/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2019 Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */


#include <QDialog>
#include <QWidget>
#include <QList>
#include <QListWidgetItem>
#include <QSettings>
#include <QFileDialog>
#include <QThread>
#include "settingsdialog.h"
#include "applicationdialog.h"
#include "applicationlist.h"
#include "translationhandler.h"
#include "codeeditorstyle.h"
#include "codeeditstyledialog.h"
#include "common.h"

SettingsDialog::SettingsDialog(ApplicationList *list,
 TranslationHandler *translator,
 QWidget *parent) :
 QDialog(parent),
 mApplications(list),
 mTempApplications(new ApplicationList(this)),
 mTranslator(translator)
{
 mUI.setupUi(this);
 QSettings settings;
 mTempApplications->copy(list);

 mUI.mJobs->setText(settings.value(SETTINGS_CHECK_THREADS, 1).toString());
 mUI.mForce->setCheckState(boolToCheckState(settings.value(SETTINGS_CHECK_FORCE, false).toBool()));
 mUI.mShowFullPath->setCheckState(boolToCheckState(settings.value(SETTINGS_SHOW_FULL_PATH, false).toBool()));
 mUI.mShowNoErrorsMessage->setCheckState(boolToCheckState(settings.value(SETTINGS_SHOW_NO_ERRORS, false).toBool()));
 mUI.mShowDebugWarnings->setCheckState(boolToCheckState(settings.value(SETTINGS_SHOW_DEBUG_WARNINGS, false).toBool()));
 mUI.mSaveAllErrors->setCheckState(boolToCheckState(settings.value(SETTINGS_SAVE_ALL_ERRORS, false).toBool()));
 mUI.mSaveFullPath->setCheckState(boolToCheckState(settings.value(SETTINGS_SAVE_FULL_PATH, false).toBool()));
 mUI.mInlineSuppressions->setCheckState(boolToCheckState(settings.value(SETTINGS_INLINE_SUPPRESSIONS, false).toBool()));
 mUI.mEnableInconclusive->setCheckState(boolToCheckState(settings.value(SETTINGS_INCONCLUSIVE_ERRORS, false).toBool()));
 mUI.mShowStatistics->setCheckState(boolToCheckState(settings.value(SETTINGS_SHOW_STATISTICS, false).toBool()));
 mUI.mShowErrorId->setCheckState(boolToCheckState(settings.value(SETTINGS_SHOW_ERROR_ID, false).toBool()));
 mUI.mEditPythonPath->setText(settings.value(SETTINGS_PYTHON_PATH, QString()).toString());
 mUI.mEditMisraFile->setText(settings.value(SETTINGS_MISRA_FILE, QString()).toString());

#ifdef Q_OS_WIN
 //mUI.mTabClang->setVisible(true);
 mUI.mEditClangPath->setText(settings.value(SETTINGS_CLANG_PATH, QString()).toString());
 mUI.mEditVsIncludePaths->setText(settings.value(SETTINGS_VS_INCLUDE_PATHS, QString()).toString());
 connect(mUI.mBtnBrowseClangPath, &QPushButton::released, this, &SettingsDialog::browseClangPath);
#else
 mUI.mTabClang->setVisible(false);
#endif
 mCurrentStyle = new CodeEditorStyle(CodeEditorStyle::loadSettings(&settings));
 manageStyleControls();

 connect(mUI.mButtons, &QDialogButtonBox::accepted, this, &SettingsDialog::ok);
 connect(mUI.mButtons, &QDialogButtonBox::rejected, this, &SettingsDialog::reject);
 connect(mUI.mBtnAddApplication, SIGNAL(clicked()),
 this, SLOT(addApplication()));
 connect(mUI.mBtnRemoveApplication, SIGNAL(clicked()),
 this, SLOT(removeApplication()));
 connect(mUI.mBtnEditApplication, SIGNAL(clicked()),
 this, SLOT(editApplication()));
 connect(mUI.mBtnDefaultApplication, SIGNAL(clicked()),
 this, SLOT(defaultApplication()));
 connect(mUI.mListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem *)),
 this, SLOT(editApplication()));

 connect(mUI.mBtnBrowsePythonPath, &QPushButton::clicked, this, &SettingsDialog::browsePythonPath);
 connect(mUI.mBtnBrowseMisraFile, &QPushButton::clicked, this, &SettingsDialog::browseMisraFile);
 connect(mUI.mBtnEditTheme, SIGNAL(clicked()), this, SLOT(editCodeEditorStyle()));
 connect(mUI.mThemeSystem, SIGNAL(released()), this, SLOT(setCodeEditorStyleDefault()));
 connect(mUI.mThemeDark, SIGNAL(released()), this, SLOT(setCodeEditorStyleDefault()));
 connect(mUI.mThemeLight, SIGNAL(released()), this, SLOT(setCodeEditorStyleDefault()));
 connect(mUI.mThemeCustom, SIGNAL(toggled(bool)), mUI.mBtnEditTheme, SLOT(setEnabled(bool)));

 mUI.mListWidget->setSortingEnabled(false);
 populateApplicationList();

 const int count = QThread::idealThreadCount();
 if (count != -1)
 mUI.mLblIdealThreads->setText(QString::number(count));
 else
 mUI.mLblIdealThreads->setText(tr("N/A"));

 loadSettings();
 initTranslationsList();
}

SettingsDialog::~SettingsDialog()
{
 saveSettings();
}

void SettingsDialog::initTranslationsList()
{
 const QString current = mTranslator->getCurrentLanguage();
 QList<TranslationInfo> translations = mTranslator->getTranslations();
 foreach (TranslationInfo translation, translations) {
 QListWidgetItem *item = new QListWidgetItem;
 item->setText(translation.mName);
 item->setData(mLangCodeRole, QVariant(translation.mCode));
 mUI.mListLanguages->addItem(item);
 if (translation.mCode == current || translation.mCode == current.mid(0, 2))
 mUI.mListLanguages->setCurrentItem(item);
 }
}

Qt::CheckState SettingsDialog::boolToCheckState(bool yes)
{
 if (yes) {
 return Qt::Checked;
 }
 return Qt::Unchecked;
}

bool SettingsDialog::checkStateToBool(Qt::CheckState state)
{
 if (state == Qt::Checked) {
 return true;
 }
 return false;
}


void SettingsDialog::loadSettings()
{
 QSettings settings;
 resize(settings.value(SETTINGS_CHECK_DIALOG_WIDTH, 800).toInt(),
 settings.value(SETTINGS_CHECK_DIALOG_HEIGHT, 600).toInt());
}

void SettingsDialog::saveSettings() const
{
 QSettings settings;
 settings.setValue(SETTINGS_CHECK_DIALOG_WIDTH, size().width());
 settings.setValue(SETTINGS_CHECK_DIALOG_HEIGHT, size().height());
}

void SettingsDialog::saveSettingValues() const
{
 int jobs = mUI.mJobs->text().toInt();
 if (jobs <= 0) {
 jobs = 1;
 }

 QSettings settings;
 settings.setValue(SETTINGS_CHECK_THREADS, jobs);
 saveCheckboxValue(&settings, mUI.mForce, SETTINGS_CHECK_FORCE);
 saveCheckboxValue(&settings, mUI.mSaveAllErrors, SETTINGS_SAVE_ALL_ERRORS);
 saveCheckboxValue(&settings, mUI.mSaveFullPath, SETTINGS_SAVE_FULL_PATH);
 saveCheckboxValue(&settings, mUI.mShowFullPath, SETTINGS_SHOW_FULL_PATH);
 saveCheckboxValue(&settings, mUI.mShowNoErrorsMessage, SETTINGS_SHOW_NO_ERRORS);
 saveCheckboxValue(&settings, mUI.mShowDebugWarnings, SETTINGS_SHOW_DEBUG_WARNINGS);
 saveCheckboxValue(&settings, mUI.mInlineSuppressions, SETTINGS_INLINE_SUPPRESSIONS);
 saveCheckboxValue(&settings, mUI.mEnableInconclusive, SETTINGS_INCONCLUSIVE_ERRORS);
 saveCheckboxValue(&settings, mUI.mShowStatistics, SETTINGS_SHOW_STATISTICS);
 saveCheckboxValue(&settings, mUI.mShowErrorId, SETTINGS_SHOW_ERROR_ID);
 settings.setValue(SETTINGS_PYTHON_PATH, mUI.mEditPythonPath->text());
 settings.setValue(SETTINGS_MISRA_FILE, mUI.mEditMisraFile->text());

#ifdef Q_OS_WIN
 settings.setValue(SETTINGS_CLANG_PATH, mUI.mEditClangPath->text());
 settings.setValue(SETTINGS_VS_INCLUDE_PATHS, mUI.mEditVsIncludePaths->text());
#endif

 const QListWidgetItem *currentLang = mUI.mListLanguages->currentItem();
 if (currentLang) {
 const QString langcode = currentLang->data(mLangCodeRole).toString();
 settings.setValue(SETTINGS_LANGUAGE, langcode);
 }
 CodeEditorStyle::saveSettings(&settings, *mCurrentStyle);
}

void SettingsDialog::saveCheckboxValue(QSettings *settings, QCheckBox *box,
 const QString &name)
{
 settings->setValue(name, checkStateToBool(box->checkState()));
}

void SettingsDialog::addApplication()
{
 Application app;
 ApplicationDialog dialog(tr("Add a new application"), app, this);

 if (dialog.exec() == QDialog::Accepted) {
 mTempApplications->addApplication(app);
 mUI.mListWidget->addItem(app.getName());
 }
}

void SettingsDialog::removeApplication()
{
 QList<QListWidgetItem *> selected = mUI.mListWidget->selectedItems();
 foreach (QListWidgetItem *item, selected) {
 const int removeIndex = mUI.mListWidget->row(item);
 const int currentDefault = mTempApplications->getDefaultApplication();
 mTempApplications->removeApplication(removeIndex);
 if (removeIndex == currentDefault)
 // If default app is removed set default to unknown
 mTempApplications->setDefault(-1);
 else if (removeIndex < currentDefault)
 // Move default app one up if earlier app was removed
 mTempApplications->setDefault(currentDefault - 1);
 }
 mUI.mListWidget->clear();
 populateApplicationList();
}

void SettingsDialog::editApplication()
{
 QList<QListWidgetItem *> selected = mUI.mListWidget->selectedItems();
 QListWidgetItem *item = nullptr;
 foreach (item, selected) {
 int row = mUI.mListWidget->row(item);
 Application& app = mTempApplications->getApplication(row);
 ApplicationDialog dialog(tr("Modify an application"), app, this);

 if (dialog.exec() == QDialog::Accepted) {
 QString name = app.getName();
 if (mTempApplications->getDefaultApplication() == row)
 name += tr(" [Default]");
 item->setText(name);
 }
 }
}

void SettingsDialog::defaultApplication()
{
 QList<QListWidgetItem *> selected = mUI.mListWidget->selectedItems();
 if (!selected.isEmpty()) {
 int index = mUI.mListWidget->row(selected[0]);
 mTempApplications->setDefault(index);
 mUI.mListWidget->clear();
 populateApplicationList();
 }
}

void SettingsDialog::populateApplicationList()
{
 const int defapp = mTempApplications->getDefaultApplication();
 for (int i = 0; i < mTempApplications->getApplicationCount(); i++) {
 const Application& app = mTempApplications->getApplication(i);
 QString name = app.getName();
 if (i == defapp) {
 name += " ";
 name += tr("[Default]");
 }
 mUI.mListWidget->addItem(name);
 }

 // Select default application, or if there is no default app then the
 // first item.
 if (defapp == -1)
 mUI.mListWidget->setCurrentRow(0);
 else {
 if (mTempApplications->getApplicationCount() > defapp)
 mUI.mListWidget->setCurrentRow(defapp);
 else
 mUI.mListWidget->setCurrentRow(0);
 }
}

void SettingsDialog::ok()
{
 mApplications->copy(mTempApplications);
 accept();
}

bool SettingsDialog::showFullPath() const
{
 return checkStateToBool(mUI.mShowFullPath->checkState());
}

bool SettingsDialog::saveFullPath() const
{
 return checkStateToBool(mUI.mSaveFullPath->checkState());
}

bool SettingsDialog::saveAllErrors() const
{
 return checkStateToBool(mUI.mSaveAllErrors->checkState());
}

bool SettingsDialog::showNoErrorsMessage() const
{
 return checkStateToBool(mUI.mShowNoErrorsMessage->checkState());
}

bool SettingsDialog::showErrorId() const
{
 return checkStateToBool(mUI.mShowErrorId->checkState());
}

bool SettingsDialog::showInconclusive() const
{
 return checkStateToBool(mUI.mEnableInconclusive->checkState());
}

void SettingsDialog::browsePythonPath()
{
 QString fileName = QFileDialog::getOpenFileName(this, tr("Select python binary"), QDir::rootPath());
 if (fileName.contains("python", Qt::CaseInsensitive))
 mUI.mEditPythonPath->setText(fileName);
}

void SettingsDialog::browseMisraFile()
{
 const QString fileName = QFileDialog::getOpenFileName(this, tr("Select MISRA File"), QDir::homePath(), "Misra File (*.pdf *.txt)");
 if (!fileName.isEmpty())
 mUI.mEditMisraFile->setText(fileName);
}

// Slot to set default light style
void SettingsDialog::setCodeEditorStyleDefault()
{
 if (mUI.mThemeSystem->isChecked())
 *mCurrentStyle = CodeEditorStyle::getSystemTheme();
 if (mUI.mThemeLight->isChecked())
 *mCurrentStyle = defaultStyleLight;
 if (mUI.mThemeDark->isChecked())
 *mCurrentStyle = defaultStyleDark;
 manageStyleControls();
}

// Slot to edit custom style
void SettingsDialog::editCodeEditorStyle()
{
 StyleEditDialog dlg(*mCurrentStyle, this);
 int nResult = dlg.exec();
 if (nResult == QDialog::Accepted) {
 *mCurrentStyle = dlg.getStyle();
 manageStyleControls();
 }
}

void SettingsDialog::browseClangPath()
{
 QString selectedDir = QFileDialog::getExistingDirectory(this,
 tr("Select clang path"),
 QDir::rootPath());

 if (!selectedDir.isEmpty()) {
 mUI.mEditClangPath->setText(selectedDir);
 }
}

void SettingsDialog::manageStyleControls()
{
 bool isSystemTheme = mCurrentStyle->isSystemTheme();
 bool isDefaultLight = !isSystemTheme && *mCurrentStyle == defaultStyleLight;
 bool isDefaultDark = !isSystemTheme && *mCurrentStyle == defaultStyleDark;
 mUI.mThemeSystem->setChecked(isSystemTheme);
 mUI.mThemeLight->setChecked(isDefaultLight && !isDefaultDark);
 mUI.mThemeDark->setChecked(!isDefaultLight && isDefaultDark);
 mUI.mThemeCustom->setChecked(!isSystemTheme && !isDefaultLight && !isDefaultDark);
 mUI.mBtnEditTheme->setEnabled(!isSystemTheme && !isDefaultLight && !isDefaultDark);
}