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

#include <iomanip>

#include "core/application.h"
#include "core/info.h"
#include "core/inventory.h"
#include "ui/button.h"
#include "ui/paint.h"
#include "ui/ui.h"
#include "ui/listitem.h"
#include "client/trademenu.h"

namespace client {

TradeMenu::TradeMenu(ui::Widget *parent, const char * label) : ui::Widget(parent)
{
	set_border(false);
	set_background(false);	
	if (label)
		set_label(label);
	else
		set_label("trademenu");

	menu_tradewindow = new ui::Window(this);
	menu_tradewindow->set_label("tradewindow");
	menu_tradewindow->set_border(true);

	menu_modelview = new ui::ModelView(menu_tradewindow);
	menu_modelview->set_label("modelview");
	menu_modelview->set_background(false);
	menu_modelview->set_border(false);
	
	menu_slider = new ui::Slider(menu_tradewindow);
	menu_slider->set_background(false);
	menu_slider->set_border(true);
	
	menu_msgtext = new ui::Label(menu_tradewindow);
	menu_msgtext->set_label("label");
	menu_msgtext->set_background(false);
	menu_msgtext->set_border(false);
	menu_msgtext->set_alignment(ui::AlignCenter);

	menu_namelabel = new ui::Label(menu_tradewindow);
	menu_namelabel->set_label("label");
	menu_namelabel->set_background(false);
	menu_namelabel->set_border(false);
	menu_namelabel->set_font(ui::root()->font_large());
	menu_namelabel->set_alignment(ui::AlignCenter);
	menu_namelabel->show();
	
	menu_inventorylistview = new InventoryListView(menu_tradewindow);
	menu_inventorylistview->set_label("inventorylistview");
	menu_inventorylistview->set_background(false);
	menu_inventorylistview->set_border(true);
	
	menu_inventorytext = new ui::PlainText(menu_tradewindow);
	menu_inventorytext->set_label("inventorytext");
	menu_inventorytext->set_background(false);
	menu_inventorytext->set_border(false);
	menu_inventorytext->set_font(ui::root()->font_small());
	
	menu_scrollpane = new ui::ScrollPane(menu_tradewindow, menu_infotext);
	menu_scrollpane->set_background(false);
	menu_scrollpane->set_border(false);
	menu_scrollpane->set_alignment(ui::AlignTop);
	
	menu_traderlistview = new InventoryListView(menu_tradewindow);
	menu_traderlistview->set_label("traderlistview");
	menu_traderlistview->set_background(false);
	menu_traderlistview->set_border(true);
	
	menu_tradertext = new ui::PlainText(menu_tradewindow);
	menu_tradertext->set_label("tradertext");
	menu_tradertext->set_background(false);
	menu_tradertext->set_border(false);
	menu_tradertext->set_font(ui::root()->font_small());
		
	menu_closebutton = new ui::Button(menu_tradewindow, "Return", "view hide");
	menu_buybutton = new ui::Button(menu_tradewindow, "Buy");

	menu_listitem = 0;
	
	set_itemtype(0);
	set_item(0);
	
	hide();
}

TradeMenu::~TradeMenu()
{

}

void TradeMenu::set_itemtype(core::InfoType *item_type)
{
	// reset
	menu_namelabel->set_text(0);
	menu_itemtype = item_type;
	
	core::Inventory *inventory_player = 0;
	core::Inventory *inventory_view = 0;
	if (core::localcontrol())
		inventory_player = core::game()->request_inventory(core::localcontrol());
	
	if(core::localplayer()->view())
		inventory_view =  core::game()->request_inventory(core::localplayer()->view());
	
	menu_inventorylistview->set_inventory(inventory_player, item_type);
	menu_traderlistview->set_inventory(inventory_view, item_type);
	
	//set_item(0);
}

void TradeMenu::set_item(ui::ListItem *item)
{
	menu_infotext.clear();
	
	menu_namelabel->set_text("Trade");
	
	menu_tradertext->clear();
	menu_msgtext->clear();
	menu_msgtext->hide();
	menu_slider->hide();
	
	menu_buybutton->set_command("");
	menu_buybutton->hide(); // FIXME enable/disable button
	
	if (item != menu_listitem) {
		menu_slider->set_range(0, 2);
		menu_slider->set_value(1);
		menu_listitem = item;
	}
		
	if (!item || !item->info()) {
		menu_traderlistview->deselect();
		menu_inventorylistview->deselect();
					
		menu_scrollpane->hide();
		menu_modelview->hide();
		menu_slider->set_range(0, 2);
		menu_slider->set_value(1);
		return;
	}

	long amount = 0; // reserved
	
	for (core::Info::Text::const_iterator it = item->info()->text().begin(); it != item->info()->text().end(); it++) {
		menu_infotext.push_back((*it));
	}

	menu_scrollpane->show();
	menu_modelview->set_modelname(item->info()->modelname());	
	menu_modelview->show();
	
	if (item->parent() == menu_inventorylistview) {
		
		// item in ship inventory selected (SELL)
		menu_buybutton->set_text("Sell");
		menu_traderlistview->deselect();
				
		const core::Item *trader_item = (menu_traderlistview->inventory() ? menu_traderlistview->inventory()->find(item->info()) : 0);
		if (trader_item) {
			
			const long max_amount = item->item()->amount();
			if (max_amount > 0) {
				menu_slider->set_range(1, max_amount);
				menu_slider->show();
				
				amount = menu_slider->value();
				
				std::ostringstream commandstr;
				commandstr << "remote sell " << item->info()->type()->label() << " " << item->info()->label() << " " <<  amount;
				menu_buybutton->set_command(commandstr.str());
				
				menu_buybutton->enable();
				menu_buybutton->show();
			}
			
			if (amount < 1) {				
				menu_msgtext->set_text("^1Can not sell");
				menu_msgtext->show();
			}
			
			std::ostringstream str;
			str << "Price:   " << std::setw(12) << (amount > 0 ? amount : 1) * trader_item->price() << '\n' 
			    << "Volume:  " << std::setw(12) << (float)(amount > 0 ? amount : 1) * trader_item->info()->volume();
			menu_tradertext->set_text(str.str());
		} else {
			menu_msgtext->set_text("^1Can not sell here");
			menu_msgtext->show();
		}
		
		std::ostringstream labelstr;
		labelstr << "Sell " << item->info()->name();
		if (amount)
			labelstr << " (" << amount << ")";
		menu_namelabel->set_text(labelstr.str());


	} else if (item->parent() == menu_traderlistview) {
		
		// item in trader inventory selected (BUY)
		menu_buybutton->set_text("Buy");
		menu_inventorylistview->deselect();
				
		if (menu_inventorylistview->inventory()) {
			
			const long item_unit_price = item->item()->price();
			const float item_unit_volume = item->info()->volume();
			long max_amount = core::localcontrol()->inventory()->max_amount(core::localplayer()->credits(),  item_unit_price, item_unit_volume);
			
			if (item->item()->amount() >= 0) {
				max_amount = math::min(max_amount, item->item()->amount());
			}
			
			if (max_amount > 0) {
				menu_slider->set_range(1, max_amount);
				menu_slider->show();
				amount = menu_slider->value();
				
				std::ostringstream commandstr;
				commandstr << "remote buy " << item->info()->type()->label() << " " << item->info()->label() << " " << amount;
				menu_buybutton->set_command(commandstr.str());
				
				menu_buybutton->enable();
				menu_buybutton->show();
			}

			if (amount < 1) {
				if (item_unit_price > core::localplayer()->credits()) {
					menu_msgtext->set_text("^1Not enough credits");
				} else if (item_unit_volume > menu_inventorylistview->inventory()->capacity_available()) {
					menu_msgtext->set_text("^1Not enough cargo space");
				} else {
					menu_msgtext->set_text("^1Can not buy");
				}
				menu_msgtext->show();
			}
			
			std::ostringstream str;
			str << "Price:   " << std::setw(12) << (amount > 0 ? amount : 1) * item->item()->price() << '\n' 
			<< "Volume:  " << std::setw(12) << (float) (amount > 0 ? amount : 1) * item->info()->volume();
			
			menu_tradertext->set_text(str.str());
		}
		
		std::ostringstream labelstr;
		labelstr << "Buy " << item->info()->name();
		if (amount > 0)
			labelstr << " (" << amount << ")";
		menu_namelabel->set_text(labelstr.str());

	} else {
		menu_traderlistview->deselect();
		menu_inventorylistview->deselect();
	}
}

void TradeMenu::resize()
{
	const float smallmargin = ui::UI::elementsize.height();
	const float fontmargin =  ui::root()->font_large()->height();

	// this menu takes the entire screen
	set_size(parent()->size());
	
	// resize the subwindow
	menu_tradewindow->set_size(width() - smallmargin * 2.0f, height()- smallmargin * 4.0f);
	menu_tradewindow->set_location(smallmargin, smallmargin * 2.0f);

	// resize label
	menu_namelabel->set_size(menu_tradewindow->width() - fontmargin * 2.0f, menu_namelabel->font()->height());	
	menu_namelabel->set_location(fontmargin, fontmargin);
	
	// resize inventory listview
	menu_inventorylistview->set_size(ui::UI::elementsize.width(), menu_tradewindow->height() - smallmargin * 2.0f - fontmargin * 6.0f);
	menu_inventorylistview->set_location(fontmargin, fontmargin * 3.0f);
	
	menu_inventorytext->set_size(menu_inventorylistview->width(), fontmargin * 2.0f);
	menu_inventorytext->set_location(menu_inventorylistview->left(),  menu_inventorylistview->bottom() + fontmargin);
	
	// resize modelview
	menu_modelview->set_size(menu_tradewindow->width() - 2.0f * ui::UI::elementsize.width() - fontmargin * 4.0f, ui::UI::elementsize.width());
	menu_modelview->set_location(fontmargin * 2.0f + ui::UI::elementsize.width(), fontmargin * 3.0f);
	
	// resize slider
	menu_slider->set_size(menu_modelview->width(), fontmargin);
	menu_slider->set_location(menu_modelview->left(), menu_modelview->bottom() - menu_slider->height());
	
	// warning text
	menu_msgtext->set_size(menu_slider->size());
	menu_msgtext->set_location(menu_slider->location());
		
	// resize scrollpane
	menu_scrollpane->set_size(menu_tradewindow->width() - 2.0f * ui::UI::elementsize.width() - fontmargin * 4.0f, menu_inventorylistview->height() + 2.0f * fontmargin - ui::UI::elementsize.width());
	menu_scrollpane->set_location(fontmargin * 2.0f + ui::UI::elementsize.width(), fontmargin * 4.0f + ui::UI::elementsize.width());
		
	// resize trader listview
	menu_traderlistview->set_size(ui::UI::elementsize.width(), menu_tradewindow->height() - smallmargin * 2.0f - fontmargin * 6.0f);
	menu_traderlistview->set_location(menu_tradewindow->width() - menu_traderlistview->width() - fontmargin, fontmargin * 3.0f);
	
	menu_tradertext->set_size(menu_traderlistview->width(), fontmargin * 2.0f);
	menu_tradertext->set_location(menu_traderlistview->left(),  menu_traderlistview->bottom() + fontmargin);
		
	// resize buttons
	menu_buybutton->set_size(ui::UI::elementsize);	
	menu_buybutton->set_location(menu_tradewindow->width() * 0.5f - ui::UI::elementsize.width() - smallmargin * 2.0f, menu_tradewindow->height() - smallmargin * 1.5f);
	
	menu_closebutton->set_size(ui::UI::elementsize);
	menu_closebutton->set_location(menu_tradewindow->width() * 0.5f + smallmargin * 2.0f, menu_tradewindow->height() - smallmargin * 1.5f);
}

bool TradeMenu::on_emit(Widget *sender, const Event event, void *data)
{
	if (event == ui::Widget::EventSliderChanged) {
		// slider value changed
		if (menu_traderlistview->selected()) {
			set_item(menu_traderlistview->selected());
		} else {
			set_item(menu_inventorylistview->selected());
		}
		return true;
		
	} else if (event == ui::Widget::EventListViewChanged) {
		// listview changed
		if (sender == menu_traderlistview) {
			set_item(menu_traderlistview->selected());
			
		} else if (sender == menu_inventorylistview) {
			set_item(menu_inventorylistview->selected());
		}
		return true;
	}
	
	return ui::Widget::on_emit(sender, event, data);
}

void TradeMenu::draw()
{
	// sanity check
	if ((menu_inventorylistview->inventory() != (core::localcontrol() ? core::localcontrol()->inventory() : 0 )) ||
	    (menu_traderlistview->inventory() != (core::localplayer()->view() ? core::localplayer()->view()->inventory() : 0 ))) {
		set_itemtype(menu_itemtype);
	}
	
	std::stringstream str;
	str << "Credits: " << std::setw(12) << core::localplayer()->credits();

	if (core::localcontrol() && core::localcontrol()->inventory()) {
		core::Inventory *inventory = core::localcontrol()->inventory();
		
		std::stringstream cargostr;
		cargostr << inventory->capacity_used() << " of " << inventory->capacity();
		
		str << '\n' << "Cargo:   " << aux::pad_left(cargostr.str(),12);
	}
	menu_inventorytext->set_text(str.str());
	
	Widget::draw();
}

bool TradeMenu::on_keypress(const int key, const unsigned int modifier)
{
	switch (key) {

		case SDLK_ESCAPE:
			this->hide();
			return true;
			break;
		default:
			break;
	}

	return Widget::on_keypress(key, modifier);
}

} // namespace client