#include "QtProjectWizardContentPathPythonEnvironment.h"

#include "ResourcePaths.h"
#include "SourceGroupSettingsPythonEmpty.h"
#include "utilityApp.h"
#include "utilityFile.h"

QtProjectWizardContentPathPythonEnvironment::QtProjectWizardContentPathPythonEnvironment(
	std::shared_ptr<SourceGroupSettingsPythonEmpty> settings, QtProjectWizardWindow* window
)
	: QtProjectWizardContentPath(window)
	, m_settings(settings)
{
	setTitleString("Python Environment");
	setHelpString(
		"Here you can specify the path to the directory or to the executable of the (virtual) Python environment that should be used to resolve "
		"dependencies within the indexed source code. <br />"
		"<br />"
		"If you would run:<br />"
		"<br />"
		"$ cd C:\\dev\\python\\envs<br />"
		"$ virtualenv py37<br />"
		"<br />"
		"you would set it to \"C:\\dev\\python\\envs\\py37\" or \"C:\\dev\\python\\envs\\py37\\Scripts\\python.exe\". <br />"
		"Leave blank to use the default Python environment. You can make use of environment variables with ${ENV_VAR}."
	);
	setPlaceholderString("Use Default");
	setAllowEmpty(true);
}

void QtProjectWizardContentPathPythonEnvironment::populate(QGridLayout* layout, int& row)
{
	QtProjectWizardContentPath::populate(layout, row);
	connect(
		m_picker, &QtLocationPicker::textChanged,
		this, &QtProjectWizardContentPathPythonEnvironment::onTextChanged
	);

	m_resultLabel = new QLabel();
	m_resultLabel->setWordWrap(true);
	layout->addWidget(m_resultLabel, row, QtProjectWizardWindow::BACK_COL);
	row++;
}

void QtProjectWizardContentPathPythonEnvironment::load()
{
	m_picker->setText(QString::fromStdWString(m_settings->getEnvironmentPath().wstr()));
}

void QtProjectWizardContentPathPythonEnvironment::save()
{
	m_settings->setEnvironmentPath(FilePath(m_picker->getText().toStdWString()));
}

void QtProjectWizardContentPathPythonEnvironment::onTextChanged(const QString& text)
{
	if (text.isEmpty())
	{
		m_resultLabel->clear();
	}
	else
	{
		m_resultLabel->setText("Checking validity of Python environment...");
		std::thread([=]() {
			std::pair<int, std::string> out = utility::executeProcess(
				"\"" + ResourcePaths::getPythonPath().str() + "SourcetrailPythonIndexer\" check-environment " +
				"--environment-path \"" + utility::getExpandedAndAbsolutePath(FilePath(text.toStdWString()), m_settings->getProjectDirectoryPath()).str() + "\"",
				FilePath(),
				5000
			);
			m_onQtThread(
				[=]()
				{
					if (out.first == 0)
					{
						m_resultLabel->setText(QString::fromStdString(out.second));
					}
					else
					{
						m_resultLabel->setText("An error occurred while checking environment path. Unable to check validity.");
					}
				}
			);
		}).detach();
	}
}

std::shared_ptr<SourceGroupSettings> QtProjectWizardContentPathPythonEnvironment::getSourceGroupSettings()
{
	return m_settings;
}