#include "SequenceView.h"
#include <QSpinBox>
#include <QJsonDocument>
#include <QJsonObject>
#include "TranslateBasic.h"

using namespace extract;

IntDelegate::IntDelegate(int min, int max)
	: _min_value(min), _max_value(max) {
}

QWidget* IntDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	return new QSpinBox(parent);
}

void IntDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
	auto spin = dynamic_cast<QSpinBox*>(editor);
	spin->setRange(_min_value, _max_value);
	spin->setValue(index.data(Qt::DisplayRole).toInt());
}

void IntDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
{
	auto value = dynamic_cast<QSpinBox*>(editor);
	model->setData(index, value->value(), Qt::EditRole);

	emit this->valueChanged(index);
}

void IntDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	editor->setGeometry(option.rect);
}

void RuleSetCustom::targetRuleRefresh(const QModelIndex& idx)
{
	auto rule_insv = _view._ruleset->_bind[idx.row()];

	auto offset_index = idx.sibling(idx.row(), 1);
	auto offset_number = offset_index.data(Qt::DisplayRole).toInt();
	rule_insv.second->setOffsetSpan(offset_number);

	auto count_index = idx.sibling(idx.row(), 3);
	_view._seqs_model->setData(offset_index, rule_insv.second->offsetSpan(), Qt::EditRole);
	_view._seqs_model->setData(count_index, rule_insv.second->countWithin(), Qt::EditRole);

	auto param_index = idx.sibling(idx.row(), 4);
	QJsonObject obj;
	rule_insv.second->saveTo(obj);
	auto bytes = QJsonDocument(obj).toJson(QJsonDocument::Compact);
	_view._seqs_model->setData(param_index, QString::fromUtf8(bytes));

	this->resizeColumnsToContents();
}

void RuleSetCustom::peersRuleChanged(const QModelIndex& idx)
{
	auto field_idx = idx.sibling(idx.row(), 0);
	auto field_name = field_idx.data(Qt::DisplayRole).toString();

	auto rule_idx = idx.sibling(idx.row(), 2);
	auto rule_name = rule_idx.data(Qt::DisplayRole).toString();

	auto rule_nm = _view.base->extractUnitList()[rule_name];
	auto new_inst = std::dynamic_pointer_cast<ExtractUnit>(rule_nm->newDefault());
	_view._ruleset->_bind.replace(idx.row(), std::make_pair(field_name, new_inst));

	// 对ListUnit执行特殊初始化步骤
	if (typeid(*new_inst.get()) == typeid(BytesAsList)) {
		auto conv = std::dynamic_pointer_cast<BytesAsList>(new_inst);
		if (!conv->elementRule()) {
			conv->appendElementRule(this->_view.base->defaultExtractUnit());
		}

		if (!conv->sizeProvider()) {
			conv->setSizeProvider(this->_view.base->defaultSizeProvider());
		}
	}

	targetRuleRefresh(idx);
}

void RuleSetCustom::showEvent(QShowEvent* e)
{
	QTableView::showEvent(e);

	membersPresent(this->_view._ruleset, this->_view._seqs_model);
}

#include <QItemSelectionModel>
RuleSetCustom::RuleSetCustom(std::shared_ptr<TranslateBasic> base,
	std::shared_ptr<extract::BytesAsRuleSet> rule_set, QWidget* p /*= nullptr*/)
	:QTableView(p)
{
	_view._ruleset = rule_set;
	_view._seqs_model = new QStandardItemModel();
	_view.base = std::make_shared<TranslateBasic>();

	this->setModel(_view._seqs_model);
	_view._seqs_model->setHorizontalHeaderLabels(QStringList()
		<< tr(u8"Field Name") << tr(u8"Bytes Offset") << tr(u8"Translate Rule")
		<< tr(u8"Bytes Count") << tr(u8"Arguments"));

	auto int_delegate = new IntDelegate(0, INT_MAX);
	this->setItemDelegateForColumn(1, int_delegate);
	auto rule_delegate = new RuleSelectDelegate(_view.base);
	this->setItemDelegateForColumn(2, rule_delegate);

	this->setContextMenuPolicy(Qt::CustomContextMenu);
	connect(this, &QTableView::customContextMenuRequested, this, &RuleSetCustom::customTranslateRuleEdit);
	connect(rule_delegate, &RuleSelectDelegate::dataChanged, this, &RuleSetCustom::peersRuleChanged);
	connect(int_delegate, &IntDelegate::valueChanged, this, &RuleSetCustom::targetRuleRefresh);

	connect(this, &QTableView::clicked, [=](const QModelIndex& curr) {
		if (!curr.isValid())
			return;

		emit this->currentRuleChanged(_view._ruleset->_bind[curr.row()].second, curr);
		});
}

#include <QMenu>
void RuleSetCustom::customTranslateRuleEdit(const QPoint& pos)
{
	QMenu immediate;
	immediate.addAction(u8"Add Unit", this, &RuleSetCustom::addTranslateUnit);
	immediate.addAction(u8"Remove Unit", this, &RuleSetCustom::removeTranslateUnit);
	immediate.exec(this->mapToGlobal(pos));
}

void RuleSetCustom::addTranslateUnit()
{
	auto curr_rule = _view.base->defaultExtractUnit()->newDefault();
	this->_view._ruleset->_bind.append(
		QString(u8"rule_%1").arg(_view._ruleset->_bind.sub_units.size()),
		std::static_pointer_cast<ExtractUnit>(curr_rule));

	auto hex_rule = std::static_pointer_cast<BytesAsHex>(curr_rule);
	hex_rule->setCountWithin(1);

	membersPresent(this->_view._ruleset, this->_view._seqs_model);
}

void RuleSetCustom::removeTranslateUnit()
{
	auto idx_curr = this->currentIndex();
	if (!idx_curr.isValid())
		return;

	_view._ruleset->_bind.removeAt(idx_curr.row());
	_view._seqs_model->removeRow(idx_curr.row());
}

void RuleSetCustom::membersPresent(std::shared_ptr<extract::BytesAsRuleSet> ruleset, QStandardItemModel* model)
{
	model->removeRows(0, model->rowCount());

	auto units = ruleset->_bind.sub_units;
	for (auto uidx = 0; uidx < units.size(); ++uidx) {
		auto u_pair = units.at(uidx);

		QList<QStandardItem*> new_row;
		new_row << new QStandardItem(u_pair.first);
		new_row << new QStandardItem(QString("%1").arg(u_pair.second->offsetSpan()));
		new_row << new QStandardItem(_view.base->defaultExtractUnit()->name());
		new_row << new QStandardItem(QString("%1").arg(u_pair.second->countWithin()));
		new_row.last()->setEditable(false);

		QJsonObject  obj;
		u_pair.second->saveTo(obj);
		auto bytes = QJsonDocument(obj).toJson(QJsonDocument::Compact);
		auto json_doc = QString::fromUtf8(bytes);
		new_row << new QStandardItem(json_doc);
		new_row.last()->setEditable(false);

		this->_view._seqs_model->appendRow(new_row);
	}

	this->resizeColumnsToContents();
}

RuleSelectDelegate::RuleSelectDelegate(std::shared_ptr<TranslateBasic> ins)
	:_kernel(ins) {
}

#include <QComboBox>
QWidget* RuleSelectDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	return new QComboBox(parent);
}

void RuleSelectDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
	auto rule_names = this->_kernel->extractUnitList().keys();
	std::sort(rule_names.begin(), rule_names.end());

	auto combo = dynamic_cast<QComboBox*>(editor);
	combo->addItems(rule_names);
	combo->setCurrentText(index.data(Qt::DisplayRole).toString());
}

void RuleSelectDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
{
	auto rule_name = dynamic_cast<QComboBox*>(editor)->currentText();
	model->setData(index, rule_name, Qt::EditRole);

	emit this->dataChanged(index);
}

void RuleSelectDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	editor->setGeometry(option.rect);
}