#region Copyright
////////////////////////////////////////////////////////////////////////////////
// The following FIT Protocol software provided may be used with FIT protocol
// devices only and remains the copyrighted property of Dynastream Innovations Inc.
// The software is being provided on an "as-is" basis and as an accommodation,
// and therefore all warranties, representations, or guarantees of any kind
// (whether express, implied or statutory) including, without limitation,
// warranties of merchantability, non-infringement, or fitness for a particular
// purpose, are specifically disclaimed.
//
// Copyright 2016 Dynastream Innovations Inc.
////////////////////////////////////////////////////////////////////////////////
// ****WARNING****  This file is auto-generated!  Do NOT edit this file.
// Profile Version = 16.60Release
// Tag = production-akw-16.60.00-0-g5d3d436
////////////////////////////////////////////////////////////////////////////////

#endregion

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.IO;

namespace Dynastream.Fit
{
    /// <summary>
    /// Supports generating binary .FIT files.  Header, Message Definition and Message
    /// data may be written.
    /// </summary>
    public class Encode
    {
        #region Fields
        private MesgDefinition[] lastMesgDef = new MesgDefinition[Fit.MaxLocalMesgs];
        private bool open = false;
        private Stream fitDest;
        /// <summary>
        ///  If default ctor is used Header object may be manipulated if desired before Open is called.
        /// </summary>
        public Header header = new Header();
        #endregion // Fields

        #region Properties

        #endregion // Properties

        #region Constructors
        public Encode()
        {
        }

        public Encode(Stream fitDest)
        {
            Open(fitDest);
        }
        #endregion // Constructors

        #region Methods

        public void Open(Stream fitDest)
        {
            this.fitDest = fitDest;
            open = true;

            // Write header so we are ready to append messages
            header.Write(this.fitDest);
        }

        public void OnMesgDefinition(MesgDefinition newMesgDefinition)
        {
            Write(newMesgDefinition);
        }

        public void OnMesg(Mesg newMesg)
        {
            Write(newMesg);
        }

        public void Write(MesgDefinition mesgDefinition)
        {
            if (open == false)
            {
                throw new FitException("Encode:Write - Encode not opened yet, must call Encode:Open()");
            }
            mesgDefinition.Write(fitDest);
            lastMesgDef[mesgDefinition.LocalMesgNum] = mesgDefinition;
        }

        public void Write(Mesg mesg)
        {
            if (open == false)
            {
                throw new FitException("Encode:Write - Encode not opened yet, must call Encode:Open()");
            }
            // Fit file must always contain a defn message before data messages
            if ((lastMesgDef[mesg.LocalNum] == null) || !lastMesgDef[mesg.LocalNum].Supports(mesg))
            {
                Write(new MesgDefinition(mesg));
            }
            mesg.Write(fitDest, lastMesgDef[mesg.LocalNum]);
        }

        public void Write(List<Mesg> mesgs)
        {
            foreach (Mesg mesg in mesgs)
            {
                Write(mesg);
            }
        }

        /// <summary>
        /// Updates the data size and CRC in the file header
        /// Updates file CRC
        /// </summary>
        public void Close()
        {
            if (open == false)
            {
                throw new FitException("Encode:Close - Encode not opened yet, must call Encode:Open()");
            }

            // Rewrites the header now that the datasize is known
            header.DataSize = (uint)(fitDest.Length - header.Size);
            header.UpdateCRC();
            header.Write(fitDest);

            // Compute and write the file CRC to the end of the file
            byte[] data = new byte[fitDest.Length];
            fitDest.Position = 0;
            fitDest.Read(data, 0, data.Length);
            ushort fileCrc = CRC.Calc16(data, data.Length);
            byte[] buffer = BitConverter.GetBytes(fileCrc);
            fitDest.Write(buffer, 0, 2);
        }
        #endregion // Methods
    } // Class
} // namespace