using Elternbeirat.Web.Components;
using Elternbeirat.Web.Features.Events;
using Elternbeirat.Web.Services;
using Microsoft.AspNetCore.HttpOverrides;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorComponents();

// Content is read once at startup and cached -> singletons.
builder.Services.AddSingleton<PageService>();
builder.Services.AddSingleton<PostService>();
builder.Services.AddSingleton<EventService>();

var app = builder.Build();

// NPM terminates TLS and is the only way to reach the container (no port
// mapping in production). Without UseForwardedHeaders the app sees every request
// as HTTP and with the proxy IP instead of the client IP.
// KnownNetworks/KnownProxies are deliberately empty because only NPM reaches
// the container.
app.UseForwardedHeaders(new ForwardedHeadersOptions
{
    ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto,
    KnownIPNetworks = { },
    KnownProxies = { }
});

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error", createScopeForErrors: true);
    // No UseHsts() and no UseHttpsRedirection(): NPM sets HSTS and terminates
    // TLS. Both here would create a redirect loop behind the proxy.
}

app.UseStatusCodePagesWithReExecute("/not-found", createScopeForStatusCodePages: true);

app.UseAntiforgery();

app.MapStaticAssets();
app.MapRazorComponents<App>();

// Subscribable calendar feed of all events. A minimal API endpoint rather than
// a Razor page because it returns text/calendar, not HTML.
app.MapGet("/termine.ics", (EventService events) =>
    Results.Text(IcsCalendar.Build(events.All), "text/calendar; charset=utf-8"));

app.Run();