#include "vkn/backend.h"
#include "vkn/vulkan_api.h"
#include "vkn/thread/command_worker.h"
#include "zlog.h"
namespace vkn {
	void VulkanContext::SetScissor(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
	{
		VkRect2D scissor = {
			.offset{ .x = (int32_t)x, .y = (int32_t)y},
			.extent {.width = width,.height = height}
		};
		vkCmdSetScissor(command, 0, 1, &scissor);
	}
	void VulkanContext::SetViewport(float x, float y, float width, float height, float min_depth, float max_depth)
	{
		VkViewport viewport = {
			.x = x,
			.y = y,
			.width = width,
			.height = height,
			.minDepth = min_depth,
			.maxDepth = max_depth
		};
		vkCmdSetViewport(command, 0, 1, &viewport);
	}
	void VulkanContext::BindIndexBuffer(BufferDesc desc, uint32_t index_stride)
	{
		VkIndexType vk_index_type =
			(sizeof(uint16_t) == index_stride) ?
			VK_INDEX_TYPE_UINT16 : ((sizeof(uint8_t) == index_stride) ? VK_INDEX_TYPE_UINT8_EXT : VK_INDEX_TYPE_UINT32);
		vkCmdBindIndexBuffer(command, (VkBuffer)desc.buffer, 0, vk_index_type);
	}
	void VulkanContext::BindVertexBuffer(BufferDesc desc)
	{
		VkBuffer vertexBuffers[] = { (VkBuffer)desc.buffer };
		VkDeviceSize offsets[] = { 0 };
		vkCmdBindVertexBuffers(command, 0, 1, vertexBuffers, offsets);
	}
	void VulkanContext::BindVertexBuffers(uint32_t buffer_count, const BufferDesc* descs, const uint32_t* offsets)
	{
		VkBuffer vkBuffers[MAX_BUFFER_BIND_NUM] = { 0 };
		VkDeviceSize vkOffsets[MAX_BUFFER_BIND_NUM] = { 0 };
		for (uint32_t i = 0; i < buffer_count; i++) {
			vkBuffers[i] = (VkBuffer)descs[i].buffer;
			vkOffsets[i] = offsets[i];
		}
		vkCmdBindVertexBuffers(command, 0, buffer_count, vkBuffers, vkOffsets);
	}
	void VulkanContext::DrawIndexed(uint32_t index_count, uint32_t first_index, uint32_t first_vertex)
	{
		vkCmdDrawIndexed(command, index_count, 1, first_index, first_vertex, 0);
	}
	void VulkanContext::ExecuteSurfaceBarriers(const ResourceBarrierDesc& desc)
	{
		BeginRecord(VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT);
		VulkanAPI::Ptr()->ExecuteResourceBarriers(desc);
		EndRecord(Backend::RenderWorker->GetQueue().Ptr());
	}
	void VulkanContext::BeginRecord(VkCommandBufferUsageFlags flag)
	{
		VkCommandBufferBeginInfo beginInfo{
			VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,//sType
			nullptr,									//pNext
			flag									    //flags
		};
		vkBeginCommandBuffer(surfaceCommand, &beginInfo);
	}

	void VulkanContext::EndRecord(VkQueue queue)
	{
		vkEndCommandBuffer(surfaceCommand);
		VkPipelineStageFlags waitStages[] = { VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT };  // 等待渲染阶段
		VkSemaphore waitSemaphores[] = { graphSemaphore ? graphSemaphore : surfaceSemaphore };
		VkSemaphore signalSemaphores[] = { presentSemaphore };// 渲染完成信号量
		VkSubmitInfo submitInfo{};
		submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
		submitInfo.commandBufferCount = 1;
		submitInfo.pCommandBuffers = &surfaceCommand;

		submitInfo.waitSemaphoreCount = 1;
		submitInfo.pWaitSemaphores = waitSemaphores;
		submitInfo.pWaitDstStageMask = waitStages;

		submitInfo.signalSemaphoreCount = 1;
		submitInfo.pSignalSemaphores = signalSemaphores;
		//zlog::info("-----wait {:#x}", (uintptr_t)waitSemaphores[0]);
		//zlog::info("+++++sign {:#x}", (uintptr_t)signalSemaphores[0]);
		vkQueueSubmit(queue, 1, &submitInfo, surfaceFence);
		graphSemaphore = presentSemaphore;
	}
}