/*
    Copyright (C) 2001, 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 <cmath>
#include <cassert>

#include <gtkmm.h>

#include <gtkmm2ext/gtk_ui.h>

#include <ardour/audioplaylist.h>
#include <ardour/audioregion.h>
#include <ardour/audiofilesource.h>
#include <ardour/audio_diskstream.h>
#include <ardour/audio_track.h>
#include <ardour/playlist_templates.h>
#include <ardour/source.h>
#include <ardour/region_factory.h>

#include "audio_streamview.h"
#include "audio_region_view.h"
#include "tape_region_view.h"
#include "audio_time_axis.h"
#include "canvas-waveview.h"
#include "canvas-simplerect.h"
#include "region_selection.h"
#include "selection.h"
#include "public_editor.h"
#include "ardour_ui.h"
#include "crossfade_view.h"
#include "rgb_macros.h"
#include "gui_thread.h"
#include "utils.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Editing;

AudioStreamView::AudioStreamView (AudioTimeAxisView& tv)
	: StreamView (tv)
{
	crossfades_visible = true;
	_waveform_scale = LinearWaveform;
	_waveform_shape = Traditional;
	
	if (tv.is_audio_track())
		stream_base_color = ARDOUR_UI::config()->canvasvar_AudioTrackBase.get();
	else
		stream_base_color = ARDOUR_UI::config()->canvasvar_AudioBusBase.get();
	
	canvas_rect->property_fill_color_rgba() = stream_base_color;
	canvas_rect->property_outline_color_rgba() = RGBA_BLACK;

	_amplitude_above_axis = 1.0;

	use_rec_regions = tv.editor.show_waveforms_recording ();

}

AudioStreamView::~AudioStreamView ()
{
}

int
AudioStreamView::set_height (gdouble h)
{
	/* limit the values to something sane-ish */
	if (h < 10.0 || h > 1000.0) {
		return -1;
	}

	StreamView::set_height(h);

	for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		(*i)->set_height (h);
	}

	return 0;
}

int 
AudioStreamView::set_samples_per_unit (gdouble spp)
{
	StreamView::set_samples_per_unit(spp);

	for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
		(*xi)->set_samples_per_unit (spp);
	}

	return 0;
}

int 
AudioStreamView::set_amplitude_above_axis (gdouble app)
{
	RegionViewList::iterator i;

	if (app < 1.0) {
		return -1;
	}

	_amplitude_above_axis = app;

	for (i = region_views.begin(); i != region_views.end(); ++i) {
		AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
		if (arv)
			arv->set_amplitude_above_axis (app);
	}

	return 0;
}

void
AudioStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wait_for_waves)
{
	AudioRegionView *region_view = 0;
	
	ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_region_view), r));
	
	boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
	
	if (region == 0) {
		return;
	}

	//cerr << "AudioStreamView::add_region_view_internal called region:name = " << region << ":" << region->name();
	for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		if ((*i)->region() == r) {
			//cerr << " region_view = " << (*i) << endl;
			/* great. we already have a AudioRegionView for this Region. use it again. */
			
			(*i)->set_valid (true);

			// this might not be necessary
			AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
			if (arv) {
				arv->set_waveform_scale (_waveform_scale);
				arv->set_waveform_shape (_waveform_shape);
			}
				
			return;
		}
	}
	
	switch (_trackview.audio_track()->mode()) {
	case Normal:
		region_view = new AudioRegionView (canvas_group, _trackview, region, 
						   _samples_per_unit, region_color);
		break;
	case Destructive:
		region_view = new TapeAudioRegionView (canvas_group, _trackview, region, 
						       _samples_per_unit, region_color);
		break;
	default:
		fatal << string_compose (_("programming error: %1"), "illegal track mode in ::add_region_view_internal") << endmsg;
		/*NOTREACHED*/

	}
	region_view->init (region_color, wait_for_waves);
	region_view->set_amplitude_above_axis(_amplitude_above_axis);
	region_views.push_front (region_view);

	/* if its the special single-sample length that we use for rec-regions, make it 
	   insensitive to events 
	*/

	if (region->length() == 1) {
		//region_view->set_sensitive (false);
	}

	/* if this was the first one, then lets query the waveform scale and shape.
	   otherwise, we set it to the current value */
	   
	if (region_views.size() == 1) {
		if (region_view->waveform_logscaled()) {
			_waveform_scale = LogWaveform;
		} else {
			_waveform_scale = LinearWaveform;
		}

		if (region_view->waveform_rectified()) {
			_waveform_shape = Rectified;
		} else {
			_waveform_shape = Traditional;
		}
	}
	else {
		region_view->set_waveform_scale(_waveform_scale);
		region_view->set_waveform_shape(_waveform_shape);
	}
	
	/* follow global waveform setting */

	region_view->set_waveform_visible(_trackview.editor.show_waveforms());

	/* catch regionview going away */
	region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));

	RegionViewAdded (region_view);
}

void
AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
{
	ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));

	boost::shared_ptr<Region> r (weak_r.lock());

	if (!r) {
		return;
	}

	if (!_trackview.session().deletion_in_progress()) {

		for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
			list<CrossfadeView*>::iterator tmp;
			
			tmp = i;
			++tmp;
			
			boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
			if (ar && (*i)->crossfade->involves (ar)) {
				delete *i;
				crossfade_views.erase (i);
			}
			
			i = tmp;
		}
	}


	StreamView::remove_region_view(r);
}

void
AudioStreamView::undisplay_diskstream ()
{
	StreamView::undisplay_diskstream();

	for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		delete *i;
	}

	crossfade_views.clear ();
}

void
AudioStreamView::playlist_modified ()
{
	ENSURE_GUI_THREAD (mem_fun (*this, &AudioStreamView::playlist_modified));

	StreamView::playlist_modified();

	/* make sure xfades are on top and all the regionviews are stacked correctly. */

	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		(*i)->get_canvas_group()->raise_to_top();
	}
}

void
AudioStreamView::playlist_changed (boost::weak_ptr<Diskstream> wptr)
{
	ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), wptr));

	boost::shared_ptr<Diskstream> ds  = wptr.lock();

	if (!ds) {
		return;
	}

	StreamView::playlist_changed(ds);

	boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(ds->playlist());
	if (apl)
		playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
}

void
AudioStreamView::add_crossfade_weak (boost::weak_ptr<Crossfade> crossfade)
{
	boost::shared_ptr<Crossfade> sp (crossfade.lock());

	if (!sp) {
		return;
	}

	add_crossfade (sp);
}

void
AudioStreamView::add_crossfade (boost::shared_ptr<Crossfade> crossfade)
{
	AudioRegionView* lview = 0;
	AudioRegionView* rview = 0;

	/* we do not allow shared_ptr<T> to be bound to slots */
	
	ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade_weak), boost::weak_ptr<Crossfade> (crossfade)));

	/* first see if we already have a CrossfadeView for this Crossfade */

	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		if ((*i)->crossfade == crossfade) {
			if (!crossfades_visible) {
				(*i)->hide();
			} else {
				(*i)->show ();
			}
			(*i)->set_valid (true);
			return;
		}
	}

	/* create a new one */

	for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);

		if (!lview && arv && (arv->region() == crossfade->out())) {
			lview = arv;
		}
		if (!rview && arv && (arv->region() == crossfade->in())) {
			rview = arv;
		}
	}

	CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
					       _trackview,
					        crossfade,
					       _samples_per_unit,
					       region_color,
					       *lview, *rview);

	crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
	crossfade_views.push_back (cv);

	if (!Config->get_xfades_visible() || !crossfades_visible) {
		cv->hide ();
	}
}

void
AudioStreamView::remove_crossfade (boost::shared_ptr<Crossfade> xfade)
{
	ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));

	for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		if ((*i)->crossfade == xfade) {
			delete *i;
			crossfade_views.erase (i);
			break;
		}
	}
}

void
AudioStreamView::redisplay_diskstream ()
{
	//cerr << "AudioStreamView::redisplay_diskstream () called" << endl;
	list<RegionView *>::iterator i, tmp;
	list<CrossfadeView*>::iterator xi, tmpx;

	for (i = region_views.begin(); i != region_views.end(); ++i) {
		(*i)->set_valid (false);
	}

	for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
		(*xi)->set_valid (false);
		if ((*xi)->visible()) {
			(*xi)->show ();
		}
	}

	if (_trackview.is_audio_track()) {
		_trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);

		boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_trackview.get_diskstream()->playlist());
		if (apl)
			apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
	}

	for (i = region_views.begin(); i != region_views.end(); ) {
		tmp = i;
		tmp++;

		if (!(*i)->is_valid()) {
			delete *i;
			region_views.erase (i);
		} 

		i = tmp;
	}

	for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
		tmpx = xi;
		tmpx++;

		if (!(*xi)->valid()) {
			delete *xi;
			crossfade_views.erase (xi);
		}

		xi = tmpx;
	}

	/* now fix layering */

	for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		region_layered (*i);
	}
}

void
AudioStreamView::set_show_waveforms (bool yn)
{
	for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
		if (arv) {
			arv->set_waveform_visible (yn);
		}
	}
}

void
AudioStreamView::set_waveform_shape (WaveformShape shape)
{
	for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
		if (arv)
			arv->set_waveform_shape (shape);
	}
	_waveform_shape = shape;
}		

void
AudioStreamView::set_waveform_scale (WaveformScale scale)
{
	for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
		AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
		if (arv) 
			arv->set_waveform_scale (scale);
	}
	_waveform_scale = scale;
}		

void
AudioStreamView::setup_rec_box (bool looped)
{
	if (_trackview.session().transport_rolling()) {
		if (!rec_active && !looped && 
		    _trackview.session().record_status() == Session::Recording && 
		    _trackview.get_diskstream()->record_enabled()) {
			
			/* start a new rec box */

			//boost::shared_ptr<AudioTrack> at = _trackview.audio_track ();
			//boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
			//nframes_t frame_pos = ds->current_capture_start ();
			//gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
			//gdouble xend;
			//uint32_t fill_color;

			//xend = xstart + 2;
			//fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
			/* make the recording rect translucent to allow
			   the user to see the peak data coming in, etc.
			*/
			//fill_color = UINT_RGBA_CHANGE_A (fill_color, 100);
			
			//ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
			//rec_rect->property_x1() = xstart;
			//rec_rect->property_y1() = 1.0;
			//rec_rect->property_x2() = xend;
			//rec_rect->property_y2() = (double) _trackview.current_height() - 1;
			//rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TimeAxisFrame.get();
			//rec_rect->property_outline_what() = 0x1 | 0x2 | 0x4 | 0x8;
			//rec_rect->property_fill_color_rgba() = fill_color;
			
			//RecBoxInfo recbox;
			//recbox.rectangle = rec_rect;
			//recbox.start = _trackview.session().transport_frame();
			//recbox.length = 0;
			
			//rec_rects.push_back (recbox);
			
			screen_update_connection.disconnect();
			screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));	
			rec_updating = true;
			rec_active = true;

		} else if (looped || 
			   (rec_active && (_trackview.session().record_status() != Session::Recording ||
					   !_trackview.get_diskstream()->record_enabled()))) {
			screen_update_connection.disconnect();
			rec_active = false;
			rec_updating = false;
		}
		
	} else {
		if (!rec_rects.empty()) {
			/* disconnect rapid update */
			screen_update_connection.disconnect();

			rec_updating = false;
			rec_active = false;
			
			//cerr << "\tclear " << rec_rects.size() << " rec rects\n";

			/* transport stopped, clear boxes */
			//for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
			//	RecBoxInfo &rect = (*iter);
			//	delete rect.rectangle;
			//}
			//
			//rec_rects.clear();
		}
	}
}



void
AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
{
	for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		((*i)->*pmf) ();
	}
}

void
AudioStreamView::show_all_xfades ()
{
	foreach_crossfadeview (&CrossfadeView::show);
	crossfades_visible = true;
}

void
AudioStreamView::hide_all_xfades ()
{
	foreach_crossfadeview (&CrossfadeView::hide);
	crossfades_visible = false;
}

void
AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
{
	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		if ((*i)->crossfade->involves (rv.audio_region())) {
			(*i)->fake_hide ();
		}
	}
}

void
AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
{
	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
		if ((*i)->crossfade->involves (rv.audio_region()) && (*i)->visible()) {
			(*i)->show ();
		}
	}
}

void
AudioStreamView::color_handler ()
{
	if (_trackview.is_track()) {
		canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_AudioTrackBase.get();
	}

	if (!_trackview.is_track()) {
		canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_AudioBusBase.get();
	}
}

void
AudioStreamView::start_lcr_blinking ()
{
	if (_trackview.is_audio_track()) {
		_trackview.get_diskstream()->playlist()->foreach_region (static_cast<AudioStreamView*>(this), &AudioStreamView::get_my_blink_on);
	}
}

void
AudioStreamView::stop_lcr_blinking ()
{
	if (_trackview.is_audio_track()) {
		_trackview.get_diskstream()->playlist()->foreach_region (static_cast<AudioStreamView*>(this), &AudioStreamView::get_my_blink_off);
	}
}

void
AudioStreamView::get_my_blink_on (boost::shared_ptr<Region> r)
{
	boost::shared_ptr<AudioTrack> at = _trackview.audio_track ();
	boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();

	std::list<boost::shared_ptr<Region> > lcr = ds->last_capture_regions();

	for (std::list<boost::shared_ptr<Region> >::iterator i = lcr.begin(); i != lcr.end(); i++) {
		if ((*i) == r) {
			for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
				if ((*i)->region() == r) {
					(*i)->setup_blink (true);
				}
			}
		}
	}
}

void
AudioStreamView::get_my_blink_off (boost::shared_ptr<Region> r)
{
	boost::shared_ptr<AudioTrack> at = _trackview.audio_track ();
	boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();

	std::list<boost::shared_ptr<Region> > lcr = ds->last_capture_regions();

	for (std::list<boost::shared_ptr<Region> >::iterator i = lcr.begin(); i != lcr.end(); i++) {
		if ((*i) == r) {
			for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
				if ((*i)->region() == r) {
					(*i)->setup_blink (false);
				}
			}
		}
	}
}