#include "runepagelist.h"
#include "ui_runepagelist.h"

#include <QDebug>
#include <QDropEvent>
#include <QMenu>
#include <QMimeData>
#include <QTextStream>

#include "clipboardpopup.h"
#include "runeeditor.h"

RunePageList::RunePageList(QWidget* parent) : QListWidget(parent), ui(new Ui::RunePageList) {
	ui->setupUi(this);

	QObject::connect(this, &QListWidget::itemChanged, this, &RunePageList::itemChangedCallback);
	QObject::connect(this, &QListWidget::customContextMenuRequested, this, &RunePageList::openContextMenu);
}

RunePageList::~RunePageList() {
	delete this->ui;
}

void RunePageList::loadRunePages(const std::vector<ClientAPI::RunePage>& pages) {
	clearItems();
	for(const ClientAPI::RunePage& rp : pages) {
		addRunepageItem(rp.name, rp.id, rp.runepage, rp.isCurrent);
	}
}

void RunePageList::loadRunePages(const std::vector<std::shared_ptr<Config::RunePageConfig>>& pages) {
	clearItems();
	for(size_t i = 0; i < pages.size(); ++i) {
		std::shared_ptr<Config::RunePageConfig> rp = pages.at(i);
		addRunepageItem(rp->name, i, rp->runepage);
	}
}

void RunePageList::setRuneInfos(const std::vector<RuneAspekt>& runeInfo, const std::vector<RuneStyle>& runeStyles) {
	this->runeInfo = &runeInfo;
	this->runeStyles = &runeStyles;
}

void RunePageList::dropEvent(QDropEvent* event) {
	if(event->source() == nullptr || event->source() != other) {
		event->ignore();
		return;
	}

	auto selected = other->selectedItems();
	if(selected.size() != 1) {
		event->ignore();
		return;
	}
	QListWidgetItem* item = selected.at(0);

	// compare rune pages for duplicates?

	// QListWidget::dropEvent(event);

	// save change
	QString name = item->text();
	const RunePage* oldPage = (RunePage*) item->data(RolePointer).toULongLong();

	emit runepageChanged(-1, name, *oldPage);
}

void RunePageList::itemChangedCallback(QListWidgetItem* item) {
	int pageId = item->data(RunePageList::RoleId).toUInt();
	QString newName = item->text();
	const ::RunePage* page = (::RunePage*) item->data(RunePageList::RolePointer).toULongLong();
	emit runepageChanged(pageId, newName, *page);
}

void RunePageList::openContextMenu(const QPoint& pos) {
	QPoint globalPos = mapToGlobal(pos);

	QMenu menu;
	menu.addAction(QIcon(":/icons/edit.svg"), RunePageList::tr("Edit (Beta)"), this, &RunePageList::editCurrentItem);
	menu.addAction(QIcon(":/icons/duplicate.svg"), RunePageList::tr("Duplicate"), this, &RunePageList::duplicateCurrentItem);
	menu.addAction(QIcon(":/icons/export.svg"), RunePageList::tr("Export"), this, &RunePageList::exportCurrentItem);
	menu.addAction(QIcon(":/icons/import.svg"), RunePageList::tr("Import"), this, &RunePageList::importItem);
	menu.addAction(QIcon(":/icons/delete.svg"), RunePageList::tr("Delete"), this, &RunePageList::deleteCurrentItem);

	menu.exec(globalPos);
}

void RunePageList::deleteCurrentItem() {
	QListWidgetItem* item = currentItem();
	if (item) {
		uint32_t id = item->data(RoleId).toUInt();
		RunePage* page = (RunePage*) item->data(RolePointer).toULongLong();
		removeItemWidget(item);

		delete item;
		delete page;

		emit runepageDeleted(id);
	}
}

void RunePageList::editCurrentItem() {
	QListWidgetItem* item = currentItem();
	if(!item) return;

	RunePage* rp = (RunePage*) item->data(RolePointer).toULongLong();
	const uint32_t id = item->data(RoleId).toUInt();

	RuneEditor re;

	re.setName(item->text());
	re.setClient(*client);
	re.setRunepage(*rp);

	int result = re.exec();

	// check result - save
	if(result == QDialog::Accepted) {

		// update config
		emit runepageChanged(id, re.getName(), re.getRunepage());
	}
}

void RunePageList::duplicateCurrentItem() {
	QListWidgetItem* item = currentItem();
	if(!item) return;

	const RunePage* rp = (RunePage*) item->data(RolePointer).toULongLong();

	QString name = item->text();

	static const QRegularExpression regex(".*(\\d)+$");
	QRegularExpressionMatchIterator regexIt = regex.globalMatch(name);
	int num = 0;
	if(regexIt.hasNext()) {
		QRegularExpressionMatch match = regexIt.next();
		QStringRef ref = match.capturedRef(1);
		name.chop(ref.size());
		num = ref.toInt();
	}
	name += QString::number(num+1);

	emit runepageChanged(-1, name, *rp);
}

void RunePageList::exportCurrentItem() {
	QListWidgetItem* item = currentItem();
	if(!item) return;

	const RunePage* rp = (RunePage*) item->data(RolePointer).toULongLong();

	Config::RunePageConfig rpc;
	rpc.name = item->text();
	rpc.runepage = *rp;

	QJsonDocument rpcDoc(rpc); // cast to QJsonObject
	QByteArray jsonBytes = rpcDoc.toJson(QJsonDocument::Compact).toBase64();
	QString runePageString = QString::fromLocal8Bit(jsonBytes);

	ClipboardPopup popup(ClipboardPopup::Direction::Copy);
	popup.setText(runePageString);
	popup.exec();
}

void RunePageList::importItem() {
	ClipboardPopup popup(ClipboardPopup::Direction::Paste);
	if(popup.exec() != QDialog::Accepted) {
		return;
	}

	QString text = popup.getText();
	QByteArray jsonBytes = QByteArray::fromBase64(text.toLocal8Bit());
	QJsonDocument rpcDoc = QJsonDocument::fromJson(jsonBytes);
	if(rpcDoc.isObject()) {
		QJsonObject rpcJson = rpcDoc.object();
		Config::RunePageConfig rpc = rpcJson; // implicit cast

		if(rpc.name.isEmpty() || !rpc.runepage) {
			// invalid
			return;
		}

		emit runepageChanged(-1, rpc.name, rpc.runepage);
	}
}

void RunePageList::clearItems() {
	while(count()) {
		QListWidgetItem* item = takeItem(0);
		delete (RunePage*) item->data(RolePointer).toULongLong();
		delete item;
	}

	clear();
}

void RunePageList::addRunepageItem(QString name, int id, const ::RunePage& rp, bool isCurrent) {
	QListWidgetItem* item = new QListWidgetItem(name);
	item->setData(RoleId, (uint) id);
	item->setData(RolePointer, (qulonglong) new ::RunePage(rp));

	const DataDragon::ChampData& champData = findChamp(name);
	if(champData.key != -1) {
		QPixmap iamge = dd->getImage(champData.id);
		item->setIcon(iamge);
	}

	QString tooltipStr;
	if(id != -1) {
		tooltipStr = QString("id: %0\n").arg(id);
	}
	tooltipStr += getRuneDescription(rp);
	item->setToolTip(tooltipStr);

	item->setFlags(item->flags() | Qt::ItemIsEditable);
	if(isCurrent) {
		item->setSelected(true);
	}
	addItem(item);
}

const DataDragon::ChampData& RunePageList::findChamp(const QString& name) {
	if(!dd) {
		return DataDragon::EMPTYCHAMP;
	}

	// try direct
	int count = 0;
	const DataDragon::ChampData& directChampData = dd->getBestMatchingChamp(name, &count);
	if(directChampData.key != -1) {
		return directChampData;
	}

	// not specific
	if(count > 1) {
		return DataDragon::EMPTYCHAMP;
	}

	// try for substrings
	static const QRegularExpression splittingRegex("\\W+");
	QStringList list = name.split(splittingRegex, QString::SplitBehavior::SkipEmptyParts);
	QSet<int> matchedIds;
	const DataDragon::ChampData* lastMatched = nullptr;
	for(const QString& entry : list) {
		count = 0;
		const DataDragon::ChampData& splitChampData = dd->getBestMatchingChamp(entry, &count);
		if(count == 1) {
			matchedIds.insert(splitChampData.key);
			lastMatched = &splitChampData;
		} else if(count > 1) {
			// not specific
			return DataDragon::EMPTYCHAMP;
		}
	}

	if(lastMatched && matchedIds.size() == 1) {
		return *lastMatched;
	}

	// not specific or not found
	return DataDragon::EMPTYCHAMP;
}

QString RunePageList::getRuneDescription(const ::RunePage& runepage) {
	QString outStr;
	outStr.reserve(100);
	QTextStream out(&outStr);

	if(! (bool) runepage) {
		return {};
	}

	out << getRuneStyleByID(runepage.primaryStyle) << ' ' << RunePageList::tr("with") << ' ' << getRuneStyleByID(runepage.secondaryStyle);

	for(uint32_t rune : runepage.selectedAspects) {
		out << '\n' << getRuneText(rune);
	}
	return outStr;
}

QString RunePageList::getRuneText(uint32_t id) {
	if(runeInfo != nullptr) {
		for(const RuneAspekt& ra : *runeInfo) {
			if(ra.id == id) {
				return ra.name;
			}
		}
	}

	return QString("(%0)").arg(id);
}

QString RunePageList::getRuneStyleByID(uint32_t id) {
	if(runeStyles != nullptr) {
		auto it = std::find_if(runeStyles->begin(), runeStyles->end(), [id](const RuneStyle& rs) { return rs.id == id; });

		if(it != runeStyles->end()) {
			return it->name;
		}
	}

	return QString("(%0)").arg(id);
}