// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include "graphics.h"
#include <QListView>
#include <QVBoxLayout>
#include <QDebug>

extern GraphicsDebugger g_debugger;

GPUCommandStreamItemModel::GPUCommandStreamItemModel(QObject* parent) : QAbstractListModel(parent), command_count(0)
{
    connect(this, SIGNAL(GXCommandFinished(int)), this, SLOT(OnGXCommandFinishedInternal(int)));
}

int GPUCommandStreamItemModel::rowCount(const QModelIndex& parent) const
{
    return command_count;
}

QVariant GPUCommandStreamItemModel::data(const QModelIndex& index, int role) const
{
    if (!index.isValid())
        return QVariant();

    int command_index = index.row();
    const GSP_GPU::Command& command = GetDebugger()->ReadGXCommandHistory(command_index);
    if (role == Qt::DisplayRole)
    {
        std::map<GSP_GPU::CommandId, const char*> command_names = {
            { GSP_GPU::CommandId::REQUEST_DMA, "REQUEST_DMA" },
            { GSP_GPU::CommandId::SET_COMMAND_LIST_FIRST, "SET_COMMAND_LIST_FIRST" },
            { GSP_GPU::CommandId::SET_MEMORY_FILL, "SET_MEMORY_FILL" },
            { GSP_GPU::CommandId::SET_DISPLAY_TRANSFER, "SET_DISPLAY_TRANSFER" },
            { GSP_GPU::CommandId::SET_TEXTURE_COPY, "SET_TEXTURE_COPY" },
            { GSP_GPU::CommandId::SET_COMMAND_LIST_LAST, "SET_COMMAND_LIST_LAST" }
        };
        const u32* command_data = reinterpret_cast<const u32*>(&command);
        QString str = QString("%1 %2 %3 %4 %5 %6 %7 %8 %9").arg(command_names[command.id])
                        .arg(command_data[0], 8, 16, QLatin1Char('0'))
                        .arg(command_data[1], 8, 16, QLatin1Char('0'))
                        .arg(command_data[2], 8, 16, QLatin1Char('0'))
                        .arg(command_data[3], 8, 16, QLatin1Char('0'))
                        .arg(command_data[4], 8, 16, QLatin1Char('0'))
                        .arg(command_data[5], 8, 16, QLatin1Char('0'))
                        .arg(command_data[6], 8, 16, QLatin1Char('0'))
                        .arg(command_data[7], 8, 16, QLatin1Char('0'));
        return QVariant(str);
    }
    else
    {
        return QVariant();
    }
}

void GPUCommandStreamItemModel::GXCommandProcessed(int total_command_count)
{
    emit GXCommandFinished(total_command_count);
}

void GPUCommandStreamItemModel::OnGXCommandFinishedInternal(int total_command_count)
{
    if (total_command_count == 0)
        return;

    int prev_command_count = command_count;
    command_count = total_command_count;
    emit dataChanged(index(prev_command_count,0), index(total_command_count-1,0));
}


GPUCommandStreamWidget::GPUCommandStreamWidget(QWidget* parent) : QDockWidget(tr("Graphics Debugger"), parent)
{
    setObjectName("GraphicsDebugger");

    GPUCommandStreamItemModel* command_model = new GPUCommandStreamItemModel(this);
    g_debugger.RegisterObserver(command_model);

    QListView* command_list = new QListView;
    command_list->setModel(command_model);
    command_list->setFont(QFont("monospace"));

    setWidget(command_list);
}
