<?php

final class PhabricatorCalendarEventEditController
  extends PhabricatorCalendarController {

  private $id;

  public function willProcessRequest(array $data) {
    $this->id = idx($data, 'id');
  }

  public function isCreate() {
    return !$this->id;
  }

  public function processRequest() {
    $request  = $this->getRequest();
    $user     = $request->getUser();

    $start_time = id(new AphrontFormDateControl())
      ->setUser($user)
      ->setName('start')
      ->setLabel(pht('Start'))
      ->setInitialTime(AphrontFormDateControl::TIME_START_OF_DAY);

    $end_time = id(new AphrontFormDateControl())
      ->setUser($user)
      ->setName('end')
      ->setLabel(pht('End'))
      ->setInitialTime(AphrontFormDateControl::TIME_END_OF_DAY);

    if ($this->isCreate()) {
      $status = PhabricatorCalendarEvent::initializeNewCalendarEvent($user);
      $end_value = $end_time->readValueFromRequest($request);
      $start_value = $start_time->readValueFromRequest($request);
      $submit_label = pht('Create');
      $filter = 'status/create/';
      $page_title = pht('Create Event');
      $redirect = 'created';
    } else {
      $status = id(new PhabricatorCalendarEventQuery())
        ->setViewer($user)
        ->withIDs(array($this->id))
        ->requireCapabilities(
          array(
            PhabricatorPolicyCapability::CAN_VIEW,
            PhabricatorPolicyCapability::CAN_EDIT,
          ))
        ->executeOne();
      if (!$status) {
        return new Aphront404Response();
      }

      $end_time->setValue($status->getDateTo());
      $start_time->setValue($status->getDateFrom());
      $submit_label = pht('Update');
      $filter       = 'event/edit/'.$status->getID().'/';
      $page_title   = pht('Update Event');
      $redirect     = 'updated';
    }

    $errors = array();
    if ($request->isFormPost()) {
      $xactions    = array();
      $type        = $request->getInt('status');
      $start_value = $start_time->readValueFromRequest($request);
      $end_value   = $end_time->readValueFromRequest($request);
      $description = $request->getStr('description');

      if ($start_time->getError()) {
        $errors[] = pht('Invalid start time; reset to default.');
      }
      if ($end_time->getError()) {
        $errors[] = pht('Invalid end time; reset to default.');
      }
      if (!$errors) {
        $xactions[] = id(new PhabricatorCalendarEventTransaction())
          ->setTransactionType(
            PhabricatorCalendarEventTransaction::TYPE_START_DATE)
          ->setNewValue($start_value);

        $xactions[] = id(new PhabricatorCalendarEventTransaction())
          ->setTransactionType(
            PhabricatorCalendarEventTransaction::TYPE_END_DATE)
          ->setNewValue($end_value);

        $xactions[] = id(new PhabricatorCalendarEventTransaction())
          ->setTransactionType(
            PhabricatorCalendarEventTransaction::TYPE_STATUS)
          ->setNewValue($type);

        $xactions[] = id(new PhabricatorCalendarEventTransaction())
          ->setTransactionType(
            PhabricatorCalendarEventTransaction::TYPE_DESCRIPTION)
          ->setNewValue($description);

        $editor = id(new PhabricatorCalendarEventEditor())
          ->setActor($user)
          ->setContentSourceFromRequest($request)
          ->setContinueOnNoEffect(true);

        $xactions = $editor->applyTransactions($status, $xactions);
        return id(new AphrontRedirectResponse())->setURI('/E'.$status->getID());
      }
    }

    $error_view = null;
    if ($errors) {
      $error_view = id(new PHUIInfoView())
        ->setTitle(pht('Status can not be set!'))
        ->setErrors($errors);
    }

    $status_select = id(new AphrontFormSelectControl())
      ->setLabel(pht('Status'))
      ->setName('status')
      ->setValue($status->getStatus())
      ->setOptions($status->getStatusOptions());

    $description = id(new AphrontFormTextAreaControl())
      ->setLabel(pht('Description'))
      ->setName('description')
      ->setValue($status->getDescription());

    if ($request->isAjax()) {
      $dialog = id(new AphrontDialogView())
        ->setUser($user)
        ->setTitle($page_title)
        ->setWidth(AphrontDialogView::WIDTH_FORM);
      if ($this->isCreate()) {
        $dialog->setSubmitURI($this->getApplicationURI('event/create/'));
      } else {
        $dialog->setSubmitURI(
          $this->getApplicationURI('event/edit/'.$status->getID().'/'));
      }
      $form = new PHUIFormLayoutView();
      if ($error_view) {
        $form->appendChild($error_view);
      }
    } else {
      $form = id(new AphrontFormView())
        ->setUser($user);
    }

    $form
      ->appendChild($status_select)
      ->appendChild($start_time)
      ->appendChild($end_time)
      ->appendChild($description);

    if ($request->isAjax()) {
      $dialog->addSubmitButton($submit_label);
      $submit = $dialog;
    } else {
      $submit = id(new AphrontFormSubmitControl())
        ->setValue($submit_label);
    }
    if ($this->isCreate()) {
      $submit->addCancelButton($this->getApplicationURI());
    } else {
      $submit->addCancelButton('/E'.$status->getID());
    }

    if ($request->isAjax()) {
      $dialog->appendChild($form);
      return id(new AphrontDialogResponse())
        ->setDialog($dialog);
    }
    $form->appendChild($submit);


    $form_box = id(new PHUIObjectBoxView())
      ->setHeaderText($page_title)
      ->setFormErrors($errors)
      ->setForm($form);

    $nav = $this->buildSideNavView($status);
    $nav->selectFilter($filter);

    $crumbs = $this->buildApplicationCrumbs();

    if (!$this->isCreate()) {
      $crumbs->addTextCrumb('E'.$status->getId(), '/E'.$status->getId());
    }

    $crumbs->addTextCrumb($page_title);

    $nav->appendChild(
      array(
        $crumbs,
        $form_box,
      ));

    return $this->buildApplicationPage(
      $nav,
      array(
        'title' => $page_title,
      ));
  }

}