// For license of this file, see <project-root-folder>/LICENSE.md.

#include "dynamic-shortcuts/dynamicshortcutswidget.h"

#include "definitions/definitions.h"
#include "dynamic-shortcuts/shortcutcatcher.h"

#include <QAction>
#include <QGridLayout>
#include <QLabel>

DynamicShortcutsWidget::DynamicShortcutsWidget(QWidget* parent) : QWidget(parent) {
  // Create layout for this control and set is as active.
  m_layout = new QGridLayout(this);
  m_layout->setContentsMargins({});

  setLayout(m_layout);
}

DynamicShortcutsWidget::~DynamicShortcutsWidget() {
  delete m_layout;
}

bool DynamicShortcutsWidget::areShortcutsUnique() const {
  QList<QKeySequence> all_shortcuts;

  // Obtain all shortcuts.
  for (const ActionBinding& binding : m_actionBindings) {
    const QKeySequence new_shortcut = binding.second->shortcut();

    if (!new_shortcut.isEmpty() && all_shortcuts.contains(new_shortcut)) {
      // Problem, two identical non-empty shortcuts found.
      return false;
    }
    else {
      all_shortcuts.append(binding.second->shortcut());
    }
  }

  return true;
}

void DynamicShortcutsWidget::updateShortcuts() {
  for (const ActionBinding& binding : m_actionBindings) {
    binding.first->setShortcut(binding.second->shortcut());
  }
}

void DynamicShortcutsWidget::populate(QList<QAction*> actions) {
  m_actionBindings.clear();
  std::sort(actions.begin(), actions.end(), [](QAction* lhs, QAction* rhs) {
    return QString::localeAwareCompare(lhs->text().replace(QL1S("&"), QString()), rhs->text().replace(QL1S("&"), QString())) < 0;
  });
  int row_id = 0;

  // FIXME: Maybe separate actions into "categories". Each category will start with label.
  // I will assign each QAaction a property called "category" with some enum value.
  // Like:
  //  File, FeedsCategories, Messages, Tools, WebBrowser, Help
  // This will be setup in FormMain::allActions().
  // Then here I will process actions into categories.

  for (QAction* action : actions) {
    // Create shortcut catcher for this action and set default shortcut.
    auto* catcher = new ShortcutCatcher(this);

    catcher->setDefaultShortcut(action->shortcut());

    // Store information for re-initialization of shortcuts
    // of actions when widget gets "confirmed".
    QPair<QAction*, ShortcutCatcher*> new_binding;

    new_binding.first = action;
    new_binding.second = catcher;
    m_actionBindings << new_binding;

    // Add new catcher to our control.
    auto* action_label = new QLabel(this);

    action_label->setText(action->text().remove(QSL("&")));
    action_label->setToolTip(action->toolTip());
    action_label->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Preferred);

    auto* action_icon = new QLabel(this);

    action_icon->setPixmap(action->icon().pixmap(ICON_SIZE_SETTINGS, ICON_SIZE_SETTINGS));
    action_icon->setToolTip(action->toolTip());
    m_layout->addWidget(action_icon, row_id, 0);
    m_layout->addWidget(action_label, row_id, 1);
    m_layout->addWidget(catcher, row_id, 2);
    row_id++;
    connect(catcher, &ShortcutCatcher::shortcutChanged, this, &DynamicShortcutsWidget::setupChanged);
  }

  // Make sure that "spacer" is added.
  m_layout->setRowStretch(row_id, 1);
  m_layout->setColumnStretch(1, 1);
}