Program.cs

using Microsoft.EntityFrameworkCore;
using TaskerAPI.Data;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using TaskerAPI.Services;
using TaskerAPI.Middleware;
using FluentValidation.AspNetCore;
using TaskerAPI.Validators;

var builder = WebApplication.CreateBuilder(args);

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

// Add FluentValidation
builder.Services.AddFluentValidation(fv => 
{
    fv.RegisterValidatorsFromAssemblyContaining<CreateTodoTaskValidator>();
    fv.AutomaticValidationEnabled = true;
});

// Configure DbContext
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseMySql(
        builder.Configuration.GetConnectionString("DefaultConnection"),
        ServerVersion.AutoDetect(builder.Configuration.GetConnectionString("DefaultConnection"))
    ));

// Add JWT Configuration
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidIssuer = builder.Configuration["Jwt:Issuer"],
            ValidAudience = builder.Configuration["Jwt:Audience"],
            IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Key"]))
        };
    });

// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

builder.Services.AddAuthorization(options =>
{
    PolicyService.ConfigurePolicies(options);
});

var app = builder.Build();

// Add this before other middleware
app.UseMiddleware<GlobalExceptionHandler>();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();
app.UseAuthentication();
app.UseAuthorization();
app.MapControllers();

app.Run();