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** Copyright (C) 2016 The Qt Company Ltd.
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#include "shellcommandpage.h"
#include "shellcommand.h"
#include "outputformatter.h"
#include "qtcassert.h"
#include "theme/theme.h"

#include <QAbstractButton>
#include <QApplication>
#include <QLabel>
#include <QPlainTextEdit>
#include <QVBoxLayout>

/*!
    \class Utils::ShellCommandPage

    \brief The ShellCommandPage implements a page showing the
    progress of a \c ShellCommand.

    Turns complete when the command succeeds.
*/

namespace Utils {

ShellCommandPage::ShellCommandPage(QWidget *parent) :
    WizardPage(parent),
    m_startedStatus(tr("Command started..."))
{
    resize(264, 200);
    auto verticalLayout = new QVBoxLayout(this);
    m_logPlainTextEdit = new QPlainTextEdit;
    m_formatter = new OutputFormatter;
    m_logPlainTextEdit->setReadOnly(true);
    m_formatter->setPlainTextEdit(m_logPlainTextEdit);

    verticalLayout->addWidget(m_logPlainTextEdit);

    m_statusLabel = new QLabel;
    verticalLayout->addWidget(m_statusLabel);
    setTitle(tr("Run Command"));
}

ShellCommandPage::~ShellCommandPage()
{
    QTC_ASSERT(m_state != Running, QApplication::restoreOverrideCursor());
    delete m_formatter;
}

void ShellCommandPage::setStartedStatus(const QString &startedStatus)
{
    m_startedStatus = startedStatus;
}

void ShellCommandPage::start(ShellCommand *command)
{
    if (!command) {
        m_logPlainTextEdit->setPlainText(tr("No job running, please abort."));
        return;
    }

    QTC_ASSERT(m_state != Running, return);
    m_command = command;
    command->setProgressiveOutput(true);
    connect(command, &ShellCommand::stdOutText, this, [this](const QString &text) {
        m_formatter->appendMessage(text, StdOutFormat);
    });
    connect(command, &ShellCommand::stdErrText, this, [this](const QString &text) {
        m_formatter->appendMessage(text, StdErrFormat);
    });
    connect(command, &ShellCommand::finished, this, &ShellCommandPage::slotFinished);
    QApplication::setOverrideCursor(Qt::WaitCursor);
    m_logPlainTextEdit->clear();
    m_overwriteOutput = false;
    m_statusLabel->setText(m_startedStatus);
    m_statusLabel->setPalette(QPalette());
    m_state = Running;
    command->execute();

    wizard()->button(QWizard::BackButton)->setEnabled(false);
}

void ShellCommandPage::slotFinished(bool ok, int exitCode, const QVariant &)
{
    QTC_ASSERT(m_state == Running, return);

    const bool success = (ok && exitCode == 0);
    QString message;
    QPalette palette;

    if (success) {
        m_state = Succeeded;
        message = tr("Succeeded.");
        palette.setColor(QPalette::WindowText, creatorTheme()->color(Theme::TextColorNormal).name());
    } else {
        m_state = Failed;
        message = tr("Failed.");
        palette.setColor(QPalette::WindowText, creatorTheme()->color(Theme::TextColorError).name());
    }

    m_statusLabel->setText(message);
    m_statusLabel->setPalette(palette);

    QApplication::restoreOverrideCursor();
    wizard()->button(QWizard::BackButton)->setEnabled(true);

    if (success)
        emit completeChanged();
    emit finished(success);
}

void ShellCommandPage::terminate()
{
    if (m_command)
        m_command->cancel();
}

bool ShellCommandPage::handleReject()
{
    if (!isRunning())
        return false;

    terminate();
    return true;
}

bool ShellCommandPage::isComplete() const
{
    return m_state == Succeeded;
}

} // namespace Utils