/*
  This file is part of Ingen.
  Copyright 2007-2012 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <cassert>
#include <string>

#include <gtkmm/eventbox.h>

#include "lv2/lv2plug.in/ns/ext/atom/util.h"

#include "ingen/Configuration.hpp"
#include "ingen/Interface.hpp"
#include "ingen/Log.hpp"
#include "ingen/client/BlockModel.hpp"
#include "ingen/client/GraphModel.hpp"
#include "ingen/client/PluginModel.hpp"
#include "ingen/client/PluginUI.hpp"
#include "raul/Atom.hpp"

#include "App.hpp"
#include "GraphCanvas.hpp"
#include "GraphWindow.hpp"
#include "NodeMenu.hpp"
#include "NodeModule.hpp"
#include "Port.hpp"
#include "RenameWindow.hpp"
#include "Style.hpp"
#include "SubgraphModule.hpp"
#include "WidgetFactory.hpp"
#include "WindowFactory.hpp"
#include "ingen_config.h"

using namespace std;

namespace Ingen {

using namespace Client;

namespace GUI {

NodeModule::NodeModule(GraphCanvas&           canvas,
                       SPtr<const BlockModel> block)
	: Ganv::Module(canvas, block->path().symbol(), 0, 0, true)
	, _block(block)
	, _gui_widget(NULL)
	, _gui_window(NULL)
{
	block->signal_new_port().connect(
		sigc::mem_fun(this, &NodeModule::new_port_view));
	block->signal_removed_port().connect(
		sigc::hide_return(sigc::mem_fun(this, &NodeModule::delete_port_view)));
	block->signal_property().connect(
		sigc::mem_fun(this, &NodeModule::property_changed));
	block->signal_moved().connect(
		sigc::mem_fun(this, &NodeModule::rename));

	signal_event().connect(
		sigc::mem_fun(this, &NodeModule::on_event));

	signal_moved().connect(
		sigc::mem_fun(this, &NodeModule::store_location));

	signal_selected().connect(
		sigc::mem_fun(this, &NodeModule::on_selected));

	const PluginModel* plugin = dynamic_cast<const PluginModel*>(block->plugin());
	if (plugin) {
		plugin->signal_changed().connect(
			sigc::mem_fun(this, &NodeModule::plugin_changed));
	}
}

NodeModule::~NodeModule()
{
	delete _gui_widget;
	delete _gui_window;
}

bool
NodeModule::show_menu(GdkEventButton* ev)
{
	WidgetFactory::get_widget_derived("object_menu", _menu);
	_menu->init(app(), _block);
	_menu->signal_embed_gui.connect(
		sigc::mem_fun(this, &NodeModule::on_embed_gui_toggled));
	_menu->signal_popup_gui.connect(
		sigc::hide_return(sigc::mem_fun(this, &NodeModule::popup_gui)));
	_menu->popup(ev->button, ev->time);
	return true;
}

NodeModule*
NodeModule::create(GraphCanvas&           canvas,
                   SPtr<const BlockModel> block,
                   bool                   human)
{
	SPtr<const GraphModel> graph = dynamic_ptr_cast<const GraphModel>(block);

	NodeModule* ret = (graph)
		? new SubgraphModule(canvas, graph)
		: new NodeModule(canvas, block);

	for (const auto& p : block->properties())
		ret->property_changed(p.first, p.second);

	for (const auto& p : block->ports())
		ret->new_port_view(p);

	ret->set_stacked(block->polyphonic());

	if (human)
		ret->show_human_names(human); // FIXME: double port iteration

	return ret;
}

App&
NodeModule::app() const
{
	return ((GraphCanvas*)canvas())->app();
}

void
NodeModule::show_human_names(bool b)
{
	const URIs& uris = app().uris();

	if (b) {
		set_label(block()->label().c_str());
	} else {
		set_label(block()->symbol().c_str());
	}

	for (iterator i = begin(); i != end(); ++i) {
		Ingen::GUI::Port* const port = dynamic_cast<Ingen::GUI::Port*>(*i);
		Glib::ustring label(port->model()->symbol().c_str());
		if (b) {
			const Raul::Atom& name_property = port->model()->get_property(uris.lv2_name);
			if (name_property.type() == uris.forge.String) {
				label = name_property.get_string();
			} else {
				Glib::ustring hn = block()->plugin_model()->port_human_name(
						port->model()->index());
				if (!hn.empty())
					label = hn;
			}
		}
		(*i)->set_label(label.c_str());
	}
}

void
NodeModule::value_changed(uint32_t index, const Raul::Atom& value)
{
	if (!_plugin_ui)
		return;

	_plugin_ui->port_event(index, value.size(), value.type(), value.get_body());
}

void
NodeModule::port_activity(uint32_t index, const Raul::Atom& value)
{
	if (!_plugin_ui)
		return;

	const URIs& uris = app().uris();

	// FIXME: Well, this sucks...
	LV2_Atom* atom = (LV2_Atom*)malloc(sizeof(LV2_Atom) + value.size());
	atom->type = value.type();
	atom->size = value.type();
	memcpy(LV2_ATOM_BODY(atom), value.get_body(), value.size());
	_plugin_ui->port_event(
		index, lv2_atom_total_size(atom), uris.atom_eventTransfer, atom);
	free(atom);
}

void
NodeModule::plugin_changed()
{
	for (iterator p = begin(); p !=end(); ++p)
		dynamic_cast<Ingen::GUI::Port*>(*p)->update_metadata();
}

void
NodeModule::on_embed_gui_toggled(bool embed)
{
	embed_gui(embed);
	app().interface()->set_property(_block->uri(),
	                                app().uris().ingen_uiEmbedded,
	                                app().forge().make(embed));
}

void
NodeModule::embed_gui(bool embed)
{
	if (embed) {
		if (_gui_window) {
			app().log().warn("LV2 GUI already popped up, cannot embed\n");
			return;
		}

		if (!_plugin_ui) {
			const PluginModel* const pm = dynamic_cast<const PluginModel*>(_block->plugin());
			_plugin_ui = pm->ui(app().world(), _block);
		}

		if (_plugin_ui) {
			GtkWidget* c_widget = (GtkWidget*)_plugin_ui->get_widget();
			_gui_widget = Glib::wrap(c_widget);

			Gtk::Container* container = new Gtk::EventBox();
			container->set_name("ingen_embedded_node_gui_container");
			container->set_border_width(2.0);
			container->add(*_gui_widget);
			Ganv::Module::embed(container);
		} else {
			app().log().error("Failed to create LV2 UI\n");
		}

		if (_gui_widget) {
			_gui_widget->show_all();
			set_control_values();
		}

	} else { // un-embed
		Ganv::Module::embed(NULL);
		_plugin_ui.reset();
	}
}

void
NodeModule::rename()
{
	if (app().world()->conf().option("port-labels").get_bool() &&
	    !app().world()->conf().option("human-names").get_bool()) {
		set_label(_block->path().symbol());
	}
}

void
NodeModule::new_port_view(SPtr<const PortModel> port)
{
	Port::create(app(), *this, port,
	             app().world()->conf().option("human-names").get_bool());

	port->signal_value_changed().connect(
		sigc::bind<0>(sigc::mem_fun(this, &NodeModule::value_changed),
		              port->index()));

	port->signal_activity().connect(
		sigc::bind<0>(sigc::mem_fun(this, &NodeModule::port_activity),
		              port->index()));
}

Port*
NodeModule::port(SPtr<const PortModel> model)
{
	for (iterator p = begin(); p != end(); ++p) {
		Port* const port = dynamic_cast<Port*>(*p);
		if (port->model() == model)
			return port;
	}
	return NULL;
}

void
NodeModule::delete_port_view(SPtr<const PortModel> model)
{
	Port* p = port(model);
	if (p) {
		delete p;
	} else {
		app().log().warn(Raul::fmt("Failed to find port %1% on module %2%\n")
		                 % model->path() % _block->path());
	}
}

bool
NodeModule::popup_gui()
{
	if (_block->plugin() && _block->plugin()->type() == PluginModel::LV2) {
		if (_plugin_ui) {
			app().log().warn("LV2 GUI already embedded, cannot pop up\n");
			return false;
		}

		const PluginModel* const plugin = dynamic_cast<const PluginModel*>(_block->plugin());
		assert(plugin);

		_plugin_ui = plugin->ui(app().world(), _block);

		if (_plugin_ui) {
			GtkWidget* c_widget = (GtkWidget*)_plugin_ui->get_widget();
			_gui_widget = Glib::wrap(c_widget);

			_gui_window = new Gtk::Window();
			if (!_plugin_ui->is_resizable()) {
				_gui_window->set_resizable(false);
			}
			_gui_window->set_title(_block->path() + " UI - Ingen");
			_gui_window->set_role("plugin_ui");
			_gui_window->add(*_gui_widget);
			_gui_widget->show_all();
			set_control_values();

			_gui_window->signal_unmap().connect(
					sigc::mem_fun(this, &NodeModule::on_gui_window_close));
			_gui_window->present();

			return true;
		} else {
			app().log().warn(Raul::fmt("No LV2 GUI for %1%\n") % _block->path());
		}
	}

	return false;
}

void
NodeModule::on_gui_window_close()
{
	delete _gui_window;
	_gui_window = NULL;
	_plugin_ui.reset();
	_gui_widget = NULL;
}

void
NodeModule::set_control_values()
{
	uint32_t index = 0;
	for (const auto& p : _block->ports()) {
		if (app().can_control(p.get())) {
			value_changed(index, p->value());
		}
		++index;
	}
}

bool
NodeModule::on_double_click(GdkEventButton* event)
{
	popup_gui();
	return true;
}

bool
NodeModule::on_event(GdkEvent* ev)
{
	if (ev->type == GDK_BUTTON_PRESS && ev->button.button == 3) {
		return show_menu(&ev->button);
	} else if (ev->type == GDK_2BUTTON_PRESS) {
		return on_double_click(&ev->button);
	}
	return false;
}

void
NodeModule::store_location(double ax, double ay)
{
	const URIs& uris = app().uris();

	const Raul::Atom x(app().forge().make(static_cast<float>(ax)));
	const Raul::Atom y(app().forge().make(static_cast<float>(ay)));

	if (x != _block->get_property(uris.ingen_canvasX) ||
	    y != _block->get_property(uris.ingen_canvasY))
	{
		Resource::Properties remove;
		remove.insert(make_pair(uris.ingen_canvasX,
		                        Resource::Property(uris.wildcard)));
		remove.insert(make_pair(uris.ingen_canvasY,
		                        Resource::Property(uris.wildcard)));
		Resource::Properties add;
		add.insert(make_pair(uris.ingen_canvasX, x));
		add.insert(make_pair(uris.ingen_canvasY, y));
		app().interface()->delta(_block->uri(), remove, add);
	}
}

void
NodeModule::property_changed(const Raul::URI& key, const Raul::Atom& value)
{
	const URIs& uris = app().uris();
	if (value.type() == uris.forge.Float) {
		if (key == uris.ingen_canvasX) {
			move_to(value.get_float(), get_y());
		} else if (key == uris.ingen_canvasY) {
			move_to(get_x(), value.get_float());
		}
	} else if (value.type() == uris.forge.Bool) {
		if (key == uris.ingen_polyphonic) {
			set_stacked(value.get_bool());
		} else if (key == uris.ingen_uiEmbedded) {
			if (value.get_bool() && !_gui_widget) {
				embed_gui(true);
			} else if (!value.get_bool() && _gui_widget) {
				embed_gui(false);
			}
		}
	} else if (value.type() == uris.forge.String) {
		if (key == uris.lv2_name
		    && app().world()->conf().option("human-names").get_bool()) {
			set_label(value.get_string());
		}
	}
}

bool
NodeModule::on_selected(gboolean selected)
{
	GraphWindow* win = app().window_factory()->parent_graph_window(block());
	if (!win) {
		return true;
	}

	if (selected && win->documentation_is_visible()) {
		GraphWindow* win = app().window_factory()->parent_graph_window(block());
		std::string doc;
		bool html = false;
#ifdef HAVE_WEBKIT
		html = true;
#endif
		if (block()->plugin_model()) {
			doc = block()->plugin_model()->documentation(html);
		}
		win->set_documentation(doc, html);
	}

	return true;
}

} // namespace GUI
} // namespace Ingen