@page
@model IndexModel
@using SharedKernel.Extensions
@{
    ViewData["Title"] = "상황판";

    var h = Model.MailHealth;

    // 상태 단계 결정 (가장 심각한 시그널 기준)
    string mailLevel = "ok";
    string mailMessage = "정상";
    if (h.ProcessingStuckCount > 0)
    {
        mailLevel = "danger";
        mailMessage = $"Processing 갇힘 {h.ProcessingStuckCount}건 — 워커 다운/락 의심";
    }
    else if (h.StalePendingCount > 0)
    {
        mailLevel = "danger";
        mailMessage = $"24시간 이상 미처리 Pending {h.StalePendingCount}건 — Janitor 또는 SMTP 점검";
    }
    else if (h.PendingCount >= 1000)
    {
        mailLevel = "danger";
        mailMessage = $"큐 적체 {h.PendingCount:N0}건 — 큰 폭 처리 지연";
    }
    else if (h.PendingCount >= 100)
    {
        mailLevel = "warning";
        mailMessage = $"큐 적체 {h.PendingCount:N0}건 — 처리 지연 주의";
    }
    else if (h.OldestPendingAt.HasValue && (DateTime.UtcNow - h.OldestPendingAt.Value).TotalHours >= 1)
    {
        mailLevel = "warning";
        mailMessage = $"가장 오래된 Pending이 1시간 이상 — 폴링 점검";
    }

    string mailBadgeClass = mailLevel switch
    {
        "danger" => "bg-danger",
        "warning" => "bg-warning text-dark",
        _ => "bg-success"
    };

    string mailBadgeLabel = mailLevel switch
    {
        "danger" => "위험",
        "warning" => "주의",
        _ => "정상"
    };

    string oldestPendingDisplay = h.OldestPendingAt.HasValue
        ? $"{h.OldestPendingAt.Value.GetDateAt()} ({(int)(DateTime.UtcNow - h.OldestPendingAt.Value).TotalMinutes}분 전)"
        : "-";
}

<div class="container-fluid">
    <h3>@ViewData["Title"]</h3>
    <hr />

    <div class="row g-3">
        <div class="col-12 col-xl-6">
            <div class="card">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <strong>Mail Queue 상태</strong>
                    <span class="badge @mailBadgeClass">@mailBadgeLabel</span>
                </div>
                <div class="card-body">
                    <p class="text-muted small mb-3">@mailMessage</p>

                    <div class="row row-cols-2 row-cols-md-3 g-2 mb-3">
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">대기</div>
                                <div class="fs-5 fw-bold @(h.PendingCount >= 1000 ? "text-danger" : h.PendingCount >= 100 ? "text-warning" : null)">@h.PendingCount.ToString("N0")</div>
                            </div>
                        </div>
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">처리 중 (5분 +)</div>
                                <div class="fs-5 fw-bold @(h.ProcessingStuckCount > 0 ? "text-danger" : null)">@h.ProcessingStuckCount.ToString("N0")</div>
                            </div>
                        </div>
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">stale (24h +)</div>
                                <div class="fs-5 fw-bold @(h.StalePendingCount > 0 ? "text-danger" : null)">@h.StalePendingCount.ToString("N0")</div>
                            </div>
                        </div>
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">최근 24h 발송</div>
                                <div class="fs-5 fw-bold text-success">@h.Sent24hCount.ToString("N0")</div>
                            </div>
                        </div>
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">최근 24h 실패</div>
                                <div class="fs-5 fw-bold @(h.Failed24hCount > 0 ? "text-warning" : null)">@h.Failed24hCount.ToString("N0")</div>
                            </div>
                        </div>
                        <div class="col">
                            <div class="border rounded p-2 text-center">
                                <div class="text-muted small">전체 행 수</div>
                                <div class="fs-5 fw-bold">@h.TotalRowCount.ToString("N0")</div>
                            </div>
                        </div>
                    </div>

                    <table class="table table-sm mb-3">
                        <tbody>
                            <tr>
                                <th class="w-25 text-muted fw-normal">가장 오래된 Pending</th>
                                <td>@oldestPendingDisplay</td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>
</div>