@{
    ViewData["Title"] = "Anomaly Detection";
    ViewData["PageIcon"] = "bi-shield-exclamation";
}

<div class="d-flex justify-content-between align-items-center mb-3">
    <div class="d-flex align-items-center gap-2">
        <a asp-controller="Reports" asp-action="Landing" class="btn btn-sm btn-outline-secondary">
            <i class="bi bi-arrow-left"></i>
        </a>
        <p class="text-muted mb-0 small">AI scans your recent bills and expense trends for duplicates, unusual amounts, and accounts running over budget.</p>
    </div>
    <button id="btnRunAnalysis" class="btn btn-warning text-dark">
        <i class="bi bi-magic me-1"></i>Run Analysis
    </button>
</div>

<!-- Idle state -->
<div id="idleState" class="text-center py-5">
    <div class="mb-3" style="font-size:3rem;color:var(--bs-border-color);">
        <i class="bi bi-shield-exclamation"></i>
    </div>
    <h5 class="text-muted">No analysis run yet</h5>
    <p class="text-muted small mb-3">Click <strong>Run Analysis</strong> to scan your bills and expense accounts for anomalies.</p>
    <button class="btn btn-warning btn-sm text-dark" onclick="runAnalysis()">
        <i class="bi bi-magic me-1"></i>Run Analysis
    </button>
</div>

<!-- Loading state -->
<div id="loadingState" class="text-center py-5 d-none">
    <div class="spinner-border text-warning mb-3" role="status"></div>
    <p class="text-muted">Scanning bills and expense accounts for anomalies…<br><small>This usually takes 5–10 seconds.</small></p>
</div>

<!-- Error state -->
<div id="errorState" class="d-none">
    <div class="alert alert-danger alert-permanent d-flex align-items-center gap-2">
        <i class="bi bi-exclamation-triangle-fill"></i>
        <span id="errorMessage">An error occurred.</span>
    </div>
</div>

<!-- Results -->
<div id="analysisResults" class="d-none">

    <!-- Summary badges -->
    <div class="d-flex align-items-center gap-3 mb-4 flex-wrap">
        <div id="badgeCritical" class="d-flex align-items-center gap-2 px-3 py-2 rounded" style="background:#fef2f2;">
            <i class="bi bi-exclamation-octagon-fill text-danger fs-5"></i>
            <div>
                <span id="cntCritical" class="fw-bold fs-5 text-danger">0</span>
                <span class="text-danger small ms-1">Critical</span>
            </div>
        </div>
        <div class="d-flex align-items-center gap-2 px-3 py-2 rounded" style="background:#fffbeb;">
            <i class="bi bi-exclamation-triangle-fill text-warning fs-5"></i>
            <div>
                <span id="cntWarning" class="fw-bold fs-5 text-warning">0</span>
                <span class="text-warning small ms-1">Warnings</span>
            </div>
        </div>
        <div class="d-flex align-items-center gap-2 px-3 py-2 rounded" style="background:#eff6ff;">
            <i class="bi bi-info-circle-fill text-info fs-5"></i>
            <div>
                <span id="cntInfo" class="fw-bold fs-5 text-info">0</span>
                <span class="text-info small ms-1">Info</span>
            </div>
        </div>
        <div id="allClearBadge" class="d-none d-flex align-items-center gap-2 px-3 py-2 rounded" style="background:#f0fdf4;">
            <i class="bi bi-shield-check text-success fs-5"></i>
            <span class="text-success fw-semibold">All Clear — no anomalies detected</span>
        </div>
    </div>

    <!-- Flags list -->
    <div id="flagsList"></div>

    <div class="text-muted small text-end mt-3">
        <i class="bi bi-robot me-1"></i>Generated by AI &middot; <span id="analysisTimestamp"></span>
        &middot; <a href="#" onclick="runAnalysis(); return false;">Re-run</a>
    </div>
</div>

@section Scripts {
<script>
    document.getElementById('btnRunAnalysis').addEventListener('click', runAnalysis);

    const typeLabels = {
        duplicate:       { label: 'Duplicate Bill',        icon: 'bi-files',               color: 'danger' },
        amount_spike:    { label: 'Amount Spike',          icon: 'bi-graph-up-arrow',       color: 'warning' },
        unusual_vendor:  { label: 'Unusual Vendor',        icon: 'bi-person-exclamation',   color: 'warning' },
        account_overrun: { label: 'Account Over Budget',   icon: 'bi-bar-chart-fill',       color: 'info' }
    };

    const severityConfig = {
        critical: { cls: 'border-danger',  headerCls: 'bg-danger text-white',   badgeCls: 'bg-danger' },
        warning:  { cls: 'border-warning', headerCls: 'bg-warning text-dark',   badgeCls: 'bg-warning text-dark' },
        info:     { cls: 'border-info',    headerCls: 'bg-info text-white',      badgeCls: 'bg-info' }
    };

    async function runAnalysis() {
        document.getElementById('idleState').classList.add('d-none');
        document.getElementById('loadingState').classList.remove('d-none');
        document.getElementById('errorState').classList.add('d-none');
        document.getElementById('analysisResults').classList.add('d-none');

        try {
            const resp = await fetch('/Reports/RunAnomalyDetection', {
                method: 'POST',
                headers: { 'RequestVerificationToken': document.querySelector('input[name="__RequestVerificationToken"]')?.value ?? '' }
            });
            const data = await resp.json();

            document.getElementById('loadingState').classList.add('d-none');

            if (!data.success) {
                document.getElementById('errorMessage').textContent = data.errorMessage || 'An error occurred.';
                document.getElementById('errorState').classList.remove('d-none');
                return;
            }

            document.getElementById('cntCritical').textContent = data.criticalCount;
            document.getElementById('cntWarning').textContent = data.warningCount;
            document.getElementById('cntInfo').textContent = data.infoCount;

            const totalFlags = (data.flags || []).length;
            document.getElementById('allClearBadge').classList.toggle('d-none', totalFlags > 0);
            document.getElementById('badgeCritical').parentElement.querySelectorAll(':scope > div:not(#allClearBadge)')
                .forEach(el => el.classList.toggle('d-none', totalFlags === 0));

            const container = document.getElementById('flagsList');
            container.innerHTML = '';

            // Sort: critical first, then warning, then info
            const sorted = [...(data.flags || [])].sort((a, b) => {
                const order = { critical: 0, warning: 1, info: 2 };
                return (order[a.severity] ?? 3) - (order[b.severity] ?? 3);
            });

            sorted.forEach(flag => {
                const typeInfo = typeLabels[flag.type] || { label: flag.type, icon: 'bi-exclamation-circle', color: 'secondary' };
                const sev = severityConfig[flag.severity] || severityConfig.warning;

                const card = document.createElement('div');
                card.className = `card mb-3 border ${sev.cls}`;
                card.innerHTML = `
                    <div class="card-header d-flex align-items-center gap-2 ${sev.headerCls} py-2">
                        <i class="bi ${typeInfo.icon}"></i>
                        <span class="fw-semibold">${flag.title}</span>
                        <span class="badge ${sev.badgeCls} ms-auto text-uppercase" style="font-size:0.65rem;">${flag.severity}</span>
                        <span class="badge bg-light text-dark" style="font-size:0.65rem;">${typeInfo.label}</span>
                        ${flag.billNumber ? `<span class="badge bg-secondary ms-1" style="font-size:0.65rem;">${flag.billNumber}</span>` : ''}
                    </div>
                    <div class="card-body py-2">
                        <p class="mb-1">${flag.description}</p>
                        ${flag.recommendedAction ? `
                        <div class="d-flex align-items-start gap-2 mt-2 p-2 rounded" style="background:var(--bs-tertiary-bg);">
                            <i class="bi bi-arrow-right-circle-fill text-primary mt-1 flex-shrink-0"></i>
                            <span class="small"><strong>Recommended:</strong> ${flag.recommendedAction}</span>
                        </div>` : ''}
                    </div>`;
                container.appendChild(card);
            });

            document.getElementById('analysisTimestamp').textContent = new Date().toLocaleString();
            document.getElementById('analysisResults').classList.remove('d-none');

        } catch (e) {
            document.getElementById('loadingState').classList.add('d-none');
            document.getElementById('errorMessage').textContent = 'Network error — please try again.';
            document.getElementById('errorState').classList.remove('d-none');
        }
    }
</script>
@Html.AntiForgeryToken()
}