/*
 * Oak Video Editor - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE 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 "nodeundo.h"

namespace olive
{

void NodeSetPositionCommand::redo()
{
	added_ = !context_->ContextContainsNode(node_);

	if (!added_) {
		old_pos_ = context_->GetNodePositionDataInContext(node_);
	}

	context_->SetNodePositionInContext(node_, pos_);
}

void NodeSetPositionCommand::undo()
{
	if (added_) {
		context_->RemoveNodeFromContext(node_);
	} else {
		context_->SetNodePositionInContext(node_, old_pos_);
	}
}

void NodeRemovePositionFromContextCommand::redo()
{
	contained_ = context_->ContextContainsNode(node_);

	if (contained_) {
		old_pos_ = context_->GetNodePositionDataInContext(node_);
		context_->RemoveNodeFromContext(node_);
	}
}

void NodeRemovePositionFromContextCommand::undo()
{
	if (contained_) {
		context_->SetNodePositionInContext(node_, old_pos_);
	}
}

void NodeRemovePositionFromAllContextsCommand::redo()
{
	Project *graph = node_->parent();

	foreach (Node *context, graph->nodes()) {
		if (context->ContextContainsNode(node_)) {
			contexts_.insert(
				{ context, context->GetNodePositionInContext(node_) });
			context->RemoveNodeFromContext(node_);
		}
	}
}

void NodeRemovePositionFromAllContextsCommand::undo()
{
	for (auto it = contexts_.crbegin(); it != contexts_.crend(); it++) {
		it->first->SetNodePositionInContext(node_, it->second);
	}

	contexts_.clear();
}

void NodeSetPositionAndDependenciesRecursivelyCommand::prepare()
{
	move_recursively(
		node_,
		pos_.position - context_->GetNodePositionDataInContext(node_).position);
}

void NodeSetPositionAndDependenciesRecursivelyCommand::redo()
{
	for (auto it = commands_.cbegin(); it != commands_.cend(); it++) {
		(*it)->redo_now();
	}
}

void NodeSetPositionAndDependenciesRecursivelyCommand::undo()
{
	for (auto it = commands_.crbegin(); it != commands_.crend(); it++) {
		(*it)->undo_now();
	}
}

void NodeSetPositionAndDependenciesRecursivelyCommand::move_recursively(
	Node *node, const QPointF &diff)
{
	Node::Position pos = context_->GetNodePositionDataInContext(node);
	pos += diff;
	commands_.append(new NodeSetPositionCommand(node_, context_, pos));

	for (auto it = node->input_connections().cbegin();
		 it != node->input_connections().cend(); it++) {
		Node *output = it->second;
		if (context_->ContextContainsNode(output)) {
			move_recursively(output, diff);
		}
	}
}

NodeEdgeAddCommand::NodeEdgeAddCommand(Node *output, const NodeInput &input)
	: output_(output)
	, input_(input)
	, remove_command_(nullptr)
{
}

NodeEdgeAddCommand::~NodeEdgeAddCommand()
{
	delete remove_command_;
}

void NodeEdgeAddCommand::redo()
{
	if (input_.IsConnected()) {
		if (!remove_command_) {
			remove_command_ =
				new NodeEdgeRemoveCommand(input_.GetConnectedOutput(), input_);
		}

		remove_command_->redo_now();
	}

	Node::ConnectEdge(output_, input_);
}

void NodeEdgeAddCommand::undo()
{
	Node::DisconnectEdge(output_, input_);

	if (remove_command_) {
		remove_command_->undo_now();
	}
}

Project *NodeEdgeAddCommand::GetRelevantProject() const
{
	return output_->project();
}

NodeEdgeRemoveCommand::NodeEdgeRemoveCommand(Node *output,
											 const NodeInput &input)
	: output_(output)
	, input_(input)
{
}

void NodeEdgeRemoveCommand::redo()
{
	Node::DisconnectEdge(output_, input_);
}

void NodeEdgeRemoveCommand::undo()
{
	Node::ConnectEdge(output_, input_);
}

Project *NodeEdgeRemoveCommand::GetRelevantProject() const
{
	return output_->project();
}

NodeAddCommand::NodeAddCommand(Project *graph, Node *node)
	: graph_(graph)
	, node_(node)
{
	// Ensures that when this command is destroyed, if redo() is never called again, the node will be destroyed too
	node_->setParent(&memory_manager_);
}

void NodeAddCommand::PushToThread(QThread *thread)
{
	memory_manager_.moveToThread(thread);
}

void NodeAddCommand::redo()
{
	node_->setParent(graph_);
}

void NodeAddCommand::undo()
{
	node_->setParent(&memory_manager_);
}

Project *NodeAddCommand::GetRelevantProject() const
{
	return graph_;
}

void NodeRemoveAndDisconnectCommand::prepare()
{
	command_ = new MultiUndoCommand();

	// If this is a block, remove all links
	if (node_->HasLinks()) {
		command_->add_child(new NodeUnlinkAllCommand(node_));
	}

	// Disconnect everything
	for (auto it = node_->input_connections().cbegin();
		 it != node_->input_connections().cend(); it++) {
		command_->add_child(new NodeEdgeRemoveCommand(it->second, it->first));
	}

	for (const Node::OutputConnection &conn : node_->output_connections()) {
		command_->add_child(new NodeEdgeRemoveCommand(conn.first, conn.second));
	}

	command_->add_child(new NodeRemovePositionFromAllContextsCommand(node_));
}

void NodeRenameCommand::AddNode(Node *node, const QString &new_name)
{
	nodes_.append(node);
	new_labels_.append(new_name);
	old_labels_.append(node->GetLabel());
}

void NodeRenameCommand::redo()
{
	for (int i = 0; i < nodes_.size(); i++) {
		nodes_.at(i)->SetLabel(new_labels_.at(i));
	}
}

void NodeRenameCommand::undo()
{
	for (int i = 0; i < nodes_.size(); i++) {
		nodes_.at(i)->SetLabel(old_labels_.at(i));
	}
}

Project *NodeRenameCommand::GetRelevantProject() const
{
	return nodes_.isEmpty() ? nullptr : nodes_.first()->project();
}

NodeOverrideColorCommand::NodeOverrideColorCommand(Node *node, int index)
	: node_(node)
	, new_index_(index)
{
}

Project *NodeOverrideColorCommand::GetRelevantProject() const
{
	return node_->project();
}

void NodeOverrideColorCommand::redo()
{
	old_index_ = node_->GetOverrideColor();
	node_->SetOverrideColor(new_index_);
}

void NodeOverrideColorCommand::undo()
{
	node_->SetOverrideColor(old_index_);
}

NodeViewDeleteCommand::NodeViewDeleteCommand()
{
}

void NodeViewDeleteCommand::AddNode(Node *node, Node *context)
{
	if (ContainsNode(node, context)) {
		return;
	}

	Node::ContextPair p = { node, context };
	nodes_.append(p);

	for (auto it = node->input_connections().cbegin();
		 it != node->input_connections().cend(); it++) {
		if (context->ContextContainsNode(it->second)) {
			AddEdge(it->second, it->first);
		}
	}

	for (auto it = node->output_connections().cbegin();
		 it != node->output_connections().cend(); it++) {
		if (context->ContextContainsNode(it->second.node())) {
			AddEdge(it->first, it->second);
		}
	}
}

void NodeViewDeleteCommand::AddEdge(Node *output, const NodeInput &input)
{
	foreach (const Node::OutputConnection &edge, edges_) {
		if (edge.first == output && edge.second == input) {
			return;
		}
	}

	edges_.append({ output, input });
}

bool NodeViewDeleteCommand::ContainsNode(Node *node, Node *context)
{
	foreach (const Node::ContextPair &pair, nodes_) {
		if (pair.node == node && pair.context == context) {
			return true;
		}
	}

	return false;
}

Project *NodeViewDeleteCommand::GetRelevantProject() const
{
	if (!nodes_.isEmpty()) {
		return nodes_.first().node->project();
	}

	if (!edges_.isEmpty()) {
		return edges_.first().first->project();
	}

	return nullptr;
}

void NodeViewDeleteCommand::redo()
{
	foreach (const Node::OutputConnection &edge, edges_) {
		Node::DisconnectEdge(edge.first, edge.second);
	}

	foreach (const Node::ContextPair &pair, nodes_) {
		RemovedNode rn;

		rn.node = pair.node;
		rn.context = pair.context;
		rn.pos = rn.context->GetNodePositionInContext(rn.node);

		rn.context->RemoveNodeFromContext(rn.node);

		// If node is no longer in any contexts and is not connected to anything, remove it
		if (rn.node->parent()->GetNumberOfContextsNodeIsIn(rn.node, true) ==
				0 &&
			rn.node->input_connections().empty() &&
			rn.node->output_connections().empty()) {
			rn.removed_from_graph = rn.node->parent();
			rn.node->setParent(&memory_manager_);
		} else {
			rn.removed_from_graph = nullptr;
		}

		removed_nodes_.append(rn);
	}
}

void NodeViewDeleteCommand::undo()
{
	for (auto rn = removed_nodes_.crbegin(); rn != removed_nodes_.crend();
		 rn++) {
		if (rn->removed_from_graph) {
			rn->node->setParent(rn->removed_from_graph);
		}

		rn->context->SetNodePositionInContext(rn->node, rn->pos);
	}
	removed_nodes_.clear();

	for (auto edge = edges_.crbegin(); edge != edges_.crend(); edge++) {
		Node::ConnectEdge(edge->first, edge->second);
	}
}

NodeParamSetKeyframingCommand::NodeParamSetKeyframingCommand(
	const NodeInput &input, bool setting)
	: input_(input)
	, new_setting_(setting)
{
}

Project *NodeParamSetKeyframingCommand::GetRelevantProject() const
{
	return input_.node()->project();
}

void NodeParamSetKeyframingCommand::redo()
{
	old_setting_ = input_.IsKeyframing();
	input_.node()->SetInputIsKeyframing(input_, new_setting_);
}

void NodeParamSetKeyframingCommand::undo()
{
	input_.node()->SetInputIsKeyframing(input_, old_setting_);
}

NodeParamSetKeyframeValueCommand::NodeParamSetKeyframeValueCommand(
	NodeKeyframe *key, const QVariant &value)
	: key_(key)
	, old_value_(key_->value())
	, new_value_(value)
{
}

NodeParamSetKeyframeValueCommand::NodeParamSetKeyframeValueCommand(
	NodeKeyframe *key, const QVariant &new_value, const QVariant &old_value)
	: key_(key)
	, old_value_(old_value)
	, new_value_(new_value)
{
}

Project *NodeParamSetKeyframeValueCommand::GetRelevantProject() const
{
	return key_->parent()->project();
}

void NodeParamSetKeyframeValueCommand::redo()
{
	key_->set_value(new_value_);
}

void NodeParamSetKeyframeValueCommand::undo()
{
	key_->set_value(old_value_);
}

NodeParamInsertKeyframeCommand::NodeParamInsertKeyframeCommand(
	Node *node, NodeKeyframe *keyframe)
	: input_(node)
	, keyframe_(keyframe)
{
	// Take ownership of the keyframe
	undo();
}

Project *NodeParamInsertKeyframeCommand::GetRelevantProject() const
{
	return input_->project();
}

void NodeParamInsertKeyframeCommand::redo()
{
	keyframe_->setParent(input_);
}

void NodeParamInsertKeyframeCommand::undo()
{
	keyframe_->setParent(&memory_manager_);
}

NodeParamRemoveKeyframeCommand::NodeParamRemoveKeyframeCommand(
	NodeKeyframe *keyframe)
	: input_(keyframe->parent())
	, keyframe_(keyframe)
{
}

Project *NodeParamRemoveKeyframeCommand::GetRelevantProject() const
{
	return input_->project();
}

void NodeParamRemoveKeyframeCommand::redo()
{
	// Removes from input
	keyframe_->setParent(&memory_manager_);
}

void NodeParamRemoveKeyframeCommand::undo()
{
	keyframe_->setParent(input_);
}

NodeParamSetKeyframeTimeCommand::NodeParamSetKeyframeTimeCommand(
	NodeKeyframe *key, const rational &time)
	: key_(key)
	, old_time_(key->time())
	, new_time_(time)
{
}

NodeParamSetKeyframeTimeCommand::NodeParamSetKeyframeTimeCommand(
	NodeKeyframe *key, const rational &new_time, const rational &old_time)
	: key_(key)
	, old_time_(old_time)
	, new_time_(new_time)
{
}

Project *NodeParamSetKeyframeTimeCommand::GetRelevantProject() const
{
	return key_->parent()->project();
}

void NodeParamSetKeyframeTimeCommand::redo()
{
	key_->set_time(new_time_);
}

void NodeParamSetKeyframeTimeCommand::undo()
{
	key_->set_time(old_time_);
}

NodeParamSetStandardValueCommand::NodeParamSetStandardValueCommand(
	const NodeKeyframeTrackReference &input, const QVariant &value)
	: ref_(input)
	, old_value_(ref_.input().node()->GetStandardValue(ref_.input()))
	, new_value_(value)
{
}

NodeParamSetStandardValueCommand::NodeParamSetStandardValueCommand(
	const NodeKeyframeTrackReference &input, const QVariant &new_value,
	const QVariant &old_value)
	: ref_(input)
	, old_value_(old_value)
	, new_value_(new_value)
{
}

Project *NodeParamSetStandardValueCommand::GetRelevantProject() const
{
	return ref_.input().node()->project();
}

void NodeParamSetStandardValueCommand::redo()
{
	ref_.input().node()->SetSplitStandardValueOnTrack(ref_, new_value_);
}

void NodeParamSetStandardValueCommand::undo()
{
	ref_.input().node()->SetSplitStandardValueOnTrack(ref_, old_value_);
}

NodeParamArrayAppendCommand::NodeParamArrayAppendCommand(Node *node,
														 const QString &input)
	: node_(node)
	, input_(input)
{
}

Project *NodeParamArrayAppendCommand::GetRelevantProject() const
{
	return node_->project();
}

void NodeParamArrayAppendCommand::redo()
{
	node_->InputArrayAppend(input_);
}

void NodeParamArrayAppendCommand::undo()
{
	node_->InputArrayRemoveLast(input_);
}

void NodeSetValueHintCommand::redo()
{
	old_hint_ =
		input_.node()->GetValueHintForInput(input_.input(), input_.element());
	input_.node()->SetValueHintForInput(input_.input(), new_hint_,
										input_.element());
}

void NodeSetValueHintCommand::undo()
{
	input_.node()->SetValueHintForInput(input_.input(), old_hint_,
										input_.element());
}

Project *NodeArrayInsertCommand::GetRelevantProject() const
{
	return node_->project();
}

Project *NodeArrayRemoveCommand::GetRelevantProject() const
{
	return node_->project();
}

Project *NodeArrayResizeCommand::GetRelevantProject() const
{
	return node_->project();
}

void NodeImmediateRemoveAllKeyframesCommand::prepare()
{
	for (const NodeKeyframeTrack &track : immediate_->keyframe_tracks()) {
		keys_.append(track);
	}
}

void NodeImmediateRemoveAllKeyframesCommand::redo()
{
	for (auto it = keys_.cbegin(); it != keys_.cend(); it++) {
		(*it)->setParent(&memory_manager_);
	}
}

void NodeImmediateRemoveAllKeyframesCommand::undo()
{
	for (auto it = keys_.crbegin(); it != keys_.crend(); it++) {
		(*it)->setParent(&memory_manager_);
	}
}

}
