/*
  Copyright 2010 Larry Gritz and the other authors and contributors.
  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 software's owners 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 COPYRIGHT
  OWNER OR 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.

  (This is the Modified BSD License)
*/


/////////////////////////////////////////////////////////////////////////////
// Private definitions internal to the socket.imageio plugin
/////////////////////////////////////////////////////////////////////////////


#pragma once

#include <map>
#include <memory>

#include <OpenImageIO/imageio.h>


// The boost::asio library uses functionality only available since Windows XP,
// thus _WIN32_WINNT must be set to _WIN32_WINNT_WINXP (0x0501) or greater.
// If _WIN32_WINNT is not defined before including the asio headers, they issue
// a message warning that _WIN32_WINNT was explicitly set to _WIN32_WINNT_WINXP.
#if defined(_WIN32) && !defined(_WIN32_WINNT)
#    define _WIN32_WINNT 0x0501
#endif

#include <boost/asio.hpp>


OIIO_PLUGIN_NAMESPACE_BEGIN

using namespace boost::asio;



class SocketOutput final : public ImageOutput {
public:
    SocketOutput();
    virtual ~SocketOutput() { close(); }
    virtual const char* format_name(void) const override { return "socket"; }
    virtual int supports(string_view property) const override;
    virtual bool open(const std::string& name, const ImageSpec& spec,
                      OpenMode mode = Create) override;
    virtual bool write_scanline(int y, int z, TypeDesc format, const void* data,
                                stride_t xstride) override;
    virtual bool write_tile(int x, int y, int z, TypeDesc format,
                            const void* data, stride_t xstride,
                            stride_t ystride, stride_t zstride) override;
    virtual bool close() override;
    virtual bool copy_image(ImageInput* in) override;

private:
    int m_next_scanline;  // Which scanline is the next to write?
    io_service io;
    ip::tcp::socket socket;
    std::vector<unsigned char> m_scratch;

    bool connect_to_server(const std::string& name);
    bool send_spec_to_server(const ImageSpec& spec);
};



class SocketInput final : public ImageInput {
public:
    SocketInput();
    virtual ~SocketInput() { close(); }
    virtual const char* format_name(void) const override { return "socket"; }
    virtual bool valid_file(const std::string& filename) const override;
    virtual bool open(const std::string& name, ImageSpec& spec) override;
    virtual bool open(const std::string& name, ImageSpec& spec,
                      const ImageSpec& config) override;
    virtual bool read_native_scanline(int subimage, int miplevel, int y, int z,
                                      void* data) override;
    virtual bool read_native_tile(int subimage, int miplevel, int x, int y,
                                  int z, void* data) override;
    virtual bool close() override;

private:
    int m_next_scanline;  // Which scanline is the next to read?
    io_service io;
    ip::tcp::socket socket;
    std::shared_ptr<ip::tcp::acceptor> acceptor;

    bool accept_connection(const std::string& name);
    bool get_spec_from_client(ImageSpec& spec);

    friend class SocketOutput;
};

namespace socket_pvt {

const char default_port[] = "10110";

const char default_host[] = "127.0.0.1";

std::size_t
socket_write(ip::tcp::socket& s, TypeDesc& type, const void* data, int size);

}  // namespace socket_pvt

OIIO_PLUGIN_NAMESPACE_END