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#include "coregdbadapter.h"

#include "debuggerstartparameters.h"
#include "debuggercore.h"
#include "debuggeractions.h"
#include "debuggerstringutils.h"
#include "gdbmi.h"
#include "gdbengine.h"

#include <utils/qtcassert.h>

#include <QDir>
#include <QFileInfo>
#include <QMessageBox>

namespace Debugger {
namespace Internal {

#define CB(callback) \
    static_cast<GdbEngine::AdapterCallback>(&CoreGdbAdapter::callback), \
    STRINGIFY(callback)

///////////////////////////////////////////////////////////////////////
//
// CoreGdbAdapter
//
///////////////////////////////////////////////////////////////////////

static QByteArray coreName(const DebuggerStartParameters &sp)
{
    QFileInfo fi(sp.coreFile);
    return fi.absoluteFilePath().toLocal8Bit();
}

CoreGdbAdapter::CoreGdbAdapter(GdbEngine *engine)
  : AbstractGdbAdapter(engine),
    m_executable(startParameters().executable),
    m_coreName(coreName(startParameters()))
{}

void CoreGdbAdapter::startAdapter()
{
    QTC_ASSERT(state() == EngineSetupRequested, qDebug() << state());
    showMessage(_("TRYING TO START ADAPTER"));

    QStringList args;
    args.append(_("-ex"));
    args.append(_("set auto-solib-add off"));
    if (!m_engine->startGdb(args, QString()))
        return;

    //if (m_executable.isEmpty()) {
    //    showMessageBox(QMessageBox::Warning,
    //        tr("Error Loading Symbols"),
    //        tr("No executable to load symbols from specified."));
    //}

#ifdef Q_OS_LINUX
    const bool canUseExeFromCore = true;
#else
    const bool canUseExeFromCore = false;
#endif

    if (!m_executable.isEmpty()) {
        m_engine->notifyEngineSetupOk();
    } else if (canUseExeFromCore) {
        // Extra round trip to get executable name from core file.
        // This is sometimes not the full name, so it can't be used
        // as the generic solution.

        // Quoting core name below fails in gdb 6.8-debian.
        m_engine->postCommand("target core " + m_coreName,
            CB(handleTemporaryTargetCore));
    } else {
        QString msg = tr("The name of the binary file cannot be extracted "
            "from this core file.");
        msg += _(" ");
        msg += tr("Try to specify the binary using the "
            "<i>Debug->Start Debugging->Attach to Core</i> dialog.");
        showMessageBox(QMessageBox::Warning,
            tr("Loading core file failed"), msg);
        m_engine->notifyEngineSetupFailed();
    }
}

void CoreGdbAdapter::handleTemporaryTargetCore(const GdbResponse &response)
{
    QTC_ASSERT(state() == EngineSetupRequested, qDebug() << state());
    if (response.resultClass != GdbResultDone) {
        showMessage(tr("Attach to core failed."), StatusBar);
        m_engine->notifyEngineSetupFailed();
        return;
    }

    QByteArray console = response.consoleStreamOutput;
    int pos1 = console.indexOf('`');
    int pos2 = console.indexOf('\'');
    if (pos1 == -1 || pos2 == -1) {
        showMessage(tr("Attach to core failed."), StatusBar);
        m_engine->notifyEngineSetupFailed();
        return;
    }

    m_executable = QLatin1String(console.mid(pos1 + 1, pos2 - pos1 - 1));
    // Strip off command line arguments. FIXME: make robust.
    int idx = m_executable.indexOf(QLatin1Char(' '));
    if (idx >= 0)
        m_executable.truncate(idx);
    if (m_executable.isEmpty()) {
        m_engine->postCommand("detach");
        m_engine->notifyEngineSetupFailed();
        return;
    }
    m_executable = QFileInfo(startParameters().coreFile).absoluteDir()
                   .absoluteFilePath(m_executable);
    showMessage(tr("Attached to core temporarily."), StatusBar);
    m_engine->postCommand("detach", CB(handleTemporaryDetach));
}

void CoreGdbAdapter::handleTemporaryDetach(const GdbResponse &response)
{
    QTC_ASSERT(state() == EngineSetupRequested, qDebug() << state());
    if (response.resultClass == GdbResultDone) {
        m_engine->notifyEngineSetupOk();
    } else {
        m_engine->notifyEngineSetupFailed();
    }
}

void CoreGdbAdapter::setupInferior()
{
    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
    // Do that first, otherwise no symbols are loaded.
    QFileInfo fi(m_executable);
    const QByteArray sysroot = startParameters().sysroot.toLocal8Bit();
    QByteArray path = fi.absoluteFilePath().toLocal8Bit();
    if (!sysroot.isEmpty())
        m_engine->postCommand("set sysroot " + sysroot);
    m_engine->postCommand("-file-exec-and-symbols \"" + path + '"',
         CB(handleFileExecAndSymbols));
}

void CoreGdbAdapter::handleFileExecAndSymbols(const GdbResponse &response)
{
    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
    if (response.resultClass == GdbResultDone) {
        showMessage(tr("Symbols found."), StatusBar);
        m_engine->postCommand("target core " + m_coreName,
            CB(handleTargetCore));
        return;
    }
    QString msg = tr("No symbols found in core file <i>%1</i>.")
        .arg(startParameters().coreFile);
    msg += _(" ");
    msg += tr("This can be caused by a path length limitation in the "
        "core file.");
    msg += _(" ");
    msg += tr("Try to specify the binary using the "
        "<i>Debug->Start Debugging->Attach to Core</i> dialog.");
    m_engine->notifyInferiorSetupFailed(msg);
}

void CoreGdbAdapter::handleTargetCore(const GdbResponse &response)
{
    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
    if (response.resultClass == GdbResultDone) {
        // HACK: The namespace is not accessible in the initial run.
        m_engine->loadPythonDumpers();
        showMessage(tr("Attached to core."), StatusBar);
        m_engine->handleInferiorPrepared();
        // Due to the auto-solib-add off setting, we don't have any
        // symbols yet. Load them in order of importance.
        m_engine->reloadStack(true);
        m_engine->postCommand("info shared", CB(handleModulesList));
        return;
    }
    QString msg = tr("Attach to core \"%1\" failed:\n")
        .arg(startParameters().coreFile)
        + QString::fromLocal8Bit(response.data.findChild("msg").data());
    m_engine->notifyInferiorSetupFailed(msg);
}

void CoreGdbAdapter::handleModulesList(const GdbResponse &response)
{
    m_engine->handleModulesList(response);
    loadSymbolsForStack();
}

void CoreGdbAdapter::loadSymbolsForStack()
{
    m_engine->loadSymbolsForStack();
    QTimer::singleShot(1000, this, SLOT(loadAllSymbols()));
}

void CoreGdbAdapter::loadAllSymbols()
{
    m_engine->loadAllSymbols();
}

void CoreGdbAdapter::runEngine()
{
    QTC_ASSERT(state() == EngineRunRequested, qDebug() << state());
    m_engine->notifyInferiorUnrunnable();
    m_engine->updateAll();
}

void CoreGdbAdapter::interruptInferior()
{
    // A core never runs, so this cannot be called.
    QTC_CHECK(false);
}

void CoreGdbAdapter::shutdownInferior()
{
    m_engine->notifyInferiorShutdownOk();
}

void CoreGdbAdapter::shutdownAdapter()
{
    m_engine->notifyAdapterShutdownOk();
}

} // namespace Internal
} // namespace Debugger
