ResourceUsageAPI/Startup .cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.AspNetCore.Http;
using ResourceMonitorService.Hubs;
using Microsoft.OpenApi.Models;

namespace ResourceMonitorService
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            // Add MVC services
            services.AddControllers()
                .AddNewtonsoftJson(); // For JSON serialization

            // Add SignalR for real-time updates
            services.AddSignalR();

            // Add CORS for API access
            services.AddCors(options =>
            {
                options.AddPolicy("AllowAll", builder =>
                {
                    builder.AllowAnyOrigin()
                           .AllowAnyMethod()
                           .AllowAnyHeader();
                });
            });

            // Add Swagger for API documentation
            services.AddEndpointsApiExplorer();
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "Resource Monitor API", Version = "v1" });
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseSwagger();
                app.UseSwaggerUI(c =>
                {
                    c.SwaggerEndpoint("/swagger/v1/swagger.json", "Resource Monitor API V1");
                });
            }

            // Serve static files (CSS, JS, images)
            app.UseStaticFiles();

            app.UseRouting();
            app.UseCors("AllowAll");

            app.UseEndpoints(endpoints =>
            {
                // Map API controllers
                endpoints.MapControllers();
                
                // Map SignalR hub
                endpoints.MapHub<ResourceHub>("/resourceHub");

                // Default route to index.html
                endpoints.MapFallbackToFile("index.html");
            });
        }
    }
}