#include "qt/element/QtCodeSnippet.h"

#include <QBoxLayout>
#include <qmenu.h>
#include <QPushButton>

#include "utility/messaging/type/MessageShowScope.h"

#include "data/location/SourceLocationFile.h"
#include "qt/element/QtCodeNavigator.h"
#include "qt/element/QtCodeFile.h"

std::shared_ptr<QtCodeSnippet> QtCodeSnippet::merged(
	QtCodeSnippet* a, QtCodeSnippet* b, QtCodeNavigator* navigator, QtCodeFile* file)
{
	QtCodeSnippet* first = a->getStartLineNumber() < b->getStartLineNumber() ? a : b;
	QtCodeSnippet* second = a->getStartLineNumber() > b->getStartLineNumber() ? a : b;

	SourceLocationFile* aFile = a->m_codeArea->getSourceLocationFile().get();
	SourceLocationFile* bFile = b->m_codeArea->getSourceLocationFile().get();

	std::shared_ptr<SourceLocationFile> locationFile =
		std::make_shared<SourceLocationFile>(aFile->getFilePath(), aFile->isWhole(), aFile->isWhole());

	aFile->forEachSourceLocation(
		[&locationFile](SourceLocation* loc)
		{
			locationFile->addSourceLocationCopy(loc);
		}
	);

	bFile->forEachSourceLocation(
		[&locationFile](SourceLocation* loc)
		{
			locationFile->addSourceLocationCopy(loc);
		}
	);

	std::string code = first->getCode();

	std::string secondCode = second->getCode();
	int secondCodeStartIndex = 0;
	for (uint i = second->getStartLineNumber(); i <= first->getEndLineNumber(); i++)
	{
		secondCodeStartIndex = secondCode.find("\n", secondCodeStartIndex) + 1;
	}
	code += secondCode.substr(secondCodeStartIndex, secondCode.npos);

	CodeSnippetParams params;
	params.startLineNumber = first->getStartLineNumber();
	params.title = first->m_titleString;
	params.titleId = first->m_titleId;
	params.footer = second->m_footerString;
	params.footerId = second->m_footerId;
	params.code = code;
	params.locationFile = locationFile;

	return std::shared_ptr<QtCodeSnippet>(new QtCodeSnippet(params, navigator, file));
}

QtCodeSnippet::QtCodeSnippet(const CodeSnippetParams& params, QtCodeNavigator* navigator, QtCodeFile* file)
	: QFrame(file)
	, m_navigator(navigator)
	, m_file(file)
	, m_titleId(params.titleId)
	, m_titleString(params.title)
	, m_footerId(params.footerId)
	, m_footerString(params.footer)
	, m_title(nullptr)
	, m_footer(nullptr)
	, m_codeArea(nullptr)
{
	setObjectName("code_snippet");

	QVBoxLayout* layout = new QVBoxLayout(this);
	layout->setMargin(0);
	layout->setSpacing(0);
	layout->setAlignment(Qt::AlignTop);
	setLayout(layout);

	if (m_titleString.size() && !params.reduced)
	{
		m_title = createScopeLine(layout);
		if (m_titleId == 0) // title is a file path
		{
			m_title->setText(FilePath(m_titleString).fileName().c_str());
		}
		else
		{
			m_title->setText(m_titleString.c_str());
		}
		connect(m_title, &QPushButton::clicked, this, &QtCodeSnippet::clickedTitle);
	}

	m_codeArea = new QtCodeArea(params.startLineNumber, params.code, params.locationFile, navigator, !params.reduced, this);
	layout->addWidget(m_codeArea);

	if (m_footerString.size())
	{
		m_footer = createScopeLine(layout);
		if (m_footerId == 0) // footer is a file path
		{
			m_footer->setText(FilePath(m_footerString).fileName().c_str());
		}
		else
		{
			m_footer->setText(m_footerString.c_str());
		}
		connect(m_footer, &QPushButton::clicked, this, &QtCodeSnippet::clickedFooter);
	}
}

QtCodeSnippet::~QtCodeSnippet()
{
}

QtCodeFile* QtCodeSnippet::getFile() const
{
	return m_file;
}

QtCodeArea* QtCodeSnippet::getArea() const
{
	return m_codeArea;
}

uint QtCodeSnippet::getStartLineNumber() const
{
	return m_codeArea->getStartLineNumber();
}

uint QtCodeSnippet::getEndLineNumber() const
{
	return m_codeArea->getEndLineNumber();
}

int QtCodeSnippet::lineNumberDigits() const
{
	return m_codeArea->lineNumberDigits();
}

void QtCodeSnippet::updateLineNumberAreaWidthForDigits(int digits)
{
	m_codeArea->updateLineNumberAreaWidthForDigits(digits);
	updateDots();
}

void QtCodeSnippet::updateContent()
{
	m_codeArea->updateContent();
	updateDots();
}

void QtCodeSnippet::setIsActiveFile(bool isActiveFile)
{
	m_codeArea->setIsActiveFile(isActiveFile);
}

uint QtCodeSnippet::getLineNumberForLocationId(Id locationId) const
{
	return m_codeArea->getLineNumberForLocationId(locationId);
}

std::pair<uint, uint> QtCodeSnippet::getLineNumbersForLocationId(Id locationId) const
{
	return m_codeArea->getLineNumbersForLocationId(locationId);
}

Id QtCodeSnippet::getFirstActiveLocationId(Id tokenId) const
{
	Id scopeId = m_codeArea->getLocationIdOfFirstActiveScopeLocation(tokenId);
	if (scopeId)
	{
		return scopeId;
	}

	return m_codeArea->getLocationIdOfFirstActiveLocation(tokenId);
}

QRectF QtCodeSnippet::getLineRectForLineNumber(uint lineNumber) const
{
	return m_codeArea->getLineRectForLineNumber(lineNumber);
}

std::string QtCodeSnippet::getCode() const
{
	return m_codeArea->getCode();
}

void QtCodeSnippet::findScreenMatches(const std::string& query, std::vector<std::pair<QtCodeArea*, Id>>* screenMatches)
{
	m_codeArea->findScreenMatches(query, screenMatches);
}

void QtCodeSnippet::clickedTitle()
{
	if (m_titleId > 0)
	{
		MessageShowScope(m_titleId, m_navigator->hasErrors()).dispatch();
	}
	else
	{
		getFile()->clickedMaximizeButton();
	}

	m_navigator->requestScroll(getFile()->getFilePath(), getStartLineNumber(), 0, true, false);
}

void QtCodeSnippet::clickedFooter()
{
	if (m_footerId > 0)
	{
		MessageShowScope(m_footerId, m_navigator->hasErrors()).dispatch();

		m_navigator->requestScroll(getFile()->getFilePath(), getEndLineNumber(), 0, true, false);
	}
}

QPushButton* QtCodeSnippet::createScopeLine(QBoxLayout* layout)
{
	QHBoxLayout* lineLayout = new QHBoxLayout();
	lineLayout->setMargin(0);
	lineLayout->setSpacing(0);
	lineLayout->setAlignment(Qt::AlignLeft);
	layout->addLayout(lineLayout);

	QPushButton* dots = new QPushButton(this);
	dots->setObjectName("dots");
	dots->setAttribute(Qt::WA_LayoutUsesWidgetRect); // fixes layouting on Mac
	lineLayout->addWidget(dots);
	m_dots.push_back(dots);

	QPushButton* line = new QPushButton(this);
	line->setObjectName("scope_name");
	line->minimumSizeHint(); // force font loading
	line->setAttribute(Qt::WA_LayoutUsesWidgetRect); // fixes layouting on Mac
	line->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
	lineLayout->addWidget(line);

	return line;
}

void QtCodeSnippet::updateDots()
{
	for (QPushButton* dots : m_dots)
	{
		dots->setText(QString::fromStdString(std::string(lineNumberDigits(), '.')));
		dots->setMinimumWidth(m_codeArea->lineNumberAreaWidth());
	}
}