#include "fgui/fgui.h"
#include "filesystem.h"
#include "rendering.h"
#include "tier1/utlvector.h"
#include "fgui/widget.h"


IGraphicsPipeline *fgui_RectPipeline;
IGraphicsPipeline *fgui_TextPipeline;

void IFGUI::Init( void )
{

}

void IFGUI::Frame( void )
{

}

CUtlVector<CFGUI_Widget*> fgui_widgets;
void IFGUI::AppendWidget( CFGUI_Widget *pWidget )
{
	fgui_widgets.AppendTail(pWidget);
}

void IFGUI::DestroyWidget( CFGUI_Widget *pWidget )
{

}

void IFGUI::SetRectColor( float r, float g, float b, float a )
{

}

void IFGUI::DrawRect( int32_t iPosX, int32_t iPosY, uint32_t uSizeX, uint32_t uSizeY )
{

}

CUtlVector<CFont*> fgui_fonts;
CFont *fgui_pCurrentFont;

CFont *IFGUI::LoadFont( CUtlString szFontPath )
{
	for (auto &font: fgui_fonts)
	{
		if (font->szName == szFontPath)
			return font;
	};
	CFont *pFont = new CFont;
	pFont->szName = szFontPath;
	pFont->pTexture = ITextureManager::LoadTexture(CUtlString("%s.png", szFontPath.GetString()));
	FileHandle_t f = IFileSystem::Open(CUtlString("%s.fontdata", szFontPath.GetString()), IFILE_READ);
	CUtlBuffer<char> b = IFileSystem::Size(f)+1;
	IFileSystem::Read(f, b.GetMemory(), IFileSystem::Size(f));
	IFileSystem::Close(f);
	char cCharacterSet[256] = {};
	uint32_t nElementsWidth;
	uint32_t nElementsHeight;
	V_sscanf(b, "%u %u %255s", &nElementsWidth, &nElementsHeight, cCharacterSet);
	V_printf("%i %i\n", nElementsWidth, nElementsHeight);
	return pFont;
}

void IFGUI::SetTextFont( CFont *pFont )
{

}

void IFGUI::SetTextPos( float x, float y )
{

}

void IFGUI::SetTextColor( float r, float g, float b, float a )
{

}

void IFGUI::DrawText( CUtlString psz )
{

}

class CFGUI_Rendering: public IRenderingPipelineStep
{
public:
	virtual void Init() override;
	virtual void Frame( float fDelta ) override;
	virtual void Deinit() override;
};
DECLARE_UI_RENDERING_STAGE(CFGUI_Rendering, fgui_rendering);

void CFGUI_Rendering::Init()
{
	fgui_RectPipeline = IRenderer::CreateGraphicsPipeline(
		{
		{"gfx/fgui_rect_vert.shader", SHADER_TYPE_VERTEX},
		{"gfx/fgui_rect_frag.shader", SHADER_TYPE_FRAGMENT},
		},
		{}, 
		24,
		8,
		{{0,0,EVertexFormat::VERTEX_FORMAT_X32Y32}},
		{EImageFormat::IMAGE_FORMAT_R8G8B8A8},
		true
	);	
	fgui_TextPipeline = IRenderer::CreateGraphicsPipeline(
		{
		{"gfx/fgui_text_vert.shader", SHADER_TYPE_VERTEX},
		{"gfx/fgui_text_frag.shader", SHADER_TYPE_FRAGMENT},
		},
		{
			{SHADER_INPUT_TYPE_TEXTURES, 0},
		}, 
		25,
		8,
		{{0,0,EVertexFormat::VERTEX_FORMAT_X32Y32}},
		{EImageFormat::IMAGE_FORMAT_R8G8B8A8},
		true
	);	
};

void CFGUI_Rendering::Frame( float fDelta )
{
	IRenderer::ResetState();
	IRenderer::SetDepthMode(DEPTH_MODE_LESS);
	for (auto &widget: fgui_widgets)
	{
		widget->Draw();
	}
};

void CFGUI_Rendering::Deinit()
{

};