<?php
// fetch_balance.php
function fetch_balances($DB, $fromdate, $todate) {

    return [];
    // require_once($_SERVER['DOCUMENT_ROOT'] . "/lib/mydb.php");
    // $pdo = db_connect();

    // // 현재 날짜
    // $currentDate = date("Y-m-d");

    // // fromdate 또는 todate가 빈 문자열이거나 null인 경우 처리
    // if ($fromdate === "" || $fromdate === null || $todate === "" || $todate === null) {
    //     $fromdate = date("Y-m-01");
    //     $todate = $currentDate;
    // }

    // $initialBalances = [];

    // // 이월 잔액을 직접 계산하는 로직
    // $lastMonthEnd = date("Y-m-t", strtotime($fromdate . " -1 month"));

    // // 미수금  내역 조회 (work + output_extra, outdate, ET_total)
    // $salesBeforeSql = "
    //     SELECT o.secondordnum, SUM(COALESCE(e.ET_total, 0)) AS total_sales 
    //     FROM {$DB}.work o
    //     LEFT JOIN {$DB}.output_extra e ON o.num = e.parent_num
    //     WHERE o.outdate <= :lastMonthEnd AND (o.is_deleted IS NULL or o.is_deleted = 0)
    //     GROUP BY o.secondordnum
    // ";
    // $paymentBeforeSql = "
    //     SELECT secondordnum, SUM(CAST(REPLACE(amount, ',', '') AS SIGNED)) AS total_payment 
    //     FROM {$DB}.account_juil
    //     WHERE registDate <= :lastMonthEnd AND (is_deleted IS NULL or is_deleted = 0) AND content = '거래처 수금'
    //     AND (dueDate = '0000-00-00' OR dueDate IS NULL OR dueDate = '')
    //     GROUP BY secondordnum
    // ";

    // // 전월까지의 매출과 수금 데이터 가져오기
    // $salesBeforeStmt = $pdo->prepare($salesBeforeSql);
    // $salesBeforeStmt->execute([':lastMonthEnd' => $lastMonthEnd]);
    // $salesBeforeData = $salesBeforeStmt->fetchAll(PDO::FETCH_ASSOC);

    // $paymentBeforeStmt = $pdo->prepare($paymentBeforeSql);
    // $paymentBeforeStmt->execute([':lastMonthEnd' => $lastMonthEnd]);
    // $paymentBeforeData = $paymentBeforeStmt->fetchAll(PDO::FETCH_ASSOC);

    // // 이월 잔액 계산
    // foreach ($salesBeforeData as $row) {
    //     $secondordnum = $row['secondordnum'];
    //     $total_sales_before = round((float)$row['total_sales'],2); // 부가세 포함(이미 ET_total은 부가세 포함)

    //     if (!isset($initialBalances[$secondordnum])) {
    //         $initialBalances[$secondordnum] = 0;
    //     }

    //     $initialBalances[$secondordnum] += $total_sales_before;
    // }

    // foreach ($paymentBeforeData as $row) {
    //     $secondordnum = $row['secondordnum'];
    //     $total_payment_before = (float)$row['total_payment'];

    //     if (!isset($initialBalances[$secondordnum])) {
    //         $initialBalances[$secondordnum] = 0;
    //     }

    //     $initialBalances[$secondordnum] -= $total_payment_before;
    // }

    // // 당월 매출 내역 가져오기 (work + output_extra, outdate, ET_total)
    // $salesSql = "
    //     SELECT o.secondordnum, COALESCE(e.ET_total, 0) AS ET_total
    //     FROM {$DB}.work o
    //     LEFT JOIN {$DB}.output_extra e ON o.num = e.parent_num
    //     WHERE (o.outdate BETWEEN date('$fromdate') AND date('$todate')) AND  (o.is_deleted IS NULL or o.is_deleted = 0)
    // ";

    // $salesStmt = $pdo->prepare($salesSql);
    // $salesStmt->execute();
    // $salesData = $salesStmt->fetchAll(PDO::FETCH_ASSOC);

    // $salesResults = [];
    // foreach ($salesData as $row) {
    //     $secondordnum = $row['secondordnum'];
    //     $total_sales = (float)$row['ET_total'];  // ET_total은 부가세 포함

    //     if (!isset($salesResults[$secondordnum])) {
    //         $salesResults[$secondordnum] = 0;
    //     }
    //     $salesResults[$secondordnum] += round($total_sales,2);
    // }

    // // 당월 수금 내역 가져오기 (account_juil 테이블)
    // $paymentSql = "
    //     SELECT secondordnum, SUM(CAST(REPLACE(amount, ',', '') AS SIGNED)) AS total_payment
    //     FROM {$DB}.account_juil
    //     WHERE registDate BETWEEN date('$fromdate')  AND date('$todate') 
    //     AND (is_deleted IS NULL or is_deleted = 0) AND content = '거래처 수금'
    //     AND (dueDate = '0000-00-00' OR dueDate IS NULL OR dueDate = '')
    //     GROUP BY secondordnum
    // ";

    // $paymentStmt = $pdo->prepare($paymentSql);
    // $paymentStmt->execute();
    // $paymentData = $paymentStmt->fetchAll(PDO::FETCH_ASSOC);

    // $paymentResults = [];
    // foreach ($paymentData as $row) {
    //     $secondordnum = $row['secondordnum'];
    //     $total_payment = (float)$row['total_payment'];

    //     if (!isset($paymentResults[$secondordnum])) {
    //         $paymentResults[$secondordnum] = 0;
    //     }
    //     $paymentResults[$secondordnum] += $total_payment;
    // }

    // // 모든 거래처 목록을 생성 (매출, 기초채권)
    // $allResults = array_unique(array_merge(array_keys($salesResults), array_keys($initialBalances)));

    // // 최종 잔액 계산
    // $balances = [];
    // foreach ($allResults as $secondordnum) {
    //     $initialReceivable = isset($initialBalances[$secondordnum]) ? $initialBalances[$secondordnum] : 0;
    //     $total_sales = isset($salesResults[$secondordnum]) ? $salesResults[$secondordnum]  : 0; // 부가세 포함
    //     $total_payment = isset($paymentResults[$secondordnum]) ? $paymentResults[$secondordnum] : 0;

    //     // 최종 잔액
    //     $balances[$secondordnum] = $initialReceivable + $total_sales - $total_payment;
    // }
    // return $balances;
}
?>