/*
	Copyright 2006-2026 The QElectroTech Team
	This file is part of QElectroTech.
	
	QElectroTech 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.
	
	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "selectautonumw.h"

#include "../assignvariables.h"
#include "formulaautonumberingw.h"
#include "numparteditorw.h"
#include "ui_formulaautonumberingw.h"
#include "ui_selectautonumw.h"

#include "../../qeticons.h"

#include <QHBoxLayout>
#include <QMessageBox>
#include <QPushButton>
#include <QToolButton>

/**
	@brief SelectAutonumW::SelectAutonumW
	Constructor
	@param type : int m_edited_type
	@param parent : QWidget
*/
SelectAutonumW::SelectAutonumW(int type, QWidget *parent) :
	QWidget(parent),
	ui(new Ui::SelectAutonumW),
	m_edited_type(type)
{
	ui->setupUi(this);
	ui->m_comboBox->lineEdit()->setClearButtonEnabled(true);

		//The add button goes under the last part, at the left; each part
		//has its own remove and move buttons at its right. The one remove
		//button above the parts, which could only remove the last one, is
		//not needed any more.
	ui->remove_button->hide();
	ui->horizontalLayout->removeWidget(ui->add_button);
	m_add_row = new QWidget(this);
	auto *add_layout = new QHBoxLayout(m_add_row);
	add_layout->setContentsMargins(0, 0, 0, 0);
	ui->add_button->setParent(m_add_row);
	add_layout->addWidget(ui->add_button);
	add_layout->addStretch();
	ui->editor_layout->addWidget(m_add_row);
	ui->buttonBox->button(QDialogButtonBox::Reset)->setText(tr("Cancel"));
	ui->buttonBox->button(QDialogButtonBox::Reset)->setToolTip(
				tr("Revert to the saved definition"));

	if (m_edited_type == 0)
	{
		m_feaw = new FormulaAutonumberingW();
		m_feaw->ui->label->setHidden(true);
		ui->m_widget->layout()->addWidget(m_feaw);
	}
	else if (m_edited_type == 1)
	{
		m_fcaw = new FormulaAutonumberingW();
		m_fcaw->ui->label->setHidden(true);
		ui->m_widget->layout()->addWidget(m_fcaw);
	}
	setContext(NumerotationContext());
}

/**
	@brief SelectAutonumW::SelectAutonumW
	Constructor
	@param context : NumerotationContext
	@param type : int m_edited_type
	@param parent : QWidget
*/
SelectAutonumW::SelectAutonumW(const NumerotationContext &context,
			       int type,
			       QWidget *parent) :
	QWidget(parent),
	ui(new Ui::SelectAutonumW),
	m_edited_type(type)
{
	if (m_edited_type == 0)
	{
		m_feaw = new FormulaAutonumberingW();
		m_feaw->ui->label->setHidden(true);
		ui->m_widget->layout()->addWidget(m_feaw);
	}
	else if (m_edited_type == 1)
	{
		m_fcaw = new FormulaAutonumberingW();
		m_fcaw->ui->label->setHidden(true);
		ui->m_widget->layout()->addWidget(m_fcaw);
	}
	ui->setupUi(this);
	setContext(context);
}

/**
	@brief SelectAutonumW::~SelectAutonumW
	Destructor
*/
SelectAutonumW::~SelectAutonumW()
{
	delete ui;
}

/**
	@brief SelectAutonumW::setContext
	build the context of current diagram
	selected in the diagram_chooser QcomboBox
	@param context
*/
void SelectAutonumW::setContext(const NumerotationContext &context)
{
	m_context = context;

	clearPartRows();

	if (m_context.size() == 0) { //@context contain nothing, build a default numPartEditor
		insertPartRow(new NumPartEditorW(m_edited_type, this));
	}
	else {
		for (int i=0; i<m_context.size(); ++i) { //build with the content of @context
			insertPartRow(new NumPartEditorW(m_context, i, m_edited_type, this));
		}
	}

	updatePartButtons();
	applyEnable(false);
}

/**
	@brief SelectAutonumW::insertPartRow
	Show @p part as the last part of the definition, with the buttons which
	remove it and move it up or down at its right.
*/
void SelectAutonumW::insertPartRow(NumPartEditorW *part)
{
	connect(part, &NumPartEditorW::changed, this, [this]() { applyEnable(); });

	PartRow r;
	r.part = part;
	r.row = new QWidget(this);
	auto *layout = new QHBoxLayout(r.row);
	layout->setContentsMargins(0, 0, 0, 0);
	layout->setSpacing(2);
	part->setParent(r.row);
	layout->addWidget(part, 1);

	const auto make_button = [&](const QIcon &icon, const QString &tip) {
		auto *button = new QToolButton(r.row);
		button->setIcon(icon);
		button->setToolTip(tip);
		button->setAutoRaise(true);
		layout->addWidget(button);
		return button;
	};
	r.up = make_button(QET::Icons::GoUp, tr("Move this variable up"));
	r.down = make_button(QET::Icons::GoDown, tr("Move this variable down"));
	r.remove = make_button(QET::Icons::EditDelete, tr("Delete this variable"));
	QWidget *row = r.row;
	connect(r.up, &QToolButton::clicked, this, [this, row]() { movePartRow(row, -1); });
	connect(r.down, &QToolButton::clicked, this, [this, row]() { movePartRow(row, +1); });
	connect(r.remove, &QToolButton::clicked, this, [this, row]() { removePartRow(row); });

	m_rows << r;
	num_part_list_ << part;
		//Before the add button, which stays under the last part
	ui->editor_layout->insertWidget(ui->editor_layout->count() - 1, r.row);
	updatePartButtons();
}

/// Take away every part of the definition shown
void SelectAutonumW::clearPartRows()
{
	for (const PartRow &r : std::as_const(m_rows)) {
		delete r.row;   //with the part, which it holds
	}
	m_rows.clear();
	num_part_list_.clear();
}

/**
	@brief SelectAutonumW::updatePartButtons
	The first part cannot move up, the last cannot move down, and the only
	one cannot be removed: those buttons are greyed out.
*/
void SelectAutonumW::updatePartButtons()
{
	for (int i = 0 ; i < m_rows.size() ; ++i) {
		m_rows.at(i).up->setEnabled(i > 0);
		m_rows.at(i).down->setEnabled(i < m_rows.size() - 1);
		m_rows.at(i).remove->setEnabled(m_rows.size() > 1);
	}
}

/// Remove the part shown in @p row; the definition keeps at least one
void SelectAutonumW::removePartRow(QWidget *row)
{
	if (m_rows.size() <= 1) {
		return;
	}
	for (int i = 0 ; i < m_rows.size() ; ++i) {
		if (m_rows.at(i).row == row) {
			const PartRow r = m_rows.takeAt(i);
			num_part_list_.removeAll(r.part);
			delete r.row;   //with the part, which it holds
			break;
		}
	}
	updatePartButtons();
	applyEnable();
}

/// Move the part shown in @p row up (-1) or down (+1)
void SelectAutonumW::movePartRow(QWidget *row, int step)
{
	for (int i = 0 ; i < m_rows.size() ; ++i) {
		if (m_rows.at(i).row != row) {
			continue;
		}
		const int to = i + step;
		if (to < 0 || to >= m_rows.size()) {
			return;
		}
		m_rows.swapItemsAt(i, to);
		num_part_list_.swapItemsAt(i, to);
		ui->editor_layout->removeWidget(row);
		ui->editor_layout->insertWidget(1 + to, row);   //after the header of the columns
		break;
	}
	updatePartButtons();
	applyEnable();
}

/**
	@brief SelectAutonumW::toNumContext
	@return the content to num_part_list to NumerotationContext
*/
NumerotationContext SelectAutonumW::toNumContext() const
{
	NumerotationContext nc;
	foreach (NumPartEditorW *npew, num_part_list_)
		nc << npew -> toNumContext();
	return nc;
}

/**
	@brief SelectAutonumW::on_add_button_clicked
 *	Action on add_button, add a NumPartEditor
*/
void SelectAutonumW::on_add_button_clicked()
{
	insertPartRow(new NumPartEditorW(m_edited_type, this));
	applyEnable();
}

/**
	@brief SelectAutonumW::on_remove_button_clicked
 *	Action on remove button, remove the last NumPartEditor
*/
void SelectAutonumW::on_remove_button_clicked()
{
	if (!m_rows.isEmpty()) {
		removePartRow(m_rows.last().row);
	}
}

/**
	@brief SelectAutonumW::formula
	@return autonumbering widget formula
*/
QString SelectAutonumW::formula()
{
	if (m_edited_type == 0)
		return m_feaw->formula();
	else if (m_edited_type == 1)
		return m_fcaw->formula();
	else
		return "";
}

QComboBox *SelectAutonumW::contextComboBox() const
{
	return ui->m_comboBox;
}

/**
	@brief SelectAutonumW::on_buttonBox_clicked
	Action on button clicked
	@param button
*/
void SelectAutonumW::on_buttonBox_clicked(QAbstractButton *button)
{
	//transform button to int
	int answer = ui -> buttonBox -> buttonRole(button);
	switch (answer) {
			//Reset the current context
		case QDialogButtonBox::ResetRole:
			setContext(m_context);
			break;
			//help dialog
		case QDialogButtonBox::HelpRole:
			if (m_edited_type == 2)
			{
				QMessageBox::information (
							this,
							tr("Sheet Auto Numbering",
							   "title window"),
							tr("This is where you can define how the new sheets will be numbered.\n"
							   "-A numbering is composed of a minimum variable.\n"
							   "-You can add or delete a dialing variable through the - and + buttons.\n"
							   "A numbering variable includes: a type, a value and an increment.\n"
							   "\n"
							   "-the \"Digit 1\", \"Digit 01\" and \"Digit 001\" types represent a numeric type defined in the \"Value\" field, which "
							   "increments each new sheet by the value of the \"Incrementation\" field.\n"
							   "- \"Digit 01\" and \"Digit 001\", are respectively represented on the diagram by two and three digits minimum.\n"
							   "If the digit defined in the Value field has fewer digits than the chosen type, it will be preceded by one or two 0s in "
							   "order to respect its type.\n"
							   "\n"
							   "-Type \"Text\", represents a fixed text.\n"
							   "The \"Incrementation\" field is not used.\n",
							   "help dialog about the folio autonumerotation"
							   ));
				break;
			}
			else if (m_edited_type == 1)
			{
				QMessageBox::information (
							this,
							tr("Numbering conductors",
							   "title window"),
							tr("This is where you can define how new conductors will be numbered.\n"
							   "-A numbering is composed of a minimum variable.\n"
							   "-You can add or delete a dialing variable through the - and + buttons.\n"
							   "A numbering variable includes: a type, a value and an increment.\n"
							   "\n"
							   "the \"Digit 1\", \"Digit 01\" and \"Digit 001\" types represent a numeric type defined in the \"Value\" field, which is "
							   "incremented to each new conductor by the value of the \"Incrementation\" field.\n"
							   "- \"Digit 01\" and \"Digit 001\", are respectively represented on the diagram by two and three digits minimum.\n"
							   "If the digit defined in the Value field has fewer digits than the chosen type, it will be preceded by one or two 0s in "
							   "order to respect its type.\n"
							   "\n"
							   "-Type \"Text\", represents a fixed text.\n"
							   "The \"Incrementation\" field is not used.\n"
							   "\n"
							   "-The \"sheet\" type represents the number of the current sheet.\n"
							   "The other fields are not used.\n"
							   "\n"
							   "-The \"Sheet\" type represents the name of the current sheet.\n"
							   "The other fields are not used.",
							   "help dialog about the conductor autonumerotation"
							   ));
				break;
			}
			else
			{
				QMessageBox::information (
							this,
							tr("Element Auto Numbering",
							   "title window"),
							tr("This is where you can define how new elements will be numbered.\n"
							   "-A numbering is composed of a minimum variable.\n"
							   "-You can add or delete a dialing variable through the - and + buttons.\n"
							   "A numbering variable includes: a type, a value and an increment.\n"
							   "\n"
							   "the \"Digit 1\", \"Digit 01\" and \"Digit 001\" types represent a numeric type defined in the \"Value\" field, which is "
							   "incremented to each new conductor by the value of the \"Incrementation\" field.\n"
							   "- \"Digit 01\" and \"Digit 001\", are respectively represented on the diagram by two and three digits minimum.\n"
							   "If the digit defined in the Value field has fewer digits than the chosen type, it will be preceded by one or two 0s in "
							   "order to respect its type.\n"
							   "\n"
							   "-Type \"Text\", represents a fixed text.\n"
							   "The \"Incrementation\" field is not used.\n"
							   "\n"
							   "-The \"sheet\" type represents the number of the current sheet.\n"
							   "The other fields are not used.\n"
							   "\n"
							   "-The \"Sheet\" type represents the name of the current sheet.\n"
							   "The other fields are not used.",
							   "help dialog about the element autonumerotation"
							   ));
				break;
			}
			//apply the context in the diagram displayed by @diagram_chooser.
		case QDialogButtonBox::ApplyRole:
			applyEnable(false);
			emit applyPressed();
			break;
	};
}

/**
	@brief SelectAutonumW::applyEnable
	enable/disable the apply button
*/
void SelectAutonumW::applyEnable(bool b)
{
		//Apply and Cancel both stand for a change: grey until there is one
	ui->buttonBox->button(QDialogButtonBox::Reset)->setEnabled(b);
	if (b){
		bool valid= true;
		foreach (NumPartEditorW *npe, num_part_list_)
			if (!npe -> isValid())
				valid= false;

		ui->buttonBox->button(QDialogButtonBox::Apply)
				->setEnabled(valid);
	}
	else {
		ui->buttonBox->button(QDialogButtonBox::Apply)
				->setEnabled(b);
	}
	if (m_edited_type == 0)
		contextToFormula();
	if (m_edited_type == 1)
		contextToFormula();
}

/**
	@brief SelectAutonumW::contextToFormula
	Apply formula to ElementAutonumbering Widget
*/
void SelectAutonumW::contextToFormula()
{
	FormulaAutonumberingW* m_faw = nullptr;
	if (m_edited_type == 0)
		m_faw = m_feaw;
	else if (m_edited_type == 1)
		m_faw = m_fcaw;

	if (m_faw)
	{
		m_faw->clearContext();
		m_faw->setContext(autonum::numerotationContextToFormula(
					  toNumContext()));
	}
}

void SelectAutonumW::on_m_comboBox_currentTextChanged(const QString &arg1)
{
	Q_UNUSED(arg1);
	applyEnable(true);
}

void SelectAutonumW::on_m_remove_pb_clicked()
{
	emit removeClicked();
}

/**
	@brief SelectAutonumW::setExplicitNaming
	Make the list of numberings a plain choice: no typing a name into it
	(an easy way to create a numbering by accident, or one with an empty
	name), but a button to create a numbering and one to rename the shown
	one, which emit newClicked() and renameClicked() for the owner to ask
	for the name.
*/
void SelectAutonumW::setExplicitNaming()
{
	ui->m_comboBox->setEditable(false);
	auto *row = ui->horizontalLayout_2;
	const int index = row->indexOf(ui->m_remove_pb);

	auto *new_pb = new QPushButton(QET::Icons::Add, QString(), this);
	new_pb->setToolTip(tr("New numbering…"));
	connect(new_pb, &QPushButton::clicked, this, &SelectAutonumW::newClicked);

	auto *rename_pb = new QPushButton(QET::Icons::EditRename, QString(), this);
	rename_pb->setToolTip(tr("Rename numbering…"));
	connect(rename_pb, &QPushButton::clicked, this, &SelectAutonumW::renameClicked);

	row->insertWidget(index, rename_pb);
	row->insertWidget(index, new_pb);
}