<?php

namespace app\controllers;

use Yii;
use yii\web\Controller;

use yii\web\NotFoundHttpException;
use yii\web\ForbiddenHttpException;

class CameraController extends Controller
{
    public function actionStream($id, $scale = 50)
    {
		$cms = Yii::$app->params['cameras'];
		if (!isset($cms[$id]))
		{
			throw new NotFoundHttpException();
		}
		if (!is_numeric($scale)) $scale = 50;
		$zm_id = $cms[$id];
		$source_url = Yii::$app->params['zmUrl'].'/cgi-bin/nph-zms?scale='.$scale.'&mode=jpeg&maxfps=30&buffer=1000&monitor='.$zm_id.'&connkey='.rand(0, 65536);
		$fp = fopen($source_url, 'r', false);
		if ($fp)
		{
			Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
			// send mjpeg header:
			header("Cache-Control: no-cache");
			header("Cache-Control: private");
			header("Pragma: no-cache");
			header("Content-type: multipart/x-mixed-replace; boundary=ZoneMinderFrame");

			// pass data
			fpassthru($fp);
			fclose($fp);
		}
		else throw new NotFoundHttpException();
    }

	public function actionView($id)
	{
		$cms = Yii::$app->params['cameras'];
		if (!isset($cms[$id]))
		{
			throw new NotFoundHttpException();
		}
		$archive = $this->getArchive($cms[$id]);
		return $this->render('view',
			[
				'id' => $id,
				'archive' => array_reverse($archive),
			]);
	}

	private function getArchive($zm_id) : array
	{
		$client = new \app\components\ApiClient(Yii::$app->params['zmUrl'].'zm/api');
		$json = $client->getEvents($zm_id, date("Y-m-d H:i:s", time() - 7 * 24 * 3600));
		$r = json_decode($json, true);
		$result = [];
		foreach ($r['events'] as $e)
		{
			$result[] = new \app\models\zm\Event($e['Event']);
		}
		$pages_count = $r['pagination']['pageCount'];
		for ($i = 2; $i <= $pages_count; $i++)
		{
			$json = $client->getEvents($zm_id, date("Y-m-d H:i:s", time() - 7 * 24 * 3600), $i);
			$r = json_decode($json, true);
			foreach ($r['events'] as $e)
			{
				$result[] = new \app\models\zm\Event($e['Event']);
			}
		}
		return $result;
	}

	private function getZMEvent($event_id)
	{
		$client = new \app\components\ApiClient(Yii::$app->params['zmUrl'].'zm/api');
		$json = $client->getEvent($event_id);
		$r = json_decode($json, true);
		$e = new \app\models\zm\Event($r['event']['Event']);
		return $e;
	}

	private function checkCameraAccess($camera_id, $event_id)
	{
		$cms = Yii::$app->params['cameras'];
		if (!isset($cms[$camera_id]))
		{
			throw new NotFoundHttpException();
		}
		$e = $this->getZMEvent($event_id);
		if ($e->monitor_id !== $camera_id)
		{
			throw new ForbiddenHttpException();
		}

	}

	public function actionViewArchive($camera_id, $event_id)
	{
		$this->checkCameraAccess($camera_id, $event_id);
		return $this->render('view_archive',
			[
				'camera_id' => $camera_id,
				'id' => $event_id,
				'event' => $this->getZMEvent($event_id),
			]);
	}

	public function actionStreamEvent($camera_id, $event_id)
	{
		$this->checkCameraAccess($camera_id, $event_id);
		$source_url = Yii::$app->params['zmUrl'].'/zm/index.php?mode=mpeg&format=h264&eid='.$event_id.'&view=view_video';
		$fp = fopen($source_url, 'r', false);
		if ($fp)
		{
			Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
			// pass data
			fpassthru($fp);
			fclose($fp);
		}
		else throw new NotFoundHttpException();
	}
}