#include "LMainWindow.h"
#include "PluginContentWidget.h"
#include "PluginContentWidgetContextBase.h"
#include "PluginModule.h"
#include "PluginRegister.h"

#include <QDebug>
#include <QMenuBar>
#include <QStatusBar>
#include <QToolBar>

namespace LMainWindow_details {

	class LMainWindowContentContext: public PluginContentWidgetContextBase {
	public:
		explicit LMainWindowContentContext(LMainWindow *window)
			: m_window(window)
		{}

		void setCaption(PluginContentWidget *content, const QString &caption, const QString &hint = {}) override
		{
			m_window->setTabCaptionForWidget(content, caption, hint);
		}

		void setIcon(PluginContentWidget *content, const QString &iconname) override
		{
			m_window->setTabIcon(content, iconname);
		}

		void showStatusMessage(const QString &msg) override
		{
			m_window->statusBar()->showMessage(msg);
		}

		void addContentWidget(PluginModule *module, PluginContentWidget *widget) override
		{
			PluginContentWidgetContextBase::addContentWidget(module, widget);
			m_window->addPage(widget, "");
		}

		QWidget* container() override
		{
			return m_window;
		}
	private:
		LMainWindow *m_window;
	};

}
using namespace LMainWindow_details;



LMainWindow::LMainWindow(QWidget *parent)
	: QMainWindow(parent)
{
	m_context = new LMainWindowContentContext(this);

	m_tabWidget = new QTabWidget(this);
	m_tabWidget->setObjectName(QString::fromUtf8("tabWidget"));
	m_tabWidget->setDocumentMode(true);

	setCentralWidget(m_tabWidget);

	// menu
	auto menuBar = new QMenuBar(this);
	setMenuBar(menuBar);

	// tooolbar
	m_mainToolBar = new QToolBar(this);
	addToolBar(Qt::TopToolBarArea, m_mainToolBar);

	// statusbar
	auto statusBar = new QStatusBar(this);
	setStatusBar(statusBar);

	m_fileMenu = new QMenu(tr("File"), this);

	createActions();
	m_mainToolBar->addAction(m_closeAction);

	connect(m_tabWidget, &QTabWidget::tabCloseRequested, this, &LMainWindow::tabWidget_tabCloseRequested);
	connect(m_tabWidget, &QTabWidget::currentChanged, this, &LMainWindow::tabWidget_currentChanged);
}

LMainWindow::~LMainWindow()
{
	delete m_context;
}

void LMainWindow::initModuleMenus()
{
	menuBar()->addMenu(m_fileMenu);
	addModuleMenuActions();
}

void LMainWindow::addModuleMenuActions()
{
	auto reg = PluginRegister::getInstance();
	auto mods = reg->modules();
	for (auto && mod : mods) {
		auto items = mod.second->menuActions();
		for (auto && item : items) {
			addMenuAction(item);
		}
	}
}

void LMainWindow::createActions()
{
	{
		auto action = m_closeAction = new QAction(this);
		QIcon icon;
		icon.addFile(QString::fromUtf8(":/icons/page_white_delete.png"), QSize(), QIcon::Normal, QIcon::On);
		action->setIcon(icon);
		connect(m_closeAction, &QAction::triggered, this, &LMainWindow::actionClose_triggered);
	}

}


void LMainWindow::addMenuAction(const MenuAction &ma)
{
	qDebug() << "add action " << ma.text();
	//auto ac =
	m_fileMenu->addAction(ma.icon(), ma.text(),
					[ma, this] ()
		{
			ma.perform(m_context);
		},
		ma.shortcut());


//	auto ac = new QAction(this);
//	ac->
}

void LMainWindow::actionClose_triggered()
{
	m_tabWidget->tabCloseRequested(m_tabWidget->currentIndex());
}


void LMainWindow::addPage(PluginContentWidget* page, QString caption)
{
	m_tabWidget->addTab(page, caption);
	m_tabWidget->setCurrentWidget(page);
}

void LMainWindow::setTabCaptionForWidget(QWidget *widget, const QString &caption, const QString &hint)
{
	auto index = m_tabWidget->indexOf(widget);
	m_tabWidget->setTabText(index, caption);
	m_tabWidget->setTabToolTip(index, hint);
}

void LMainWindow::setTabIcon(QWidget *widget, const QString &iconname)
{
	auto index = m_tabWidget->indexOf(widget);
	auto n = ":/icons/16x16/" + iconname;
	m_tabWidget->setTabIcon(index, QIcon(n));
}

IPluginContentWidgetContext* LMainWindow::context()
{
	return m_context;
}

void LMainWindow::tabWidget_tabCloseRequested(int index)
{
	QWidget *widget = m_tabWidget->widget(index);
	PluginContentWidget *plg_page = dynamic_cast<PluginContentWidget*>(widget);
	if (plg_page) {
		if (plg_page->canClose()) {
			m_tabWidget->removeTab(index);
			m_context->removeContentWidget(plg_page);
			delete plg_page;
		}
	}
	else {
		// old behaviour shouldn't be needed any more when all pages have been migrated
		// to PlgPage
		m_tabWidget->removeTab(index);
		delete widget;
	}
}

void LMainWindow::tabWidget_currentChanged(int index)
{
	// remove buttons of old page
	if (m_previousPage) {
		removeModuleWidgetActionsForPage(m_previousPage);
	}

	// add buttons of new page
	PluginContentWidget * page = nullptr;
	if (index >= 0) {
		QWidget *widget = m_tabWidget->widget(index);
		page = dynamic_cast<PluginContentWidget*>(widget);
		if (page) {
			addModuleWidgetActionsForPage(page);
		}
	}
	m_previousPage = page;
}

void LMainWindow::addModuleWidgetActionsForPage(PluginContentWidget *page)
{
	m_context->addWidgetActionsToToolbar(page, m_mainToolBar);
}

void LMainWindow::removeModuleWidgetActionsForPage(PluginContentWidget *page)
{
	m_context->removeWidgetActionsFromToolbar(page, m_mainToolBar);
}