<?php
require_once('fixed/config/go_con.php');
ini_set('memory_limit', '512M');

$invoicesSumQuery = <<<SQL
    SELECT SUM(invoices_details_has_how_pay.pay) AS sum
    FROM invoices_details_has_how_pay
    INNER JOIN invoices_details
        ON invoices_details_has_how_pay.invoices_details_id = invoices_details.id
    WHERE
        invoices_details_has_how_pay.date_time >= '2023-04-01 00:00:00' AND
        invoices_details_has_how_pay.date_time < '2023-07-01 00:00:00' AND
        invoices_status_id = 1 AND
        invoices_details_has_how_pay.how_pay_id IN (1,2,3,4,5,6,7,8,9,10)
SQL;

$result = mysqli_query($db, $invoicesSumQuery);

$sum = mysqli_fetch_assoc($result);
if (!$sum) {
    die('sum could not be calculated');
}
$sum = $sum['sum'];


$bondsSumQuery = <<<SQL
    SELECT SUM(bonds_details_has_how_pay.pay) AS sum
    FROM bonds_details_has_how_pay
    INNER JOIN bonds_details
        ON bonds_details_has_how_pay.bonds_details_id = bonds_details.id
    WHERE
        bonds_details_has_how_pay.date_time >= '2023-04-01 00:00:00' AND
        bonds_details_has_how_pay.date_time < '2023-07-01 00:00:00' AND
        bonds_status_id = 1 AND
        branch_id IN (2,3,4,5,6,7,8,10,11,12)
SQL;

$result = mysqli_query($db, $bondsSumQuery);

$sum = mysqli_fetch_assoc($result);
if (!$sum) {
    die('sum could not be calculated');
}
$sum = $sum['sum'];

function inSubsetSum(array $a, float $t, array &$memo = []) : ?array {
    $s = array_reduce($memo, function (?float $carry, array $value) {
        return $carry + $value[1];
    });

    if ($s === $t) {
        return $memo;
    }

    if ($s >= $t) {
        return null;
    }

    $len = count($a);
    $keys = array_keys($a);
    for ($i = 0; $i < $len; ++$i) {
        $k = $keys[$i];
        $v = $a[$k];
        $rem = array_slice($a, $i + 1, null, true);
        $memo = array_merge($memo, [[$k, $v]]);
        $res = inSubsetSum($rem, $t, $memo);
        if ($res !== null) {
            return $res;
        }
    }

    return null;
}

function subsetSum(array $a, float $t) : ?array {
    $subset = inSubsetSum($a, $t);
    $result = [];
    foreach ($subset as $_ => [$k, $v]) {
        $result[$k] = $v;
    }
    return $result;
}

$bondsPayQuery = <<<SQL
    SELECT
        bonds.id AS bonds_id,
        bonds.tretment_id AS tretment_id,
        bonds.bonds_type_type_id AS bonds_type_type_id,
        bonds_details.branch_id AS branch_id,
        bonds_details_has_how_pay.pay AS pay,
        bonds_details_has_how_pay.how_pay_id AS how_pay_id,
        bonds_details_has_how_pay.date_time AS date_time
    FROM bonds_details_has_how_pay
    INNER JOIN bonds_details
        ON bonds_details_has_how_pay.bonds_details_id = bonds_details.id
    INNER JOIN bonds
        ON bonds_details.bonds_id = bonds.id
    WHERE
        bonds_details_has_how_pay.date_time >= '2023-04-01 00:00:00' AND
        bonds_details_has_how_pay.date_time < '2023-07-01 00:00:00' AND
        bonds_status_id = 1 AND
        branch_id IN (2,3,4,5,6,7,8,10,11,12)
    ORDER BY bonds_details_has_how_pay.date_time
SQL;

$result = mysqli_query($db, $bondsPayQuery);
echo mysqli_error($db);
$bonds = [];
while ($bond = mysqli_fetch_assoc($result)) {
    $key = $bond['bonds_id'];
    if (array_key_exists($key, $bonds)) {
        $bonds[$key]['pay'] += floatval($bond['pay']);
    } else {
        $bonds[$key]['pay'] = floatval($bond['pay']);
    }
    $bonds[$key]['bonds_id'] = $bond['bonds_id'];
    $bonds[$key]['tretment_id'] = $bond['tretment_id'];
    $bonds[$key]['bonds_type_type_id'] = $bond['bonds_type_type_id'];
    $bonds[$key]['branch_id'] = $bond['branch_id'];
    $bonds[$key]['how_pay_id'] = $bond['how_pay_id'];
    $bonds[$key]['date_time'] = $bond['date_time'];
}

$sum = 0.0;
$desiredBonds = 140390.26;

$subset = [];

$reached_desired = false;

foreach ($bonds as $key => $bond) {
    if ($sum == $desiredBonds) {
        $reached_desired = true;
        break;
    } else if ($sum < $desiredBonds) {
        $sum += $bond['pay'];
        $subset[$key] = $bond;
        continue;
    }
    break;
}

$year = '23';
$letter = 'B';

// MAX(id) Q1 = 232
// MAX(id) Q2 = 644
$branchData = [
    '2'  => ['1501', 20],
    '3'  => ['0701', 41],
    '4'  => ['2901', 11],
    '5'  => ['0602', 60],
    '6'  => ['KM01', 100],
    '7'  => ['VS01', 0],
    '8'  => ['VS02', 0],
    '9'  => ['PT07', 0],
    '12' => ['2902', 0],
    '13' => ['1502', 0],
];

$sahabiBonds = <<<SQL
    CREATE TABLE IF NOT EXISTS `sahabi_bonds` (
        id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
        bonds_id INT NOT NULL,
        branch_id INT NOT NULL,
        tretment_id INT NOT NULL,
        bonds_type_type_id INT NOT NULL,
        number VARCHAR(14) NOT NULL,
        date_time DATETIME NOT NULL,
        price_no_vat DECIMAL(10, 2) NOT NULL,
        vat DECIMAL(10, 2) NOT NULL,
        total DECIMAL(10, 2) NOT NULL,
        how_pay_id INT NOT NULL
    ) ENGINE=INNODB;
SQL;

// $result = mysqli_query($db, $sahabiBonds);
echo mysqli_error($db);

// $subset = array_reverse($subset, true);

foreach ($subset as $id => $bond) {
    $bData = &$branchData[$bond['branch_id']];
    $branchCode = $bData[0];
    $bData[1] += 1;
    $invoiceNumber = $bData[1];
    $number = "{$year}{$letter}{$branchCode}";
    $number .= str_pad("$invoiceNumber", 7, '0', STR_PAD_LEFT);
    $noVat = $bond['pay'] / 1.15;
    $vat = $bond['pay'] - $noVat;

    $params = [
        $bond['bonds_id'],
        $bond['branch_id'],
        $bond['tretment_id'],
        $bond['bonds_type_type_id'],
        $number,
        $bond['date_time'],
        $noVat,
        $vat,
        $bond['pay'],
        $bond['how_pay_id'],
    ];

    $insertQuery = <<<SQL
        INSERT INTO `sahabi_bonds` (
            bonds_id,
            branch_id,
            tretment_id,
            bonds_type_type_id,
            number,
            date_time,
            price_no_vat,
            vat,
            total,
            how_pay_id
        ) VALUES (
            ?,
            ?,
            ?,
            ?,
            ?,
            ?,
            ?,
            ?,
            ?,
            ?
        );
    SQL;

    $stmt = mysqli_prepare($db, $insertQuery);
    $stmt->bind_param('ssiissdddi', ...$params);
    // $stmt->execute();
}

// $desired = 655476.19;
// $subset = subsetSum($bonds, $desired);
// echo "done";
//
// $subsetSum = array_sum($subset);

// echo "<br>subset sum: $subsetSum";