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/*
   client/chat.cc
   This file is part of the Osirion project and is distributed under 
   the terms and conditions of the GNU General Public License version 2 
*/

#include "auxiliary/functions.h"
#include "core/core.h"
#include "client/chat.h"
#include "client/console.h"
#include "client/keyboard.h"
#include "client/video.h"
#include "render/render.h"

namespace client {

namespace chat {

// input history
std::deque<std::string> history;
std::deque<std::string>::reverse_iterator history_pos;
size_t input_pos = 0;

// chatbox visibility
bool chat_visible = false;

//--- engine functions --------------------------------------------

void func_con_chat(std::string const &args)
{
	std::istringstream argstream(args);
	int i;

	if (argstream >> i) {
		if (i) chat_visible = true; else chat_visible = false;
	} else
		chat_visible = !chat_visible;

	
}

//--- public ------------------------------------------------------

void init()
{
	// add engine functions
	core::Func *func = core::Func::add("ui_chat", (core::FuncPtr) func_con_chat);
	func->set_info("toggle chatbox");
	
	history.clear();
	history.push_back("");
	history_pos = history.rbegin();
	input_pos = 0;

}

void shutdown()
{
	// remove engine functions
	core::Func::remove("ui_chat");
	
	history.clear();
	input_pos = 0;
}


bool visible()
{
	return chat_visible;
}

void draw()
{
	using namespace render;

	if (console()->visible() || !visible())
		return;

	size_t width = (size_t) (video::width / Text::fontwidth()) - 8;
	float y = video::height*8/10;
	Text::draw(4, y, "^BSay^F:^B ");

	std::string firstpart((*history_pos).substr(0, input_pos));
	size_t draw_width = 0;
	const char *c = firstpart.c_str();

	while (*c) {
		if (aux::is_color_code(c)) {
			c++;
		} else {
			draw_width++;
		}
		c++;
	}

	c = firstpart.c_str();
	while (*c && draw_width > width - 2) {
		if (aux::is_color_code(c)) {
			c++;
			Text::setcolor(*c);
		} else {
			draw_width--;
		}
		c++;
	}

	if (*c) {
		Text::draw(4+5*Text::fontwidth(), y, c);
	}

	if (input_pos < (*history_pos).size()) {
		// FIXME limit to width
		if (input_pos > 1 && aux::is_color_code((*history_pos).c_str() + input_pos -1)) {
			Text::setcolor((*history_pos)[input_pos]);
		}
		c = (*history_pos).c_str() + input_pos;
		Text::draw(4+Text::fontwidth()*(draw_width+5), y, c);
	}

	// draw cursor
	if ((core::application()->time() - ::floorf(core::application()->time())) < 0.5f) {
		std::string cursor("^B_");
		Text::draw(4+Text::fontwidth()*(draw_width+5), y , cursor);
	}
}

void toggle()
{
	chat_visible = !chat_visible;
	if (chat_visible) {
		input_pos = 0;
		history_pos = history.rbegin();
		(*history_pos).clear();	
	}

	setkeyboardmode(chat_visible);
}

void keypressed(int key)
{
	std::deque<std::string>::reverse_iterator upit;

	switch( key ) {
	case SDLK_TAB:
		core::CommandBuffer::complete( (*history_pos), input_pos);
		break;
	case SDLK_RETURN:
		if ((*history_pos).size()) {
			// store input into history
			while (history.size() >= MAXHISTOLINES) {
				history.pop_front();
			}

			if ((*history_pos).c_str()[0] == '/' || (*history_pos).c_str()[0] == '\\') {
				core::cmd() <<  &(*history_pos).c_str()[1] << std::endl;
			} else {
				core::cmd() << "say " << (*history_pos) << std::endl;
			}
			(*history.rbegin()) = (*history_pos);

			history.push_back("");
			history_pos = history.rbegin();
			input_pos = 0;
		}
		toggle();
		break;
	case SDLK_UP:
		upit = history_pos;
		++upit;
		if (upit != history.rend()) {
			history_pos = upit;
			input_pos = (*history_pos).size();
		}
		break;
	case SDLK_DOWN:
		if (history_pos != history.rbegin()) {
			--history_pos;
			input_pos = (*history_pos).size();
		}
		break;
	case SDLK_HOME:
		input_pos = 0;
		break;
	case SDLK_END:		
		input_pos = (*history_pos).size();
		break;
	case SDLK_LEFT:
		if (input_pos > 0)
			input_pos--;
		break;
	case SDLK_RIGHT:
		if (input_pos < (*history_pos).size())
			input_pos++;
		break;
	case SDLK_BACKSPACE:
		if ((*history_pos).size() && input_pos) {
			(*history_pos).erase(input_pos-1, 1);
			input_pos--;
		}
		break;
	default:
		if ((key >= 32 ) && (key <175)) {
			if (input_pos == (*history_pos).size())
				(*history_pos) += (char)key;
			else
				(*history_pos).insert(input_pos, 1, (char)key);
			input_pos++;
		}
		break;
	}
}

}

}