Build a Medical Triage Page with Buzz Components + AI

@page "/medical-triage"
@rendermode InteractiveServer
@using Buzz.Blazor.Models

<h1>Medical Triage</h1>

<BuzzTextBox Label="Patient Name" InputText="@_patientName" InputTextChanged="OnPatientNameChanged" />
<BuzzTextBox Label="Primary Complaint" InputText="@_complaint" InputTextChanged="OnComplaintChanged" />
<BuzzSelectBox Label="Triage Severity" Options="@_severityOptions" Value="@_severity" ValueChanged="OnSeverityChanged" />
<BuzzDatePicker Label="Arrival Date" Value="@_arrivalDate" ValueChanged="OnArrivalDateChanged" />
<BuzzTextBox Label="SpO2 (%)" InputText="@_spo2" InputTextChanged="OnSpo2Changed" />
<BuzzCheckBox Label="Requires immediate physician review" Value="@_needsImmediateReview" ValueChanged="OnNeedsImmediateReviewChanged" />

<BuzzStack Direction="horizontal" Gap="0.45rem" Wrap="true" Align="center">
    <BuzzButton Text="Add Case" Variant="primary" OnClick="AddCaseAsync" />
    <BuzzButton Text="Seed Example Cases" Variant="outline" OnClick="SeedCasesAsync" />
    <BuzzButton Text="Clear Closed Cases" Variant="secondary" OnClick="ClearClosedCasesAsync" />
</BuzzStack>

@if (HasCriticalCases)
{
    <BuzzAlert Title="Critical Cases Detected"
               Message="At least one active case is high risk. Review triage actions now."
               Variant="warning"
               Dismissible="false" />
}

<BuzzProgress Label="Active high-risk ratio" Value="@HighRiskPercent" Max="100" Variant="danger" ShowValueLabel="true" />

<BuzzFormAssistant Label="Clinical Note Assistant"
                   Fields="@AssistantFields"
                   EnableAiRiskInsight="true"
                   EnableAiRewriteForMessage="true"
                   MessageDraft="@_handoverDraft"
                   MessageDraftChanged="OnHandoverDraftChanged"
                   AiContextSubject="medical-triage"
                   SourceText="@_aiContextText" />

<BuzzSmartTable Label="Live Triage Board"
                Columns="@_tableColumns"
                Rows="@TableRows"
                Modules="@BuzzSmartTableModules.Analytics"
                ShowAiInsightsPanel="true"
                EnableAiInsights="true"
                AiContextSubject="medical-triage"
                SourceText="@_aiContextText" />

@code {
    private sealed record MedicalCase(
        Guid Id,
        string PatientName,
        string Complaint,
        string Severity,
        string ArrivalDate,
        int? Spo2,
        bool NeedsImmediateReview,
        bool IsClosed);

    private string _patientName = string.Empty;
    private string _complaint = string.Empty;
    private string _severity = "Medium";
    private string _arrivalDate = DateTime.UtcNow.Date.ToString("yyyy-MM-dd");
    private string _spo2 = string.Empty;
    private bool _needsImmediateReview;
    private string _handoverDraft = "Patient is under triage assessment.";
    private readonly string _aiContextText = "Emergency triage workflow for outpatient intake.";
    private readonly IReadOnlyList<string> _severityOptions = ["Low", "Medium", "High", "Critical"];

    private readonly List<MedicalCase> _cases =
    [
        new(Guid.NewGuid(), "Mila Stone", "Chest pain with shortness of breath", "Critical", DateTime.UtcNow.Date.ToString("yyyy-MM-dd"), 90, true, false),
        new(Guid.NewGuid(), "Samir Khan", "Fever and cough", "Medium", DateTime.UtcNow.Date.ToString("yyyy-MM-dd"), 95, false, false)
    ];

    private readonly IReadOnlyList<BuzzTableColumn> _tableColumns =
    [
        new("patient", "Patient", BuzzTableDataType.Text),
        new("complaint", "Complaint", BuzzTableDataType.Text),
        new("severity", "Severity", BuzzTableDataType.Text),
        new("arrival", "Arrival", BuzzTableDataType.Date),
        new("spo2", "SpO2", BuzzTableDataType.Number),
        new("review", "Immediate Review", BuzzTableDataType.Boolean)
    ];

    private IReadOnlyList<BuzzFormFieldState> AssistantFields =>
    [
        new("patient", "Patient Name", _patientName, true),
        new("complaint", "Primary Complaint", _complaint, true),
        new("severity", "Triage Severity", _severity, true)
    ];

    private IReadOnlyList<IReadOnlyDictionary<string, string>> TableRows =>
        _cases.Where(entry => !entry.IsClosed)
             .Select(entry => new Dictionary<string, string>
             {
                 ["patient"] = entry.PatientName,
                 ["complaint"] = entry.Complaint,
                 ["severity"] = entry.Severity,
                 ["arrival"] = entry.ArrivalDate,
                 ["spo2"] = entry.Spo2?.ToString() ?? string.Empty,
                 ["review"] = entry.NeedsImmediateReview ? "true" : "false"
             })
             .ToList();

    private bool HasCriticalCases => _cases.Any(entry => !entry.IsClosed && (entry.Spo2 is <= 91 || entry.Severity is "Critical"));
    private double HighRiskPercent => _cases.Count == 0 ? 0 : Math.Round((_cases.Count(entry => !entry.IsClosed && (entry.NeedsImmediateReview || entry.Severity is "High" or "Critical")) / (double)_cases.Count) * 100, 2);

    private Task OnPatientNameChanged(string value) { _patientName = value; return Task.CompletedTask; }
    private Task OnComplaintChanged(string value) { _complaint = value; return Task.CompletedTask; }
    private Task OnSeverityChanged(string value) { _severity = string.IsNullOrWhiteSpace(value) ? "Medium" : value; return Task.CompletedTask; }
    private Task OnArrivalDateChanged(string value) { _arrivalDate = string.IsNullOrWhiteSpace(value) ? DateTime.UtcNow.Date.ToString("yyyy-MM-dd") : value; return Task.CompletedTask; }
    private Task OnSpo2Changed(string value) { _spo2 = value; return Task.CompletedTask; }
    private Task OnNeedsImmediateReviewChanged(bool value) { _needsImmediateReview = value; return Task.CompletedTask; }
    private Task OnHandoverDraftChanged(string value) { _handoverDraft = value; return Task.CompletedTask; }

    private Task AddCaseAsync()
    {
        if (string.IsNullOrWhiteSpace(_complaint))
        {
            return Task.CompletedTask;
        }

        _cases.Insert(0, new MedicalCase(
            Guid.NewGuid(),
            string.IsNullOrWhiteSpace(_patientName) ? "Unknown" : _patientName.Trim(),
            _complaint.Trim(),
            _severity,
            _arrivalDate,
            int.TryParse(_spo2, out var spo2) ? spo2 : null,
            _needsImmediateReview,
            false));

        _patientName = string.Empty;
        _complaint = string.Empty;
        _spo2 = string.Empty;
        _needsImmediateReview = false;
        return Task.CompletedTask;
    }

    private Task SeedCasesAsync()
    {
        _cases.Add(new MedicalCase(Guid.NewGuid(), "Anita Wells", "Dizziness and low oxygen reading", "High", DateTime.UtcNow.Date.ToString("yyyy-MM-dd"), 91, true, false));
        return Task.CompletedTask;
    }

    private Task ClearClosedCasesAsync()
    {
        _cases.RemoveAll(entry => entry.IsClosed);
        return Task.CompletedTask;
    }
}