#pragma once

#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <sstream>

#include "cl.hpp"

#pragma warning( disable : 4996 )

void WriteTGA_RGB(const char* filename, unsigned char* data, unsigned int width, unsigned int height)
{
	FILE *f = fopen(filename, "wb");
	if (!f) {
		fprintf(stderr, "Unable to create output TGA image `%s'\n", filename);
		exit(EXIT_FAILURE);
	}

	fputc(0x00, f); /* ID Length, 0 => No ID        */
	fputc(0x00, f); /* Color Map Type, 0 => No color map included   */
	fputc(0x02, f); /* Image Type, 2 => Uncompressed, True-color Image */
	fputc(0x00, f); /* Next five bytes are about the color map entries */
	fputc(0x00, f); /* 2 bytes Index, 2 bytes length, 1 byte size */
	fputc(0x00, f);
	fputc(0x00, f);
	fputc(0x00, f);
	fputc(0x00, f); /* X-origin of Image    */
	fputc(0x00, f);
	fputc(0x00, f); /* Y-origin of Image    */
	fputc(0x00, f);
	fputc(width & 0xff, f); /* Image Width      */
	fputc((width >> 8) & 0xff, f);
	fputc(height & 0xff, f); /* Image Height     */
	fputc((height >> 8) & 0xff, f);
	fputc(0x18, f); /* Pixel Depth, 0x18 => 24 Bits */
	fputc(0x20, f); /* Image Descriptor     */

	for (int y = height - 1; y >= 0; y--) {
		for (size_t x = 0; x < width; x++) {
			const size_t i = (y * width + x) * 3;
			fputc(data[i + 2], f); /* write blue */
			fputc(data[i + 1], f); /* write green */
			fputc(data[i], f); /* write red */
		}
	}
}

std::string FileToString(const std::string& path) {
	std::ifstream file(path, std::ios::in | std::ios::binary);
	if (file)
	{
		std::ostringstream contents;
		contents << file.rdbuf();
		file.close();
		return(contents.str());
	}
	return std::string();
	
}

const char *getErrorString(cl_int error)
{
	switch (error) {
		// run-time and JIT compiler errors
	case 0: return "CL_SUCCESS";
	case -1: return "CL_DEVICE_NOT_FOUND";
	case -2: return "CL_DEVICE_NOT_AVAILABLE";
	case -3: return "CL_COMPILER_NOT_AVAILABLE";
	case -4: return "CL_MEM_OBJECT_ALLOCATION_FAILURE";
	case -5: return "CL_OUT_OF_RESOURCES";
	case -6: return "CL_OUT_OF_HOST_MEMORY";
	case -7: return "CL_PROFILING_INFO_NOT_AVAILABLE";
	case -8: return "CL_MEM_COPY_OVERLAP";
	case -9: return "CL_IMAGE_FORMAT_MISMATCH";
	case -10: return "CL_IMAGE_FORMAT_NOT_SUPPORTED";
	case -11: return "CL_BUILD_PROGRAM_FAILURE";
	case -12: return "CL_MAP_FAILURE";
	case -13: return "CL_MISALIGNED_SUB_BUFFER_OFFSET";
	case -14: return "CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST";
	case -15: return "CL_COMPILE_PROGRAM_FAILURE";
	case -16: return "CL_LINKER_NOT_AVAILABLE";
	case -17: return "CL_LINK_PROGRAM_FAILURE";
	case -18: return "CL_DEVICE_PARTITION_FAILED";
	case -19: return "CL_KERNEL_ARG_INFO_NOT_AVAILABLE";

		// compile-time errors
	case -30: return "CL_INVALID_VALUE";
	case -31: return "CL_INVALID_DEVICE_TYPE";
	case -32: return "CL_INVALID_PLATFORM";
	case -33: return "CL_INVALID_DEVICE";
	case -34: return "CL_INVALID_CONTEXT";
	case -35: return "CL_INVALID_QUEUE_PROPERTIES";
	case -36: return "CL_INVALID_COMMAND_QUEUE";
	case -37: return "CL_INVALID_HOST_PTR";
	case -38: return "CL_INVALID_MEM_OBJECT";
	case -39: return "CL_INVALID_IMAGE_FORMAT_DESCRIPTOR";
	case -40: return "CL_INVALID_IMAGE_SIZE";
	case -41: return "CL_INVALID_SAMPLER";
	case -42: return "CL_INVALID_BINARY";
	case -43: return "CL_INVALID_BUILD_OPTIONS";
	case -44: return "CL_INVALID_PROGRAM";
	case -45: return "CL_INVALID_PROGRAM_EXECUTABLE";
	case -46: return "CL_INVALID_KERNEL_NAME";
	case -47: return "CL_INVALID_KERNEL_DEFINITION";
	case -48: return "CL_INVALID_KERNEL";
	case -49: return "CL_INVALID_ARG_INDEX";
	case -50: return "CL_INVALID_ARG_VALUE";
	case -51: return "CL_INVALID_ARG_SIZE";
	case -52: return "CL_INVALID_KERNEL_ARGS";
	case -53: return "CL_INVALID_WORK_DIMENSION";
	case -54: return "CL_INVALID_WORK_GROUP_SIZE";
	case -55: return "CL_INVALID_WORK_ITEM_SIZE";
	case -56: return "CL_INVALID_GLOBAL_OFFSET";
	case -57: return "CL_INVALID_EVENT_WAIT_LIST";
	case -58: return "CL_INVALID_EVENT";
	case -59: return "CL_INVALID_OPERATION";
	case -60: return "CL_INVALID_GL_OBJECT";
	case -61: return "CL_INVALID_BUFFER_SIZE";
	case -62: return "CL_INVALID_MIP_LEVEL";
	case -63: return "CL_INVALID_GLOBAL_WORK_SIZE";
	case -64: return "CL_INVALID_PROPERTY";
	case -65: return "CL_INVALID_IMAGE_DESCRIPTOR";
	case -66: return "CL_INVALID_COMPILER_OPTIONS";
	case -67: return "CL_INVALID_LINKER_OPTIONS";
	case -68: return "CL_INVALID_DEVICE_PARTITION_COUNT";

		// extension errors
	case -1000: return "CL_INVALID_GL_SHAREGROUP_REFERENCE_KHR";
	case -1001: return "CL_PLATFORM_NOT_FOUND_KHR";
	case -1002: return "CL_INVALID_D3D10_DEVICE_KHR";
	case -1003: return "CL_INVALID_D3D10_RESOURCE_KHR";
	case -1004: return "CL_D3D10_RESOURCE_ALREADY_ACQUIRED_KHR";
	case -1005: return "CL_D3D10_RESOURCE_NOT_ACQUIRED_KHR";
	default: return "Unknown OpenCL error";
	}
}

bool CheckCLError(cl_int err)
{
	if(err != CL_SUCCESS)
	{
		std::cout << "OpenCL error: " << getErrorString(err) << std::endl;
		return false;
	}

	return true;
}