using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using Microsoft.OpenApi.Models;
using System.Reflection;
using System.Text.Json.Serialization;

var builder = WebApplication.CreateBuilder(args);

// 1. Configuración de Servicios

// a. Configurar servicios de controladores
builder.Services.AddControllers()
.ConfigureApiBehaviorOptions(options =>
{
    options.SuppressModelStateInvalidFilter = true; // Desactiva la validación automática del estado del modelo
})
.AddJsonOptions(options =>
{
    options.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
});

// b. Configuración de JWT
var jwtSettings = builder.Configuration.GetSection("Jwt");
var keyString = jwtSettings["Key"];
if (string.IsNullOrEmpty(keyString))
{
    throw new ArgumentNullException("JWT Key is not configured.");
}
var key = Encoding.UTF8.GetBytes(keyString);

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuer = true,
        ValidIssuer = jwtSettings["Issuer"],
        ValidateAudience = true,
        ValidAudience = jwtSettings["Audience"],
        ValidateLifetime = true,
    ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSettings["Key"])),
        ValidAlgorithms = new[] { SecurityAlgorithms.HmacSha256 }
    };

    options.Events = new JwtBearerEvents
    {
        OnAuthenticationFailed = ctx =>
        {
            var logger = ctx.HttpContext.RequestServices.GetRequiredService<ILogger<Program>>();
            logger.LogError("NOMBRE FALLO {0}", ctx.Exception.GetType().Name);
            logger.LogError("MENSAJE FALLO {0}", ctx.Exception.Message);
            return Task.CompletedTask;
        },
    };
});

// d. Configurar Swagger con soporte para JWT
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo { Title = "SwaggerCamcue API", Version = "v1" });

    // Definir el esquema de seguridad JWT
    var securityScheme = new OpenApiSecurityScheme
    {
        Name = "Authorization",
        Description = "Ingrese 'Bearer' seguido de su token en el campo de texto.\n\nEjemplo: 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6...'",
        In = ParameterLocation.Header,
        Type = SecuritySchemeType.Http,
        Scheme = "Bearer",
        BearerFormat = "JWT"
    };

    c.AddSecurityDefinition("Bearer", securityScheme);


    c.AddSecurityRequirement(new OpenApiSecurityRequirement
    {
        {
            new OpenApiSecurityScheme
            {
                Reference = new OpenApiReference
                {
                    Type = ReferenceType.SecurityScheme,
                    Id = "Bearer"
                }
            },
            Array.Empty<string>()
        }
    });
});

var app = builder.Build();

// 2. Configuración del Pipeline HTTP

// b. Habilitar Swagger solo en Desarrollo
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint("/swagger/v1/swagger.json", "SwaggerCamcue API V1");
        c.RoutePrefix = string.Empty; // Swagger en la raíz
    });
}

app.UseCors(policy =>
{
    policy.AllowAnyOrigin()
          .AllowAnyMethod()
          .AllowAnyHeader();
});


//app.UseHttpsRedirection();
// d. Autenticación y Autorización
app.UseAuthentication();
app.UseAuthorization();

// e. Mapear Controladores
app.MapControllers();

// f. Ejecutar la Aplicación
app.Run();