<?php
App::uses('AppController', 'Controller');
/**
 * Events Controller
 *
 * @property Event $Event
 */
class EventsController extends AppController {

/**
 * Components
 *
 * @var array
 */
	public $components = array('RequestHandler', 'Scaler', 'Image', 'Paginator');

  public function beforeFilter() {
    parent::beforeFilter();
    $canView = $this->Session->Read('eventPermission');
    if ($canView =='None') {
      throw new UnauthorizedException(__('Insufficient Privileges'));
      return;
    }
  }

/**
 * index method
 *
 * @return void
 * This also creates a thumbnail for each event.
 */
	public function index() {
		$this->Event->recursive = -1;
		
    $allowedMonitors=preg_split ('@,@', $this->Session->Read('allowedMonitors'),NULL, PREG_SPLIT_NO_EMPTY);

    if (!empty($allowedMonitors)) {
      $mon_options = array('Event.MonitorId' => $allowedMonitors);
    } else {
      $mon_options='';
    }

		if ($this->request->params['named']) {	
			//$this->FilterComponent = $this->Components->load('Filter');
			//$conditions = $this->FilterComponent->buildFilter($this->request->params['named']);
      $conditions = $this->request->params['named'];
		} else {
			$conditions = array();
		}
    $settings = array(
			// https://github.com/ZoneMinder/ZoneMinder/issues/995
			// 'limit' => $limit['ZM_WEB_EVENTS_PER_PAGE'],
			//  25 events per page which is what the above
			// default is, is way too low for an API
			// changing this to 100 so we don't kill ZM
			// with many event APIs. In future, we can
			// make a nice ZM_API_ITEMS_PER_PAGE for all pagination
			// API
		
			'limit' => '100',
			'order' => array('StartTime'),
			'paramType' => 'querystring',
    );
    if ( isset( $conditions['GroupId'] ) ) {
      $settings['joins'] = array(
        array(
          'table' => 'Groups_Monitors',
          'type' => 'inner',
          'conditions' => array(
            'Groups_Monitors.MonitorId = Event.MonitorId'
          ),
        ),
      );
      $settings['contain'] = array('Group');
    }
    $settings['conditions'] = array($conditions, $mon_options);

		// How many events to return 
		$this->loadModel('Config');
		$limit = $this->Config->find('list', array(
			'conditions' => array('Name' => 'ZM_WEB_EVENTS_PER_PAGE'),
			'fields' => array('Name', 'Value')
		));
		$this->Paginator->settings = $settings;
		$events = $this->Paginator->paginate('Event');

		// For each event, get the frameID which has the largest score
		foreach ($events as $key => $value) {
			$maxScoreFrameId = $this->getMaxScoreAlarmFrameId($value['Event']['Id']);
			$events[$key]['Event']['MaxScoreFrameId'] = $maxScoreFrameId;
		}

		$this->set(compact('events'));
	}

/**
 * view method
 *
 * @throws NotFoundException
 * @param string $id
 * @return void
 */
	public function view($id = null) {
    $this->loadModel('Config');

    $this->Event->recursive = 1;
    if (!$this->Event->exists($id)) {
      throw new NotFoundException(__('Invalid event'));
    }

    $allowedMonitors=preg_split ('@,@', $this->Session->Read('allowedMonitors'),NULL, PREG_SPLIT_NO_EMPTY);

    if (!empty($allowedMonitors)) {
      $mon_options = array('Event.MonitorId' => $allowedMonitors);
    } else {
      $mon_options='';
    }

    $options = array('conditions' => array(array('Event.' . $this->Event->primaryKey => $id), $mon_options));
    $event = $this->Event->find('first', $options);

    # Get the previous and next events for any monitor
    $this->Event->id = $id;
    $event_neighbors = $this->Event->find('neighbors');
    $event['Event']['Next'] = $event_neighbors['next']['Event']['Id'];
    $event['Event']['Prev'] = $event_neighbors['prev']['Event']['Id'];

    # Also get the previous and next events for the same monitor
    $event_monitor_neighbors = $this->Event->find('neighbors', array(
      'conditions'=>array('Event.MonitorId'=>$event['Event']['MonitorId'])
    ));
    $event['Event']['NextOfMonitor'] = $event_monitor_neighbors['next']['Event']['Id'];
    $event['Event']['PrevOfMonitor'] = $event_monitor_neighbors['prev']['Event']['Id'];

    $this->set(array(
      'event' => $event,
      '_serialize' => array('event')
    ));
  }


  /**
   * add method
   *
   * @return void
   */
  public function add() {

    if ($this->Session->Read('eventPermission') != 'Edit') {
      throw new UnauthorizedException(__('Insufficient privileges'));
      return;
    }

    if ($this->request->is('post')) {
      $this->Event->create();
      if ($this->Event->save($this->request->data)) {
        return $this->flash(__('The event has been saved.'), array('action' => 'index'));
      }
    }
    $monitors = $this->Event->Monitor->find('list');
    $this->set(compact('monitors'));
  }

  /**
   * edit method
   *
   * @throws NotFoundException
   * @param string $id
   * @return void
   */
  public function edit($id = null) {

    if ($this->Session->Read('eventPermission') != 'Edit') {
      throw new UnauthorizedException(__('Insufficient privileges'));
      return;
    }

    $this->Event->id = $id;

    if (!$this->Event->exists($id)) {
      throw new NotFoundException(__('Invalid event'));
    }

    if ($this->Event->save($this->request->data)) {
      $message = 'Saved';
    } else {
      $message = 'Error';
    }

    $this->set(array(
      'message' => $message,
      '_serialize' => array('message')
    ));
  }

  /**
   * delete method
   *
   * @throws NotFoundException
   * @param string $id
   * @return void
   */
  public function delete($id = null) {
    if ($this->Session->Read('eventPermission') != 'Edit') {
      throw new UnauthorizedException(__('Insufficient privileges'));
      return;
    }
    $this->Event->id = $id;
    if (!$this->Event->exists()) {
      throw new NotFoundException(__('Invalid event'));
    }
    $this->request->allowMethod('post', 'delete');
    if ($this->Event->delete()) {
      //$this->loadModel('Frame');
      //$this->Event->Frame->delete();
      return $this->flash(__('The event has been deleted.'), array('action' => 'index'));
    } else {
      return $this->flash(__('The event could not be deleted. Please, try again.'), array('action' => 'index'));
    }
  } // end public function delete

  public function search() {
    $this->Event->recursive = -1;
    $conditions = array();

    foreach ($this->params['named'] as $param_name => $value) {
      // Transform params into mysql
      if (preg_match("/interval/i", $value, $matches)) {
        $condition = array("$param_name >= (date_sub(now(), $value))");
      } else {
        $condition = array($param_name => $value);
      }
      array_push($conditions, $condition);
    }

    $results = $this->Event->find('all', array(
      'conditions' => $conditions
    ));

    $this->set(array(
      'results' => $results,
      '_serialize' => array('results')
    ));
  } // end public function search

  // format expected:
  // you can changed AlarmFrames to any other named params
  // consoleEvents/1 hour/AlarmFrames >=: 1/AlarmFrames <=: 20.json

  public function consoleEvents($interval = null) {
    $this->Event->recursive = -1;
    $results = array();

    $moreconditions ="";
    foreach ($this->request->params['named'] as $name => $param) {
      $moreconditions = $moreconditions . " AND ".$name.$param;
    }	

    $query = $this->Event->query("select MonitorId, COUNT(*) AS Count from Events WHERE (StartTime >= (DATE_SUB(NOW(), interval $interval)) $moreconditions) GROUP BY MonitorId;");

    foreach ($query as $result) {
      $results[$result['Events']['MonitorId']] = $result[0]['Count'];
    }

    $this->set(array(
      'results' => $results,
      '_serialize' => array('results')
    ));
  }

  // Create a thumbnail and return the thumbnail's data for a given event id.
  public function createThumbnail($id = null) {
    $this->Event->recursive = -1;

    if (!$this->Event->exists($id)) {
      throw new NotFoundException(__('Invalid event'));
    }

    $event = $this->Event->find('first', array(
      'conditions' => array('Id' => $id)
    ));

    // Find the max Frame for this Event.  Error out otherwise.
    $this->loadModel('Frame');
    if (! $frame = $this->Frame->find('first', array(
      'conditions' => array(
        'EventId' => $event['Event']['Id'],
        'Score' => $event['Event']['MaxScore']
      )
    ))) {
    throw new NotFoundException(__("Can not find Frame for Event " . $event['Event']['Id']));
    }

    $this->loadModel('Config');

    // Get the config options required for reScale and getImageSrc
    // The $bw, $thumbs and unset() code is a workaround / temporary
    // until I have a better way of handing per-bandwidth config options
    $bw = (isset($_COOKIE['zmBandwidth']) ? strtoupper(substr($_COOKIE['zmBandwidth'], 0, 1)) : 'L');
    $thumbs = "ZM_WEB_${bw}_SCALE_THUMBS";

    $config = $this->Config->find('list', array(
      'conditions' => array('OR' => array(
        'Name' => array('ZM_WEB_LIST_THUMB_WIDTH',
        'ZM_WEB_LIST_THUMB_HEIGHT',
        'ZM_EVENT_IMAGE_DIGITS',
        'ZM_DIR_IMAGES',
        $thumbs,
        'ZM_DIR_EVENTS'
      )
    )),
      'fields' => array('Name', 'Value')
    ));
    $config['ZM_WEB_SCALE_THUMBS'] = $config[$thumbs];
    unset($config[$thumbs]);

    // reScale based on either the width, or the hight, of the event.
    if ( $config['ZM_WEB_LIST_THUMB_WIDTH'] ) {
      $thumbWidth = $config['ZM_WEB_LIST_THUMB_WIDTH'];
      $scale = (100 * $thumbWidth) / $event['Event']['Width'];
      $thumbHeight = $this->Scaler->reScale( $event['Event']['Height'], $scale );
    } elseif ( $config['ZM_WEB_LIST_THUMB_HEIGHT'] ) {
      $thumbHeight = $config['ZM_WEB_LIST_THUMB_HEIGHT'];
      $scale = (100*$thumbHeight)/$event['Event']['Height'];
      $thumbWidth = $this->Scaler->reScale( $event['Event']['Width'], $scale );
    } else {
      throw new NotFoundException(__('No thumbnail width or height specified, please check in Options->Web'));
    }

    $imageData = $this->Image->getImageSrc( $event, $frame, $scale, $config );
    $thumbData['Path'] = $imageData['thumbPath'];
    $thumbData['Width'] = (int)$thumbWidth;
    $thumbData['Height'] = (int)$thumbHeight;

    return( $thumbData );
  }

  public function archive($id = null) {
    $this->Event->recursive = -1;
    if (!$this->Event->exists($id)) {
      throw new NotFoundException(__('Invalid event'));
    }

    // Get the current value of Archive
    $archived = $this->Event->find('first', array(
      'fields' => array('Event.Archived'),
      'conditions' => array('Event.Id' => $id)
    ));
    // If 0, 1, if 1, 0
    $archiveVal = (($archived['Event']['Archived'] == 0) ? 1 : 0);

    // Save the new value 
    $this->Event->id = $id;
    $this->Event->saveField('Archived', $archiveVal);

    $this->set(array(
      'archived' => $archiveVal,
      '_serialize' => array('archived')
    ));
  }

  public function getMaxScoreAlarmFrameId($id = null) {
    $this->Event->recursive = -1;

    if (!$this->Event->exists($id)) {
      throw new NotFoundException(__('Invalid event'));
    }

    $event = $this->Event->find('first', array(
      'conditions' => array('Id' => $id)
    ));

    // Find the max Frame for this Event.  Error out otherwise.
    $this->loadModel('Frame');

    if (! $frame = $this->Frame->find('first', array(
      'conditions' => array(
        'EventId' => $event['Event']['Id'],
        'Score' => $event['Event']['MaxScore']
      )
    ))) {
      throw new NotFoundException(__("Can not find Frame for Event " . $event['Event']['Id']));
    }
    return $frame['Frame']['Id'];
  }
} // end class EventsController