/*************************************************************************/
/*  progress_dialog.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "progress_dialog.h"
#include "main/main.h"
#include "message_queue.h"
#include "os/os.h"
#include "editor_scale.h"
void BackgroundProgress::_add_task(const String& p_task,const String& p_label, int p_steps) {

	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(tasks.has(p_task));
	Task t;
	t.hb = memnew( HBoxContainer );
	Label *l=memnew( Label );
	l->set_text(p_label+" ");
	t.hb->add_child(l);
	t.progress = memnew( ProgressBar );
	t.progress->set_max(p_steps);
	t.progress->set_value(p_steps);
	Control *ec = memnew( Control );
	ec->set_h_size_flags(SIZE_EXPAND_FILL);
	ec->set_v_size_flags(SIZE_EXPAND_FILL);
	t.progress->set_area_as_parent_rect();
	ec->add_child(t.progress);
	ec->set_custom_minimum_size(Size2(80,5)*EDSCALE);
	t.hb->add_child(ec);

	add_child(t.hb);

	tasks[p_task]=t;

}

void BackgroundProgress::_update() {

	_THREAD_SAFE_METHOD_

	for (Map<String,int>::Element *E=updates.front();E;E=E->next()) {

		if (tasks.has(E->key())) {
			_task_step(E->key(),E->get());
		}
	}

	updates.clear();



}


void BackgroundProgress::_task_step(const String& p_task, int p_step){

	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!tasks.has(p_task));

	Task &t=tasks[p_task];
	if (p_step<0)
		t.progress->set_value(t.progress->get_value()+1);
	else
		t.progress->set_value(p_step);

}
void BackgroundProgress::_end_task(const String& p_task){

	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!tasks.has(p_task));
	Task &t=tasks[p_task];

	memdelete(t.hb);
	tasks.erase(p_task);
}

void BackgroundProgress::_bind_methods(){

	ClassDB::bind_method("_add_task",&BackgroundProgress::_add_task);
	ClassDB::bind_method("_task_step",&BackgroundProgress::_task_step);
	ClassDB::bind_method("_end_task",&BackgroundProgress::_end_task);
	ClassDB::bind_method("_update",&BackgroundProgress::_update);

}

void BackgroundProgress::add_task(const String& p_task,const String& p_label, int p_steps){

	MessageQueue::get_singleton()->push_call(this,"_add_task",p_task,p_label,p_steps);
}
void BackgroundProgress::task_step(const String& p_task, int p_step){

	//this code is weird, but it prevents deadlock.
	bool no_updates;
	{
		_THREAD_SAFE_METHOD_
		no_updates=updates.empty();
	}

	if (no_updates)
		MessageQueue::get_singleton()->push_call(this,"_update");

	{
		_THREAD_SAFE_METHOD_
		updates[p_task]=p_step;
	}

}

void BackgroundProgress::end_task(const String& p_task){

	MessageQueue::get_singleton()->push_call(this,"_end_task",p_task);

}


////////////////////////////////////////////////


ProgressDialog *ProgressDialog::singleton=NULL;

void ProgressDialog::_notification(int p_what) {

	switch(p_what) {

		case NOTIFICATION_DRAW: {

			Ref<StyleBox> style = get_stylebox("panel","PopupMenu");
			draw_style_box(style,Rect2(Point2(),get_size()));

		} break;
	}
}


void ProgressDialog::_popup() {

	Size2 ms = main->get_combined_minimum_size();
	ms.width = MAX(500*EDSCALE,ms.width);


	Ref<StyleBox> style = get_stylebox("panel","PopupMenu");
	ms+=style->get_minimum_size();
	for(int i=0;i<4;i++) {
		main->set_margin(Margin(i),style->get_margin(Margin(i)));
	}

	popup_centered(ms);

}

void ProgressDialog::add_task(const String& p_task,const String& p_label,int p_steps) {

	ERR_FAIL_COND(tasks.has(p_task));
	Task t;
	t.vb = memnew( VBoxContainer );
	VBoxContainer *vb2 = memnew( VBoxContainer );
	t.vb->add_margin_child(p_label,vb2);
	t.progress = memnew( ProgressBar );
	t.progress->set_max(p_steps);
	t.progress->set_value(p_steps);
	vb2->add_child(t.progress);
	t.state=memnew( Label );
	t.state->set_clip_text(true);
	vb2->add_child(t.state);
	main->add_child(t.vb);

	tasks[p_task]=t;
	_popup();

}

void ProgressDialog::task_step(const String& p_task, const String& p_state, int p_step,bool p_force_redraw){

	ERR_FAIL_COND(!tasks.has(p_task));

	if (!p_force_redraw) {
		uint64_t tus = OS::get_singleton()->get_ticks_usec();
		if (tus-last_progress_tick < 50000) //50ms
			return;
	}

	Task &t=tasks[p_task];
	if (p_step<0)
		t.progress->set_value(t.progress->get_value()+1);
	else
		t.progress->set_value(p_step);

	t.state->set_text(p_state);
	last_progress_tick=OS::get_singleton()->get_ticks_usec();
	Main::iteration(); // this will not work on a lot of platforms, so it's only meant for the editor

}


void ProgressDialog::end_task(const String& p_task){

	ERR_FAIL_COND(!tasks.has(p_task));
	Task &t=tasks[p_task];

	memdelete(t.vb);
	tasks.erase(p_task);

	if (tasks.empty())
		hide();
	else
		_popup();
}



ProgressDialog::ProgressDialog() {

	main = memnew( VBoxContainer );
	add_child(main);
	main->set_area_as_parent_rect();
	set_exclusive(true);
	last_progress_tick=0;
	singleton=this;
}
