Nexus.Reader/src/NexusReader.UI.Shared/Pages/SerilogDemo.razor

@page "/serilog-demo"
@inject ILogger<SerilogDemo> Logger
@inject IJSRuntime JSRuntime

@if (_isDebug)
{
    <div class="serilog-demo-container">
        <div class="header-card glass-panel">
            <div class="header-content">
                <NexusIcon Name="cpu" Size="36" Class="header-icon" />
                <div class="header-text">
                    <h1>Serilog Logging Infrastructure</h1>
                    <p class="subtitle">Production-grade diagnostic pipeline for unified native &amp; web logs</p>
                </div>
            </div>
            <div class="status-badge">
                <span class="status-dot green"></span>
                <span class="status-text">Pipeline Active</span>
            </div>
        </div>

        <div class="demo-grid">
            <!-- Native .NET Logging Panel -->
            <div class="control-card glass-panel">
                <div class="card-header">
                    <NexusIcon Name="terminal" Size="20" Class="card-icon" />
                    <h2>Native .NET Logs (C#)</h2>
                </div>
                <p class="card-desc">Trigger structured C# logs using Dependency Injected ILogger.</p>
                <div class="btn-group">
                    <button class="btn btn-info" @onclick="LogInfo">
                        <NexusIcon Name="info" Size="16" />
                        Log Info
                    </button>
                    <button class="btn btn-warning" @onclick="LogWarning">
                        <NexusIcon Name="alert-triangle" Size="16" />
                        Log Warning
                    </button>
                    <button class="btn btn-error" @onclick="LogError">
                        <NexusIcon Name="x-circle" Size="16" />
                        Log Error Exception
                    </button>
                </div>
            </div>

            <!-- Blazor / JS Interop Bridge Panel -->
            <div class="control-card glass-panel">
                <div class="card-header">
                    <NexusIcon Name="globe" Size="20" Class="card-icon js-icon" />
                    <h2>Blazor / JS WebView Logs</h2>
                </div>
                <p class="card-desc">Trigger logs from JavaScript to verify the interop error capture bridge.</p>
                <div class="btn-group">
                    <button class="btn btn-js-info" @onclick="TriggerJsLog">
                        <NexusIcon Name="message-square" Size="16" />
                        Trigger console.log()
                    </button>
                    <button class="btn btn-js-error" @onclick="TriggerJsException">
                        <NexusIcon Name="zap" Size="16" />
                        Trigger JS Exception
                    </button>
                </div>
            </div>
        </div>

        <!-- Active Log Config Panel -->
        <div class="config-card glass-panel">
            <div class="card-header">
                <NexusIcon Name="settings" Size="20" Class="card-icon" />
                <h2>Pipeline Diagnostics</h2>
            </div>
            <div class="config-grid">
                <div class="config-item">
                    <span class="label">Rolling Daily File Sandbox Path</span>
                    <span class="value code-value">AppDataDirectory/logs/log-*.txt</span>
                </div>
                <div class="config-item">
                    <span class="label">Active Configuration Provider</span>
                    <span class="value">Serilog.Settings.Configuration (appsettings.json)</span>
                </div>
                <div class="config-item">
                    <span class="label">Native Apple Console Sink</span>
                    <span class="value">Serilog.Sinks.Debug (conditional compilation)</span>
                </div>
                <div class="config-item">
                    <span class="label">Native Android Logcat Sink</span>
                    <span class="value">AndroidLogcatSink (direct JNI bindings)</span>
                </div>
            </div>
        </div>
    </div>
}
else
{
    <div class="serilog-demo-container">
        <div class="glass-panel" style="text-align: center; padding: 3rem;">
            <h2>Diagnostics Unavailable</h2>
            <p>This page is only available in DEBUG builds.</p>
        </div>
    </div>
}

@code {
    // Compile-time check ensures _isDebug is baked as false in Release/Test/Production builds,
    // which completely bypasses/strips rendering of the diagnostic UI and avoids exposing internal controls.
#if DEBUG
    private readonly bool _isDebug = true;
#else
    private readonly bool _isDebug = false;
#endif

    private void LogInfo()
    {
        Logger.LogInformation("Structured native log triggered by user from SerilogDemo. Button: LogInfo");
    }

    private void LogWarning()
    {
        Logger.LogWarning("Potential warning log triggered from Blazor razor component at {Time}", DateTime.UtcNow);
    }

    private void LogError()
    {
        try
        {
            throw new InvalidOperationException("Simulated native C# operation exception triggered in Diagnostic dashboard.");
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Captured exception successfully in native Serilog pipeline!");
        }
    }

    private async Task TriggerJsLog()
    {
        try
        {
            await JSRuntime.InvokeVoidAsync("console.log", "Intercepted JS console statement from Blazor WebView interop trigger!");
        }
        catch (Exception ex)
        {
            Logger.LogWarning(ex, "Failed to execute console.log from diagnostic panel.");
        }
    }

    private async Task TriggerJsException()
    {
        try
        {
            // Triggers a TypeError by invoking a non-existent method, which is completely CSP-compliant and works without eval()
            await JSRuntime.InvokeVoidAsync("window.nonExistentFunctionTriggeringException");
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Simulated runtime JS Exception triggered and captured in Blazor UI");
            try
            {
                await JSRuntime.InvokeVoidAsync("console.error", $"Simulated JS Exception: {ex.Message}");
            }
            catch { }
        }
    }
}