/******************************************************************************
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 Baldur Karlsson
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ******************************************************************************/

#include "vk_test.h"

struct Secondary_CmdBuf : VulkanGraphicsTest
{
  static constexpr const char *Description = "Draw using secondary command buffers";

  std::string common = R"EOSHADER(

#version 420 core

struct v2f
{
	vec4 pos;
	vec4 col;
	vec4 uv;
};

)EOSHADER";

  const std::string vertex = R"EOSHADER(

layout(location = 0) in vec3 Position;
layout(location = 1) in vec4 Color;
layout(location = 2) in vec2 UV;

layout(location = 0) out v2f vertOut;

void main()
{
	vertOut.pos = vec4(Position.xyz*vec3(1,-1,1), 1);
	gl_Position = vertOut.pos;
	vertOut.col = Color;
	vertOut.uv = vec4(UV.xy, 0, 1);
}

)EOSHADER";

  const std::string pixel = R"EOSHADER(

layout(location = 0) in v2f vertIn;

layout(location = 0, index = 0) out vec4 Color;

void main()
{
	Color = vertIn.col;
}

)EOSHADER";

  int main(int argc, char **argv)
  {
    // initialise, create window, create context, etc
    if(!Init(argc, argv))
      return 3;

    VkPipelineLayout layout = createPipelineLayout(vkh::PipelineLayoutCreateInfo());

    VkRect2D size = scissor;

    AllocatedImage img(
        allocator,
        vkh::ImageCreateInfo(size.extent.width, size.extent.height, 0, VK_FORMAT_R8G8B8A8_SRGB,
                             VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT),
        VmaAllocationCreateInfo({0, VMA_MEMORY_USAGE_GPU_ONLY}));

    VkImageView imgview = createImageView(
        vkh::ImageViewCreateInfo(img.image, VK_IMAGE_VIEW_TYPE_2D, VK_FORMAT_R8G8B8A8_SRGB));

    vkh::RenderPassCreator renderPassCreateInfo;

    renderPassCreateInfo.attachments.push_back(
        vkh::AttachmentDescription(VK_FORMAT_R8G8B8A8_SRGB, VK_IMAGE_LAYOUT_UNDEFINED,
                                   VK_IMAGE_LAYOUT_GENERAL, VK_ATTACHMENT_LOAD_OP_CLEAR));

    renderPassCreateInfo.addSubpass({VkAttachmentReference({0, VK_IMAGE_LAYOUT_GENERAL})});
    renderPassCreateInfo.addSubpass({VkAttachmentReference({0, VK_IMAGE_LAYOUT_GENERAL})});

    renderPassCreateInfo.dependencies.push_back(vkh::SubpassDependency(
        0, 1, VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
        VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
        VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT));

    VkRenderPass renderPass = createRenderPass(renderPassCreateInfo);

    VkFramebuffer framebuffer =
        createFramebuffer(vkh::FramebufferCreateInfo(renderPass, {imgview}, size.extent));

    vkh::GraphicsPipelineCreateInfo pipeCreateInfo;

    pipeCreateInfo.layout = layout;
    pipeCreateInfo.renderPass = renderPass;

    pipeCreateInfo.vertexInputState.vertexBindingDescriptions = {vkh::vertexBind(0, DefaultA2V)};
    pipeCreateInfo.vertexInputState.vertexAttributeDescriptions = {
        vkh::vertexAttr(0, 0, DefaultA2V, pos), vkh::vertexAttr(1, 0, DefaultA2V, col),
        vkh::vertexAttr(2, 0, DefaultA2V, uv),
    };

    pipeCreateInfo.stages = {
        CompileShaderModule(common + vertex, ShaderLang::glsl, ShaderStage::vert, "main"),
        CompileShaderModule(common + pixel, ShaderLang::glsl, ShaderStage::frag, "main"),
    };

    pipeCreateInfo.subpass = 0;
    VkPipeline pipe0 = createGraphicsPipeline(pipeCreateInfo);

    setName(pipe0, "Pipeline 0");

    pipeCreateInfo.subpass = 1;
    VkPipeline pipe1 = createGraphicsPipeline(pipeCreateInfo);

    setName(pipe1, "Pipeline 1");

    const DefaultA2V TwoTris[] = {
        {Vec3f(-0.75f, -0.5f, 0.0f), Vec4f(1.0f, 0.0f, 0.0f, 1.0f), Vec2f(0.0f, 0.0f)},
        {Vec3f(-0.25f, 0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 1.0f), Vec2f(0.0f, 1.0f)},
        {Vec3f(0.25f, -0.5f, 0.0f), Vec4f(0.0f, 0.0f, 1.0f, 1.0f), Vec2f(1.0f, 0.0f)},

        {Vec3f(-0.25f, -0.5f, 0.0f), Vec4f(1.0f, 0.0f, 0.0f, 1.0f), Vec2f(0.0f, 0.0f)},
        {Vec3f(0.25f, 0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 1.0f), Vec2f(0.0f, 1.0f)},
        {Vec3f(0.75f, -0.5f, 0.0f), Vec4f(0.0f, 0.0f, 1.0f, 1.0f), Vec2f(1.0f, 0.0f)},
    };

    AllocatedBuffer vb(allocator,
                       vkh::BufferCreateInfo(sizeof(TwoTris), VK_BUFFER_USAGE_VERTEX_BUFFER_BIT |
                                                                  VK_BUFFER_USAGE_TRANSFER_DST_BIT),
                       VmaAllocationCreateInfo({0, VMA_MEMORY_USAGE_CPU_TO_GPU}));

    vb.upload(TwoTris);

    while(Running())
    {
      VkCommandBuffer cmd2 = GetCommandBuffer(VK_COMMAND_BUFFER_LEVEL_SECONDARY);

      vkBeginCommandBuffer(
          cmd2, vkh::CommandBufferBeginInfo(VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT,
                                            vkh::CommandBufferInheritanceInfo(renderPass, 1)));

      vkCmdBindPipeline(cmd2, VK_PIPELINE_BIND_POINT_GRAPHICS, pipe1);
      vkCmdSetViewport(cmd2, 0, 1, &viewport);
      vkCmdSetScissor(cmd2, 0, 1, &size);
      vkh::cmdBindVertexBuffers(cmd2, 0, {vb.buffer}, {sizeof(DefaultA2V) * 3});

      setMarker(cmd2, "Secondary");

      vkCmdDraw(cmd2, 3, 1, 0, 0);

      vkEndCommandBuffer(cmd2);

      VkCommandBuffer cmd = GetCommandBuffer();

      vkBeginCommandBuffer(cmd, vkh::CommandBufferBeginInfo());

      VkImage swapimg =
          StartUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);

      vkCmdClearColorImage(cmd, swapimg, VK_IMAGE_LAYOUT_GENERAL,
                           vkh::ClearColorValue(0.4f, 0.5f, 0.6f, 1.0f), 1,
                           vkh::ImageSubresourceRange());

      vkCmdBeginRenderPass(cmd, vkh::RenderPassBeginInfo(renderPass, framebuffer, size,
                                                         {vkh::ClearValue(0.0f, 0.0f, 0.0f, 1.0f)}),
                           VK_SUBPASS_CONTENTS_INLINE);

      vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, pipe0);
      vkCmdSetViewport(cmd, 0, 1, &viewport);
      vkCmdSetScissor(cmd, 0, 1, &size);
      vkh::cmdBindVertexBuffers(cmd, 0, {vb.buffer}, {0});

      setMarker(cmd, "Primary");

      vkCmdDraw(cmd, 3, 1, 0, 0);

      vkCmdNextSubpass(cmd, VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS);

      vkCmdExecuteCommands(cmd, 1, &cmd2);

      vkCmdEndRenderPass(cmd);

      VkImageBlit region = {};
      region.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
      region.srcSubresource.layerCount = 1;
      region.dstSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
      region.dstSubresource.layerCount = 1;

      vkh::cmdPipelineBarrier(
          cmd, {
                   vkh::ImageMemoryBarrier(VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
                                           VK_ACCESS_TRANSFER_READ_BIT, VK_IMAGE_LAYOUT_GENERAL,
                                           VK_IMAGE_LAYOUT_GENERAL, img.image),
               });

      region.srcOffsets[1].x = size.extent.width;
      region.srcOffsets[1].y = size.extent.height;
      region.srcOffsets[1].z = 1;
      region.dstOffsets[1].x = scissor.extent.width;
      region.dstOffsets[1].y = scissor.extent.height;
      region.dstOffsets[1].z = 1;

      vkCmdBlitImage(cmd, img.image, VK_IMAGE_LAYOUT_GENERAL, swapimg, VK_IMAGE_LAYOUT_GENERAL, 1,
                     &region, VK_FILTER_LINEAR);

      FinishUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);

      vkEndCommandBuffer(cmd);

      Submit(0, 1, {cmd}, {cmd2});

      Present();
    }

    return 0;
  }
};

REGISTER_TEST(Secondary_CmdBuf);