/* 
 * Copyright (c) 2008 Intel Corporation
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * -- Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * -- Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * -- Neither the name of the Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE INTEL OR ITS
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Net;
using System.IO;
using OpenMetaverse;

namespace AssetClient
{
    public static class AssetClient
    {
        const string ASSET_SERVER_URL = "http://localhost:9001";

        public static bool TryGetAsset(UUID assetID, string assetURL, out Asset asset)
        {
            asset = null;

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(assetURL);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                if (response.StatusCode == HttpStatusCode.OK)
                {
                    int contentLength = (int)response.ContentLength;
                    byte[] assetData = new byte[contentLength];
                    BinaryReader reader = new BinaryReader(response.GetResponseStream());
                    int pos = 0;

                    // Loop until we have read all of the bytes from the response stream
                    while (pos < contentLength)
                        pos += reader.Read(assetData, pos, contentLength - pos);

                    reader.Close();

                    switch (response.ContentType)
                    {
                        case "image/jp2":
                            asset = new AssetTexture(assetID, assetData);
                            if (((AssetTexture)asset).DecodeLayerBoundaries())
                                return true;
                            else
                                Logger.Log("Failed to decode texture layer boundaries", Helpers.LogLevel.Error);
                            break;
                        case "audio/ogg":
                            asset = new AssetSound(assetID, assetData);
                            return true;
                        default:
                            Logger.Log("Unhandled asset content type: " + response.ContentType, Helpers.LogLevel.Error);
                            break;
                    }
                }
            }
            catch (Exception ex)
            {
                Logger.Log(ex.Message, Helpers.LogLevel.Error, ex);
            }

            return false;
        }

        public static bool TryGetMetadata(UUID assetID, out byte[] metadata)
        {
            return TryGetMetadata(assetID, ASSET_SERVER_URL, out metadata);
        }

        public static bool TryGetMetadata(UUID assetID, string assetServerURL, out byte[] metadata)
        {
            metadata = null;
            assetServerURL = assetServerURL.TrimEnd('/');
            string requestURL = String.Format("{0}/{1}/metadata", assetServerURL, assetID);

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestURL);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                if (response.StatusCode == HttpStatusCode.OK)
                {
                    int contentLength = (int)response.ContentLength;
                    metadata = new byte[contentLength];
                    BinaryReader reader = new BinaryReader(response.GetResponseStream());
                    int pos = 0;

                    // Loop until we have read all of the bytes from the response stream
                    while (pos < contentLength)
                        pos += reader.Read(metadata, pos, contentLength - pos);

                    reader.Close();
                    return true;
                }
            }
            catch (Exception ex)
            {
                Logger.Log(ex.Message, Helpers.LogLevel.Error, ex);
            }

            return false;
        }

        public static UUID CreateAsset(Asset asset)
        {
            // FIXME: Implement this
            return UUID.Zero;
        }
    }
}