# Host Project

The `JdeScoping.Host` project is the main entry point - an ASP.NET Core application that runs as a Windows Service.

## Program.cs Configuration

```csharp
var builder = WebApplication.CreateBuilder(args);
builder.Host.UseWindowsService();  // Run as Windows Service

// ASP.NET Core services
builder.Services.AddControllersWithViews();
builder.Services.AddRazorPages();
builder.Services.AddSignalR();

// Background services
builder.Services.AddHostedService<SearchProcessorService>();
builder.Services.AddHostedService<DataSyncService>();

// Core dependencies (from JdeScoping.Core)
builder.Services.AddScoped<ISearchRepository, SearchRepository>();
builder.Services.AddScoped<ISearchService, SearchService>();
builder.Services.AddScoped<IExcelExportService, ExcelExportService>();

// Data source registration (file-based for dev, Oracle for prod)
var dataSourceOptions = builder.Configuration
    .GetSection("DataSource").Get<DataSourceOptions>();

if (dataSourceOptions?.UseFileDataSource == true)
{
    builder.Services.AddScoped<IJdeDataSource, JdeFileDataSource>();
    builder.Services.AddScoped<ICmsDataSource, CmsFileDataSource>();
}
else
{
    builder.Services.AddScoped<IJdeDataSource, JdeOracleDataSource>();
    builder.Services.AddScoped<ICmsDataSource, CmsOracleDataSource>();
}

// Auth registration (fake for dev, LDAP for prod)
var authOptions = builder.Configuration
    .GetSection("Auth").Get<AuthOptions>();

if (authOptions?.UseFakeAuth == true)
{
    builder.Services.AddScoped<IAuthService, FakeAuthService>();
}
else
{
    builder.Services.AddScoped<IAuthService, LdapAuthService>();
}

// Configuration
builder.Services.Configure<LdapOptions>(builder.Configuration.GetSection("Ldap"));
builder.Services.Configure<DataSyncOptions>(builder.Configuration.GetSection("DataSync"));
builder.Services.Configure<DataSourceOptions>(builder.Configuration.GetSection("DataSource"));
builder.Services.Configure<AuthOptions>(builder.Configuration.GetSection("Auth"));

var app = builder.Build();

app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();

app.MapRazorPages();
app.MapControllers();
app.MapHub<StatusHub>("/hubs/status");
app.MapFallbackToFile("index.html");

app.Run();
```

## Controllers

| Controller | Purpose |
|------------|---------|
| `SearchController` | Submit search, get results, download Excel |
| `LookupController` | Autocomplete APIs for items, work centers, operators |
| `AuthController` | Login/logout against LDAP |

## Hubs

| Hub | Purpose |
|-----|---------|
| `StatusHub` | Pushes search status updates to connected clients |

## Background Services

| Service | Purpose |
|---------|---------|
| `SearchProcessorService` | Polls for queued searches, executes them, generates Excel |
| `DataSyncService` | Runs on schedule, syncs JDE/CMS data to local cache |

Background services use `IServiceScopeFactory` to create scopes for database access, avoiding scoped-in-singleton issues.

## Related Documentation

- [Solution Structure](./SolutionStructure.md)
- [Data Flow](./DataFlow.md)
- [Configuration](./Configuration.md)