#include "main_code.h"

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

#include "include/Engine.h"

#include "main_code.h"

TMyApplication* Application;

//static const float BUFFER_DISTANCE = 30.f;
static const float BUFFER_DISTANCE = 50.f;


TRenderPair linesToRenderBoxes(const std::vector<std::pair<Vector2f, Vector2f>>& lineArr)
{
	TRenderPair pair;

	for (size_t i = 0; i < lineArr.size(); i++)
	{

		Vector2f startPoint = lineArr[i].first;
		Vector2f endPoint = lineArr[i].second;

		Vector2f renderAreaStart{ std::min<float>(startPoint(0), endPoint(0)) - BUFFER_DISTANCE, std::min<float>(startPoint(1), endPoint(1)) - BUFFER_DISTANCE };

		Vector2f renderAreEnd{ std::max<float>(startPoint(0), endPoint(0)) + BUFFER_DISTANCE, std::max<float>(startPoint(1), endPoint(1)) + BUFFER_DISTANCE };

		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreaStart(0), renderAreaStart(1), 0));
		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreaStart(0), renderAreEnd(1), 0));
		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreEnd(0), renderAreEnd(1), 0));
		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreaStart(0), renderAreaStart(1), 0));
		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreEnd(0), renderAreEnd(1), 0));
		pair.second.Data.Vec3CoordArr[CONST_STRING_POSITION_ATTRIB].push_back(Vector3f(renderAreEnd(0), renderAreaStart(1), 0));


		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));
		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));
		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));
		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));
		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));
		pair.second.Data.Vec4CoordArr[CONST_STRING_COLOR_ATTRIB].push_back(Vector4f(1, 0, 0, 1));

		Vector2f lineVec = endPoint - startPoint;
		Vector2f lineNormVec = { -lineVec(1), lineVec(0) };

		lineNormVec.normalize();

		//float distance = abs(normVec.x*(position.x - startPoint.x) + normVec.y*(position.y - startPoint.y));
		//distance = a*x + b*y + c, here we calculate a, b,c and pass them to shader
		float a = lineNormVec(0);
		float b = lineNormVec(1);
		float c = -(lineNormVec(0)*startPoint(0) + lineNormVec(1)*startPoint(1));

		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		pair.second.Data.Vec3CoordArr["vLineParams"].push_back(Vector3f(a, b, c));
		
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		pair.second.Data.Vec4CoordArr["vStartPointEndPoint"].push_back(Vector4f(startPoint(0), startPoint(1), endPoint(0), endPoint(1)));
		
		
	}

	pair.second.RefreshBuffer();
	
	return pair;
}



void TMyApplication::InnerInit()
{

    Application = this;
    
#ifdef TARGET_WIN32
#ifdef NDEBUG
	ST::PathToResources = "resources/";
#else
	ST::PathToResources = "../../../assets/";
#endif
#endif
    
#ifdef TARGET_IOS
    ST::PathToResources = "assets/";
#endif

    if (Console != NULL)
    {
        *Console<<"APP INIT\n";
    }
    srand (static_cast<size_t>(time(NULL)));

	//ResourceManager->ShaderManager.AddShader("DefaultShader", "shader1vertex.txt", "shader1fragment.txt");
	//ResourceManager->ShaderManager.AddShader("ColorShader", "color_vertex.txt", "color_fragment.txt");

#ifdef USE_SHADER_X16
	ResourceManager->ShaderManager.AddShader("AntialiasingShader", "ms_vertex.txt", "ms_fragment_x16.txt");
#else
	ResourceManager->ShaderManager.AddShader("AntialiasingShader", "ms_vertex.txt", "ms_fragment.txt");
#endif
	
	


	//Renderer->PushShader("DefaultShader");

	ResourceManager->TexList.AddTexture("console_bkg.bmp");

	
	Renderer->PushShader("AntialiasingShader");


	std::vector<std::pair<Vector2f, Vector2f>> lineArr;

	for (int i = 0; i < 10; i++)
	{
		lineArr.push_back({ {50.f + i * 20.f, 50.f}, { 60.f + i * 20.f, 440.f } });

		lineArr.push_back({ { 60.f + i * 20.f, 440.f },{ 70.f + i * 20.f, 50.f } });
	};



	lineRenderPair = linesToRenderBoxes(lineArr);

	Renderer->SetOrthoProjection();

	Renderer->SetFullScreenViewport();
	
	Inited = true;





}

void TMyApplication::InnerDeinit()
{
    Inited = false;
    Loaded = false;
    if (Console != NULL)
    {
        *Console<<"APP DEINIT\n";
    }
}

void TMyApplication::InnerOnTapDown(Vector2f p)
{

}

void TMyApplication::InnerOnTapUp(Vector2f p)
{

}

void TMyApplication::InnerOnTapUpAfterMove(Vector2f p)
{

}

void TMyApplication::InnerOnMove(Vector2f p, Vector2f shift)
{

}
	
void TMyApplication::OnFling(Vector2f v) 
{
}

	
void TMyApplication::InnerDraw()
{

	//Render the frame
	Renderer->PushShader("AntialiasingShader");

	Renderer->SetProjectionMatrix(512.f, 512.f);

	glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
	glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
	CheckGlError("");


	EnableVertexAttribArray("vLineParams");
	EnableVertexAttribArray("vStartPointEndPoint");

	TRenderParamsSetter params(lineRenderPair.first);
	Renderer->DrawTriangleList(lineRenderPair.second);

	DisableVertexAttribArray("vStartPointEndPoint");
	DisableVertexAttribArray("vLineParams");

	Renderer->PopShader();

	CheckGlError("");

	
}


void TMyApplication::InnerUpdate(size_t dt)
{

}

bool TMyApplication::IsLoaded()
{
    return Loaded;
}

bool TMyApplication::IsInited()
{
    return Inited;
}