/*
	GWEN
	Copyright (c) 2010 Facepunch Studios
	See license in Gwen.h
*/

#include "Gwen/Gwen.h"
#include "Gwen/BaseRender.h"
#include "Gwen/Utility.h"
#include "Gwen/Platform.h"

#include <math.h>

#include <cmath>

namespace Gwen
{
namespace Renderer
{
Base::Base()
{
	m_RenderOffset = Gwen::Point(0, 0);
	m_fScale = 1.0f;
}

Base::~Base()
{
	if (GetCTT())
		GetCTT()->ShutDown();
}

void Base::RenderText(Gwen::Font* pFont, Gwen::Point pos, const Gwen::String& text)
{
	Gwen::UnicodeString str = Gwen::Utility::StringToUnicode(text);
	RenderText(pFont, pos, str);
}

Gwen::Point Base::MeasureText(Gwen::Font* pFont, const Gwen::String& text)
{
	Gwen::UnicodeString str = Gwen::Utility::StringToUnicode(text);
	return MeasureText(pFont, str);
}

void Base::DrawLinedRect(Gwen::Rect rect)
{
	DrawFilledRect(Gwen::Rect(rect.x, rect.y, rect.w, 1));
	DrawFilledRect(Gwen::Rect(rect.x, rect.y + rect.h - 1, rect.w, 1));

	DrawFilledRect(Gwen::Rect(rect.x, rect.y, 1, rect.h));
	DrawFilledRect(Gwen::Rect(rect.x + rect.w - 1, rect.y, 1, rect.h));
};

void Base::DrawPixel(int x, int y)
{
	DrawFilledRect(Gwen::Rect(x, y, 1, 1));
}

void Base::DrawShavedCornerRect(Gwen::Rect rect, bool bSlight)
{
	// Draw INSIDE the w/h.
	rect.w -= 1;
	rect.h -= 1;

	if (bSlight)
	{
		DrawFilledRect(Gwen::Rect(rect.x + 1, rect.y, rect.w - 1, 1));
		DrawFilledRect(Gwen::Rect(rect.x + 1, rect.y + rect.h, rect.w - 1, 1));

		DrawFilledRect(Gwen::Rect(rect.x, rect.y + 1, 1, rect.h - 1));
		DrawFilledRect(Gwen::Rect(rect.x + rect.w, rect.y + 1, 1, rect.h - 1));
		return;
	}

	DrawPixel(rect.x + 1, rect.y + 1);
	DrawPixel(rect.x + rect.w - 1, rect.y + 1);

	DrawPixel(rect.x + 1, rect.y + rect.h - 1);
	DrawPixel(rect.x + rect.w - 1, rect.y + rect.h - 1);

	DrawFilledRect(Gwen::Rect(rect.x + 2, rect.y, rect.w - 3, 1));
	DrawFilledRect(Gwen::Rect(rect.x + 2, rect.y + rect.h, rect.w - 3, 1));

	DrawFilledRect(Gwen::Rect(rect.x, rect.y + 2, 1, rect.h - 3));
	DrawFilledRect(Gwen::Rect(rect.x + rect.w, rect.y + 2, 1, rect.h - 3));
}

void Base::Translate(int& x, int& y)
{
	x += m_RenderOffset.x;
	y += m_RenderOffset.y;

	x = std::ceil(((float)x) * m_fScale);
	y = std::ceil(((float)y) * m_fScale);
}

void Base::Translate(Gwen::Rect& rect)
{
	Translate(rect.x, rect.y);

	rect.w = std::ceil(((float)rect.w) * m_fScale);
	rect.h = std::ceil(((float)rect.h) * m_fScale);
}

void Gwen::Renderer::Base::SetClipRegion(Gwen::Rect rect)
{
	m_rectClipRegion = rect;
}

void Base::AddClipRegion(Gwen::Rect rect)
{
	rect.x = m_RenderOffset.x;
	rect.y = m_RenderOffset.y;

	Gwen::Rect out = rect;
	if (rect.x < m_rectClipRegion.x)
	{
		out.w -= (m_rectClipRegion.x - out.x);
		out.x = m_rectClipRegion.x;
	}

	if (rect.y < m_rectClipRegion.y)
	{
		out.h -= (m_rectClipRegion.y - out.y);
		out.y = m_rectClipRegion.y;
	}

	if (rect.x + rect.w > m_rectClipRegion.x + m_rectClipRegion.w)
	{
		out.w = (m_rectClipRegion.x + m_rectClipRegion.w) - out.x;
	}

	if (rect.y + rect.h > m_rectClipRegion.y + m_rectClipRegion.h)
	{
		out.h = (m_rectClipRegion.y + m_rectClipRegion.h) - out.y;
	}

	m_rectClipRegion = out;
}

const Gwen::Rect& Base::ClipRegion() const
{
	return m_rectClipRegion;
}

bool Base::ClipRegionVisible()
{
	if (m_rectClipRegion.w <= 0 || m_rectClipRegion.h <= 0)
		return false;

	return true;
}

void Base::DrawMissingImage(Gwen::Rect pTargetRect)
{
	SetDrawColor(Colors::Red);
	DrawFilledRect(pTargetRect);
}

/*
			If they haven't defined these font functions in their renderer code
			we just draw some rects where the letters would be to give them an idea.
		*/

void Base::RenderText(Gwen::Font* pFont, Gwen::Point pos, const Gwen::UnicodeString& text)
{
	float fSize = pFont->size * Scale();

	for (float i = 0; i < text.length(); i++)
	{
		wchar_t chr = text[i];

		if (chr == ' ') continue;

		Gwen::Rect r(pos.x + i * fSize * 0.4, pos.y, fSize * 0.4 - 1, fSize);

		/*
					This isn't important, it's just me messing around changing the
					shape of the rect based on the letter.. just for fun.
				*/
		if (chr == 'l' || chr == 'i' || chr == '!' || chr == 't')
		{
			r.w = 1;
		}
		else if (chr >= 'a' && chr <= 'z')
		{
			r.y += fSize * 0.5f;
			r.h -= fSize * 0.4f;
		}
		else if (chr == '.' || chr == ',')
		{
			r.x += 2;
			r.y += r.h - 2;
			r.w = 2;
			r.h = 2;
		}
		else if (chr == '\'' || chr == '`' || chr == '"')
		{
			r.x += 3;
			r.w = 2;
			r.h = 2;
		}

		if (chr == 'o' || chr == 'O' || chr == '0')
			DrawLinedRect(r);
		else
			DrawFilledRect(r);
	}
}

Gwen::Point Base::MeasureText(Gwen::Font* pFont, const Gwen::UnicodeString& text)
{
	Gwen::Point p;
	p.x = pFont->size * Scale() * (float)text.length() * 0.4;
	p.y = pFont->size * Scale();

	return p;
}
}  // namespace Renderer
}  // namespace Gwen