false, new UTF8Encoding(false)))
                {
                    serializer.Serialize(writer, config);
                }
            } catch (IOException)
            {
            }
        }
    }
}