// Class to interface with the SD card

using System;
using System.Threading;
using System.Text;
using Microsoft.SPOT;
using Microsoft.SPOT.IO;
using Microsoft.SPOT.Hardware;
using System.IO;
using GHI.IO.Storage;
using GHI.Processor;

namespace IMULogger
{
    public class SDMemory
    {
        private static SDCard sdCard;

        //----------------------------------------------------------------------------------------------------
        // Method: Create a new file on SD card
        //----------------------------------------------------------------------------------------------------
        public static void SDNewFile(string fileName, string text)
        {
            // if necessary, check that SD is present here...
            sdCard = new SDCard();
            sdCard.Mount();

            bool fs_ready = false;
            RemovableMedia.Insert += (a, b) =>
            {
                fs_ready = true;
            };
            while (!fs_ready)
            {
                System.Threading.Thread.Sleep(1);
            }

            // Assume only one storage device is available
            // and that the media is formatted

            string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;

            StreamWriter textFile = new StreamWriter(rootDirectory + fileName, false);
            textFile.WriteLine(text);

            textFile.Flush();
            textFile.Close();

            sdCard.Unmount();
            sdCard.Dispose();
        }

        //----------------------------------------------------------------------------------------------------
        // Method: Write data to a file on SD card
        //----------------------------------------------------------------------------------------------------

        private static StreamWriter textFile = new StreamWriter(rootDirectory + fileName, true);
        private static string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;

        
        public static void SDWrite(string fileName, string text)
        {
            // if necessary, check that SD is present here...
            sdCard = new SDCard();
            sdCard.Mount();

            bool fs_ready = false;
            RemovableMedia.Insert += (a, b) =>
            {
                fs_ready = true;
            };
            while (!fs_ready)
            {
                System.Threading.Thread.Sleep(1);
            }

            // Assume only one storage device is available
            // and that the media is formatted

            textFile.WriteLine(text);          

            textFile.Flush();
            textFile.Close();

            sdCard.Unmount();
            sdCard.Dispose();
        }

        //----------------------------------------------------------------------------------------------------
        // Method: Read data from SD card file
        //----------------------------------------------------------------------------------------------------
        public static void SDRead(string fileName)
        {
            // ... If desired, check if SD is inserted
            // SD Card is inserted
            // Create a new storage device
            SDCard sdCard = new SDCard();

            // Mount the file system
            sdCard.Mount();

            bool fs_ready = false;
            RemovableMedia.Insert += (a, b) =>
            {
                fs_ready = true;
            };

            while (!fs_ready)
            {
                System.Threading.Thread.Sleep(1);
            }

            // Assume one storage device is available, 
            // access it through NETMF
            string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;
            FileStream FileHandle = new FileStream(rootDirectory + fileName, FileMode.Open, FileAccess.Read);
            
            // Buffer size to read bytes from file
            byte[] data = new byte[10000];
            int read_count = FileHandle.Read(data, 0, data.Length);
            FileHandle.Close();

            Debug.Print("\n\nThe size of data read is: " + read_count.ToString());
            Debug.Print("Data from file:");
            Debug.Print(new string(Encoding.UTF8.GetChars(data), 0, read_count));

            sdCard.Unmount();
            sdCard.Dispose();

        }



    }
}