<?php

namespace BRSystems\Core\Library\cGoogleApi;

use Google_Client;
use Google_Service_Analytics;
use Google_Service_AnalyticsReporting;
use Google_Service_AnalyticsReporting_DateRange;
use Google_Service_AnalyticsReporting_Dimension;
use Google_Service_AnalyticsReporting_GetReportsRequest;
use Google_Service_AnalyticsReporting_Metric;
use Google_Service_AnalyticsReporting_ReportRequest;

/**
 * Class for
 *
 * @category LIB cGoogleApi
 * @author Mareks Keišs <mareks.keiss@brsystems.lv>
 * @since Version 1.0
 */
class cGoogleApi
{
    public $KEY_FILE_LOCATION = "";
    public $oClient;
    private $GOOGLE_ANALYTICS_VIEW_ID;

    /**
     * Class constructor
     */
    public function __construct($sAppTitle, $ANALYTICS_VIEW_ID)
    {
        if (strlen($sAppTitle) && strlen($ANALYTICS_VIEW_ID)) {
            // Make a curl function if doesn't exists for google api
            if (!function_exists('curl_reset')) {
                function curl_reset(&$ch)
                {
                    $ch = curl_init();
                }
            }

            $this->GOOGLE_ANALYTICS_VIEW_ID = $ANALYTICS_VIEW_ID;

            // Use the developers console and download your service account
            // credentials in JSON format. Place them in this directory or
            // change the key file location if necessary.
            $this->KEY_FILE_LOCATION = __DIR__ . '/client_secret.json';

            // Create and configure a new client object.
            $this->oClient = new Google_Client();
            $this->oClient->setApplicationName($sAppTitle);
            $this->oClient->setAuthConfig($this->KEY_FILE_LOCATION);
            $this->oClient->setScopes(['https://www.googleapis.com/auth/analytics.readonly']);
        }
    }

    /**
     * Function to get total active visitors from real time data
     *
     * @author Mareks Keišs <mareks.keiss@brsystems.lv>
     * @category LIB cGoogleApi
     * @return string - active visitors
     */
    public function getTotalVisitors()
    {
        $service = new Google_Service_Analytics($this->oClient);
        $activeVisitors = $service->data_realtime->get(
            $this->GOOGLE_ANALYTICS_VIEW_ID,
            'rt:activeVisitors'
        );

        return $activeVisitors->totalsForAllResults['rt:activeVisitors'];
    }

    /**
     * Function to get user per day for one this and last month
     *
     * @author Mareks Keišs <mareks.keiss@brsystems.lv>
     * @param array $vDates ('s' => start date, 'e' => end date)
     * @category LIB cGoogleApi
     * @return array of data
     */
    public function getUsersPerDayForOneMonth($vDates)
    {
        $analytics = new Google_Service_AnalyticsReporting($this->oClient);

        // Create the DateRange object and set start/end dates.
        $dateRange = new Google_Service_AnalyticsReporting_DateRange();
        $dateRange->setStartDate(date('Y-m-d', $vDates['s']));
        $dateRange->setEndDate(date('Y-m-d', $vDates['e']));

        // Create the Metrics object.
        $data = new Google_Service_AnalyticsReporting_Metric();
        $data->setExpression("ga:users");
        $data->setAlias("users a day:");

        //Create the Dimensions object.
        $dimension = new Google_Service_AnalyticsReporting_Dimension();
        $dimension->setName("ga:date");

        // Create the ReportRequest object.
        $request = new Google_Service_AnalyticsReporting_ReportRequest();
        $request->setViewId($this->GOOGLE_ANALYTICS_VIEW_ID);
        $request->setDateRanges($dateRange);
        $request->setDimensions(array($dimension));
        $request->setMetrics(array($data));

        // Get and work with data
        $vReturn = array();
        $body = new Google_Service_AnalyticsReporting_GetReportsRequest();
        $body->setReportRequests(array($request));
        $vData = $analytics->reports->batchGet($body);
        if (!empty($vData)) {
            for ($index = 0; $index < count($vData); $index++) {
                $d = $vData[$index];
                $rows = $d->getData()->getRows();

                for ($rowIndex = 0; $rowIndex < count($rows); $rowIndex++) {
                    $row = $rows[$rowIndex];
                    $dimensions = $row->getDimensions();
                    $metrics = $row->getMetrics();
                    if (!empty($dimensions[0])) {
                        for ($j = 0; $j < count($metrics); $j++) {
                            $values = $metrics[$j]->getValues();
                            if (!empty($values[0])) {
                                $key = date("n", strtotime($dimensions[0]));
                                $subKey = date("j", strtotime($dimensions[0]));
                                $vReturn[$key][$subKey] = $values[0];
                            }
                        }
                    }

                }
            }
        }

        return $vReturn;
    }

    /**
     * Function to get user per month for this and last year
     *
     * @author Mareks Keišs <mareks.keiss@brsystems.lv>
     * @param array $vDates ('s' => start date, 'e' => end date)
     * @category LIB cGoogleApi
     * @return array of data
     */
    public function getUsersPerMonthForYear($vDates)
    {
        $analytics = new Google_Service_AnalyticsReporting($this->oClient);

        // Create the DateRange object and set start/end dates.
        $dateRange = new Google_Service_AnalyticsReporting_DateRange();
        $dateRange->setStartDate(date('Y-m-d', $vDates['s']));
        $dateRange->setEndDate(date('Y-m-d', $vDates['e']));

        // Create the Metrics object.
        $data = new Google_Service_AnalyticsReporting_Metric();
        $data->setExpression("ga:users");
        $data->setAlias("users a month:");

        //Create the Dimensions object.
        $dimension = new Google_Service_AnalyticsReporting_Dimension();
        $dimension->setName("ga:year");
        //Create the Dimensions object.
        $dimension2 = new Google_Service_AnalyticsReporting_Dimension();
        $dimension2->setName("ga:month");

        // Create the ReportRequest object.
        $request = new Google_Service_AnalyticsReporting_ReportRequest();
        $request->setViewId($this->GOOGLE_ANALYTICS_VIEW_ID);
        $request->setDateRanges($dateRange);
        $request->setDimensions(array($dimension, $dimension2));
        $request->setMetrics(array($data));

        // Get and work with data
        $vReturn = array();
        $body = new Google_Service_AnalyticsReporting_GetReportsRequest();
        $body->setReportRequests(array($request));
        $vData = $analytics->reports->batchGet($body);

        if (!empty($vData)) {
            for ($index = 0; $index < count($vData); $index++) {
                $d = $vData[$index];
                $rows = $d->getData()->getRows();

                for ($rowIndex = 0; $rowIndex < count($rows); $rowIndex++) {
                    $row = $rows[$rowIndex];
                    $dimensions = $row->getDimensions();
                    $metrics = $row->getMetrics();

                    if (!empty($dimensions[0]) && !empty($dimensions[1])) {
                        for ($j = 0; $j < count($metrics); $j++) {
                            $values = $metrics[$j]->getValues();
                            if (!empty($values[0]))
                                $vReturn[$dimensions[0]][intval($dimensions[1])] = $values[0];

                        }
                    }

                }
            }
        }

        return $vReturn;
    }
}