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<?php

/**
 * Income over time endpoint
 *
 * @package Give
 */

namespace Give\API\Endpoints\Reports;

class Income extends Endpoint
{

    protected $payments;

    public function __construct()
    {
        $this->endpoint = 'income';
    }

    public function getReport($request)
    {
        $start = date_create($request->get_param('start'));
        $end = date_create($request->get_param('end'));
        $diff = date_diff($start, $end);

        $dataset = [];

        switch (true) {
            case ($diff->days > 12):
                $interval = round($diff->days / 12);
                $data = $this->get_data($start, $end, 'P' . $interval . 'D');
                break;
            case ($diff->days > 5):
                $data = $this->get_data($start, $end, 'P1D');
                break;
            case ($diff->days > 4):
                $data = $this->get_data($start, $end, 'PT12H');
                break;
            case ($diff->days > 2):
                $data = $this->get_data($start, $end, 'PT3H');
                break;
            case ($diff->days >= 0):
                $data = $this->get_data($start, $end, 'PT1H');
                break;
        }

        return $data;
    }

    public function get_data($start, $end, $intervalStr)
    {
        $tooltips = [];
        $income = [];

        $interval = new \DateInterval($intervalStr);

        $periodStart = clone $start;
        $periodEnd = clone $start;

        // Subtract interval to set up period start
        date_sub($periodStart, $interval);

        while ($periodStart < $end) {
            $values = $this->get_values($periodStart->format('Y-m-d H:i:s'), $periodEnd->format('Y-m-d H:i:s'));
            $incomeForPeriod = $values['earnings'];
            $donorsForPeriod = $values['donor_count'];
            $time = $periodEnd->format('Y-m-d H:i:s');

            switch ($intervalStr) {
                case 'P1D':
                    $time = $periodStart->format('Y-m-d');
                    $periodLabel = $periodStart->format('l');
                    break;
                case 'PT12H':
                case 'PT3H':
                case 'PT1H':
                    $periodLabel = $periodStart->format('D ga') . ' - ' . $periodEnd->format('D ga');
                    break;
                default:
                    $periodLabel = $periodStart->format('M j, Y') . ' - ' . $periodEnd->format('M j, Y');
            }

            $income[] = [
                'x' => $time,
                'y' => $incomeForPeriod,
            ];

            $tooltips[] = [
                'title' => give_currency_filter(
                    give_format_amount($incomeForPeriod),
                    [
                        'currency_code' => $this->currency,
                        'decode_currency' => true,
                        'sanitize' => false,
                    ]
                ),
                'body' => $donorsForPeriod . ' ' . __('Donors', 'give'),
                'footer' => $periodLabel,
            ];

            // Add interval to set up next period
            date_add($periodStart, $interval);
            date_add($periodEnd, $interval);
        }

        if ($intervalStr === 'P1D') {
            $income = array_slice($income, 1);
            $tooltips = array_slice($tooltips, 1);
        }

        // Create data object to be returned, with 'highlights' object containing total and average figures to display
        $data = [
            'datasets' => [
                [
                    'data' => $income,
                    'tooltips' => $tooltips,
                ],
            ],
        ];

        return $data;
    }

    public function get_values($startStr, $endStr)
    {
        $paymentObjects = $this->getPayments($startStr, $endStr);

        $earnings = 0;
        $donors = [];

        foreach ($paymentObjects as $paymentObject) {
            if ($paymentObject->date >= $startStr && $paymentObject->date < $endStr) {
                if ($paymentObject->status == 'publish' || $paymentObject->status == 'give_subscription') {
                    $earnings += $paymentObject->total;
                    $donors[] = $paymentObject->donor_id;
                }
            }
        }

        $unique = array_unique($donors);

        return [
            'earnings' => $earnings,
            'donor_count' => count($unique),
        ];
    }

}