/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * 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 OpenSimulator Project 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 DEVELOPERS ``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 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.Drawing;
using System.IO;
using OpenMetaverse;

namespace OpenSim.Region.Framework.Interfaces
{
    public interface IDynamicTextureManager
    {
        void RegisterRender(string handleType, IDynamicTextureRender render);

        /// <summary>
        /// Used by IDynamicTextureRender implementations to return renders
        /// </summary>
        /// <param name='id'></param>
        /// <param name='data'></param>
        /// <param name='isReuseable'></param>
        void ReturnData(UUID id, IDynamicTexture texture);

        UUID AddDynamicTextureURL(UUID simID, UUID primID, string contentType, string url, string extraParams,
                                    int updateTimer);
        UUID AddDynamicTextureURL(UUID simID, UUID primID, string contentType, string url, string extraParams,
                                   int updateTimer, bool SetBlending, byte AlphaValue);
        UUID AddDynamicTextureURL(UUID simID, UUID primID, string contentType, string url, string extraParams,
                                   int updateTimer, bool SetBlending, int disp, byte AlphaValue, int face);
        UUID AddDynamicTextureData(UUID simID, UUID primID, string contentType, string data, string extraParams,
                                     int updateTimer);

        /// Apply a dynamically generated texture to all sides of the given prim.  The texture is not persisted to the
        /// asset service.
        /// </summary>
        /// <param name="simID">The simulator in which the texture is being generated</param>
        /// <param name="primID">The prim to which to apply the texture.</param>
        /// <param name="contentType">The content type to create.  Current choices are "vector" to create a vector
        /// based texture or "image" to create a texture from an image at a particular URL</param>
        /// <param name="data">The data for the generator</param>
        /// <param name="extraParams">Parameters for the generator that don't form part of the main data.</param>
        /// <param name="updateTimer">If zero, the image is never updated after the first generation.  If positive
        /// the image is updated at the given interval.  Not implemented for </param>
        /// <param name="SetBlending">
        /// If true, the newly generated texture is blended with the appropriate existing ones on the prim
        /// </param>
        /// <param name="AlphaValue">
        /// The alpha value of the generated texture.
        /// </param>
        /// <returns>
        /// The UUID of the texture updater, not the texture UUID.  If you need the texture UUID then you will need
        /// to obtain it directly from the SceneObjectPart.  For instance, if ALL_SIDES is set then this texture
        /// can be obtained as SceneObjectPart.Shape.Textures.DefaultTexture.TextureID
        /// </returns>
        UUID AddDynamicTextureData(UUID simID, UUID primID, string contentType, string data, string extraParams,
                                    int updateTimer, bool SetBlending, byte AlphaValue);

        /// <summary>
        /// Apply a dynamically generated texture to the given prim.
        /// </summary>
        /// <param name="simID">The simulator in which the texture is being generated</param>
        /// <param name="primID">The prim to which to apply the texture.</param>
        /// <param name="contentType">The content type to create.  Current choices are "vector" to create a vector
        /// based texture or "image" to create a texture from an image at a particular URL</param>
        /// <param name="data">The data for the generator</param>
        /// <param name="extraParams">Parameters for the generator that don't form part of the main data.</param>
        /// <param name="updateTimer">If zero, the image is never updated after the first generation.  If positive
        /// the image is updated at the given interval.  Not implemented for </param>
        /// <param name="SetBlending">
        /// If true, the newly generated texture is blended with the appropriate existing ones on the prim
        /// </param>
        /// <param name="disp">
        /// Display flags.  If DISP_EXPIRE then the old texture is deleted if it is replaced by a
        /// newer generated texture (may not currently be implemented).  If DISP_TEMP then the asset is flagged as
        /// temporary, which often means that it is not persisted to the database.
        /// </param>
        /// <param name="AlphaValue">
        /// The alpha value of the generated texture.
        /// </param>
        /// <param name="face">
        /// The face of the prim on which to put the generated texture.  If ALL_SIDES then all sides of the prim are
        /// set
        /// </param>
        /// <returns>
        /// The UUID of the texture updater, not the texture UUID.  If you need the texture UUID then you will need
        /// to obtain it directly from the SceneObjectPart.  For instance, if ALL_SIDES is set then this texture
        /// can be obtained as SceneObjectPart.Shape.Textures.DefaultTexture.TextureID
        /// </returns>
        UUID AddDynamicTextureData(
            UUID simID, UUID primID, string contentType, string data, string extraParams,
            int updateTimer, bool SetBlending, int disp, byte AlphaValue, int face);
        
        void GetDrawStringSize(string contentType, string text, string fontName, int fontSize,
                               out double xSize, out double ySize);
    }

    public interface IDynamicTextureRender
    {
        string GetName();
        string GetContentType();
        bool SupportsAsynchronous();

//        /// <summary>
//        /// Return true if converting the input body and extra params data will always result in the same byte[] array
//        /// </summary>
//        /// <remarks>
//        /// This method allows the caller to use a previously generated asset if it has one.
//        /// </remarks>
//        /// <returns></returns>
//        /// <param name='bodyData'></param>
//        /// <param name='extraParams'></param>
//        bool AlwaysIdenticalConversion(string bodyData, string extraParams);

        IDynamicTexture ConvertUrl(string url, string extraParams);
        IDynamicTexture ConvertData(string bodyData, string extraParams);

        bool AsyncConvertUrl(UUID id, string url, string extraParams);
        bool AsyncConvertData(UUID id, string bodyData, string extraParams);

        void GetDrawStringSize(string text, string fontName, int fontSize, 
                               out double xSize, out double ySize);
    }

    public interface IDynamicTexture
    {
        /// <summary>
        /// Input commands used to generate this data.
        /// </summary>
        /// <remarks>
        /// Null if input commands were not used.
        /// </remarks>
        string InputCommands { get; }

        /// <summary>
        /// Uri used to generate this data.
        /// </summary>
        /// <remarks>
        /// Null if a uri was not used.
        /// </remarks>
        Uri InputUri { get; }

        /// <summary>
        /// Extra input params used to generate this data.
        /// </summary>
        string InputParams { get; }

        /// <summary>
        /// Texture data.
        /// </summary>
        byte[] Data { get; }

        /// <summary>
        /// Size of texture.
        /// </summary>
        Size Size { get; }

        /// <summary>
        /// Signal whether the texture is reuseable (i.e. whether the same input data will always generate the same
        /// texture).
        /// </summary>
        bool IsReuseable { get; }
    }
}