/*
 * CINELERRA
 * Copyright (C) 2016-2020 William Morrow
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

// shared between parent/child fork
#include "language.h"
#include "pluginlv2ui.h"

#include <gtk/gtk.h>
#include <gdk/gdk.h>

#include <ctype.h>
#include <string.h>

void PluginLV2UI::update_value(int idx, uint32_t bfrsz, uint32_t typ, const void *bfr)
{
	if( idx >= config.nb_ports ) return;
	for( int i=0, sz=config.size(); i<sz; ++i ) {
		PluginLV2Client_Opt *opt = config[i];
		if( opt->idx == idx ) {
			opt->set_value(*(const float*)bfr);
			updates |= UPDATE_HOST;
			break;
		}
	}
}
void PluginLV2UI::write_from_ui(void *the, uint32_t idx,
		uint32_t bfrsz, uint32_t typ, const void *bfr)
{
	((PluginLV2UI*)the)->update_value(idx, bfrsz, typ, bfr);
}

uint32_t PluginLV2UI::port_index(void* obj, const char* sym)
{
	PluginLV2UI *the = (PluginLV2UI*)obj;
	for( int i=0, sz=the->config.size(); i<sz; ++i ) {
		PluginLV2Client_Opt *opt = the->config[i];
		if( !strcmp(sym, opt->sym) ) return opt->idx;
	}
	return UINT32_MAX;
}

void PluginLV2UI::update_control(int idx, uint32_t bfrsz, uint32_t typ, const void *bfr)
{
	if( !sinst || idx >= config.nb_ports ) return;
	suil_instance_port_event(sinst, idx, bfrsz, typ, bfr);
}


uint32_t PluginLV2UI::uri_to_id(LV2_URID_Map_Handle handle, const char *map, const char *uri)
{
	return ((PluginLV2UriTable *)handle)->map(uri);
}

LV2_URID PluginLV2UI::uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
{
	return ((PluginLV2UriTable *)handle)->map(uri);
}

const char *PluginLV2UI::uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
{
	return ((PluginLV2UriTable *)handle)->unmap(urid);
}

void PluginLV2UI::lv2ui_instantiate(void *parent)
{
	if ( !ui_host ) {
		ui_host = suil_host_new(
			PluginLV2UI::write_from_ui,
			PluginLV2UI::port_index,
			0, 0);
//		suil_host_set_touch_func(ui_host, cb_touch);
	}

	features.remove();  // remove terminating zero
	ui_features = features.size();
	LV2_Handle lilv_handle = lilv_instance_get_handle(inst);
	features.append(new Lv2Feature(NS_EXT "instance-access", lilv_handle));
	const LV2_Descriptor *lilv_desc = lilv_instance_get_descriptor(inst);
	ext_data = new LV2_Extension_Data_Feature();
	ext_data->data_access = lilv_desc->extension_data;
	features.append(new Lv2Feature(LV2_DATA_ACCESS_URI, ext_data));
	features.append(new Lv2Feature(LV2_UI__parent, parent));
	features.append(new Lv2Feature(LV2_UI__idleInterface, 0));
	features.append(new Lv2Feature(LV2_EXTERNAL_UI_URI, &extui_host));
	features.append(new Lv2Feature(LV2_EXTERNAL_UI_URI__KX__Host, &extui_host));
	features.append(0); // add new terminating zero

	const char* bundle_uri  = lilv_node_as_uri(lilv_ui_get_bundle_uri(lilv_ui));
	char*       bundle_path = lilv_file_uri_parse(bundle_uri, NULL);
	const char* binary_uri  = lilv_node_as_uri(lilv_ui_get_binary_uri(lilv_ui));
	char*       binary_path = lilv_file_uri_parse(binary_uri, NULL);
	sinst = suil_instance_new(ui_host, this, ui_type,
		lilv_node_as_uri(lilv_plugin_get_uri(lilv)),
		lilv_node_as_uri(lilv_ui_get_uri(lilv_ui)),
		lilv_node_as_uri(lilv_type),
		bundle_path, binary_path, features);

	lilv_free(binary_path);
	lilv_free(bundle_path);
}

bool PluginLV2UI::lv2ui_resizable()
{
	if( !lilv_ui ) return false;
	const LilvNode* s   = lilv_ui_get_uri(lilv_ui);
	LilvNode *p   = lilv_new_uri(world, LV2_CORE__optionalFeature);
	LilvNode *fs  = lilv_new_uri(world, LV2_UI__fixedSize);
	LilvNode *nrs = lilv_new_uri(world, LV2_UI__noUserResize);
	LilvNodes *fs_matches = lilv_world_find_nodes(world, s, p, fs);
	LilvNodes *nrs_matches = lilv_world_find_nodes(world, s, p, nrs);
	lilv_nodes_free(nrs_matches);
	lilv_nodes_free(fs_matches);
	lilv_node_free(nrs);
	lilv_node_free(fs);
	lilv_node_free(p);
	return !fs_matches && !nrs_matches;
}

//force= 1:ctls(all),gui(all)  0:changed(ctls)  -1:gui(all)
int PluginLV2UI::update_lv2_input(float *vals, int force)
{
	int ret = 0;
	float *ctls = config.ctls;
	for( int i=0; i<config.size(); ++i ) {
		int idx = config[i]->idx;
		float val = vals[idx];
		if( !force && ctls[idx] == val ) continue;
		if( force >= 0 ) {
			ctls[idx] = val;
			++ret;
		}
		if( force )
			update_control(idx, sizeof(val), 0, &val);
	}
	return ret;
}

void PluginLV2UI::update_lv2_output()
{
	int *ports = config.ports;
	float *ctls = config.ctls;
	for( int i=0; i<config.nb_ports; ++i ) {
		if( !(ports[i] & PORTS_UPDATE) ) continue;
		ports[i] &= ~PORTS_UPDATE;
		update_control(i, sizeof(ctls[i]), 0, &ctls[i]);
	}
}

void PluginLV2UI::run_lilv(int samples)
{
	float ctls[config.nb_ports];
	for( int i=0; i<config.nb_ports; ++i ) ctls[i] = config.ctls[i];

	lilv_instance_run(inst, samples);

	if( worker_iface ) worker_responses();

	for( int i=0; i<config.nb_ports; ++i ) {
		if( !(config.ports[i] & PORTS_OUTPUT) ) continue;
		if( !(config.ports[i] & PORTS_CONTROL) ) continue;
		if( config.ctls[i] == ctls[i] ) continue;
		config.ports[i] |= PORTS_UPDATE;
		updates |= UPDATE_PORTS;
	}
}

void PluginLV2ChildUI::start_gui()
{
	if( gui ) gui->start_gui();
	update_lv2_input(config.ctls, 1);
	connect_ports(config, PORTS_CONTROL | PORTS_ATOM);
	int n = 0;

	updates = 0;
	run_lilv(n);
	if( gui ) {
		send_host(LV2_SHOW, 0, 0);
		hidden = 0;
	}
}

void PluginLV2UI::update_host()
{
// ignore update
	if( running < 0 ) { running = 1;  return; }
	send_host(LV2_UPDATE, config.ctls, sizeof(float)*config.nb_ports);
}


static void lv2ui_extui_host_ui_closed(void *p)
{
	PluginLV2UI *ui = (PluginLV2UI *)p;
	ui->hidden = -1;
}

int PluginLV2ChildUI::init_ui(const char *path, int sample_rate, int bfrsz)
{
	char *title = PluginLV2UI::title;
	if( load_lv2(path, title) ) return 1;
	if( init_lv2(config, sample_rate, bfrsz) ) return 1;

	lilv_uis = lilv_plugin_get_uis(lilv);
	if( !gui && lilv_uis && wgt_type ) {
		LilvNode *gui_type = lilv_new_uri(world, wgt_type);
		LILV_FOREACH(uis, i, lilv_uis) {
			const LilvUI *ui = lilv_uis_get(lilv_uis, i);
			if( lilv_ui_is_supported(ui, suil_ui_supported, gui_type, &lilv_type)) {
				extui_host.ui_closed = lv2ui_extui_host_ui_closed;
				gui = new PluginLV2ChildWgtUI(this);
				lilv_ui = ui;
				ui_type = wgt_type;
				break;
			}
		}
		lilv_node_free(gui_type);
	}
	if( !gui && lilv_uis && gtk_type ) {
		LilvNode *gui_type = lilv_new_uri(world, gtk_type);
		LILV_FOREACH(uis, i, lilv_uis) {
			const LilvUI *ui = lilv_uis_get(lilv_uis, i);
			if( lilv_ui_is_supported(ui, suil_ui_supported, gui_type, &lilv_type)) {
				gui = new PluginLV2ChildGtkUI(this);
				lilv_ui = ui;
				ui_type = gtk_type;
				break;
			}
		}
		lilv_node_free(gui_type);
		ui_type = gtk_type;
	}

	lilv_instance_activate(inst);
	return 0;
}

void PluginLV2ChildUI::reset_gui()
{
	if( gui ) gui->reset_gui();
	if( sinst )     { suil_instance_free(sinst);  sinst = 0; }
	if( ui_host )   { suil_host_free(ui_host);    ui_host = 0; }

	while( features.size() > ui_features ) features.remove_object();
	features.append(0);
	send_host(LV2_HIDE, 0, 0);
	hidden = 1;
}

// main loop
int PluginLV2ChildUI::run_ui()
{
	double last_time = 0;
	int64_t frame_usecs = 1e6 / refreshrate;
	running = 1;
	done = 0;
	while( !done ) {
		if( hidden < 0 ) {
			if( gui ) gui->top_level = 0;
			reset_gui();
			if( !is_forked() ) {
				done = -1;
				break;
			}
			hidden = 1;
		}
		if( updates ) {
			if( (updates & UPDATE_PORTS) )
				update_lv2_output();
			if( (updates & UPDATE_HOST) )
				update_host();
			updates = 0;
		}
		struct timeval tv;  gettimeofday(&tv, 0);
		double t = tv.tv_sec + tv.tv_usec / 1e6;
		double dt = t - last_time;  last_time = t;
		int64_t usec = frame_usecs - dt*1e6;
		if( usec < 0 ) usec = 0;
		if( child_iteration(usec) < 0 )
			done = 1;
	}
	running = 0;
	return 0;
}

void PluginLV2ChildUI::run_buffer(int shmid)
{
	if( !shm_buffer(shmid) ) return;
	map_buffer();
	connect_ports(config, PORTS_ALL);
	run_lilv(shm_bfr->samples);
	shm_bfr->done = 1;
}

int PluginLV2ChildUI::child_iteration(int64_t usec)
{
	int ret = 0;
	if( is_forked() )
		ret = read_child(usec);
	else if( gui )
		usleep(usec);
	else
		ret = -1;

	if( ret > 0 ) {
		switch( child_token ) {
		case LV2_OPEN: {
			open_bfr_t *open_bfr = (open_bfr_t *)child_data;
			if( init_ui(open_bfr->path, open_bfr->sample_rate, open_bfr->bfrsz) ) {
				printf("lv2ui: unable to init: %s\n", open_bfr->path);
				exit(1);
			}
			break; }
		case LV2_LOAD: {
			float *vals = (float *)child_data;
			update_lv2_input(vals, 1);
			break; }
		case LV2_CONFIG: {
			float *vals = (float *)child_data;
			update_lv2_input(vals, 0);
			break; }
		case LV2_UPDATE: {
			float *vals = (float *)child_data;
			update_lv2_input(vals, -1);
			break; }
		case LV2_SHOW: {
			start_gui();
			break; }
		case LV2_HIDE: {
			reset_gui();
			break; }
		case LV2_SHMID: {
			int shmid = *(int *)child_data;
			run_buffer(shmid);
			send_parent(LV2_SHMID, 0, 0);
			break; }
		case EXIT_CODE:
			return -1;
		}
	}
	if( ret >= 0 && gui )
		gui->handle_child();
	return ret;
}

int PluginLV2ChildUI::send_host(int64_t token, const void *data, int bytes)
{
	return is_forked() ? send_parent(token, data, bytes) : 0;
}

PluginLV2GUI::PluginLV2GUI(PluginLV2ChildUI *child_ui)
{
	this->child_ui = child_ui;
	top_level = 0;
}

PluginLV2GUI::~PluginLV2GUI()
{
}

PluginLV2ChildGtkUI::PluginLV2ChildGtkUI(PluginLV2ChildUI *child_ui)
 : PluginLV2GUI(child_ui)
{
	gtk_set_locale();
	gtk_init(&child_ui->ac, &child_ui->av);
}

PluginLV2ChildGtkUI::~PluginLV2ChildGtkUI()
{
}

void PluginLV2ChildGtkUI::reset_gui()
{
	GtkWidget *top_level = (GtkWidget *)this->top_level;
	if( top_level ) { gtk_widget_destroy(top_level); this->top_level = 0; }
}

static void lilv_gtk_destroy(GtkWidget* widget, gpointer data)
{
	PluginLV2ChildGtkUI *gui = (PluginLV2ChildGtkUI*)data;
	gui->child_ui->hidden = -1;
}

void PluginLV2ChildGtkUI::start_gui()
{
	this->top_level = (void *)gtk_window_new(GTK_WINDOW_TOPLEVEL);
	GtkWidget *top_level = (GtkWidget *)this->top_level;
	g_signal_connect(top_level, "destroy", G_CALLBACK(lilv_gtk_destroy), this);
	char *title = child_ui->PluginLV2UI::title;
	gtk_window_set_title(GTK_WINDOW(top_level), title);

	GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
	gtk_window_set_role(GTK_WINDOW(top_level), "plugin_ui");
	gtk_container_add(GTK_CONTAINER(top_level), vbox);

	GtkWidget *alignment = gtk_alignment_new(0.5, 0.5, 1.0, 1.0);
	gtk_box_pack_start(GTK_BOX(vbox), alignment, TRUE, TRUE, 0);
	gtk_widget_show(alignment);
	child_ui->lv2ui_instantiate(alignment);
	GtkWidget* widget = (GtkWidget*)suil_instance_get_widget(child_ui->sinst);
	gtk_container_add(GTK_CONTAINER(alignment), widget);
	gtk_window_set_resizable(GTK_WINDOW(top_level), child_ui->lv2ui_resizable());
	gtk_widget_show_all(vbox);
	gtk_widget_grab_focus(widget);
	gtk_window_present(GTK_WINDOW(top_level));
}

int PluginLV2ChildGtkUI::handle_child()
{
	if( gtk_events_pending() ) {
		gtk_main_iteration();
	}
	return 1;
}

PluginLV2ChildWgtUI::PluginLV2ChildWgtUI(PluginLV2ChildUI *child_ui)
 : PluginLV2GUI(child_ui)
{
}

PluginLV2ChildWgtUI::~PluginLV2ChildWgtUI()
{
}

void PluginLV2ChildWgtUI::reset_gui()
{
	lv2_external_ui *top_level = (lv2_external_ui *)this->top_level;
	if( top_level ) { LV2_EXTERNAL_UI_HIDE(top_level); this->top_level = 0; }
}

void PluginLV2ChildWgtUI::start_gui()
{
	child_ui->lv2ui_instantiate(0);
	this->top_level = (void *)suil_instance_get_widget(child_ui->sinst);
	lv2_external_ui *top_level = (lv2_external_ui *)this->top_level;
	if( top_level ) LV2_EXTERNAL_UI_SHOW(top_level);
}

int PluginLV2ChildWgtUI::handle_child()
{
	lv2_external_ui *top_level = (lv2_external_ui *)this->top_level;
	if( top_level )
		LV2_EXTERNAL_UI_RUN(top_level);
	return 1;
}