#include <QTreeView>

#include "SectionsWidget.h"

#include "MainWindow.h"
#include "common/Helpers.h"

SectionsModel::SectionsModel(QList<SectionDescription> *sections, QObject *parent)
    : QAbstractListModel(parent),
      sections(sections)
{
}

int SectionsModel::rowCount(const QModelIndex &) const
{
    return sections->count();
}

int SectionsModel::columnCount(const QModelIndex &) const
{
    return SectionsModel::ColumnCount;
}

QVariant SectionsModel::data(const QModelIndex &index, int role) const
{
    // TODO: create unique colors, e. g. use HSV color space and rotate in H for 360/size
    static const QList<QColor> colors = { QColor("#1ABC9C"),    //TURQUOISE
                                          QColor("#2ECC71"),    //EMERALD
                                          QColor("#3498DB"),    //PETER RIVER
                                          QColor("#9B59B6"),    //AMETHYST
                                          QColor("#34495E"),    //WET ASPHALT
                                          QColor("#F1C40F"),    //SUN FLOWER
                                          QColor("#E67E22"),    //CARROT
                                          QColor("#E74C3C"),    //ALIZARIN
                                          QColor("#ECF0F1"),    //CLOUDS
                                          QColor("#BDC3C7"),    //SILVER
                                          QColor("#95A5A6")     //COBCRETE
                                        };

    if (index.row() >= sections->count())
        return QVariant();

    const SectionDescription &section = sections->at(index.row());

    switch (role) {
    case Qt::DisplayRole:
        switch (index.column()) {
        case SectionsModel::NameColumn:
            return section.name;
        case SectionsModel::SizeColumn:
            return section.size;
        case SectionsModel::AddressColumn:
            return RAddressString(section.vaddr);
        case SectionsModel::EndAddressColumn:
            return RAddressString(section.vaddr + section.size);
        case SectionsModel::EntropyColumn:
            return section.entropy;
        default:
            return QVariant();
        }
    case Qt::DecorationRole:
        if (index.column() == 0)
            return colors[index.row() % colors.size()];
        return QVariant();
    case SectionsModel::SectionDescriptionRole:
        return QVariant::fromValue(section);
    default:
        return QVariant();
    }
}

QVariant SectionsModel::headerData(int section, Qt::Orientation, int role) const
{
    switch (role) {
    case Qt::DisplayRole:
        switch (section) {
        case SectionsModel::NameColumn:
            return tr("Name");
        case SectionsModel::SizeColumn:
            return tr("Size");
        case SectionsModel::AddressColumn:
            return tr("Address");
        case SectionsModel::EndAddressColumn:
            return tr("EndAddress");
        case SectionsModel::EntropyColumn:
            return tr("Entropy");
        default:
            return QVariant();
        }
    default:
        return QVariant();
    }
}

SectionsProxyModel::SectionsProxyModel(SectionsModel *sourceModel, QObject *parent)
    : QSortFilterProxyModel(parent)
{
    setSourceModel(sourceModel);
    setFilterCaseSensitivity(Qt::CaseInsensitive);
    setSortCaseSensitivity(Qt::CaseInsensitive);
}

bool SectionsProxyModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
{
    auto leftSection = left.data(SectionsModel::SectionDescriptionRole).value<SectionDescription>();
    auto rightSection = right.data(SectionsModel::SectionDescriptionRole).value<SectionDescription>();

    switch (left.column()) {
    case SectionsModel::NameColumn:
        return leftSection.name < rightSection.name;
    case SectionsModel::SizeColumn:
        return leftSection.size < rightSection.size;
    case SectionsModel::AddressColumn:
    case SectionsModel::EndAddressColumn:
        return leftSection.vaddr < rightSection.vaddr;
    case SectionsModel::EntropyColumn:
        return leftSection.entropy < rightSection.entropy;

    default:
        break;
    }

    return false;
}

SectionsWidget::SectionsWidget(MainWindow *main, QAction *action) :
    CutterDockWidget(main, action),
    main(main)
{
    setObjectName("SectionsWidget");
    setWindowTitle(QStringLiteral("Sections"));

    sectionsTable = new QTreeView;
    sectionsModel = new SectionsModel(&sections, this);
    auto proxyModel = new SectionsProxyModel(sectionsModel, this);

    sectionsTable->setModel(proxyModel);

    sectionsTable->setIndentation(10);
    sectionsTable->setSortingEnabled(true);
    sectionsTable->sortByColumn(SectionsModel::NameColumn, Qt::AscendingOrder);

    connect(sectionsTable, SIGNAL(doubleClicked(const QModelIndex &)),
            this, SLOT(onSectionsDoubleClicked(const QModelIndex &)));

    setWidget(sectionsTable);

    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);

    connect(Core(), SIGNAL(refreshAll()), this, SLOT(refreshSections()));
}

SectionsWidget::~SectionsWidget() {}

void SectionsWidget::refreshSections()
{
    sectionsModel->beginResetModel();
    sections = Core()->getAllSections();
    sectionsModel->endResetModel();

    qhelpers::adjustColumns(sectionsTable, SectionsModel::ColumnCount, 0);
}

void SectionsWidget::onSectionsDoubleClicked(const QModelIndex &index)
{
    if (!index.isValid())
        return;

    auto section = index.data(SectionsModel::SectionDescriptionRole).value<SectionDescription>();
    Core()->seek(section.vaddr);
}