#include "ImportPage.h"
#include "ui_ImportPage.h"

#include "MultiMC.h"
#include "FolderInstanceProvider.h"
#include "dialogs/CustomMessageBox.h"
#include "dialogs/ProgressDialog.h"
#include "dialogs/NewInstanceDialog.h"
#include <QFileDialog>
#include <InstanceImportTask.h>

class UrlValidator : public QValidator
{
public:
	using QValidator::QValidator;

	State validate(QString &in, int &pos) const
	{
		const QUrl url(in);
		if (url.isValid() && !url.isRelative() && !url.isEmpty())
		{
			return Acceptable;
		}
		else if (QFile::exists(in))
		{
			return Acceptable;
		}
		else
		{
			return Intermediate;
		}
	}
};

ImportPage::ImportPage(NewInstanceDialog* dialog, QWidget *parent)
	: QWidget(parent), ui(new Ui::ImportPage), dialog(dialog)
{
	ui->setupUi(this);
	ui->modpackEdit->setValidator(new UrlValidator(ui->modpackEdit));
	connect(ui->modpackEdit, &QLineEdit::textChanged, this, &ImportPage::updateState);
}

ImportPage::~ImportPage()
{
	delete ui;
}

bool ImportPage::shouldDisplay() const
{
	return true;
}

void ImportPage::openedImpl()
{
	updateState();
}

void ImportPage::updateState()
{
	if(!isOpened)
	{
		return;
	}
	if(ui->modpackEdit->hasAcceptableInput())
	{
		QString input = ui->modpackEdit->text();
		auto url = QUrl::fromUserInput(input);
		if(url.isLocalFile())
		{
			// FIXME: actually do some validation of what's inside here... this is fake AF
			QFileInfo fi(input);
			if(fi.exists() && fi.suffix() == "zip")
			{
				QFileInfo fi(url.fileName());
				dialog->setSuggestedPack(fi.completeBaseName(), new InstanceImportTask(url));
			}
		}
		else
		{
			// hook, line and sinker.
			QFileInfo fi(url.fileName());
			dialog->setSuggestedPack(fi.completeBaseName(), new InstanceImportTask(url));
		}
	}
	else
	{
		dialog->setSuggestedPack();
	}
}

void ImportPage::setUrl(const QString& url)
{
	ui->modpackEdit->setText(url);
	updateState();
}

void ImportPage::on_modpackBtn_clicked()
{
	const QUrl url = QFileDialog::getOpenFileUrl(this, tr("Choose modpack"), modpackUrl(), tr("Zip (*.zip)"));
	if (url.isValid())
	{
		if (url.isLocalFile())
		{
			ui->modpackEdit->setText(url.toLocalFile());
		}
		else
		{
			ui->modpackEdit->setText(url.toString());
		}
	}
}


QUrl ImportPage::modpackUrl() const
{
	const QUrl url(ui->modpackEdit->text());
	if (url.isValid() && !url.isRelative() && !url.host().isEmpty())
	{
		return url;
	}
	else
	{
		return QUrl::fromLocalFile(ui->modpackEdit->text());
	}
}