/*
  Copyright (c) 2013-2020 Laurent Montel <montel@kde.org>

  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License, version 2, as
  published by the Free Software Foundation.

  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, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "configureaccountpage.h"
#include "dialog/kmknotify.h"
#include "newmailnotifierinterface.h"
#include "kmkernel.h"
#include "settings/kmailsettings.h"
#include "configagentdelegate.h"
#include "undosend/undosendcombobox.h"
#include "MessageComposer/MessageComposerSettings"
#include "MailCommon/AccountConfigOrderDialog"
#include "PimCommon/ConfigureImmutableWidgetUtils"
using namespace PimCommon::ConfigureImmutableWidgetUtils;
#include <mailtransport/transportmanagementwidget.h>
using MailTransport::TransportManagementWidget;
#include "ui_accountspagereceivingtab.h"
#include "MailCommon/MailUtil"

#include <AkonadiCore/agentfilterproxymodel.h>
#include <AkonadiCore/agentinstancemodel.h>
#include <AkonadiCore/agenttype.h>
#include <AkonadiCore/agentmanager.h>
#include <AkonadiWidgets/agenttypedialog.h>
#include <AkonadiWidgets/AgentConfigurationDialog>
#include <AkonadiCore/agentinstancecreatejob.h>
#include <identity/identitypage.h>
#include <Libkdepim/LdapConfigureWidget>
#include <QComboBox>
#include <KConfigGroup>
#include <KLocalizedString>
#include <KMessageBox>
#include "kmail_debug.h"

#include <QAbstractItemView>
#include <QGridLayout>
#include <QGroupBox>
#include <QMenu>
#include <QLabel>
#include <QProcess>
#include <QVBoxLayout>

#include <memory>

QString AccountsPage::helpAnchor() const
{
    return QStringLiteral("configure-accounts");
}

AccountsPage::AccountsPage(QWidget *parent)
    : ConfigModuleWithTabs(parent)
{
    //Identity Tab:
    KMail::IdentityPage *identityTab = new KMail::IdentityPage();
    addTab(identityTab, i18nc("@title:tab Tab page where the user configures identities", "Identities"));

    //
    // "Receiving" tab:
    //
    ReceivingTab *receivingTab = new ReceivingTab();
    addTab(receivingTab, i18nc("@title:tab Tab page where the user configures accounts to receive mail", "Receiving"));
    connect(receivingTab, &ReceivingTab::accountListChanged, this, &AccountsPage::accountListChanged);

    //
    // "Sending" tab:
    //
    SendingTab *sendingTab = new SendingTab();
    addTab(sendingTab, i18nc("@title:tab Tab page where the user configures accounts to send mail", "Sending"));

    //
    // "Sending" tab:
    //
    LdapCompetionTab *ldapCompletionTab = new LdapCompetionTab();
    addTab(ldapCompletionTab, i18nc("@title:tab Tab page where the user configures ldap server", "LDAP server"));
}

AccountsPageSendingTab::~AccountsPageSendingTab()
{
}

QString AccountsPage::SendingTab::helpAnchor() const
{
    return QStringLiteral("configure-accounts-sending");
}

AccountsPageSendingTab::AccountsPageSendingTab(QWidget *parent)
    : ConfigModuleTab(parent)
{
    QVBoxLayout *vlay = new QVBoxLayout(this);
    // label: zero stretch ### FIXME more
    vlay->addWidget(new QLabel(i18n("Outgoing accounts (add at least one):"), this));

    TransportManagementWidget *tmw = new TransportManagementWidget(this);
    tmw->layout()->setContentsMargins(0, 0, 0, 0);
    vlay->addWidget(tmw);

    // "Common options" groupbox:
    QGroupBox *group = new QGroupBox(i18n("Common Options"), this);
    vlay->addWidget(group);

    // a grid layout for the contents of the "common options" group box
    QGridLayout *glay = new QGridLayout();
    group->setLayout(glay);
    glay->setColumnStretch(2, 10);

    // "confirm before send" check box:
    mConfirmSendCheck = new QCheckBox(i18n("Confirm &before send"), group);
    glay->addWidget(mConfirmSendCheck, 0, 0, 1, 2);
    connect(mConfirmSendCheck, &QCheckBox::stateChanged, this, &AccountsPageSendingTab::slotEmitChanged);

    mCheckSpellingBeforeSending = new QCheckBox(i18n("Check spelling before sending"), group);
    glay->addWidget(mCheckSpellingBeforeSending, 1, 0, 1, 2);
    connect(mCheckSpellingBeforeSending, &QCheckBox::stateChanged, this, &AccountsPageSendingTab::slotEmitChanged);

    // "send on check" combo:
    mSendOnCheckCombo = new QComboBox(group);
    mSendOnCheckCombo->setEditable(false);
    mSendOnCheckCombo->addItems(QStringList()
                                << i18n("Never Automatically")
                                << i18n("On Manual Mail Checks")
                                << i18n("On All Mail Checks"));
    glay->addWidget(mSendOnCheckCombo, 2, 1);
    connect(mSendOnCheckCombo, qOverload<int>(&QComboBox::activated), this, &AccountsPageSendingTab::slotEmitChanged);

    // "default send method" combo:
    mSendMethodCombo = new QComboBox(group);
    mSendMethodCombo->setEditable(false);
    mSendMethodCombo->addItems(QStringList()
                               << i18n("Send Now")
                               << i18n("Send Later"));
    glay->addWidget(mSendMethodCombo, 3, 1);
    connect(mSendMethodCombo, qOverload<int>(&QComboBox::activated), this, &AccountsPageSendingTab::slotEmitChanged);

    // labels:
    QLabel *l = new QLabel(i18n("Send &messages in outbox folder:"), group);
    l->setBuddy(mSendOnCheckCombo);
    glay->addWidget(l, 2, 0);

    QString msg = i18n(KMailSettings::self()->sendOnCheckItem()->whatsThis().toUtf8().constData());
    l->setWhatsThis(msg);
    mSendOnCheckCombo->setWhatsThis(msg);

    l = new QLabel(i18n("Defa&ult send method:"), group);
    l->setBuddy(mSendMethodCombo);
    glay->addWidget(l, 3, 0);

    mUndoSend = new QCheckBox(i18n("Enable Undo Send"), this);
    glay->addWidget(mUndoSend, 4, 0);
    connect(mUndoSend, &QCheckBox::toggled, this, [this](bool state) {
        mUndoSendComboBox->setEnabled(state);
        Q_EMIT slotEmitChanged();
    });

    mUndoSendComboBox = new UndoSendCombobox(this);
    mUndoSendComboBox->setEnabled(false);
    glay->addWidget(mUndoSendComboBox, 4, 1);
    connect(mUndoSendComboBox, qOverload<int>(&QComboBox::activated), this, &AccountsPageSendingTab::slotEmitChanged);
}

void AccountsPage::SendingTab::doLoadFromGlobalSettings()
{
    mSendOnCheckCombo->setCurrentIndex(KMailSettings::self()->sendOnCheck());
    loadWidget(mConfirmSendCheck, KMailSettings::self()->confirmBeforeSendItem());
    loadWidget(mCheckSpellingBeforeSending, KMailSettings::self()->checkSpellingBeforeSendItem());
    loadWidget(mUndoSend, KMailSettings::self()->enabledUndoSendItem());
    mUndoSendComboBox->setDelay(KMailSettings::self()->undoSendDelay());
}

void AccountsPage::SendingTab::doLoadOther()
{
    mSendMethodCombo->setCurrentIndex(MessageComposer::MessageComposerSettings::self()->sendImmediate() ? 0 : 1);
    loadWidget(mConfirmSendCheck, KMailSettings::self()->confirmBeforeSendItem());
    loadWidget(mCheckSpellingBeforeSending, KMailSettings::self()->checkSpellingBeforeSendItem());
    loadWidget(mUndoSend, KMailSettings::self()->enabledUndoSendItem());
    mUndoSendComboBox->setDelay(KMailSettings::self()->undoSendDelay());
}

void AccountsPage::SendingTab::save()
{
    KMailSettings::self()->setSendOnCheck(mSendOnCheckCombo->currentIndex());
    saveCheckBox(mConfirmSendCheck, KMailSettings::self()->confirmBeforeSendItem());
    saveCheckBox(mCheckSpellingBeforeSending, KMailSettings::self()->checkSpellingBeforeSendItem());
    saveCheckBox(mUndoSend, KMailSettings::self()->enabledUndoSendItem());
    MessageComposer::MessageComposerSettings::self()->setSendImmediate(mSendMethodCombo->currentIndex() == 0);
    KMailSettings::self()->setUndoSendDelay(mUndoSendComboBox->delay());
}

QString AccountsPage::ReceivingTab::helpAnchor() const
{
    return QStringLiteral("configure-accounts-receiving");
}

AccountsPageReceivingTab::AccountsPageReceivingTab(QWidget *parent)
    : ConfigModuleTab(parent)
{
    const auto service = Akonadi::ServerManager::self()->agentServiceName(Akonadi::ServerManager::Agent, QStringLiteral("akonadi_newmailnotifier_agent"));
    mNewMailNotifierInterface = new OrgFreedesktopAkonadiNewMailNotifierInterface(service,
                                                                                  QStringLiteral("/NewMailNotifierAgent"),
                                                                                  QDBusConnection::sessionBus(),
                                                                                  this);
    if (!mNewMailNotifierInterface->isValid()) {
        qCDebug(KMAIL_LOG) << " org.freedesktop.Akonadi.NewMailNotifierAgent not found. Please verify your installation";
        delete mNewMailNotifierInterface;
        mNewMailNotifierInterface = nullptr;
    }
    mAccountsReceiving.setupUi(this);

    mAccountsReceiving.mAccountsReceiving->setMimeTypeFilter(QStringList() << KMime::Message::mimeType());
    mAccountsReceiving.mAccountsReceiving->setCapabilityFilter(QStringList() << QStringLiteral("Resource"));
    mAccountsReceiving.mAccountsReceiving->setExcludeCapabilities(QStringList() << QStringLiteral("MailTransport") << QStringLiteral("Notes") << QStringLiteral("Autostart"));

    KConfig specialMailCollection(QStringLiteral("specialmailcollectionsrc"));
    if (specialMailCollection.hasGroup(QStringLiteral("SpecialCollections"))) {
        KConfigGroup grp = specialMailCollection.group(QStringLiteral("SpecialCollections"));
        mAccountsReceiving.mAccountsReceiving->setSpecialCollectionIdentifier(grp.readEntry(QStringLiteral("DefaultResourceId")));
    }
    ConfigAgentDelegate *configDelegate = new ConfigAgentDelegate(mAccountsReceiving.mAccountsReceiving->view());
    mAccountsReceiving.mAccountsReceiving->setItemDelegate(configDelegate);
    connect(configDelegate, &ConfigAgentDelegate::optionsClicked, this, &AccountsPageReceivingTab::slotShowMailCheckMenu);

    connect(mAccountsReceiving.mVerboseNotificationCheck, &QCheckBox::stateChanged, this, &ConfigModuleTab::slotEmitChanged);

    connect(mAccountsReceiving.mOtherNewMailActionsButton, &QAbstractButton::clicked, this, &AccountsPageReceivingTab::slotEditNotifications);
    connect(mAccountsReceiving.customizeAccountOrder, &QAbstractButton::clicked, this, &AccountsPageReceivingTab::slotCustomizeAccountOrder);
    mAccountsReceiving.mAccountsReceiving->disconnectAddAccountButton();
    QMenu *accountMenu = new QMenu(this);
    accountMenu->addAction(i18n("Add Mail Account..."), this, &AccountsPageReceivingTab::slotAddMailAccount);
    accountMenu->addAction(i18n("Custom Account..."), this, &AccountsPageReceivingTab::slotAddCustomAccount);
    mAccountsReceiving.mAccountsReceiving->addAccountButton()->setMenu(accountMenu);
}

AccountsPageReceivingTab::~AccountsPageReceivingTab()
{
    delete mNewMailNotifierInterface;
    mRetrievalHash.clear();
}

void AccountsPageReceivingTab::slotAddCustomAccount()
{
    mAccountsReceiving.mAccountsReceiving->slotAddAccount();
}

void AccountsPageReceivingTab::slotAddMailAccount()
{
    const QStringList lst = {QStringLiteral("--type"), QStringLiteral("message/rfc822") };

    const QString path = QStandardPaths::findExecutable(QStringLiteral("accountwizard"));
    if (!QProcess::startDetached(path, lst)) {
        KMessageBox::error(this, i18n("Could not start the account wizard. "
                                      "Please make sure you have AccountWizard properly installed."),
                           i18n("Unable to start account wizard"));
    }
}

void AccountsPageReceivingTab::slotCustomizeAccountOrder()
{
    if (KMKernel::self()) {
        QPointer<MailCommon::AccountConfigOrderDialog> dlg = new MailCommon::AccountConfigOrderDialog(KMKernel::self()->mailCommonSettings(), this);
        dlg->exec();
        delete dlg;
    }
}

void AccountsPageReceivingTab::slotShowMailCheckMenu(const QString &ident, const QPoint &pos)
{
    QMenu menu(this);

    bool IncludeInManualChecks;
    bool OfflineOnShutdown;
    bool CheckOnStartup;
    if (!mRetrievalHash.contains(ident)) {
        const QString resourceGroupPattern(QStringLiteral("Resource %1"));

        KConfigGroup group;
        KConfig *conf = nullptr;
        if (KMKernel::self()) {
            group = KConfigGroup(KMKernel::self()->config(), resourceGroupPattern.arg(ident));
        } else {
            conf = new KConfig(QStringLiteral("kmail2rc"));
            group = KConfigGroup(conf, resourceGroupPattern.arg(ident));
        }

        IncludeInManualChecks = group.readEntry("IncludeInManualChecks", true);

        // Keep sync with kmkernel, don't forget to change there.
        OfflineOnShutdown = group.readEntry("OfflineOnShutdown", ident.startsWith(QLatin1String("akonadi_pop3_resource")) ? true : false);

        CheckOnStartup = group.readEntry("CheckOnStartup", false);
        QSharedPointer<RetrievalOptions> opts(new RetrievalOptions(IncludeInManualChecks, OfflineOnShutdown, CheckOnStartup));
        mRetrievalHash.insert(ident, opts);
        delete conf;
    } else {
        QSharedPointer<RetrievalOptions> opts = mRetrievalHash.value(ident);
        IncludeInManualChecks = opts->IncludeInManualChecks;
        OfflineOnShutdown = opts->OfflineOnShutdown;
        CheckOnStartup = opts->CheckOnStartup;
    }

    if (!MailCommon::Util::isVirtualCollection(ident)) {
        QAction *manualMailCheck = new QAction(i18nc("Label to a checkbox, so is either checked/unchecked", "Include in Manual Mail Check"), &menu);
        manualMailCheck->setCheckable(true);
        manualMailCheck->setChecked(IncludeInManualChecks);
        manualMailCheck->setData(ident);
        menu.addAction(manualMailCheck);
        connect(manualMailCheck, &QAction::toggled, this, &AccountsPageReceivingTab::slotIncludeInCheckChanged);
    }

    QAction *switchOffline = new QAction(i18nc("Label to a checkbox, so is either checked/unchecked", "Switch offline on KMail Shutdown"), &menu);
    switchOffline->setCheckable(true);
    switchOffline->setChecked(OfflineOnShutdown);
    switchOffline->setData(ident);
    menu.addAction(switchOffline);
    connect(switchOffline, &QAction::toggled, this, &AccountsPageReceivingTab::slotOfflineOnShutdownChanged);

    QAction *checkOnStartup = new QAction(i18n("Check mail on startup"), &menu);
    checkOnStartup->setCheckable(true);
    checkOnStartup->setChecked(CheckOnStartup);
    checkOnStartup->setData(ident);
    menu.addAction(checkOnStartup);

    connect(checkOnStartup, &QAction::toggled, this, &AccountsPageReceivingTab::slotCheckOnStatupChanged);

    menu.exec(mAccountsReceiving.mAccountsReceiving->view()->mapToGlobal(pos));
}

void AccountsPageReceivingTab::slotCheckOnStatupChanged(bool checked)
{
    QAction *action = qobject_cast< QAction * >(sender());
    const QString ident = action->data().toString();

    QSharedPointer<RetrievalOptions> opts = mRetrievalHash.value(ident);
    opts->CheckOnStartup = checked;
    slotEmitChanged();
}

void AccountsPageReceivingTab::slotIncludeInCheckChanged(bool checked)
{
    QAction *action = qobject_cast< QAction * >(sender());
    const QString ident = action->data().toString();

    QSharedPointer<RetrievalOptions> opts = mRetrievalHash.value(ident);
    opts->IncludeInManualChecks = checked;
    slotEmitChanged();
}

void AccountsPageReceivingTab::slotOfflineOnShutdownChanged(bool checked)
{
    QAction *action = qobject_cast< QAction * >(sender());
    QString ident = action->data().toString();

    QSharedPointer<RetrievalOptions> opts = mRetrievalHash.value(ident);
    opts->OfflineOnShutdown = checked;
    slotEmitChanged();
}

void AccountsPage::ReceivingTab::slotEditNotifications()
{
    const auto instance = Akonadi::AgentManager::self()->instance(QStringLiteral("akonadi_newmailnotifier_agent"));
    if (instance.isValid()) {
        std::unique_ptr<Akonadi::AgentConfigurationDialog>(new Akonadi::AgentConfigurationDialog(instance, this))->exec();
    } else {
        KMessageBox::error(this, i18n("New Mail Notifier Agent not registered. Please contact your administrator."));
    }
}

void AccountsPage::ReceivingTab::doLoadFromGlobalSettings()
{
    if (mNewMailNotifierInterface) {
        mAccountsReceiving.mVerboseNotificationCheck->setChecked(mNewMailNotifierInterface->verboseMailNotification());
    }
}

void AccountsPage::ReceivingTab::save()
{
    // Save Mail notification settings
    if (mNewMailNotifierInterface) {
        mNewMailNotifierInterface->setVerboseMailNotification(mAccountsReceiving.mVerboseNotificationCheck->isChecked());
    }

    const QString resourceGroupPattern(QStringLiteral("Resource %1"));
    QHash<QString, QSharedPointer<RetrievalOptions> >::const_iterator it = mRetrievalHash.cbegin();
    const QHash<QString, QSharedPointer<RetrievalOptions> >::const_iterator itEnd = mRetrievalHash.cend();
    for (; it != itEnd; ++it) {
        KConfigGroup group;
        KConfig *conf = nullptr;
        if (KMKernel::self()) {
            group = KConfigGroup(KMKernel::self()->config(), resourceGroupPattern.arg(it.key()));
        } else {
            conf = new KConfig(QStringLiteral("kmail2rc"));
            group = KConfigGroup(conf, resourceGroupPattern.arg(it.key()));
        }
        QSharedPointer<RetrievalOptions> opts = it.value();
        group.writeEntry("IncludeInManualChecks", opts->IncludeInManualChecks);
        group.writeEntry("OfflineOnShutdown", opts->OfflineOnShutdown);
        group.writeEntry("CheckOnStartup", opts->CheckOnStartup);
        delete conf;
    }
}

LdapCompetionTab::LdapCompetionTab(QWidget *parent)
    : ConfigModuleTab(parent)
{
    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);

    mLdapConfigureWidget = new KLDAP::LdapConfigureWidget(this);
    layout->addWidget(mLdapConfigureWidget);

    connect(mLdapConfigureWidget, &KLDAP::LdapConfigureWidget::changed, this, qOverload<bool>(&LdapCompetionTab::changed));
}

LdapCompetionTab::~LdapCompetionTab()
{
}

QString LdapCompetionTab::helpAnchor() const
{
    return {};
}

void LdapCompetionTab::save()
{
    mLdapConfigureWidget->save();
}

void LdapCompetionTab::doLoadOther()
{
    mLdapConfigureWidget->load();
}
