<?php

/*
 * This file is part of Cachet.
 *
 * (c) Alt Three Services Limited
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CachetHQ\Cachet\Repositories\Metric;

use CachetHQ\Cachet\Facades\Setting as SettingFacade;
use CachetHQ\Cachet\Models\Metric;
use DateInterval;
use Illuminate\Support\Facades\DB;
use Jenssegers\Date\Date;

class MySqlRepository implements MetricInterface
{
    /**
     * The timezone the status page is showing in.
     *
     * @var string
     */
    protected $dateTimeZone;

    /**
     * Creates a new instance of the metric repository.
     *
     * @return void
     */
    public function __construct()
    {
        $this->dateTimeZone = SettingFacade::get('app_timezone');
    }

    /**
     * Returns metrics for the last hour.
     *
     * @param \CachetHQ\Cachet\Models\Metric $metric
     * @param int                            $hour
     * @param int                            $minute
     *
     * @return int
     */
    public function getPointsLastHour(Metric $metric, $hour, $minute)
    {
        $dateTime = (new Date())->setTimezone($this->dateTimeZone);
        $dateTime->sub(new DateInterval('PT'.$hour.'H'))->sub(new DateInterval('PT'.$minute.'M'));
        $timeInterval = $dateTime->format('YmdHi');

        $points = $metric->points()
                    ->whereRaw('DATE_FORMAT(created_at, "%Y%m%d%H%i") = '.$timeInterval)
                    ->groupBy(DB::raw('HOUR(created_at), MINUTE(created_at)'));

        if (!isset($metric->calc_type) || $metric->calc_type == Metric::CALC_SUM) {
            $value = $points->sum('value');
        } elseif ($metric->calc_type == Metric::CALC_AVG) {
            $value = $points->avg('value');
        }

        if ($value === 0 && $metric->default_value != $value) {
            return $metric->default_value;
        }

        return round($value, $metric->places);
    }

    /**
     * Returns metrics for a given hour.
     *
     * @param \CachetHQ\Cachet\Models\Metric $metric
     * @param int                            $hour
     *
     * @return int
     */
    public function getPointsByHour(Metric $metric, $hour)
    {
        $dateTime = (new Date())->setTimezone($this->dateTimeZone);
        $dateTime->sub(new DateInterval('PT'.$hour.'H'));
        $hourInterval = $dateTime->format('YmdH');

        $points = $metric->points()
                    ->whereRaw('DATE_FORMAT(created_at, "%Y%m%d%H") = '.$hourInterval)
                    ->groupBy(DB::raw('HOUR(created_at)'));

        if (!isset($metric->calc_type) || $metric->calc_type == Metric::CALC_SUM) {
            $value = $points->sum('value');
        } elseif ($metric->calc_type == Metric::CALC_AVG) {
            $value = $points->avg('value');
        }

        if ($value === 0 && $metric->default_value != $value) {
            return $metric->default_value;
        }

        return round($value, $metric->places);
    }

    /**
     * Returns metrics for the week.
     *
     * @param \CachetHQ\Cachet\Models\Metric $metric
     *
     * @return int
     */
    public function getPointsForDayInWeek(Metric $metric, $day)
    {
        $dateTime = (new Date())->setTimezone($this->dateTimeZone);
        $dateTime->sub(new DateInterval('P'.$day.'D'));

        $points = $metric->points()
                    ->whereRaw('created_at BETWEEN DATE_SUB(created_at, INTERVAL 1 WEEK) AND NOW()')
                    ->whereRaw('DATE_FORMAT(created_at, "%Y%m%d") = '.$dateTime->format('Ymd'))
                    ->groupBy(DB::raw('DATE_FORMAT(created_at, "%Y%m%d")'));

        if (!isset($metric->calc_type) || $metric->calc_type == Metric::CALC_SUM) {
            $value = $points->sum('value');
        } elseif ($metric->calc_type == Metric::CALC_AVG) {
            $value = $points->avg('value');
        }

        if ($value === 0 && $metric->default_value != $value) {
            return $metric->default_value;
        }

        return round($value, $metric->places);
    }
}