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** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
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** GNU General Public License Usage
**
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** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
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#include "settingspage.h"

#include "quickopenplugin.h"
#include "iquickopenfilter.h"
#include "directoryfilter.h"

#include <qtconcurrent/QtConcurrentTools>
#include <utils/qtcassert.h>

Q_DECLARE_METATYPE(QuickOpen::IQuickOpenFilter*)

using namespace QuickOpen;
using namespace QuickOpen::Internal;

SettingsPage::SettingsPage(Core::ICore *core, QuickOpenPlugin *plugin)
    : m_core(core), m_plugin(plugin), m_page(0)
{
}

QWidget *SettingsPage::createPage(QWidget *parent)
{
    if (!m_page) {
        m_page = new QWidget(parent);
        m_ui.setupUi(m_page);
        connect(m_ui.filterList, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
                this, SLOT(updateButtonStates()));
        connect(m_ui.filterList, SIGNAL(itemActivated(QListWidgetItem *)),
                this, SLOT(configureFilter(QListWidgetItem *)));
        connect(m_ui.editButton, SIGNAL(clicked()),
                this, SLOT(configureFilter()));
        connect(m_ui.addButton, SIGNAL(clicked()),
                this, SLOT(addCustomFilter()));
        connect(m_ui.removeButton, SIGNAL(clicked()),
                this, SLOT(removeCustomFilter()));
    }
    m_ui.refreshInterval->setValue(m_plugin->refreshInterval());
    m_filters = m_plugin->filters();
    m_customFilters = m_plugin->customFilters();
    saveFilterStates();
    updateFilterList();
    return m_page;
}

void SettingsPage::apply()
{
    // Delete removed filters and clear added filters
    qDeleteAll(m_removedFilters);
    m_removedFilters.clear();
    m_addedFilters.clear();

    // Pass the new configuration on to the plugin
    m_plugin->setFilters(m_filters);
    m_plugin->setCustomFilters(m_customFilters);
    m_plugin->setRefreshInterval(m_ui.refreshInterval->value());
    requestRefresh();
    m_plugin->saveSettings();
    saveFilterStates();
}

void SettingsPage::finish()
{
    // If settings were applied, this shouldn't change anything. Otherwise it
    // makes sure the filter states aren't changed permanently.
    restoreFilterStates();

    // Delete added filters and clear removed filters
    qDeleteAll(m_addedFilters);
    m_addedFilters.clear();
    m_removedFilters.clear();

    // Further cleanup
    m_filters.clear();
    m_customFilters.clear();
    m_refreshFilters.clear();
}

void SettingsPage::requestRefresh()
{
    if (!m_refreshFilters.isEmpty())
        m_plugin->refresh(m_refreshFilters);
}

void SettingsPage::saveFilterStates()
{
    m_filterStates.clear();
    foreach (IQuickOpenFilter *filter, m_filters)
        m_filterStates.insert(filter, filter->saveState());
}

void SettingsPage::restoreFilterStates()
{
    foreach (IQuickOpenFilter *filter, m_filterStates.keys())
        filter->restoreState(m_filterStates.value(filter));
}

void SettingsPage::updateFilterList()
{
    m_ui.filterList->clear();
    foreach (IQuickOpenFilter *filter, m_filters) {
        if (filter->isHidden())
            continue;

        QString title;
        if (filter->isIncludedByDefault())
            title = filter->trName();
        else
            title = tr("%1 (Prefix: %2)").arg(filter->trName()).arg(filter->shortcutString());
        QListWidgetItem *item = new QListWidgetItem(title);
        item->setData(Qt::UserRole, qVariantFromValue(filter));
        m_ui.filterList->addItem(item);
    }
    if (m_ui.filterList->count() > 0)
        m_ui.filterList->setCurrentRow(0);
}

void SettingsPage::updateButtonStates()
{
    QListWidgetItem *item = m_ui.filterList->currentItem();
    IQuickOpenFilter *filter = (item ? item->data(Qt::UserRole).value<IQuickOpenFilter *>() : 0);
    m_ui.editButton->setEnabled(filter && filter->isConfigurable());
    m_ui.removeButton->setEnabled(filter && m_customFilters.contains(filter));
}

void SettingsPage::configureFilter(QListWidgetItem *item)
{
    if (!item)
        item = m_ui.filterList->currentItem();
    QTC_ASSERT(item, return);
    IQuickOpenFilter *filter = item->data(Qt::UserRole).value<IQuickOpenFilter *>();
    QTC_ASSERT(filter, return);

    if (!filter->isConfigurable())
        return;
    bool needsRefresh = false;
    filter->openConfigDialog(m_page, needsRefresh);
    if (needsRefresh && !m_refreshFilters.contains(filter))
        m_refreshFilters.append(filter);
    updateFilterList();
}

void SettingsPage::addCustomFilter()
{
    IQuickOpenFilter *filter = new DirectoryFilter(m_core);
    bool needsRefresh = false;
    if (filter->openConfigDialog(m_page, needsRefresh)) {
        m_filters.append(filter);
        m_addedFilters.append(filter);
        m_customFilters.append(filter);
        m_refreshFilters.append(filter);
        updateFilterList();
    }
}

void SettingsPage::removeCustomFilter()
{
    QListWidgetItem *item = m_ui.filterList->currentItem();
    QTC_ASSERT(item, return);
    IQuickOpenFilter *filter = item->data(Qt::UserRole).value<IQuickOpenFilter *>();
    QTC_ASSERT(m_customFilters.contains(filter), return);
    m_filters.removeAll(filter);
    m_customFilters.removeAll(filter);
    m_refreshFilters.removeAll(filter);
    if (m_addedFilters.contains(filter)) {
        m_addedFilters.removeAll(filter);
        delete filter;
    } else {
        m_removedFilters.append(filter);
    }
    updateFilterList();
}