#include "DataFlowModel.h"
#include "FlowGraphModel.h"
#include "FlowTemplateDataModel.h"
#include "ShemeFlowPanel.h"

#include <QtNodes/BasicGraphicsScene>
#include <QtNodes/ConnectionStyle>
#include <QtNodes/DataFlowGraphicsScene>
#include <QtNodes/GraphicsView>
#include <QtNodes/GraphicsViewStyle>
#include <QtNodes/NodeDelegateModelRegistry>

#include <QCheckBox>
#include <QGroupBox>
#include <QHBoxLayout>

using QtNodes::BasicGraphicsScene;
using QtNodes::ConnectionStyle;
using QtNodes::DataFlowGraphicsScene;
using QtNodes::GraphicsView;
using QtNodes::GraphicsViewStyle;
using QtNodes::NodeDelegateModelRegistry;
using QtNodes::NodeRole;
using QtNodes::NodeStyle;

static std::shared_ptr<NodeDelegateModelRegistry> registerDataModels()
{
    auto ret = std::make_shared<NodeDelegateModelRegistry>();

    ret->registerModel<FlowTemplateDataModel>();

    return ret;
}
static FlowGraphModel graphModel;

static void setStyle_()
{
    GraphicsViewStyle::setStyle(
            R"(
  {
    "GraphicsViewStyle": {
      "BackgroundColor": [255, 255, 255],
      "FineGridColor": [255, 255, 255],
      "CoarseGridColor": [255, 255, 255]
    }
  }
  )");

    NodeStyle::setNodeStyle(
            R"(
  {
    "NodeStyle": {
      "NormalBoundaryColor": "darkgray",
      "SelectedBoundaryColor": "deepskyblue",
      "GradientColor0": "mintcream",
      "GradientColor1": "mintcream",
      "GradientColor2": "mintcream",
      "GradientColor3": "mintcream",
      "ShadowColor": [200, 200, 200],
      "FontColor": [10, 10, 10],
      "FontColorFaded": [100, 100, 100],
      "ConnectionPointColor": "white",
      "PenWidth": 2.0,
      "HoveredPenWidth": 2.5,
      "ConnectionPointDiameter": 10.0,
      "Opacity": 1.0
    }
  }
  )");

    ConnectionStyle::setConnectionStyle(
            R"(
  {
    "ConnectionStyle": {
      "ConstructionColor": "gray",
      "NormalColor": "black",
      "SelectedColor": "gray",
      "SelectedHaloColor": "deepskyblue",
      "HoveredColor": "deepskyblue",

      "LineWidth": 3.0,
      "ConstructionLineWidth": 2.0,
      "PointDiameter": 10.0,

      "UseDataDefinedColors": false
    }
  }
  )");
}

ShemeFlowPanel::ShemeFlowPanel(QWidget *parent) : QWidget(parent)
{
    setStyle_();
#if 0
    DataFlowModel *graphModel = new DataFlowModel(registerDataModels());

    // Initialize and connect two nodes.
    {
        NodeId id1 = graphModel->addNode(FlowTemplateData().type().id);
        graphModel->setNodeData(id1, NodeRole::Position, QPointF(0, 0));

        NodeId id2 = graphModel->addNode(FlowTemplateData().type().id);
        graphModel->setNodeData(id2, NodeRole::Position, QPointF(300, 300));

        graphModel->addConnection(ConnectionId { id1, 0, id2, 0 });
    }

    auto scene = new DataFlowGraphicsScene(*graphModel);

    QHBoxLayout *l = new QHBoxLayout(this);

    GraphicsView *view = new GraphicsView(scene);

    l->addWidget(view);

    QGroupBox *groupBox = new QGroupBox("Options");

    QCheckBox *cb1 = new QCheckBox("Nodes are locked");
    QCheckBox *cb2 = new QCheckBox("Connections detachable");
    cb2->setChecked(true);

    QVBoxLayout *vbl = new QVBoxLayout;
    vbl->addWidget(cb1);
    vbl->addWidget(cb2);
    vbl->addStretch();
    groupBox->setLayout(vbl);

    QObject::connect(cb1, &QCheckBox::stateChanged,
                     [graphModel](int state) { graphModel->setNodesLocked(state == Qt::Checked); });

    QObject::connect(cb2, &QCheckBox::stateChanged,
                     [graphModel](int state) { graphModel->setDetachPossible(state == Qt::Checked); });

    l->addWidget(groupBox);

    this->setWindowTitle("Locked Nodes and Connections");
    this->resize(800, 600);
#endif

    // Initialize and connect two nodes.
    {
        NodeId id1 = graphModel.addNode();
        graphModel.setNodeData(id1, NodeRole::Position, QPointF(0, 0));

        NodeId id2 = graphModel.addNode();
        graphModel.setNodeData(id2, NodeRole::Position, QPointF(300, 300));

        graphModel.addConnection(ConnectionId { id1, 0, id2, 0 });
    }

    auto scene = new BasicGraphicsScene(graphModel);

    GraphicsView *view = new GraphicsView(scene);

    //    // Setup context menu for creating new nodes.
    view->setContextMenuPolicy(Qt::ActionsContextMenu);
    QAction *createNodeAction = new QAction(QStringLiteral("Create Node"), view);
    QObject::connect(createNodeAction, &QAction::triggered, [&]() {
        // Mouse position in scene coordinates.
        QPointF posView = view->mapToScene(view->mapFromGlobal(QCursor::pos()));

        NodeId const newId = graphModel.addNode();
        graphModel.setNodeData(newId, NodeRole::Position, posView);
    });
    view->insertAction(view->actions().front(), createNodeAction);

    view->setWindowTitle("Simple Node Graph");
    view->resize(800, 600);

    QHBoxLayout *l = new QHBoxLayout(this);
    l->addWidget(view);
}