<?php

final class PhabricatorCalendarEventSearchEngine
  extends PhabricatorApplicationSearchEngine {

  public function getResultTypeDescription() {
    return pht('Calendar Events');
  }

  public function getApplicationClassName() {
    return 'PhabricatorCalendarApplication';
  }

  public function buildSavedQueryFromRequest(AphrontRequest $request) {
    $saved = new PhabricatorSavedQuery();

    $saved->setParameter(
      'rangeStart',
      $this->readDateFromRequest($request, 'rangeStart'));

    $saved->setParameter(
      'rangeEnd',
      $this->readDateFromRequest($request, 'rangeEnd'));

    $saved->setParameter(
      'upcoming',
      $this->readBoolFromRequest($request, 'upcoming'));

    $saved->setParameter(
      'invitedPHIDs',
      $this->readUsersFromRequest($request, 'invited'));

    $saved->setParameter(
      'creatorPHIDs',
      $this->readUsersFromRequest($request, 'creators'));

    $saved->setParameter(
      'isCancelled',
      $request->getStr('isCancelled'));

    return $saved;
  }

  public function buildQueryFromSavedQuery(PhabricatorSavedQuery $saved) {
    $query = id(new PhabricatorCalendarEventQuery());

    $min_range = null;
    $max_range = null;

    if ($saved->getParameter('rangeStart')) {
      $min_range = $saved->getParameter('rangeStart');
    }

    if ($saved->getParameter('rangeEnd')) {
      $max_range = $saved->getParameter('rangeEnd');
    }

    if ($saved->getParameter('upcoming')) {
      if ($min_range) {
        $min_range = max(time(), $min_range);
      } else {
        $min_range = time();
      }
    }

    if ($min_range || $max_range) {
      $query->withDateRange($min_range, $max_range);
    }

    $invited_phids = $saved->getParameter('invitedPHIDs');
    if ($invited_phids) {
      $query->withInvitedPHIDs($invited_phids);
    }

    $creator_phids = $saved->getParameter('creatorPHIDs');
    if ($creator_phids) {
      $query->withCreatorPHIDs($creator_phids);
    }

    $is_cancelled = $saved->getParameter('isCancelled');
    switch ($is_cancelled) {
      case 'active':
        $query->withIsCancelled(false);
        break;
      case 'cancelled':
        $query->withIsCancelled(true);
        break;
    }

    return $query;
  }

  public function buildSearchForm(
    AphrontFormView $form,
    PhabricatorSavedQuery $saved) {

    $range_start = $saved->getParameter('rangeStart');
    $range_end = $saved->getParameter('rangeEnd');
    $upcoming = $saved->getParameter('upcoming');
    $is_cancelled = $saved->getParameter('isCancelled', 'active');

    $invited_phids = $saved->getParameter('invitedPHIDs', array());
    $creator_phids = $saved->getParameter('creatorPHIDs', array());
    $resolution_types = array(
      'active' => pht('Active Events Only'),
      'cancelled' => pht('Cancelled Events Only'),
      'both' => pht('Both Cancelled and Active Events'),
    );

    $form
      ->appendControl(
        id(new AphrontFormTokenizerControl())
          ->setDatasource(new PhabricatorPeopleDatasource())
          ->setName('creators')
          ->setLabel(pht('Created By'))
          ->setValue($creator_phids))
      ->appendControl(
        id(new AphrontFormTokenizerControl())
          ->setDatasource(new PhabricatorPeopleDatasource())
          ->setName('invited')
          ->setLabel(pht('Invited'))
          ->setValue($invited_phids))
      ->appendChild(
        id(new AphrontFormDateControl())
          ->setLabel(pht('Occurs After'))
          ->setUser($this->requireViewer())
          ->setName('rangeStart')
          ->setAllowNull(true)
          ->setValue($range_start))
      ->appendChild(
        id(new AphrontFormDateControl())
          ->setLabel(pht('Occurs Before'))
          ->setUser($this->requireViewer())
          ->setName('rangeEnd')
          ->setAllowNull(true)
          ->setValue($range_end))
      ->appendChild(
        id(new AphrontFormCheckboxControl())
          ->addCheckbox(
            'upcoming',
            1,
            pht('Show only upcoming events.'),
            $upcoming))
      ->appendChild(
        id(new AphrontFormSelectControl())
          ->setLabel(pht('Cancelled Events'))
          ->setName('isCancelled')
          ->setValue($is_cancelled)
          ->setOptions($resolution_types));
  }

  protected function getURI($path) {
    return '/calendar/event/'.$path;
  }

  protected function getBuiltinQueryNames() {
    $names = array(
      'upcoming' => pht('Upcoming Events'),
      'all'      => pht('All Events'),
    );

    return $names;
  }

  public function buildSavedQueryFromBuiltin($query_key) {
    $query = $this->newSavedQuery();
    $query->setQueryKey($query_key);

    switch ($query_key) {
      case 'upcoming':
        return $query->setParameter('upcoming', true);
      case 'all':
        return $query;
    }

    return parent::buildSavedQueryFromBuiltin($query_key);
  }

  protected function getRequiredHandlePHIDsForResultList(
    array $objects,
    PhabricatorSavedQuery $query) {
    $phids = array();
    foreach ($objects as $event) {
      $phids[$event->getUserPHID()] = 1;
    }
    return array_keys($phids);
  }

  protected function renderResultList(
    array $events,
    PhabricatorSavedQuery $query,
    array $handles) {
    assert_instances_of($events, 'PhabricatorCalendarEvent');
    $viewer = $this->requireViewer();
    $list = new PHUIObjectItemListView();
    foreach ($events as $event) {
      $href = '/E'.$event->getID();
      $from = phabricator_datetime($event->getDateFrom(), $viewer);
      $to   = phabricator_datetime($event->getDateTo(), $viewer);
      $creator_handle = $handles[$event->getUserPHID()];

      $name = (strlen($event->getName())) ?
        $event->getName() : $event->getTerseSummary($viewer);

      $color = ($event->getStatus() == PhabricatorCalendarEvent::STATUS_AWAY)
        ? 'red'
        : 'yellow';

      $item = id(new PHUIObjectItemView())
        ->setHeader($name)
        ->setHref($href)
        ->setBarColor($color)
        ->addByline(pht('Creator: %s', $creator_handle->renderLink()))
        ->addAttribute(pht('From %s to %s', $from, $to))
        ->addAttribute(id(new PhutilUTF8StringTruncator())
          ->setMaximumGlyphs(64)
          ->truncateString($event->getDescription()));

      $list->addItem($item);
    }

    return $list;
  }

}