/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team

  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 3 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, see <http://www.gnu.org/licenses/>.

***/

#include "block.h"

#include <QDebug>

#include "node/inputdragger.h"
#include "node/output/track/track.h"
#include "transition/transition.h"
#include "widget/slider/rationalslider.h"

namespace olive
{

#define super Node

const QString Block::kLengthInput = QStringLiteral("length_in");

Block::Block()
	: previous_(nullptr)
	, next_(nullptr)
	, track_(nullptr)
{
	AddInput(kLengthInput, NodeValue::kRational,
			 InputFlags(kInputFlagNotConnectable | kInputFlagNotKeyframable |
						kInputFlagHidden));
	SetInputProperty(kLengthInput, QStringLiteral("min"),
					 QVariant::fromValue(rational(0, 1)));
	SetInputProperty(kLengthInput, QStringLiteral("view"),
					 RationalSlider::kTime);
	SetInputProperty(kLengthInput, QStringLiteral("viewlock"), true);

	SetInputFlag(kEnabledInput, kInputFlagNotConnectable);
	SetInputFlag(kEnabledInput, kInputFlagNotKeyframable);

	SetFlag(kDontShowInParamView);
}

QVector<Node::CategoryID> Block::Category() const
{
	return { kCategoryTimeline };
}

rational Block::length() const
{
	return GetStandardValue(kLengthInput).value<rational>();
}

void Block::set_length_and_media_out(const rational &length)
{
	if (length == this->length()) {
		return;
	}

	set_length_internal(length);
}

void Block::set_length_and_media_in(const rational &length)
{
	if (length == this->length()) {
		return;
	}

	// Set the length without setting media out
	set_length_internal(length);
}

bool Block::is_enabled() const
{
	return GetStandardValue(kEnabledInput).toBool();
}

void Block::set_enabled(bool e)
{
	SetStandardValue(kEnabledInput, e);

	emit EnabledChanged();
}

void Block::InputValueChangedEvent(const QString &input, int element)
{
	super::InputValueChangedEvent(input, element);

	if (input == kLengthInput) {
		emit LengthChanged();
	} else if (input == kEnabledInput) {
		emit EnabledChanged();
	}
}

void Block::set_length_internal(const rational &length)
{
	SetStandardValue(kLengthInput, QVariant::fromValue(length));
}

void Block::Retranslate()
{
	super::Retranslate();

	SetInputName(kLengthInput, tr("Length"));
	SetInputName(kEnabledInput, tr("Enabled"));
}

void Block::InvalidateCache(const TimeRange &range, const QString &from,
							int element, InvalidateCacheOptions options)
{
	TimeRange r;

	if (from == kLengthInput) {
		// We must intercept the signal here
		r = TimeRange(qMin(length(), last_length_), RATIONAL_MAX);

		if (!NodeInputDragger::IsInputBeingDragged()) {
			last_length_ = length();
		}

		options.insert(QStringLiteral("lengthevent"), true);
	} else {
		r = range;
	}

	super::InvalidateCache(r, from, element, options);
}

void Block::set_previous_next(Block *previous, Block *next)
{
	if (previous) {
		previous->set_next(next);
	}
	if (next) {
		next->set_previous(previous);
	}
}

}