/*
    SPDX-FileCopyrightText: KDE Developers

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#include "katenormalinputmode.h"
#include "katecompletionwidget.h"
#include "kateconfig.h"
#include "katedocument.h"
#include "katerenderer.h"
#include "katesearchbar.h"
#include "kateview.h"
#include "kateviewinternal.h"

#include <KLocalizedString>

KateNormalInputMode::KateNormalInputMode(KateViewInternal *viewInternal)
    : KateAbstractInputMode(viewInternal)
{
}

void KateNormalInputMode::activate()
{
    view()->activateEditActions();
}

void KateNormalInputMode::deactivate()
{
    view()->deactivateEditActions();
}

void KateNormalInputMode::reset()
{
    // nothing todo
}

bool KateNormalInputMode::overwrite() const
{
    return view()->doc()->config()->ovr();
}

void KateNormalInputMode::overwrittenChar(const QChar &)
{
    // nothing todo
}

void KateNormalInputMode::clearSelection()
{
    view()->clearSelection();
}

bool KateNormalInputMode::stealKey(QKeyEvent *)
{
    return false;
}

KTextEditor::View::InputMode KateNormalInputMode::viewInputMode() const
{
    return KTextEditor::View::NormalInputMode;
}

QString KateNormalInputMode::viewInputModeHuman() const
{
    return i18n("Normal");
}

KTextEditor::View::ViewMode KateNormalInputMode::viewMode() const
{
    return view()->isOverwriteMode() ? KTextEditor::View::NormalModeOverwrite : KTextEditor::View::NormalModeInsert;
}

QString KateNormalInputMode::viewModeHuman() const
{
    return view()->isOverwriteMode() ? i18n("OVERWRITE") : i18n("INSERT");
}

void KateNormalInputMode::gotFocus()
{
    view()->activateEditActions();
}

void KateNormalInputMode::lostFocus()
{
    view()->deactivateEditActions();
}

void KateNormalInputMode::readSessionConfig(const KConfigGroup &)
{
    // do nothing
}

void KateNormalInputMode::writeSessionConfig(KConfigGroup &)
{
    // do nothing
}

void KateNormalInputMode::updateConfig()
{
    // do nothing
}

void KateNormalInputMode::readWriteChanged(bool)
{
    // inform search bar
    if (m_searchBar) {
        m_searchBar->slotReadWriteChanged();
    }
}

void KateNormalInputMode::find()
{
    KateSearchBar *const bar = searchBar(IncrementalSearchBar);
    view()->bottomViewBar()->addBarWidget(bar);
    view()->bottomViewBar()->showBarWidget(bar);
    bar->setFocus();
}

void KateNormalInputMode::findSelectedForwards()
{
    searchBar(IncrementalSearchBarOrKeepMode)->nextMatchForSelection(view(), KateSearchBar::SearchForward);
}

void KateNormalInputMode::findSelectedBackwards()
{
    searchBar(IncrementalSearchBarOrKeepMode)->nextMatchForSelection(view(), KateSearchBar::SearchBackward);
}

void KateNormalInputMode::findReplace()
{
    KateSearchBar *const bar = searchBar(PowerSearchBar);
    view()->bottomViewBar()->addBarWidget(bar);
    view()->bottomViewBar()->showBarWidget(bar);
    bar->setFocus();
}

void KateNormalInputMode::findNext()
{
    searchBar(IncrementalSearchBarOrKeepMode)->findNext();
}

void KateNormalInputMode::findPrevious()
{
    searchBar(IncrementalSearchBarOrKeepMode)->findPrevious();
}

void KateNormalInputMode::activateCommandLine()
{
    const KTextEditor::Range selection = view()->selectionRange();

    // if the user has selected text, insert the selection's range (start line to end line) in the
    // command line when opened
    if (selection.start().line() != -1 && selection.end().line() != -1) {
        cmdLineBar()->setText(QString::number(selection.start().line() + 1) + QLatin1Char(',') + QString::number(selection.end().line() + 1));
    }
    view()->bottomViewBar()->showBarWidget(cmdLineBar());
    cmdLineBar()->setFocus();
}

KateSearchBar *KateNormalInputMode::searchBar(const SearchBarMode mode)
{
    // power mode wanted?
    const bool wantPowerMode = (mode == PowerSearchBar);

    // create search bar is not there? use right mode
    if (!m_searchBar) {
        m_searchBar.reset(new KateSearchBar(wantPowerMode, view(), KateViewConfig::global()));
    }

    // else: switch mode if needed!
    else if (mode != IncrementalSearchBarOrKeepMode) {
        if (wantPowerMode) {
            m_searchBar->enterPowerMode();
        } else {
            m_searchBar->enterIncrementalMode();
        }
    }

    return m_searchBar.get();
}

KateCommandLineBar *KateNormalInputMode::cmdLineBar()
{
    if (!m_cmdLine) {
        m_cmdLine.reset(new KateCommandLineBar(view(), view()->bottomViewBar()));
        view()->bottomViewBar()->addBarWidget(m_cmdLine.get());
    }

    return m_cmdLine.get();
}

void KateNormalInputMode::updateRendererConfig()
{
    if (m_searchBar) {
        m_searchBar->updateHighlightColors();
    }
}

bool KateNormalInputMode::keyPress(QKeyEvent *e)
{
    // Note: AND'ing with <Shift> is a quick hack to fix Key_Enter
    const int key = e->key() | (e->modifiers() & Qt::ShiftModifier);

    if (view()->isCompletionActive()) {
        if (key == Qt::Key_Tab || key == (Qt::SHIFT | Qt::Key_Backtab).toCombined() || key == Qt::Key_Backtab) {
            if (KateViewConfig::global()->tabCompletion()) {
                e->accept();
                using W = KateCompletionWidget;
                const auto direction = key == Qt::Key_Tab ? W::Down : W::Up;
                view()->completionWidget()->tabCompletion(direction);
                return true;
            }
        }

        const bool isEnter = key == Qt::Key_Enter || key == Qt::Key_Return;
        if (isEnter || key == Qt::Key_Tab) {
            // Are we allowed to execute a completion on enter press?
            if (isEnter && !view()->config()->value(KateViewConfig::EnterToInsertCompletion).toBool()) {
                return false;
            }

            if (view()->completionWidget()->execute()) {
                e->accept();
                return true;
            }
        }
    }

    return false;
}

bool KateNormalInputMode::blinkCaret() const
{
    return true;
}

KTextEditor::caretStyles KateNormalInputMode::caretStyle() const
{
    return view()->isOverwriteMode() ? KTextEditor::caretStyles::Block : KTextEditor::caretStyles::Line;
}

void KateNormalInputMode::toggleInsert()
{
    view()->toggleInsert();
}

void KateNormalInputMode::launchInteractiveCommand(const QString &command)
{
    KateCommandLineBar *cmdLine = cmdLineBar();
    view()->bottomViewBar()->showBarWidget(cmdLine);
    cmdLine->setText(command, false);
}

QString KateNormalInputMode::bookmarkLabel(int) const
{
    return QString();
}