/*
 *  Copyright (C) 2017  Thales Lima Oliveira <thales@ufu.br>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "MathOperation.h"
#include "ConnectionLine.h"
#include <wx/pen.h>
#include <wx/brush.h>

MathOperation::MathOperation(int id) : ControlElement(id)
{
    m_width = m_height = 36.0;
    Node* nodeIn1 = new Node(m_position + wxPoint2DDouble(-18, -9), Node::NodeType::NODE_IN, m_borderSize);
    nodeIn1->StartMove(m_position);
    Node* nodeIn2 = new Node(m_position + wxPoint2DDouble(-18, 9), Node::NodeType::NODE_IN, m_borderSize);
    nodeIn2->StartMove(m_position);
    Node* nodeOut = new Node(m_position + wxPoint2DDouble(18, 0), Node::NodeType::NODE_OUT, m_borderSize);
    nodeOut->SetAngle(180.0);
    nodeOut->StartMove(m_position);
    m_nodeList.push_back(nodeIn1);
    m_nodeList.push_back(nodeIn2);
    m_nodeList.push_back(nodeOut);
}

MathOperation::~MathOperation() {}
void MathOperation::Draw(wxPoint2DDouble translation, double scale) const
{
    glLineWidth(1.0);
    if(m_selected) {
        glColor4dv(m_selectionColour.GetRGBA());
        double borderSize = (m_borderSize * 2.0 + 1.0) / scale;
        DrawRectangle(m_position, m_width + borderSize, m_height + borderSize);
    }
    glColor4d(1.0, 1.0, 1.0, 1.0);
    DrawRectangle(m_position, m_width, m_height);
    glColor4d(0.0, 0.0, 0.0, 1.0);
    DrawRectangle(m_position, m_width, m_height, GL_LINE_LOOP);

    // Draw personalized element symbol.
    DrawSymbol();

    glColor4d(0.0, 0.0, 0.0, 1.0);
    DrawNodes();
}

void MathOperation::DrawDC(wxPoint2DDouble translation, double scale, wxGraphicsContext* gc) const
{
    if (m_selected) {
        gc->SetPen(*wxTRANSPARENT_PEN);
        gc->SetBrush(wxBrush(m_selectionColour.GetDcRGBA()));
        double borderSize = (m_borderSize * 2.0 + 1.0) / scale;
        gc->DrawRectangle(m_position.m_x - m_width / 2 - borderSize / 2, m_position.m_y - m_height / 2 - borderSize / 2, m_width + borderSize, m_height + borderSize);
    }
    gc->SetPen(*wxBLACK_PEN);
    gc->SetBrush(*wxWHITE_BRUSH);
    DrawRectangle(m_position, m_width, m_height);
    gc->DrawRectangle(m_position.m_x - m_width / 2, m_position.m_y - m_height / 2, m_width, m_height);

    // Draw personalized element symbol.
    DrawDCSymbol(gc);

    gc->SetPen(*wxTRANSPARENT_PEN);
    gc->SetBrush(*wxBLACK_BRUSH);
    DrawDCNodes(gc);
}

void MathOperation::Rotate(bool clockwise)
{
    if(clockwise)
        m_angle += 90.0;
    else
        m_angle -= 90.0;
    if(m_angle >= 360.0)
        m_angle = 0.0;
    else if(m_angle < 0)
        m_angle = 270.0;

    UpdatePoints();

    for(auto it = m_nodeList.begin(), itEnd = m_nodeList.end(); it != itEnd; ++it) {
        Node* node = *it;
        node->Rotate(clockwise);
    }
}

void MathOperation::UpdatePoints()
{
    if(m_angle == 0.0) {
        m_nodeList[0]->SetPosition(m_position + wxPoint2DDouble(-18, -9));
        m_nodeList[1]->SetPosition(m_position + wxPoint2DDouble(-18, 9));
        m_nodeList[2]->SetPosition(m_position + wxPoint2DDouble(18, 0));
    } else if(m_angle == 90.0) {
        m_nodeList[0]->SetPosition(m_position + wxPoint2DDouble(9, -18));
        m_nodeList[1]->SetPosition(m_position + wxPoint2DDouble(-9, -18));
        m_nodeList[2]->SetPosition(m_position + wxPoint2DDouble(0, 18));
    } else if(m_angle == 180.0) {
        m_nodeList[0]->SetPosition(m_position + wxPoint2DDouble(18, 9));
        m_nodeList[1]->SetPosition(m_position + wxPoint2DDouble(18, -9));
        m_nodeList[2]->SetPosition(m_position + wxPoint2DDouble(-18, 0));
    } else if(m_angle == 270.0) {
        m_nodeList[0]->SetPosition(m_position + wxPoint2DDouble(-9, 18));
        m_nodeList[1]->SetPosition(m_position + wxPoint2DDouble(9, 18));
        m_nodeList[2]->SetPosition(m_position + wxPoint2DDouble(0, -18));
    }
}