#include "ExtractRuleView.h"
#include "TranslateBasic.h"
#include "extract_basic.h"
#include "WrapConfigs.h"
#include <QGridLayout>
#include <QLabel>
#include <QComboBox>
#include <QJsonDocument>
#include <QPushButton>
#include <QSplitter>
#include <QGroupBox>
#include <QTabWidget>
#include <QTextCodec>
#include <QMenu>
#include <QHeaderView>

using namespace unit_configurations;
using namespace size_provider;
using namespace extract;

ExtractRuleView::ExtractRuleView(std::shared_ptr<TranslateBasic> base,
	std::shared_ptr<extract::AsRuleSet> inst_r, QWidget* p /*= nullptr*/)
	: QWidget(p), _rule_base(inst_r), _base_bind(base),
	_member_units(new QTableView(this)),
	_member_model(new QStandardItemModel(this)),
	_configs_stack(new QStackedWidget(this))
{
	this->_current_fields_cache = std::make_shared<FieldManagerLayer>("", nullptr);

	auto layout = new QVBoxLayout(this);
	auto split = new QSplitter(Qt::Horizontal, this);
	layout->addWidget(split);

	split->addWidget(_member_units);
	split->addWidget(_configs_stack);

	_configs_stack->addWidget(new configurations::EmptyConfiguration(this));
	auto single_configs = new SingleBasedConfiguration(base, this);
	_configs_stack->addWidget(single_configs);
	auto list_configs = new ListBasedConfiguration(base, this);
	_configs_stack->addWidget(list_configs);
	auto union_configs = new UnionBasedConfiguration(base, this);
	_configs_stack->addWidget(union_configs);

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

		auto unit = _rule_base->operator[](target.row());
		if (unit->baseType() == SingleBasedUnit::topic()) {
			_configs_stack->setCurrentIndex(1);
			single_configs->currentAccept(unit, target);
		}
		else if (unit->baseType() == ListBasedUnit::topic()) {
			_configs_stack->setCurrentIndex(2);
			list_configs->currentAccept(unit, target);
		}
		else if (unit->baseType() == UnionBasedUnit::topic()) {
			_configs_stack->setCurrentIndex(3);
			union_configs->currentAccept(unit, target);
		}
		else {
			_configs_stack->setCurrentIndex(0);
		}
		});

	_member_units->setModel(_member_model);
	_member_model->setHorizontalHeaderLabels(QStringList() << "FieldName" << "OffsetSpan" << "UnitType");
	_member_units->setContextMenuPolicy(Qt::CustomContextMenu);
	connect(_member_units, &QTableView::customContextMenuRequested, [=](const QPoint& pt) {
		QMenu m;
		m.addAction("Append Unit", this, &ExtractRuleView::appendUnit);
		m.exec(_member_units->mapToGlobal(pt));
		});
}

void ExtractRuleView::reload()
{
	auto cnt = _member_model->rowCount();
	_member_model->removeRows(0, cnt);

	auto list = _rule_base->fieldNames();
	for (auto key : list) {
		auto field_mbr = _rule_base->operator[](key);
		QList<QStandardItem*> row;
		row << new QStandardItem(field_mbr->name());
		row << new QStandardItem(QString("%1").arg(field_mbr->offsetSpan()));
		row.last()->setEditable(false);
		row << new QStandardItem(field_mbr->baseType());
		_member_model->appendRow(row);
	}
	_member_units->resizeColumnsToContents();
}

#include <QInputDialog>
void ExtractRuleView::appendUnit()
{
	auto name_u = QInputDialog::getText(this, "FieldName Enter", "Name");
	if (name_u == "")
		return;

	auto inst_u = _base_bind->defaultExtractUnitType()->newDefault();
	auto new_unit = std::dynamic_pointer_cast<SingleBasedUnit>(inst_u);
	new_unit->setName(name_u);
	auto delt_key = _base_bind->delegateAlias().first();
	auto delt_o = _base_bind->operator[](delt_key);
	auto delt_u = delt_o->newDefault();
	QJsonObject content;
	delt_o->saveTo(content);
	delt_u->loadFrom(_base_bind, content);
	new_unit->setDelegate(std::dynamic_pointer_cast<ExtractDelegate>(delt_u));
	this->_rule_base->append(new_unit);

	reload();
}

void ExtractRuleView::showEvent(QShowEvent* e)
{
	QWidget::showEvent(e);

	reload();
}

ListBasedConfiguration::ListBasedConfiguration(
	std::shared_ptr<TranslateBasic> core, QWidget* p /*= nullptr*/)
	:QWidget(p), _bind_core(core),
	_offset_enter(new QSpinBox(this)),
	_delegate_sync(new QPushButton("Sync", this)),
	_delegate_select(new QComboBox(this)),
	_size_layout_select(new QComboBox(this)),
	_configs_stack(new QStackedWidget(this)),
	_content_display(new QTextBrowser(this)),
	_const_number_input(new QSpinBox(this)),
	_prev_field_refer(new QComboBox(this))
{
	auto layout = new QGridLayout(this);
	layout->addWidget(new QLabel("OffsetSpan:", this), 0, 0);
	layout->addWidget(this->_offset_enter, 0, 1);
	layout->addWidget(this->_delegate_sync, 0, 2);
	layout->addWidget(new QLabel(tr("Delegate:")), 1, 0);
	layout->addWidget(_delegate_select, 1, 1, 1, 2);
	layout->addWidget(new QLabel(tr("Size:")), 2, 0);
	layout->addWidget(_size_layout_select, 2, 1, 1, 2);

	layout->addWidget(_configs_stack, 3, 0, 2, 3);
	_configs_stack->addWidget(_const_number_input);
	_configs_stack->addWidget(_prev_field_refer);

	layout->addWidget(this->_content_display, 5, 0, 3, 3);

	layout->setRowStretch(7, 1);
	layout->setColumnStretch(1, 1);

	connect(_offset_enter, QOverload<int>::of(&QSpinBox::valueChanged),
		[=](int v) {
			this->_bind_u->setOffsetSpan(v);

			currentAccept(_bind_u, _bind_index, _fields_getter);
			emit this->reloadRequest();
		});
	connect(_delegate_select, QOverload<const QString&>::of(&QComboBox::currentTextChanged),
		[=](const QString& current_delegate) {
			auto delt_o = _bind_core->operator[](current_delegate);
			QJsonObject object;
			delt_o->saveTo(object);
			auto delt_ins = delt_o->newDefault();
			delt_ins->loadFrom(_bind_core, object);
			_bind_u->setDelegate(std::dynamic_pointer_cast<ExtractDelegate>(delt_ins));

			currentAccept(_bind_u, _bind_index, _fields_getter);
			emit this->reloadRequest();
		});
	connect(_size_layout_select, QOverload<const QString&>::of(&QComboBox::currentTextChanged),
		[=](const QString& size_provider_name) {
			auto size_o = _bind_core->sizeProviderMap()[size_provider_name];
			auto size_ins = std::dynamic_pointer_cast<SizeProvider>(size_o->newDefault());
			this->_bind_u->setSizeProvider(size_ins);

			if (size_provider_name == ConstNumberProvider::topic()) {
				_configs_stack->setCurrentIndex(0);
				size_ins->setExpression("0");
				_const_number_input->setValue(0);
			}
			if (size_provider_name == InterpretedNumberPrivider::topic()) {
				_configs_stack->setCurrentIndex(1);
				QSignalBlocker s(_prev_field_refer);
				_prev_field_refer->clear();
				s.unblock();
				auto fields_map = _fields_getter->prevFields();
				for (auto field_name : fields_map.keys()) {
					_prev_field_refer->addItem(field_name, (int)fields_map[field_name]);
				}
			}

			currentAccept(_bind_u, _bind_index, _fields_getter);
			emit this->reloadRequest();
		});
	connect(_const_number_input, QOverload<int>::of(&QSpinBox::valueChanged),
		[=](int value) {
			auto size_ins = _bind_u->sizeProvider();
			size_ins->setExpression(QString("%1").arg(value));

			currentAccept(_bind_u, _bind_index, _fields_getter);
			emit this->reloadRequest();
		});
	connect(_prev_field_refer, QOverload<const QString&>::of(&QComboBox::currentTextChanged),
		[=](const QString& current_field) {
			auto size_ins = _bind_u->sizeProvider();
			size_ins->setExpression(current_field);

			currentAccept(_bind_u, _bind_index, _fields_getter);
			emit this->reloadRequest();
		});
}

void ListBasedConfiguration::currentAccept(std::shared_ptr<ExtractUnit> inst_u,
	const QModelIndex& idx, std::shared_ptr<ScopeFieldsGetter> get)
{
	_bind_u = std::dynamic_pointer_cast<ListBasedUnit>(inst_u);
	_bind_index = idx;
	_fields_getter = get;

	QSignalBlocker v(_offset_enter);
	_offset_enter->setRange(0, INT_MAX);
	_offset_enter->setValue(inst_u->offsetSpan());

	QSignalBlocker vx(_delegate_select);
	this->_bind_u = std::dynamic_pointer_cast<extract::ListBasedUnit>(inst_u);
	_delegate_select->clear();
	_delegate_select->addItems(_bind_core->delegateAlias());
	_delegate_select->setCurrentText(this->_bind_u->delegateInst()->aliasName());

	QSignalBlocker vv(_size_layout_select);
	this->_size_layout_select->clear();
	this->_size_layout_select->addItems(_bind_core->sizeProviderMap().keys());
	this->_size_layout_select->setCurrentText(_bind_u->sizeProvider()->name());
	if (this->_size_layout_select->currentText() == ConstNumberProvider::topic()) {
		_configs_stack->setCurrentIndex(0);
		auto size_const = std::dynamic_pointer_cast<ConstNumberProvider>(_bind_u->sizeProvider());
		QSignalBlocker s(_const_number_input);
		_const_number_input->setValue(size_const->value(size_const->expression()));
	}

	if (this->_size_layout_select->currentText() == InterpretedNumberPrivider::topic()) {
		_configs_stack->setCurrentIndex(1);
		auto size_rt = std::dynamic_pointer_cast<InterpretedNumberPrivider>(_bind_u->sizeProvider());
		QSignalBlocker s(_prev_field_refer);
		_prev_field_refer->clear();
		auto fields_map = get->prevFields();
		for (auto field_name : fields_map.keys()) {
			_prev_field_refer->addItem(field_name, (int)fields_map[field_name]);
		}

		_prev_field_refer->setCurrentText(size_rt->expression());
	}

	QJsonObject content;
	_bind_u->saveTo(content);
	_content_display->setText(
		QString::fromUtf8(QJsonDocument(content).toJson())
	);
}

SingleBasedConfiguration::SingleBasedConfiguration(std::shared_ptr<TranslateBasic> core, QWidget* p /*= nullptr*/)
	: QWidget(p), _bind_core(core),
	_offset_enter(new QSpinBox(this)),
	_delegate_changed(new QComboBox(this)),
	_delegate_sync(new QPushButton("Sync", this)),
	_content_display(new QTextBrowser(this))
{
	auto layout = new QGridLayout(this);
	layout->addWidget(new QLabel("Offset:", this), 0, 0);
	layout->addWidget(this->_offset_enter, 0, 1);
	layout->addWidget(this->_delegate_sync, 0, 2);
	layout->addWidget(new QLabel("Delegate:", this), 1, 0);
	layout->addWidget(this->_delegate_changed, 1, 1, 1, 2);
	layout->addWidget(this->_content_display, 2, 0, 3, 3);
	layout->setColumnStretch(1, 1);

	connect(this->_offset_enter, QOverload<int>::of(&QSpinBox::valueChanged),
		[=](int v_offset) {
			inst_current->setOffsetSpan(v_offset);
			currentAccept(this->inst_current, this->idx_current);
			emit this->reloadRequest();
		});
	connect(this->_delegate_changed, QOverload<const QString&>::of(&QComboBox::currentTextChanged),
		[=](const QString& current_alias) {
			auto o_inst = _bind_core->operator[](current_alias);
			auto v_inst = o_inst->newDefault();
			QJsonObject content;
			o_inst->saveTo(content);
			v_inst->loadFrom(_bind_core, content);
			inst_current->setDelegate(std::dynamic_pointer_cast<ExtractDelegate>(v_inst));
			currentAccept(this->inst_current, this->idx_current);
			emit this->reloadRequest();
		});
}

void SingleBasedConfiguration::currentAccept(std::shared_ptr<ExtractUnit> inst_u, const QModelIndex& idx)
{
	inst_current = std::dynamic_pointer_cast<SingleBasedUnit>(inst_u);
	idx_current = idx;

	QSignalBlocker b(_offset_enter);
	_offset_enter->setRange(0, INT_MAX);
	_offset_enter->setValue(inst_u->offsetSpan());

	QSignalBlocker v(_delegate_changed);
	_delegate_changed->clear();
	_delegate_changed->addItems(_bind_core->delegateAlias());
	auto conv = std::dynamic_pointer_cast<SingleBasedUnit>(inst_u);
	_delegate_changed->setCurrentText(conv->delegateInst()->aliasName());

	QJsonObject contents;
	inst_u->saveTo(contents);
	this->_content_display->setPlainText(QString::fromUtf8(
		QJsonDocument(contents).toJson()
	));
}

UnionBasedConfiguration::UnionBasedConfiguration(std::shared_ptr<TranslateBasic> core, QWidget* p /*= nullptr*/)
{

}

void UnionBasedConfiguration::currentAccept(std::shared_ptr<ExtractUnit> inst_u, const QModelIndex& idx)
{

}