<?php
require_once($_SERVER['DOCUMENT_ROOT']."/config.php");

$apartment_id = intval($_GET['apartment_id']);
$user_id = intval($_SESSION['id']);
$calculation_info = $_POST['calculation_info'];
$catalog_id = $_POST['catalog_id'];

function round2($num) {
    return round($num, 2);
}

$P = floatval($calculation_info['P']);
$I = floatval($calculation_info['I']);
$S = floatval($calculation_info['S']);
$T = intval($calculation_info['T']);
$L = intval($calculation_info['L']);
$type_payment = isset($calculation_info['type_payment']) ? $calculation_info['type_payment'] : 'equal_payments';

$R = $P - $I - $S;

$result = array(
    'type' => '',
    'R' => round2($R),
    'A' => 0,
    'A_o' => null,
    'details' => array()
);

if ($T % $L === 0) {
    $N = $T / $L;
    $result['type'] = 'equal_no_remainder';
    $result['A'] = round2($R / $N);
    $result['details'] = array('N' => $N);
} else {
    $fullPeriods = floor($T / $L);
    $remainder = $T % $L;

    if ($type_payment === 'equal_payments') {
        $N = $fullPeriods + 1;
        $result['type'] = 'equal_with_remainder';
        $result['A'] = round2($R / $N);
        $result['details'] = array(
            'fullPeriods' => $fullPeriods,
            'remainder' => $remainder,
            'N' => $N
        );
    } else {
        $Am = $R / $T;
        $result['type'] = 'decreasing';
        $result['A'] = round2($Am * $L);
        $result['A_o'] = round2($Am * $remainder);
        $result['details'] = array(
            'fullPeriods' => $fullPeriods,
            'remainder' => $remainder,
            'T' => $T
        );
    }
}

$compare = array(
    'R' => array('frontend' => floatval($calculation_info['R']), 'backend' => $result['R']),
    'A' => array('frontend' => floatval($calculation_info['A']), 'backend' => $result['A']),
    'A_o' => array('frontend' => isset($calculation_info['A_o']) ? floatval($calculation_info['A_o']) : null, 'backend' => $result['A_o'])
);
foreach ($compare as $key => $val) {
    echo "$key: frontend = {$val['frontend']}, backend = {$val['backend']}";
    if ($val['frontend'] == $val['backend']) {
        echo " ✅ OK";
    } else {
        echo " ❌ НЕ СОВПАДАЕТ";
    }
    echo "\n";
}
foreach (array('R', 'A', 'A_o') as $key) {
    $calculation_info[$key] = isset($result[$key]) ? $result[$key] : null;
}


if ($apartment_id && $user_id && is_array($calculation_info)) {
    $jsonData = mysql_real_escape_string(json_encode($calculation_info, JSON_UNESCAPED_UNICODE));
    $new_installment_price = isset($calculation_info['P']) ? floatval($calculation_info['P']) : 0;

    $sql_check = "SELECT id FROM sended_pdf_complexes WHERE id_agent = '$user_id' AND id_object = '$apartment_id' AND sent_catalog_id = '$catalog_id'";
    $res_check = mysql_query($sql_check);

    if (mysql_num_rows($res_check) > 0) {

        $sql_update = "UPDATE sended_pdf_complexes 
                       SET calculation_data = '$jsonData', new_installment_price = '$new_installment_price' 
                       WHERE id_agent = '$user_id' AND id_object = '$apartment_id'  AND sent_catalog_id = '$catalog_id' ";
        mysql_query($sql_update);
    } 
}
?>