#include "storypresent.h"
#include <QFileInfo>
#include <QMessageBox>
#include <QMenu>
#include <QMenuBar>

using namespace dags;
using namespace xast_parse;

StoryPresent::StoryPresent(QWidget* parent)
	: QMainWindow(parent), _story_present(new DAGActiveView(this))
{
	setCentralWidget(_story_present);

	auto mbar = menuBar();
	auto view = mbar->addMenu(u8"视图");
	view->addAction(u8"缩小", this, &StoryPresent::lesser, Qt::CTRL + Qt::Key_N);
	view->addAction(u8"放大", this, &StoryPresent::bigger, Qt::CTRL + Qt::Key_P);
}

StoryPresent::~StoryPresent()
{}

#include "xast_parse.h"
void StoryPresent::loadXAST(const QString& ast_path)
{
	QFileInfo finfo(ast_path);
	if (!finfo.exists() || !finfo.isFile()) {
		QMessageBox::critical(this, u8"文件错误", QString(u8"指定文件（%1）非法！").arg(ast_path));
		return;
	}

	xast_parse::XAST_Parser t(ast_path);
	this->_story_graph = t.storyGraph();

	QList<graph_data::Arrow> arrows;
	for (auto& key : this->_story_graph.keys()) {
		auto story_line = this->_story_graph[key];

		auto arrow_start = story_line->name();
		auto frag_temp = story_line->firstChild();
		while (frag_temp) {
			switch (frag_temp->type()) {
			case SliceType::FragmentDefines: {
					auto arrow_tail = std::dynamic_pointer_cast<FragmentDefine>(frag_temp)->name() + u8"@" + story_line->name();
					arrows << graph_data::Arrow(arrow_start, arrow_tail);
					arrow_start = arrow_tail;
				}break;
			case SliceType::FragmentRefers: {
					auto conv_refer = std::dynamic_pointer_cast<FragmentRefer>(frag_temp);
					auto arrow_tail = conv_refer->fragmentRefer() + u8"@" + conv_refer->storyRefer();
					arrows << graph_data::Arrow(arrow_start, arrow_tail);
					arrow_start = arrow_tail;
				}break;
			default: break;
			}
			frag_temp = frag_temp->nextSlice();
		}
	}

	this->_story_present->updateWithEdges(arrows);
}

#include <QTransform>
void StoryPresent::bigger()
{
	_scale_value *= 1.1;

	QTransform trans_base;
	trans_base.scale(_scale_value, _scale_value);
	this->_story_present->setTransform(trans_base);
}

void StoryPresent::lesser()
{
	_scale_value /= 1.1;

	QTransform trans_base;
	trans_base.scale(_scale_value, _scale_value);
	this->_story_present->setTransform(trans_base);
}