/*
    Copyright (C) 2000-2006 Paul Davis

    This program 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.

    This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <cstdlib>
#include <cmath>
#include <cassert>

#include <algorithm>
#include <string>
#include <vector>

#include <sigc++/bind.h>

#include "pbd/error.h"
#include "pbd/stl_delete.h"
#include "pbd/memento_command.h"

#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/selector.h>
#include <gtkmm2ext/stop_signal.h>
#include <gtkmm2ext/bindable_button.h>
#include <gtkmm2ext/utils.h>

#include "ardour/amp.h"
#include "ardour/audioplaylist.h"
#include "ardour/event_type_map.h"
#include "ardour/location.h"
#include "ardour/panner.h"
#include "ardour/playlist.h"
#include "ardour/processor.h"
#include "ardour/profile.h"
#include "ardour/session.h"
#include "ardour/session_playlist.h"
#include "ardour/utils.h"

#include "ardour_ui.h"
#include "audio_time_axis.h"
#include "automation_line.h"
#include "canvas_impl.h"
#include "crossfade_view.h"
#include "enums.h"
#include "gui_thread.h"
#include "automation_time_axis.h"
#include "keyboard.h"
#include "playlist_selector.h"
#include "prompter.h"
#include "public_editor.h"
#include "audio_region_view.h"
#include "simplerect.h"
#include "audio_streamview.h"
#include "utils.h"

#include "ardour/audio_track.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Gtk;
using namespace Editing;

AudioTimeAxisView::AudioTimeAxisView (PublicEditor& ed, Session* sess, boost::shared_ptr<Route> rt, Canvas& canvas)
	: AxisView(sess)
	, RouteTimeAxisView(ed, sess, rt, canvas)
{
	// Make sure things are sane...
	assert(!is_track() || is_audio_track());

	subplugin_menu.set_name ("ArdourContextMenu");

	_view = new AudioStreamView (*this);

	ignore_toggle = false;

	mute_button->set_active (false);
	solo_button->set_active (false);

	if (is_audio_track()) {
		controls_ebox.set_name ("AudioTrackControlsBaseUnselected");
	} else { // bus
		controls_ebox.set_name ("AudioBusControlsBaseUnselected");
	}

	ensure_xml_node ();

	set_state (*xml_node, Stateful::loading_state_version);

	/* if set_state above didn't create a gain automation child, we need to make one */
	if (automation_child (GainAutomation) == 0) {
		create_automation_child (GainAutomation, false);
	}

	if (_route->panner()) {
		_route->panner()->Changed.connect (*this, invalidator (*this), 
                                                   boost::bind (&AudioTimeAxisView::ensure_pan_views, this, false), gui_context());
	}

	/* map current state of the route */

	processors_changed (RouteProcessorChange ());
	reset_processor_automation_curves ();
	ensure_pan_views (false);
	update_control_names ();

	if (is_audio_track()) {

		/* ask for notifications of any new RegionViews */
		_view->RegionViewAdded.connect (sigc::mem_fun(*this, &AudioTimeAxisView::region_view_added));

		if (!_editor.have_idled()) {
			/* first idle will do what we need */
		} else {
			first_idle ();
		}

	} else {
		post_construct ();
	}
}

AudioTimeAxisView::~AudioTimeAxisView ()
{
}

void
AudioTimeAxisView::first_idle ()
{
	_view->attach ();
	post_construct ();
}

AudioStreamView*
AudioTimeAxisView::audio_view()
{
	return dynamic_cast<AudioStreamView*>(_view);
}

guint32
AudioTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
{
	ensure_xml_node ();
	xml_node->add_property ("shown-editor", "yes");

	return TimeAxisView::show_at (y, nth, parent);
}

void
AudioTimeAxisView::hide ()
{
	ensure_xml_node ();
	xml_node->add_property ("shown-editor", "no");

	TimeAxisView::hide ();
}


void
AudioTimeAxisView::append_extra_display_menu_items ()
{
	using namespace Menu_Helpers;

	MenuList& items = display_menu->items();

	// crossfade stuff
	if (!Profile->get_sae()) {
		items.push_back (MenuElem (_("Hide All Crossfades"), sigc::mem_fun(*this, &AudioTimeAxisView::hide_all_xfades)));
		items.push_back (MenuElem (_("Show All Crossfades"), sigc::mem_fun(*this, &AudioTimeAxisView::show_all_xfades)));
	}
}

void
AudioTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
{
	if (param.type() == GainAutomation) {

		boost::shared_ptr<AutomationControl> c = _route->gain_control();
		if (!c) {
			error << "Route has no gain automation, unable to add automation track view." << endmsg;
			return;
		}

		gain_track.reset (new AutomationTimeAxisView (_session,
							      _route, _route->amp(), c,
							      _editor,
							      *this,
							      false,
							      parent_canvas,
							      _route->amp()->describe_parameter(param)));

		add_automation_child(Evoral::Parameter(GainAutomation), gain_track, show);

	} else if (param.type() == PanAutomation) {

		ensure_xml_node ();
		ensure_pan_views (show);

	} else {
		error << "AudioTimeAxisView: unknown automation child " << EventTypeMap::instance().to_symbol(param) << endmsg;
	}
}

/** Ensure that we have the appropriate AutomationTimeAxisViews for the
 *  panners that we have.
 *
 *  @param show true to show any new views that we create, otherwise false.
 */
void
AudioTimeAxisView::ensure_pan_views (bool show)
{
	if (!_route->panner()) {
		return;
	}

	const set<Evoral::Parameter>& params = _route->panner()->what_can_be_automated();
	set<Evoral::Parameter>::iterator p;

	for (p = params.begin(); p != params.end(); ++p) {
		boost::shared_ptr<ARDOUR::AutomationControl> pan_control
			= boost::dynamic_pointer_cast<ARDOUR::AutomationControl>(
				_route->panner()->control(*p));

		if (pan_control->parameter().type() == NullAutomation) {
			error << "Pan control has NULL automation type!" << endmsg;
			continue;
		}

		if (automation_child (pan_control->parameter ()).get () == 0) {

			/* we don't already have an AutomationTimeAxisView for this parameter */

			std::string const name = _route->panner()->describe_parameter (pan_control->parameter ());

			boost::shared_ptr<AutomationTimeAxisView> t (
				new AutomationTimeAxisView (_session,
							    _route, _route->panner(), pan_control,
							    _editor,
							    *this,
							    false,
							    parent_canvas,
							    name)
				);

			pan_tracks.push_back (t);
			add_automation_child (*p, t, show);
		}
	}
}

void
AudioTimeAxisView::update_gain_track_visibility ()
{
	bool const showit = gain_automation_item->get_active();

	if (showit != gain_track->marked_for_display()) {
		if (showit) {
			gain_track->set_marked_for_display (true);
			gain_track->canvas_display()->show();
			gain_track->canvas_background()->show();
			gain_track->get_state_node()->add_property ("shown", X_("yes"));
		} else {
			gain_track->set_marked_for_display (false);
			gain_track->hide ();
			gain_track->get_state_node()->add_property ("shown", X_("no"));
		}

		/* now trigger a redisplay */

		if (!no_redraw) {
			 _route->gui_changed (X_("visible_tracks"), (void *) 0); /* EMIT_SIGNAL */
		}
	}
}

void
AudioTimeAxisView::update_pan_track_visibility ()
{
	bool const showit = pan_automation_item->get_active();

	for (list<boost::shared_ptr<AutomationTimeAxisView> >::iterator i = pan_tracks.begin(); i != pan_tracks.end(); ++i) {

		if (showit != (*i)->marked_for_display()) {
			if (showit) {
				(*i)->set_marked_for_display (true);
				(*i)->canvas_display()->show();
				(*i)->canvas_background()->show();
				(*i)->get_state_node()->add_property ("shown", X_("yes"));
			} else {
				(*i)->set_marked_for_display (false);
				(*i)->hide ();
				(*i)->get_state_node()->add_property ("shown", X_("no"));
			}
			
			/* now trigger a redisplay */
			if (!no_redraw) {
				_route->gui_changed (X_("visible_tracks"), (void *) 0); /* EMIT_SIGNAL */
			}
		}
	}
}

void
AudioTimeAxisView::show_all_automation ()
{
	no_redraw = true;

	RouteTimeAxisView::show_all_automation ();

	no_redraw = false;

	_route->gui_changed ("track_height", (void *) 0); /* EMIT_SIGNAL */
}

void
AudioTimeAxisView::show_existing_automation ()
{
	no_redraw = true;

	RouteTimeAxisView::show_existing_automation ();

	no_redraw = false;

	_route->gui_changed ("track_height", (void *) 0); /* EMIT_SIGNAL */
}

void
AudioTimeAxisView::hide_all_automation ()
{
	no_redraw = true;

	RouteTimeAxisView::hide_all_automation();

	no_redraw = false;
	_route->gui_changed ("track_height", (void *) 0); /* EMIT_SIGNAL */
}

void
AudioTimeAxisView::show_all_xfades ()
{
	AudioStreamView* asv = audio_view();

	if (asv) {
		asv->show_all_xfades ();
	}
}

void
AudioTimeAxisView::hide_all_xfades ()
{
	AudioStreamView* asv = audio_view();

	if (asv) {
		asv->hide_all_xfades ();
	}
}

void
AudioTimeAxisView::hide_dependent_views (TimeAxisViewItem& tavi)
{
	AudioStreamView* asv = audio_view();
	AudioRegionView* rv;

	if (asv && (rv = dynamic_cast<AudioRegionView*>(&tavi)) != 0) {
		asv->hide_xfades_involving (*rv);
	}
}

void
AudioTimeAxisView::reveal_dependent_views (TimeAxisViewItem& tavi)
{
	AudioStreamView* asv = audio_view();
	AudioRegionView* rv;

	if (asv && (rv = dynamic_cast<AudioRegionView*>(&tavi)) != 0) {
		asv->reveal_xfades_involving (*rv);
	}
}

void
AudioTimeAxisView::route_active_changed ()
{
	RouteTimeAxisView::route_active_changed ();
	update_control_names ();
}


/**
 *    Set up the names of the controls so that they are coloured
 *    correctly depending on whether this route is inactive or
 *    selected.
 */

void
AudioTimeAxisView::update_control_names ()
{
	if (is_audio_track()) {
		if (_route->active()) {
			controls_base_selected_name = "AudioTrackControlsBaseSelected";
			controls_base_unselected_name = "AudioTrackControlsBaseUnselected";
		} else {
			controls_base_selected_name = "AudioTrackControlsBaseInactiveSelected";
			controls_base_unselected_name = "AudioTrackControlsBaseInactiveUnselected";
		}
	} else {
		if (_route->active()) {
			controls_base_selected_name = "BusControlsBaseSelected";
			controls_base_unselected_name = "BusControlsBaseUnselected";
		} else {
			controls_base_selected_name = "BusControlsBaseInactiveSelected";
			controls_base_unselected_name = "BusControlsBaseInactiveUnselected";
		}
	}

	if (get_selected()) {
		controls_ebox.set_name (controls_base_selected_name);
	} else {
		controls_ebox.set_name (controls_base_unselected_name);
	}
}

void
AudioTimeAxisView::build_automation_action_menu ()
{
	using namespace Menu_Helpers;

	RouteTimeAxisView::build_automation_action_menu ();

	MenuList& automation_items = automation_action_menu->items ();

	automation_items.push_back (CheckMenuElem (_("Fader"), sigc::mem_fun (*this, &AudioTimeAxisView::update_gain_track_visibility)));
	gain_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
	gain_automation_item->set_active (gain_track->marked_for_display ());

	automation_items.push_back (CheckMenuElem (_("Pan"), sigc::mem_fun (*this, &AudioTimeAxisView::update_pan_track_visibility)));
	pan_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
	pan_automation_item->set_active (pan_tracks.front()->marked_for_display ());
}

void
AudioTimeAxisView::add_processor_to_subplugin_menu (boost::weak_ptr<Processor> wp)
{
	/* we use this override to veto the Amp processor from the plugin menu,
	   as its automation lane can be accessed using the special "Fader" menu
	   option
	*/
	
	boost::shared_ptr<Processor> p = wp.lock ();
	if (!p) {
		return;
	}

	if (boost::dynamic_pointer_cast<Amp> (p) == 0) {
		RouteTimeAxisView::add_processor_to_subplugin_menu (wp);
	}
}