<?php
require_once __DIR__ . '/../app/lib/auth.php';
require_once __DIR__ . '/../app/lib/db.php';
require_once __DIR__ . '/../app/lib/helpers.php';

check_auth();

$pdo = db();
$uid = user_id();
$error = '';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    try {
        $accountType = $_POST['account_type'] ?? '';
        $institutionName = trim($_POST['institution_name'] ?? '');
        $accountName = trim($_POST['account_name'] ?? '');
        $openingBalance = (float)str_replace(',', '', (string)($_POST['opening_balance'] ?? 0));

        $cardKind = $_POST['card_kind'] ?? null;
        $billingDay = !empty($_POST['billing_day']) ? (int)$_POST['billing_day'] : null;
        $paymentDay = !empty($_POST['payment_day']) ? (int)$_POST['payment_day'] : null;
        $useCreditGracePeriod = !empty($_POST['use_credit_grace_period']) ? 1 : 0;
        $billingCycleMemo = trim($_POST['billing_cycle_memo'] ?? '');

        $statementStartMonthOffset = isset($_POST['statement_start_month_offset']) && $_POST['statement_start_month_offset'] !== ''
            ? (int)$_POST['statement_start_month_offset']
            : null;
        $statementStartDay = !empty($_POST['statement_start_day']) ? (int)$_POST['statement_start_day'] : null;
        $statementEndMonthOffset = isset($_POST['statement_end_month_offset']) && $_POST['statement_end_month_offset'] !== ''
            ? (int)$_POST['statement_end_month_offset']
            : null;
        $statementEndDay = !empty($_POST['statement_end_day']) ? (int)$_POST['statement_end_day'] : null;

        if (!in_array($accountType, ['bank', 'card', 'cash', 'other'], true)) {
            throw new RuntimeException('계정 유형이 올바르지 않습니다.');
        }

        if ($institutionName === '' || $accountName === '') {
            throw new RuntimeException('기관명과 계좌명을 입력하세요.');
        }

        if ($accountType !== 'card') {
            $cardKind = null;
            $billingDay = null;
            $paymentDay = null;
            $useCreditGracePeriod = 0;
            $billingCycleMemo = null;
            $statementStartMonthOffset = null;
            $statementStartDay = null;
            $statementEndMonthOffset = null;
            $statementEndDay = null;
        } else {
            if (!in_array($cardKind, ['credit', 'check'], true)) {
                throw new RuntimeException('카드 종류를 선택하세요.');
            }

            if ($cardKind === 'check') {
                $billingDay = null;
                $paymentDay = null;
                $useCreditGracePeriod = 0;
                $billingCycleMemo = '즉시출금';
                $statementStartMonthOffset = null;
                $statementStartDay = null;
                $statementEndMonthOffset = null;
                $statementEndDay = null;
            }

            if ($cardKind === 'credit') {
                if ($paymentDay === null || $paymentDay < 1 || $paymentDay > 31) {
                    throw new RuntimeException('납부일은 1~31 사이여야 합니다.');
                }

                if ($useCreditGracePeriod) {
                    if ($statementStartMonthOffset === null || $statementEndMonthOffset === null) {
                        throw new RuntimeException('사용기간 기준 월을 선택하세요.');
                    }

                    if ($statementStartDay === null || $statementStartDay < 1 || $statementStartDay > 31) {
                        throw new RuntimeException('사용기간 시작일은 1~31 사이여야 합니다.');
                    }

                    if ($statementEndDay === null || $statementEndDay < 1 || $statementEndDay > 31) {
                        throw new RuntimeException('사용기간 종료일은 1~31 사이여야 합니다.');
                    }
                } else {
                    $statementStartMonthOffset = null;
                    $statementStartDay = null;
                    $statementEndMonthOffset = null;
                    $statementEndDay = null;
                }

                if ($billingCycleMemo === '') {
                    $billingCycleMemo = null;
                }
            }
        }

        $stmt = $pdo->prepare("
            INSERT INTO accounts
            (
                user_id,
                account_type,
                institution_name,
                account_name,
                opening_balance,
                current_balance,
                is_active,
                card_kind,
                billing_day,
                payment_day,
                use_credit_grace_period,
                statement_start_month_offset,
                statement_start_day,
                statement_end_month_offset,
                statement_end_day,
                billing_cycle_memo
            )
            VALUES
            (?, ?, ?, ?, ?, ?, 1, ?, ?, ?, ?, ?, ?, ?, ?, ?)
        ");

        $stmt->execute([
            $uid,
            $accountType,
            $institutionName,
            $accountName,
            $openingBalance,
            $openingBalance,
            $cardKind,
            $billingDay,
            $paymentDay,
            $useCreditGracePeriod,
            $statementStartMonthOffset,
            $statementStartDay,
            $statementEndMonthOffset,
            $statementEndDay,
            $billingCycleMemo
        ]);

        redirect('/accounts.php');

    } catch (Throwable $e) {
        $error = $e->getMessage();
    }
}

require __DIR__ . '/../app/views/header.php';
?>

<div class="page-head">
    <h2>계좌 / 카드 추가</h2>
    <a href="/accounts.php" class="btn btn-outline-secondary">목록</a>
</div>

<?php if ($error): ?>
<div class="alert alert-danger"><?= h($error) ?></div>
<?php endif; ?>

<div class="card finance-card">
    <div class="card-body">
        <form method="post" class="row g-3" id="accountCreateForm">

            <div class="col-12 col-md-4">
                <label class="form-label">유형</label>
                <select name="account_type" id="account_type" class="form-select" required>
                    <option value="bank">은행계좌</option>
                    <option value="card">카드</option>
                    <option value="cash">현금</option>
                    <option value="other">기타</option>
                </select>
            </div>

            <div class="col-12 col-md-4">
                <label class="form-label">기관명</label>
                <input type="text" name="institution_name" class="form-control" placeholder="예: IBK, 우리, 농협" required>
            </div>

            <div class="col-12 col-md-4">
                <label class="form-label">계좌명</label>
                <input type="text" name="account_name" class="form-control" placeholder="예: IBK 신용카드 / IBK 체크카드" required>
            </div>

            <div class="col-12 col-md-4">
                <label class="form-label">시작 잔액</label>
                <input type="text" name="opening_balance" id="opening_balance" class="form-control" value="0" inputmode="numeric" required>
            </div>

            <div class="col-12" id="card_setting_wrap" style="display:none;">
                <div class="loan-create-highlight">
                    <div class="title">카드 설정</div>
                    <div class="desc">
                        카드사마다 신용공여기간이 다르므로 직접 설정 가능합니다.
                    </div>

                    <div class="row g-3 mt-1">

                        <div class="col-12 col-md-3">
                            <label class="form-label">카드 종류</label>
                            <select name="card_kind" id="card_kind" class="form-select">
                                <option value="">선택하세요</option>
                                <option value="credit">신용카드</option>
                                <option value="check">체크카드</option>
                            </select>
                        </div>

                        <div class="col-12 col-md-3 credit-only">
                            <label class="form-label">납부일</label>
                            <input type="number" name="payment_day" class="form-control" min="1" max="31" placeholder="예: 25">
                        </div>

                        <div class="col-12 col-md-3 credit-only d-flex align-items-end">
                            <div class="form-check">
                                <input class="form-check-input" type="checkbox" name="use_credit_grace_period" id="use_credit_grace_period" value="1" checked>
                                <label class="form-check-label">신용공여기간 계산 사용</label>
                            </div>
                        </div>

                        <div class="col-12 credit-only">
                            <hr>
                            <div class="fw-bold mb-2">청구월 기준 사용기간</div>
                        </div>

                        <div class="col-12 col-md-3 credit-period-only">
                            <label class="form-label">시작 월 기준</label>
                            <select name="statement_start_month_offset" class="form-select">
                                <option value="-2">전전월</option>
                                <option value="-1" selected>전월</option>
                                <option value="0">당월</option>
                                <option value="1">익월</option>
                            </select>
                        </div>

                        <div class="col-12 col-md-3 credit-period-only">
                            <label class="form-label">시작일</label>
                            <input type="number" name="statement_start_day" class="form-control" min="1" max="31" placeholder="예: 11">
                        </div>

                        <div class="col-12 col-md-3 credit-period-only">
                            <label class="form-label">종료 월 기준</label>
                            <select name="statement_end_month_offset" class="form-select">
                                <option value="-2">전전월</option>
                                <option value="-1">전월</option>
                                <option value="0" selected>당월</option>
                                <option value="1">익월</option>
                            </select>
                        </div>

                        <div class="col-12 col-md-3 credit-period-only">
                            <label class="form-label">종료일</label>
                            <input type="number" name="statement_end_day" class="form-control" min="1" max="31" placeholder="예: 10">
                        </div>

                        <div class="col-12 credit-only">
                            <label class="form-label">메모</label>
                            <input type="text" name="billing_cycle_memo" class="form-control" placeholder="예: 전월 11일 ~ 당월 10일 사용분">
                        </div>

                        <div class="col-12 check-only" style="display:none;">
                            <div class="alert alert-secondary mb-0">
                                체크카드는 즉시출금 기준으로 처리됩니다.
                            </div>
                        </div>

                    </div>
                </div>
            </div>

            <div class="col-12 d-flex gap-2">
                <button class="btn btn-primary">추가</button>
                <a href="/accounts.php" class="btn btn-outline-secondary">목록</a>
            </div>

        </form>
    </div>
</div>

<script>
(function () {
    const accountTypeEl = document.getElementById('account_type');
    const cardWrapEl = document.getElementById('card_setting_wrap');
    const cardKindEl = document.getElementById('card_kind');
    const useGraceEl = document.getElementById('use_credit_grace_period');

    const creditOnlyEls = document.querySelectorAll('.credit-only');
    const creditPeriodOnlyEls = document.querySelectorAll('.credit-period-only');
    const checkOnlyEls = document.querySelectorAll('.check-only');

    const openingBalanceEl = document.getElementById('opening_balance');

    function comma(v) {
        v = String(v).replace(/,/g, '').replace(/[^\d.-]/g, '');
        if (!v) return '';
        return Number(v).toLocaleString('ko-KR');
    }

    function show(nodes, on) {
        nodes.forEach(el => el.style.display = on ? '' : 'none');
    }

    function refresh() {
        const isCard = accountTypeEl.value === 'card';
        const isCredit = cardKindEl.value === 'credit';
        const isCheck = cardKindEl.value === 'check';
        const useGrace = useGraceEl.checked;

        cardWrapEl.style.display = isCard ? '' : 'none';

        show(creditOnlyEls, isCredit);
        show(checkOnlyEls, isCheck);
        show(creditPeriodOnlyEls, isCredit && useGrace);
    }

    openingBalanceEl.addEventListener('input', function () {
        this.value = comma(this.value);
    });

    document.getElementById('accountCreateForm').addEventListener('submit', function () {
        openingBalanceEl.value = openingBalanceEl.value.replace(/,/g, '');
    });

    accountTypeEl.addEventListener('change', refresh);
    cardKindEl.addEventListener('change', refresh);
    useGraceEl.addEventListener('change', refresh);

    refresh();
})();
</script>

<?php require __DIR__ . '/../app/views/footer.php'; ?>