using System.Reflection;
using ControlCenter.Data;
using ControlCenter.Hubs;
using ControlCenter.Repositories;
using ControlCenter.Services;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

// ── API Services ───────────────────────────────────────────
builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new()
    {
        Title = "Control Center API",
        Version = "v1",
        Description = "OpenClaw Control Center — Command Hub backend with SignalR real-time updates"
    });

    // Include XML doc comments in Swagger output
    var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
    var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
    if (File.Exists(xmlPath))
    {
        c.IncludeXmlComments(xmlPath);
    }
});

// ── Database ────────────────────────────────────────────────
// PostgreSQL via EF Core with Npgsql.
// Connection string from appsettings.json or environment variable.
builder.Services.AddDbContext<ControlCenterDbContext>(options =>
    options.UseNpgsql(
        builder.Configuration.GetConnectionString("ControlCenterDb")
            ?? throw new InvalidOperationException(
                "Connection string 'ControlCenterDb' not found. " +
                "Add it to appsettings.json or set the environment variable.")));

// ── Repositories ────────────────────────────────────────────
builder.Services.AddScoped<IAgentStateRepository, AgentStateRepository>();

// ── CORS (kiosk + remote browser) ─────────────────────────
// The Control Center frontend runs on a different origin than the backend.
// SignalR requires credentials for WebSocket transport, so we use
// specific origins rather than AllowAnyOrigin.
var corsOrigins = builder.Configuration.GetSection("Cors:AllowedOrigins")
    .Get<string[]>() ?? new[] { "http://localhost:4200", "http://localhost:5000" };

builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(policy =>
    {
        policy.WithOrigins(corsOrigins)
              .AllowAnyMethod()
              .AllowAnyHeader()
              .AllowCredentials(); // Required for SignalR WebSocket
    });
});

// ── SignalR (real-time agent status updates) ───────────────
builder.Services.AddSignalR();

// ── Gateway Bridge Service ────────────────────────────────
// Background service that connects to the OpenClaw Gateway WebSocket
// and bridges events to the AgentStatus SignalR hub.
builder.Services.AddSingleton<GatewayEventBridgeService>();
builder.Services.AddHostedService(sp => sp.GetRequiredService<GatewayEventBridgeService>());

var app = builder.Build();

// ── Middleware ──────────────────────────────────────────────
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseCors();
app.UseAuthorization();
app.MapControllers();

// ── Hub Endpoints ───────────────────────────────────────────
// Agent status hub at /hubs/agent-status (matches the design spec)
app.MapHub<AgentStatusHub>("/hubs/agent-status");

app.Run();