#include "mainwidget.h"
#include "dataseriedialog.h"
#include <qxychartseries.h>
#include <QPushButton>
#include <QComboBox>
#include <QSpinBox>
#include <QCheckBox>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QSpacerItem>
#include <QMessageBox>
#include <cmath>
#include <QDebug>

QCHART_USE_NAMESPACE

MainWidget::MainWidget(QWidget *parent) :
    QWidget(parent)
{
    m_chartWidget = new QChartWidget(this);
//    m_chartWidget->resize(QSize(200,200));
//    m_chartWidget->setColor(Qt::red);

    QPushButton *addSeriesButton = new QPushButton("Add series");
    connect(addSeriesButton, SIGNAL(clicked()), this, SLOT(addSeries()));

    // Chart background
    QComboBox *backgroundCombo = new QComboBox(this);
    backgroundCombo->addItem("None");
    backgroundCombo->addItem("TODO Grid");
    backgroundCombo->addItem("TODO Image");
    connect(backgroundCombo, SIGNAL(currentIndexChanged(int)),
            this, SLOT(backgroundChanged(int)));

    // Axis
    // TODO: multiple axes?
    m_autoScaleCheck = new QCheckBox("Automatic scaling");
    connect(m_autoScaleCheck, SIGNAL(stateChanged(int)), this, SLOT(autoScaleChanged(int)));
    // Allow setting also non-sense values (like -2147483648 and 2147483647)
    m_xMinSpin = new QSpinBox();
    m_xMinSpin->setMinimum(INT_MIN);
    m_xMinSpin->setMaximum(INT_MAX);
    m_xMinSpin->setValue(0);
    connect(m_xMinSpin, SIGNAL(valueChanged(int)), this, SLOT(xMinChanged(int)));
    m_xMaxSpin = new QSpinBox();
    m_xMaxSpin->setMinimum(INT_MIN);
    m_xMaxSpin->setMaximum(INT_MAX);
    m_xMaxSpin->setValue(10);
    connect(m_xMaxSpin, SIGNAL(valueChanged(int)), this, SLOT(xMaxChanged(int)));
    m_yMinSpin = new QSpinBox();
    m_yMinSpin->setMinimum(INT_MIN);
    m_yMinSpin->setMaximum(INT_MAX);
    m_yMinSpin->setValue(0);
    connect(m_yMinSpin, SIGNAL(valueChanged(int)), this, SLOT(yMinChanged(int)));
    m_yMaxSpin = new QSpinBox();
    m_yMaxSpin->setMinimum(INT_MIN);
    m_yMaxSpin->setMaximum(INT_MAX);
    m_yMaxSpin->setValue(10);
    connect(m_yMaxSpin, SIGNAL(valueChanged(int)), this, SLOT(yMaxChanged(int)));

    QGridLayout *grid = new QGridLayout();
    QHBoxLayout *hbox = new QHBoxLayout();
    //grid->addWidget(new QLabel("Add series:"), 0, 0);
    grid->addWidget(addSeriesButton, 0, 1);
    grid->addWidget(new QLabel("Background:"), 2, 0);
    grid->addWidget(backgroundCombo, 2, 1);
    grid->addWidget(m_autoScaleCheck, 3, 0);
    grid->addWidget(new QLabel("x min:"), 4, 0);
    grid->addWidget(m_xMinSpin, 4, 1);
    grid->addWidget(new QLabel("x max:"), 5, 0);
    grid->addWidget(m_xMaxSpin, 5, 1);
    grid->addWidget(new QLabel("y min:"), 6, 0);
    grid->addWidget(m_yMinSpin, 6, 1);
    grid->addWidget(new QLabel("y max:"), 7, 0);
    grid->addWidget(m_yMaxSpin, 7, 1);
    // add row with empty label to make all the other rows static
    grid->addWidget(new QLabel(""), 8, 0);
    grid->setRowStretch(8, 1);

    hbox->addLayout(grid);
    hbox->addWidget(m_chartWidget);
    hbox->setStretch(1, 1);

    setLayout(hbox);

    m_autoScaleCheck->setChecked(true);
    chartTypeChanged(4);
    testDataChanged(0);
}

void MainWidget::addSeries()
{
    DataSerieDialog dialog(m_defaultSeries, this);
    connect(&dialog, SIGNAL(accepted(QString, QString)), this, SLOT(addSeries(QString, QString)));
    dialog.exec();
}

void MainWidget::addSeries(QString series, QString data)
{
    qDebug() << "addSeries: " << series << " data: " << data;
    m_defaultSeries = series;

    // TODO: color of the series
    QXYChartSeries* series0 = QXYChartSeries::create();

    if (data == "linear") {
        for (int i = 0; i < 10; i++)
            series0->add(i, 10);
    } else if (data == "linear, 1M") {
        for (int i = 0; i < 1000000; i++)
            series0->add(i, 20);
    } else if (data == "SIN") {
        for (int x = 0; x < 100; x++)
              series0->add(x, abs(sin(3.14159265358979 / 50 * x) * 100));
        QList<QXYChartSeries*> dataset;
        dataset << series0;
    } else if (data == "SIN + random") {
        for (qreal x = 0; x < 100; x += 0.1) {
            series0->add(x + (rand() % 5),
                         abs(sin(3.14159265358979 / 50 * x) * 100) + (rand() % 5));
        }
    } else {
        // TODO: check if data has a valid file name
    }

    if (series == "Scatter") {
        m_chartWidget->addSeries(series0);
    } else if (series == "Line") {
        m_chartWidget->addSeries(series0);
    } else {
        // TODO
    }
}

void MainWidget::chartTypeChanged(int itemIndex)
{
    // TODO: change chart type
    switch (itemIndex) {
    case 4:
        //m_chartWidget->setType(4);
        break;
    default: {
        //m_chartWidget->setType(0);
        break;
    }
    }
}

void MainWidget::testDataChanged(int itemIndex)
{
    qDebug() << "testDataChanged: " << itemIndex;

//    switch (itemIndex) {
//    case 0: {
//        QList<QChartDataPoint> data;
//        for (int x = 0; x < 20; x++) {
//            data.append(QChartDataPoint() << x << x / 2);
//        }
//        m_chartWidget->setData(data);
//        break;
//    }
//    case 1: {
//        QList<QChartDataPoint> data;
//        for (int x = 0; x < 100; x++) {
//            data.append(QChartDataPoint() << x - 200 << 2 * (uint(sin(3.14159/50*x)*80) % 100));
//        }
//        m_chartWidget->setData(data);
//        break;
//    }
//    case 2: {
//        QList<QChartDataPoint> data;
//        for (int x = 0; x < 1000; x++) {
//            data.append(QChartDataPoint() << x - 200 << 2 * (uint(sin(3.14159/50*x)*80) % 100) + (rand() % 100 * 0.2));
//            data.append(QChartDataPoint() << x - 200 << 2 * (uint(sin(3.14159/50*x)*80) % 100) + (rand() % 100 * 0.2));
//            data.append(QChartDataPoint() << x - 200 << 2 * (uint(sin(3.14159/50*x)*80) % 100) + (rand() % 100 * 0.2));
//        }
//        m_chartWidget->setData(data);
//        break;
//    }
//    default:
//        break;
//    }
}

void MainWidget::backgroundChanged(int itemIndex)
{
    qDebug() << "backgroundChanged: " << itemIndex;
}

void MainWidget::autoScaleChanged(int value)
{
    if (value) {
        // TODO: enable auto scaling
    } else {
        // TODO: set scaling manually (and disable auto scaling)
    }

    m_xMinSpin->setEnabled(!value);
    m_xMaxSpin->setEnabled(!value);
    m_yMinSpin->setEnabled(!value);
    m_yMaxSpin->setEnabled(!value);
}

void MainWidget::xMinChanged(int value)
{
    qDebug() << "xMinChanged: " << value;
}

void MainWidget::xMaxChanged(int value)
{
    qDebug() << "xMaxChanged: " << value;
}

void MainWidget::yMinChanged(int value)
{
    qDebug() << "yMinChanged: " << value;
}

void MainWidget::yMaxChanged(int value)
{
    qDebug() << "yMaxChanged: " << value;
}