////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2011, 2025
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
////////////////////////////////////////////////////////////////////////////////

#include <console/ConsoleLines.hpp>
#include <common/DefinesString.hpp>
#include <string>

unsigned ConsoleLine::nextLineNumber_ = 0;

ConsoleLine::ConsoleLine() :
	lineNumber_(0),
	lineType_(eNone)
{}

ConsoleLine::~ConsoleLine()
{}

void ConsoleLine::set(const LangString &line, LineType type)
{
	line_ = line;
	lineType_ = type;
	if (lineType_ == eCommand)
	{
		lineNumber_ = ++nextLineNumber_;
	}
	if (lineType_ == eCommandCont)
	{
		lineNumber_ = nextLineNumber_;
	}
	lineNumberStr_= LANG_STRING(S3D::formatStringBuffer("%4i", lineNumber_));
}

void ConsoleLine::drawLine(float x, float y, GLFont2d *font)
{
	static Vector color(0.9f, 0.9f, 0.9f);
	if (lineType_ != eNone)
	{
		if (lineType_ == eCommand)
		{
			// We show a line number of those lines with commands
			// on them
			font->draw(color, 12, x, y, 0.0f, lineNumberStr_);
			font->draw(color, 12, x + 50.0f, y, 0.0f, line_);
		}
		else
		{
			font->draw(color, 12, x + 50.0f, y, 0.0f, "...");
			font->draw(color, 12, x + 90.0f, y, 0.0f, line_);
		}
	}
	else
	{
		font->draw(color, 12, x + 50.0f, y, 0.0f, line_);
	}
}

ConsoleLines::ConsoleLines(unsigned int maxLines) :
	maxLines_(maxLines),
	currentLine_(0)
{}

ConsoleLines::~ConsoleLines()
{}

void ConsoleLines::clear()
{
	currentLine_ = 0;
	while (!lines_.empty())
	{
		ConsoleLine *line = lines_.front();
		lines_.pop_front();
		delete line;
	}
}

void ConsoleLines::scroll(int lines)
{
	int scrollLine = (int)currentLine_ - lines;

	if (scrollLine < 0)
		currentLine_ = 0;
	else if ( lines_.size() <= (unsigned int)scrollLine )
		currentLine_ = lines_.size();
	else
		currentLine_ = (unsigned int)scrollLine;
}

void ConsoleLines::addLine(const std::string &originalText, bool showPointer)
{
	LangString langStringText(LANG_STRING(originalText)), buffer;

	int section = 0;
	for (const unsigned int *a=langStringText.c_str();
		*a;
		a++)
	{
		if (*a != '\n') buffer.push_back(*a);
		if (buffer.size() > 80 || (buffer.size() > 65 && *a ==' ') || *a=='\n')
		{
			addSmallLine(section++, buffer, showPointer);
			buffer.clear();
		}
	}
	if (!buffer.empty())
	{
		addSmallLine(section++, buffer, showPointer);
	}
}

void ConsoleLines::addSmallLine(int sectionNo, const LangString &text, bool showPointer)
{
	ConsoleLine::LineType type = ConsoleLine::eNone;
	if (showPointer)
	{
		if (sectionNo == 0) type = ConsoleLine::eCommand;
		else type = ConsoleLine::eCommandCont;
	}

	if (lines_.size() == maxLines_)
	{
		// We need to reuse the lines
		// reuse the first line
		ConsoleLine *line = lines_.back();
		lines_.pop_back();
		line->set(text, type);
		lines_.push_front(line);
	}
	else
	{
		// Add a new line
		ConsoleLine *line = new ConsoleLine;
		line->set(text, type);
		lines_.push_front(line);
	}

	// Set the lookat and cursor to point at the new line
	if (currentLine_ != 0)
	{
		currentLine_ ++;
		if (lines_.size() < currentLine_)
			currentLine_ = lines_.size();
	}
}

void ConsoleLines::drawLines(GLFont2d *font, float startHeight, float totalHeight, float totalWidth)
{
	if (currentLine_ != 0)
	{
		// Draw arrows at the bottom of the screen if stuff off bottom
		glColor3f(0.7f, 0.7f, 0.7f);
		glBegin(GL_TRIANGLES);
			for (float a=100.0f; a<totalWidth - 100.0f; a+=totalWidth / 25.0f)
			{
				glVertex2f(a + 20.0f, startHeight - 4.0f);
				glVertex2f(a + 24.0f, startHeight - 8.0f);
				glVertex2f(a + 28.0f, startHeight - 4.0f);
			}
		glEnd();
	}

	bool offTop = false;
	{
		// Draw all of the text
		// Stops each drawLine() from changing state
		GLState currentState(GLState::TEXTURE_ON | GLState::BLEND_ON);

		float position = startHeight + 20.0f;
		for (unsigned int i = currentLine_; i < lines_.size(); i++)
		{
			ConsoleLine *line = lines_[i];
			line->drawLine(20.0f, position, font);

			position += 15.0f;
			if (position > totalHeight - 20.0f)
			{
				offTop = true;
				break;
			}
		}
	}

	if (offTop)
	{
		// Draw arrows at top of screen if stuff off top
		glColor3f(0.7f, 0.7f, 0.7f);
		glBegin(GL_TRIANGLES);
			for (float a=100.0f; a<totalWidth - 100.0f; a+=totalWidth / 25.0f)
			{
				glVertex2f(a + 24.0f, totalHeight - 4.0f);
				glVertex2f(a + 20.0f, totalHeight - 8.0f);
				glVertex2f(a + 28.0f, totalHeight - 8.0f);
			}
		glEnd();
	}
}
