using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BITKit.IO
{
    public class FolderProvider : IStorageFolder
    {
        readonly DirectoryInfo directoryInfo;
        public FolderProvider(DirectoryInfo directoryInfo)
        {
            this.directoryInfo = directoryInfo;
        }
        public FolderProvider(string path)
        {
            this.directoryInfo=new DirectoryInfo(path);
        }
        public DateTime GetLastUpdated()
        {
            return directoryInfo.LastWriteTime;
        }

        public string GetName()
        {
            return directoryInfo.Name;
        }

        public IStorageFolder GetParent()
        {
            return new FolderProvider(directoryInfo.Parent);
        }

        public string GetPath()
        {
            return directoryInfo.FullName;
        }

        public long GetSize()
        {
            return DirSize(directoryInfo);
        }
        long DirSize(DirectoryInfo d)
        {
            long size = 0;
            // Add file sizes.
            FileInfo[] fis = d.GetFiles();
            foreach (FileInfo fi in fis)
            {
                size += fi.Length;
            }
            // Add subdirectory sizes.
            DirectoryInfo[] dis = d.GetDirectories();
            foreach (DirectoryInfo di in dis)
            {
                size += DirSize(di);
            }
            return size;
        }
    }
}