/*
Copyright (C) 2007, 2010 - Bit-Blot

This file is part of Aquaria.

Aquaria is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#include "BitmapFont.h"
#include "Core.h"
//#include "DSQ.h"

using namespace glfont;

BmpFont::BmpFont()
{
	scale = 1;
	loaded = false;
	overrideTexture = 0;
	fontTopColor = Vector(1,1,1);
	fontBtmColor = Vector(1,1,1);
}

BmpFont::~BmpFont()
{
	destroy();
}

void BmpFont::destroy()
{
	if (loaded)
	{
		font.Destroy();
		loaded = false;
	}
	if (overrideTexture)
	{
		overrideTexture->removeRef();
		overrideTexture = 0;
	}
}

void BmpFont::load(const std::string &file, float scale, bool loadTexture)
{
	if (loaded)
		font.Destroy();

	this->scale = scale;

#ifdef BBGE_BUILD_OPENGL
	GLuint id=0;
	glGenTextures(1, &id);

	if (!font.Create(file.c_str(), id, loadTexture))
		return;

#endif

	loaded = true;
}

Texture *fontTextureTest = 0;
BitmapText::BitmapText(BmpFont *bmpFont)
{
	this->bmpFont = bmpFont;
	bfePass =0;
	bfe = BFE_NONE;

	currentScrollLine = currentScrollChar = 0;
	scrollDelay = 0;
	scrolling = false;
	align = ALIGN_CENTER;
	textWidth = 600;
	this->fontDrawSize = 24;
	//color = Vector(0.5,0.5,1);
	cull = false;
	//setTexture(font);

	alignWidth = 0;

	//fontTextureTest = core->addTexture("font");
}

void BitmapText::autoKern()
{
}

void BitmapText::loadSpacingMap(const std::string &file)
{
	spacingMap.clear();
	InStream inFile(file.c_str());
	std::string line;
	while (std::getline(inFile, line))
	{
		if (!line.empty())
		{
			char c = line[0];
			line = line.substr(2, line.length());
			std::istringstream is(line);
			is >> spacingMap[c];
		}
	}
}

int BitmapText::getWidthOnScreen()
{
	return text.size()*(fontDrawSize/2);
}

void BitmapText::setAlign(Align align)
{
	this->align = align;
}

std::string BitmapText::getText()
{
	return this->text;
}

void BitmapText::setText(const std::string &text)
{
	this->text = text;
	formatText();
}

void BitmapText::setWidth(int width)
{
	textWidth = width;
}

int BitmapText::getSetWidth()
{
	return textWidth;
}

float BitmapText::getHeight()
{
	float sz = bmpFont->font.GetCharHeight('A') * bmpFont->scale;
	return lines.size()*sz;
}

void BitmapText::formatText()
{
	std::string text;
	text = this->text;
	lines.clear();
	std::string currentLine;
	int lastSpace = -1;
	int currentWidth = 0;
	alignWidth = 0;
	for (int i = 0; i < text.size(); i++)
	{		
		//currentWidth += spacingMap[text[i]]*fontDrawSize;
		float sz = bmpFont->font.GetCharWidth(text[i])*bmpFont->scale;
		currentWidth += sz;

		if (currentWidth+sz >= textWidth || text[i] == '\n')
		{
			if (text[i] == '\n')
			{
				lastSpace = i;
			}
			lines.push_back(text.substr(0, lastSpace));
			int tsz = text.size();
			text = text.substr(lastSpace+1, tsz);
			i = 0;
			alignWidth = currentWidth;
			currentWidth = 0;
			lastSpace = 0;
			continue;
		}

		if (text[i] == ' ')
		{
			lastSpace = i;
		}		
	}
	if (alignWidth == 0)
		alignWidth = currentWidth;
	if (!text.empty() && (text.size() > 1 || text[0] != ' '))
	{
		lines.push_back(text);
	}
	colorIndices.clear();
}

void BitmapText::setBitmapFontEffect(BitmapFontEffect bfe)
{
	this->bfe = bfe;
}

void BitmapText::updateWordColoring()
{
	colorIndices.resize(lines.size());
	for (int i = 0; i < colorIndices.size(); i++)
	{
		colorIndices[i].resize(lines[i].size());
		for (int j = 0; j < colorIndices[i].size(); j++)
		{
			colorIndices[i][j] = Vector(1,1,1);
		}
	}

	/*
	for (int i = 0; i < lines.size(); i++)
	{
		int c = 0;
		for (int t = 0; t < dsq->continuity.wordColoring.size(); t++)
		{
			WordColoring *w = &dsq->continuity.wordColoring[t];
			if ((c = lines[i].find(w->word)) != std::string::npos)
			{
				for (int j = c; j < c + w->word.size(); j++)
				{
					colorIndices[i][j] = w->color;
				}
			}
		}
	}
	*/
	//lines.push_back(text);

}

bool BitmapText::isEmpty()
{
	return lines.empty();
}

void BitmapText::scrollText(const std::string &text, float scrollSpeed)
{
	if (text.empty()) return;
	this->scrollSpeed = scrollSpeed;
	scrollDelay = scrollSpeed;
	this->text = text;
	scrolling = true;
	formatText();
	currentScrollLine = 0;
	currentScrollChar = 0;
}

void BitmapText::setFontSize(int sz)
{
	this->fontDrawSize = sz;
}

void BitmapText::onUpdate(float dt)
{
	bfePass = 0;
	RenderObject::onUpdate(dt);
	if (scrollDelay > 0 && scrolling)
	{
		if (lines.empty())
		{
			currentScrollLine = 0;
			scrolling = false;
			scrollDelay = 0;
		}
		else
		{
			scrollDelay -= dt;
			while (scrollDelay <= 0)
			{
				float diff = scrollDelay;
				scrollDelay = scrollSpeed;
				scrollDelay += diff;
				currentScrollChar ++;
				if (currentScrollChar >= lines[currentScrollLine].size())
				{
					currentScrollLine++;
					currentScrollChar = 0;
					if (currentScrollLine >= lines.size())
					{
						currentScrollLine = 0;
						scrolling = false;
					}
				}
			}
		}
	}
}

Vector BitmapText::getColorIndex(int i, int j)
{
	Vector c(1,1,1);
	if (!(i < 0 || j < 0))
	{
		if ( i < colorIndices.size() && j < colorIndices[i].size())
		{
			c = colorIndices[i][j];
		}
	}
	return c;
}

void BitmapText::onRender()
{
	if (!bmpFont) return;
	float top_color[3] = {bmpFont->fontTopColor.x*color.x, bmpFont->fontTopColor.y*color.y, bmpFont->fontTopColor.z*color.z};
	float bottom_color[3] = {bmpFont->fontBtmColor.x*color.x, bmpFont->fontBtmColor.y*color.y, bmpFont->fontBtmColor.z*color.z};

#ifdef BBGE_BUILD_OPENGL
	glEnable(GL_TEXTURE_2D);
	/*
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	*/
	glDisable(GL_CULL_FACE);

	//glScalef(1, -1, 0);

	bmpFont->font.Begin();

	if (fontTextureTest) fontTextureTest->apply();

	if (bmpFont->overrideTexture) bmpFont->overrideTexture->apply();

	float y=0;
	float x=0;

	float adj = bmpFont->font.GetCharHeight('A') * bmpFont->scale;

	if (scrolling)
	{
		for (int i = 0; i <= currentScrollLine; i++)
		{
			std::string theLine = lines[i];
			if (i == currentScrollLine)
				theLine = theLine.substr(0, currentScrollChar);

			x=0;
			if (align == ALIGN_CENTER)
			{
				std::pair<int, int> sz;
				bmpFont->font.GetStringSize(lines[i], &sz);
				x = -sz.first*0.5f*bmpFont->scale;
			}
			float la = 1.0f-(scrollDelay/scrollSpeed);
			/*
			std::ostringstream os;
			os << "la: " << la;
			debugLog(os.str());
			*/

			bmpFont->font.DrawString(theLine, bmpFont->scale, x, y, top_color, bottom_color, alpha.x, la);
			y += adj;
		}
	}
	else
	{
		for (int i = 0; i < lines.size(); i++)
		{
			x=0;
			if (align == ALIGN_CENTER)
			{
				std::pair<int, int> sz;
				bmpFont->font.GetStringSize(lines[i], &sz);
				x = -sz.first*0.5f*bmpFont->scale;
			}
			bmpFont->font.DrawString(lines[i], bmpFont->scale, x, y, top_color, bottom_color, alpha.x, 1);
			y += adj;
		}
	}
	
	glEnable(GL_CULL_FACE);
	glBindTexture(GL_TEXTURE_2D, 0);

#endif
}

void BitmapText::unloadDevice()
{
	RenderObject::unloadDevice();
}

void BitmapText::reloadDevice()
{
	RenderObject::reloadDevice();
	setText(this->text);
}

void BitmapText::render()
{
	RenderObject::render();
	if (!bfePass)
	{
		if (bfe == BFE_SHADOWBLUR)
		{
			InterpolatedVector oldAlpha = alpha, oldPos = position;
			Vector adjust(rand()%5-2, rand()%5-2+2);
			position += adjust;
			alpha *= 0.4f;
			bfePass = 1;
			RenderObject::render();
			alpha = oldAlpha;
			position = oldPos;
		}
	}
}

void BitmapText::stopScrollingText()
{
	scrolling = false;
}

bool BitmapText::isScrollingText()
{
	return scrolling;
}

int BitmapText::getNumLines()
{
	return lines.size();
}

/*
BitmapText::BitmapText() : RenderObject()
{
	cull = false;
	followCamera = 1;
	scrollSpeed = 0.1f;
}

void BitmapText::scrollText(const std::string &text, float scrollSpeed)
{
	setText(text);
	this->scrollSpeed = scrollSpeed;
}

void BitmapText::setText(const std::string &text)
{
	this->text = text;
}

std::string BitmapText::getText()
{
	return text;
}

void BitmapText::onRender()
{
	CTextDrawer::GetSingleton().SetColor(color.x, color.y, color.z, alpha.getValue());
	dsq->print(position.x, 600 - (position.y + 16*2), text);
}
*/