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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 "client/chat.h"
#include "client/client.h"
#include "core/core.h"
#include "core/gameinterface.h"
#include "sys/sys.h"
#include "ui/ui.h"

namespace client
{

const size_t DEFAULT_CHAT_LOG_SIZE = 2048;
const size_t DEFAULT_CHAT_HISTO_SIZE = 512;

Chat::Chat(ui::Widget *parent) : ui::Window(parent)
{
	set_label("chat");
	history.clear();
	history.push_back("");
	history_pos = history.rbegin();
	
		// window title
	chat_titlelabel = new ui::Label(this);
	chat_titlelabel->set_label("title");
	chat_titlelabel->set_background(false);
	chat_titlelabel->set_border(false);
	chat_titlelabel->set_font(ui::root()->font_large());
	chat_titlelabel->set_alignment(ui::AlignCenter);
	chat_titlelabel->set_text("CHAT");
	
	// close button
	chat_closebutton = new ui::IconButton(chat_titlelabel, "bitmaps/icons/window_close");
	
	chat_scrollpane = new ui::ScrollPane(this, chat_log);
	chat_scrollpane->set_border(false);
	chat_scrollpane->set_label("text");
	
	chat_playerlist = new ui::ListView(this);
	chat_playerlist->set_label("playerlist");

	chat_input = new ui::InputBox(this);
	chat_input->set_border(false);
	set_prompt();
	chat_input->set_focus();

	set_background(true);
	set_visible(false);

	chat_small = false;
	chat_playerlist_timestamp = 0;
}

Chat::~Chat()
{
	history.clear();
}

void Chat::clear()
{
	chat_log.clear();
	chat_input->clear();
	chat_playerlist->clear();
	chat_playerlist_timestamp = 0;
}


void Chat::set_small_view(bool small_chat_view)
{
	chat_small = small_chat_view;
	resize();
}

void Chat::event_text(const std::string & text)
{
	while (chat_log.size() >= DEFAULT_CHAT_LOG_SIZE) {
		chat_log.pop_front();
	}
	chat_log.push_back(text);
}

void Chat::show()
{
	Window::show();

	history_pos = history.rbegin();
	(*history_pos).clear();
	chat_input->set_text((*history_pos));

	chat_scrollpane->set_scroll(0);
}

void Chat::toggle()
{
	if (visible())
		hide();
	else
		show();
}

bool Chat::on_emit(ui::Widget *sender, const ui::Widget::Event event, void *data)
{
	if (sender == chat_closebutton) {
		if (event == ui::Widget::EventButtonClicked) {
			hide();
			return true;
		}
	}
	
	return Window::on_emit(sender, event, data);
}

bool Chat::on_keypress(const int key, const unsigned int modifier)
{
	// number of lines to scroll
	const size_t scroll_offset = 3;

	History::reverse_iterator upit;

	switch (key) {
		case SDLK_ESCAPE:
			if (visible()) {
				hide();
				return true;
			} else {
				return false;
			}
			
		case SDLK_RETURN:
			if (chat_input->text().size()) {
				// store input into history
				while (history.size() >= DEFAULT_CHAT_HISTO_SIZE) {
					history.pop_front();
				}

				if (chat_input->text().c_str()[0] == '/' || chat_input->text().c_str()[0] == '\\') {
					core::cmd() <<  &chat_input->text().c_str()[1] << std::endl;
				} else {
					// FIXME semi-column ; truncates the command
					//core::cmd() << "say " << chat_input->text() << std::endl;
					client()->say(chat_input->text());
				}
				(*history.rbegin()) = chat_input->text();

				history.push_back("");
				history_pos = history.rbegin();
				chat_input->set_text((*history_pos));

				if (chat_small)
					hide();
			} else {
				hide();
			}
			return true;
			break;

		case SDLK_TAB:
			if (chat_input->text().size() && chat_input->text()[0] == '/') {
				// command mode
				chat_input->complete();
			} else {
				// TODO chat mode, switch channel
			}
			return true;
			break;

		case SDLK_UP:
			upit = history_pos;
			++upit;
			if (upit != history.rend()) {
				history_pos = upit;
				chat_input->set_text((*history_pos));
			}
			return true;
			break;

		case SDLK_DOWN:
			if (history_pos != history.rbegin()) {
				--history_pos;
				chat_input->set_text((*history_pos));
			}
			return true;
			break;

		case SDLK_PAGEUP:
			chat_scrollpane->inc_scroll(scroll_offset);
			return true;
			break;

		case SDLK_PAGEDOWN:
			chat_scrollpane->dec_scroll(scroll_offset);
			return true;
			break;
	}

	return false;
}

void Chat::set_prompt()
{
	if (chat_input->text().size() && chat_input->text()[0] == '/') {
		chat_input->set_prompt("^BCommand^F:^B ");
	} else {
		chat_input->set_prompt("^BSay^F:^B ");
	}
}

void Chat::draw()
{
	if (!chat_small && (chat_playerlist_timestamp != core::game()->playerlist_timestamp())) {
		update_player_list();
	}
	
	set_prompt();
	ui::Window::draw();
}

void Chat::update_player_list()
{
	chat_playerlist->clear();
	
	for (core::GameInterface::Players::const_iterator it = core::game()->players().begin(); it != core::game()->players().end(); it++) {
		ui::ListItem *listitem = new ui::ListItem(chat_playerlist, (*it)->name().c_str());
		listitem->set_height(listitem->font()->height() * 1.5f);
		listitem->set_sortkey(aux::text_strip_lowercase((*it)->name()));
	}
	
	chat_playerlist->sort();
	
	chat_playerlist_timestamp = core::game()->playerlist_timestamp();
}

void Chat::resize()
{
	const float padding =  ui::root()->font_large()->height();
	
	if (chat_small) {
		chat_playerlist->hide();
		chat_scrollpane->hide();
		chat_titlelabel->hide();
		
	} else {
		chat_playerlist->show();
		chat_scrollpane->show();
		chat_titlelabel->show();
		
		// resize title label
		chat_titlelabel->set_size(width() - padding * 2.0f, chat_titlelabel->font()->height());	
		chat_titlelabel->set_location(padding, padding);

		// resize close button
		chat_closebutton->set_size(chat_titlelabel->font()->height(), chat_titlelabel->font()->height());
		chat_closebutton->set_location(chat_titlelabel->width() - chat_closebutton->width(), 0);

		// resize player names listview
		chat_playerlist->set_location(padding, chat_titlelabel->bottom() + padding);
		chat_playerlist->set_size(ui::UI::elementsize.width() * 1.5f, height() - chat_playerlist->top() - padding * 2.0f);
		
		// resize chat text pane
		chat_scrollpane->set_location(chat_playerlist->right() + padding, chat_titlelabel->bottom() + padding);
		chat_scrollpane->set_size(width() - chat_scrollpane->left() - padding, chat_playerlist->height());
	}

	// input bar
	chat_input->set_location(padding, height() - padding);
	chat_input->set_size(width() - 2.0f * padding , padding);
}


} // namespace client