#include "editorpage.h"

#include <QComboBox>
#include <QFormLayout>
#include <QTimer>
#include <QSpinBox>
#include <QHBoxLayout>
#include <QPushButton>
#include <QUrl>

#include <widgets/widgetsfactory.h>
#include <core/editorconfig.h>
#include <core/configmgr.h>
#include <utils/widgetutils.h>
#include <vtextedit/spellchecker.h>
#include <widgets/messageboxhelper.h>

using namespace vnotex;

EditorPage::EditorPage(QWidget *p_parent)
    : SettingsPage(p_parent)
{
    setupUI();
}

void EditorPage::setupUI()
{
    auto mainLayout = WidgetsFactory::createFormLayout(this);

    {
        m_autoSavePolicyComboBox = WidgetsFactory::createComboBox(this);
        m_autoSavePolicyComboBox->setToolTip(tr("Auto save policy"));

        m_autoSavePolicyComboBox->addItem(tr("None"), (int)EditorConfig::AutoSavePolicy::None);
        m_autoSavePolicyComboBox->addItem(tr("Auto Save"), (int)EditorConfig::AutoSavePolicy::AutoSave);
        m_autoSavePolicyComboBox->addItem(tr("Backup File"), (int)EditorConfig::AutoSavePolicy::BackupFile);

        const QString label(tr("Auto save policy:"));
        mainLayout->addRow(label, m_autoSavePolicyComboBox);
        addSearchItem(label, m_autoSavePolicyComboBox->toolTip(), m_autoSavePolicyComboBox);
        connect(m_autoSavePolicyComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
                this, &EditorPage::pageIsChanged);
    }

    {
        m_lineEndingComboBox = WidgetsFactory::createComboBox(this);
        m_lineEndingComboBox->setToolTip(tr("Line ending"));

        m_lineEndingComboBox->addItem(tr("Follow Platform"), (int)LineEndingPolicy::Platform);
        m_lineEndingComboBox->addItem(tr("Follow File"), (int)LineEndingPolicy::File);
        m_lineEndingComboBox->addItem(tr("LF (Linux/macOS)"), (int)LineEndingPolicy::LF);
        m_lineEndingComboBox->addItem(tr("CR LF (Windows)"), (int)LineEndingPolicy::CRLF);
        m_lineEndingComboBox->addItem(tr("CR"), (int)LineEndingPolicy::CR);

        const QString label(tr("Line ending:"));
        mainLayout->addRow(label, m_lineEndingComboBox);
        addSearchItem(label, m_lineEndingComboBox->toolTip(), m_lineEndingComboBox);
        connect(m_lineEndingComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
                this, &EditorPage::pageIsChanged);
    }

    {
        m_toolBarIconSizeSpinBox = WidgetsFactory::createSpinBox(this);
        m_toolBarIconSizeSpinBox->setToolTip(tr("Icon size of the editor tool bar"));

        m_toolBarIconSizeSpinBox->setRange(1, 48);
        m_toolBarIconSizeSpinBox->setSingleStep(1);

        const QString label(tr("Tool bar icon size:"));
        mainLayout->addRow(label, m_toolBarIconSizeSpinBox);
        addSearchItem(label, m_toolBarIconSizeSpinBox->toolTip(), m_toolBarIconSizeSpinBox);
        connect(m_toolBarIconSizeSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
                this, &EditorPage::pageIsChanged);

    }

    {
        auto lineLayout = new QHBoxLayout();

        m_spellCheckDictComboBox = WidgetsFactory::createComboBox(this);
        m_spellCheckDictComboBox->setToolTip(tr("Default dictionary used for spell check"));
        lineLayout->addWidget(m_spellCheckDictComboBox);

        {
            auto dicts = vte::SpellChecker::getInst().availableDictionaries();
            for (auto it = dicts.constBegin(); it != dicts.constEnd(); ++it) {
                m_spellCheckDictComboBox->addItem(it.key(), it.value());
            }
        }

        auto addBtn = new QPushButton(tr("Add Dictionary"), this);
        connect(addBtn, &QPushButton::clicked,
                this, [this]() {
                    const auto dictsFolder = ConfigMgr::getInst().getUserDictsFolder();
                    MessageBoxHelper::notify(
                        MessageBoxHelper::Information,
                        tr("VNote uses [Hunspell](http://hunspell.github.io/) for spell check."),
                        tr("Please download Hunspell's dictionaries, put them under (%1) and restart VNote.").arg(dictsFolder),
                        QString(),
                        this);
                    WidgetUtils::openUrlByDesktop(QUrl::fromLocalFile(dictsFolder));
                });
        lineLayout->addWidget(addBtn);

        lineLayout->addStretch();

        const QString label(tr("Spell check dictionary:"));
        mainLayout->addRow(label, lineLayout);
        addSearchItem(label, m_spellCheckDictComboBox->toolTip(), m_spellCheckDictComboBox);
        connect(m_spellCheckDictComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
                this, &EditorPage::pageIsChanged);
    }
}

void EditorPage::loadInternal()
{
    const auto &editorConfig = ConfigMgr::getInst().getEditorConfig();

    {
        int idx = m_autoSavePolicyComboBox->findData(static_cast<int>(editorConfig.getAutoSavePolicy()));
        Q_ASSERT(idx != -1);
        m_autoSavePolicyComboBox->setCurrentIndex(idx);
    }

    {
        int idx = m_lineEndingComboBox->findData(static_cast<int>(editorConfig.getLineEndingPolicy()));
        Q_ASSERT(idx != -1);
        m_lineEndingComboBox->setCurrentIndex(idx);
    }

    m_toolBarIconSizeSpinBox->setValue(editorConfig.getToolBarIconSize());

    {
        int idx = m_spellCheckDictComboBox->findData(editorConfig.getSpellCheckDefaultDictionary());
        m_spellCheckDictComboBox->setCurrentIndex(idx == -1 ? 0 : idx);
    }
}

bool EditorPage::saveInternal()
{
    auto &editorConfig = ConfigMgr::getInst().getEditorConfig();

    {
        auto policy = m_autoSavePolicyComboBox->currentData().toInt();
        editorConfig.setAutoSavePolicy(static_cast<EditorConfig::AutoSavePolicy>(policy));
    }

    {
        auto ending = m_lineEndingComboBox->currentData().toInt();
        editorConfig.setLineEndingPolicy(static_cast<LineEndingPolicy>(ending));
    }

    editorConfig.setToolBarIconSize(m_toolBarIconSizeSpinBox->value());

    {
        editorConfig.setSpellCheckDefaultDictionary(m_spellCheckDictComboBox->currentData().toString());
    }

    notifyEditorConfigChange();

    return true;
}

QString EditorPage::title() const
{
    return tr("Editor");
}

void EditorPage::notifyEditorConfigChange()
{
    static QTimer *timer = nullptr;
    if (!timer) {
        timer = new QTimer();
        timer->setSingleShot(true);
        timer->setInterval(1000);
        auto& configMgr = ConfigMgr::getInst();
        connect(timer, &QTimer::timeout,
                &configMgr, &ConfigMgr::editorConfigChanged);
    }

    timer->start();
}