/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
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#include "gdbplainengine.h"

#include <debugger/debuggeractions.h>
#include <debugger/debuggercore.h>
#include <debugger/debuggerprotocol.h>
#include <debugger/debuggerstartparameters.h>

#include <utils/hostosinfo.h>
#include <utils/qtcassert.h>

#include <QFileInfo>

namespace Debugger {
namespace Internal {

#define CB(callback) [this](const DebuggerResponse &r) { callback(r); }

GdbPlainEngine::GdbPlainEngine(bool useTerminal)
    : GdbEngine(useTerminal)
{
    // Output
    connect(&m_outputCollector, &OutputCollector::byteDelivery,
            this, &GdbEngine::readDebuggeeOutput);
}

void GdbPlainEngine::setupInferior()
{
    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
    setEnvironmentVariables();
    const DebuggerRunParameters &rp = runParameters();
    if (!rp.inferior.workingDirectory.isEmpty())
        runCommand({"cd " + rp.inferior.workingDirectory});
    if (!rp.inferior.commandLineArguments.isEmpty()) {
        QString args = rp.inferior.commandLineArguments;
        runCommand({"-exec-arguments " + args});
    }

    QString executable = QFileInfo(runParameters().inferior.executable).absoluteFilePath();
    runCommand({"-file-exec-and-symbols \"" + executable + '"',
                CB(handleFileExecAndSymbols)});
}

void GdbPlainEngine::handleFileExecAndSymbols(const DebuggerResponse &response)
{
    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
    if (response.resultClass == ResultDone) {
        handleInferiorPrepared();
    } else {
        QString msg = response.data["msg"].data();
        // Extend the message a bit in unknown cases.
        if (!msg.endsWith("File format not recognized"))
            msg = tr("Starting executable failed:") + '\n' + msg;
        notifyInferiorSetupFailed(msg);
    }
}

void GdbPlainEngine::runEngine()
{
    if (runParameters().useContinueInsteadOfRun)
        runCommand({"-exec-continue", DebuggerCommand::RunRequest, CB(handleExecuteContinue)});
    else
        runCommand({"-exec-run", DebuggerCommand::RunRequest, CB(handleExecRun)});
}

void GdbPlainEngine::handleExecRun(const DebuggerResponse &response)
{
    QTC_ASSERT(state() == EngineRunRequested, qDebug() << state());
    if (response.resultClass == ResultRunning) {
        notifyEngineRunAndInferiorRunOk(); // For gdb < 7.0
        //showStatusMessage(tr("Running..."));
        showMessage("INFERIOR STARTED");
        showMessage(msgInferiorSetupOk(), StatusBar);
        // FIXME: That's the wrong place for it.
        if (boolSetting(EnableReverseDebugging))
            runCommand({"target record"});
    } else {
        QString msg = response.data["msg"].data();
        //QTC_CHECK(status() == InferiorRunOk);
        //interruptInferior();
        showMessage(msg);
        notifyEngineRunFailed();
    }
}

void GdbPlainEngine::setupEngine()
{
    QTC_ASSERT(state() == EngineSetupRequested, qDebug() << state());
    showMessage("TRYING TO START ADAPTER");

    if (!prepareCommand())
        return;

    QStringList gdbArgs;

    if (!m_outputCollector.listen()) {
        handleAdapterStartFailed(tr("Cannot set up communication with child process: %1")
                .arg(m_outputCollector.errorString()));
        return;
    }
    gdbArgs.append("--tty=" + m_outputCollector.serverName());

    startGdb(gdbArgs);
}

void GdbPlainEngine::handleGdbStartFailed()
{
    m_outputCollector.shutdown();
}

void GdbPlainEngine::interruptInferior2()
{
    interruptLocalInferior(inferiorPid());
}

void GdbPlainEngine::shutdownEngine()
{
    showMessage(QString("PLAIN ADAPTER SHUTDOWN %1").arg(state()));
    m_outputCollector.shutdown();
    notifyAdapterShutdownOk();
}

} // namespace Debugger
} // namespace Internal