using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Diagnostics;
using Microsoft.EntityFrameworkCore.InMemory;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using LittleShop.Data;
using LittleShop.Services;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Moq;
using System.Linq;
using Microsoft.AspNetCore.Authentication;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;
using System.Collections.Generic;
using System.Security.Claims;
using System.Text.Encodings.Web;
using System.Threading.Tasks;

namespace LittleShop.Tests.Infrastructure;

public class TestWebApplicationFactory : WebApplicationFactory<Program>
{
    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureServices(services =>
        {
            // Remove the existing DbContext registration
            var contextDescriptor = services.SingleOrDefault(d => d.ServiceType == typeof(LittleShopContext));
            if (contextDescriptor != null)
                services.Remove(contextDescriptor);

            var optionsDescriptor = services.SingleOrDefault(d => d.ServiceType == typeof(DbContextOptions<LittleShopContext>));
            if (optionsDescriptor != null)
                services.Remove(optionsDescriptor);

            // Add InMemory database for testing with unique name per test run
            var databaseName = $"InMemoryDbForTesting_{Guid.NewGuid()}";
            services.AddDbContext<LittleShopContext>(options =>
                options.UseInMemoryDatabase(databaseName)
                       .ConfigureWarnings(warnings => warnings.Default(WarningBehavior.Ignore)));

            // Add test configuration
            var configuration = new ConfigurationBuilder()
                .AddInMemoryCollection(new Dictionary<string, string>
                {
                    {"ConnectionStrings:DefaultConnection", $"Data Source={databaseName}.db"},
                    {"Jwt:Key", "test-key-that-is-at-least-32-characters-long-for-security"},
                    {"Jwt:Issuer", "LittleShop"},
                    {"Jwt:Audience", "LittleShop"},
                    {"SilverPay:BaseUrl", "http://test.example.com"},
                    {"SilverPay:ApiKey", "test-api-key"},
                    {"CORS:AllowedOrigins:0", "http://localhost:3000"}
                })
                .Build();

            services.AddSingleton<IConfiguration>(configuration);

            // Add test authentication
            services.AddAuthentication("Test")
                .AddScheme<AuthenticationSchemeOptions, TestAuthenticationHandler>("Test", options => { });

            // Mock external services that might cause issues in tests
            services.Replace(ServiceDescriptor.Scoped<IPushNotificationService>(_ => Mock.Of<IPushNotificationService>()));
            services.Replace(ServiceDescriptor.Scoped<ITelegramBotManagerService>(_ => Mock.Of<ITelegramBotManagerService>()));
            services.Replace(ServiceDescriptor.Scoped<ISilverPayService>(_ => Mock.Of<ISilverPayService>()));
            services.Replace(ServiceDescriptor.Scoped<IRoyalMailService>(_ => Mock.Of<IRoyalMailService>()));
            services.Replace(ServiceDescriptor.Scoped<ITeleBotMessagingService>(_ => Mock.Of<ITeleBotMessagingService>()));
            services.Replace(ServiceDescriptor.Scoped<IMessageDeliveryService>(_ => Mock.Of<IMessageDeliveryService>()));

            // Keep real implementations for business logic services
            services.TryAddScoped<IAuthService, AuthService>();
            services.TryAddScoped<ICategoryService, CategoryService>();
            services.TryAddScoped<IProductService, ProductService>();
            services.TryAddScoped<IOrderService, OrderService>();
            services.TryAddScoped<IReviewService, ReviewService>();
            services.TryAddScoped<ICustomerService, CustomerService>();
            services.TryAddScoped<ISystemSettingsService, SystemSettingsService>();
            services.TryAddScoped<IVariantCollectionService, VariantCollectionService>();
            services.TryAddScoped<IShippingRateService, ShippingRateService>();
            services.TryAddScoped<IBotService, BotService>();
            services.TryAddScoped<IBotMetricsService, BotMetricsService>();
            services.TryAddScoped<IBotContactService, BotContactService>();
            services.TryAddScoped<ICustomerMessageService, CustomerMessageService>();
            services.TryAddScoped<IBotActivityService, BotActivityService>();
            services.TryAddScoped<IProductImportService, ProductImportService>();
            services.TryAddScoped<ICryptoPaymentService, CryptoPaymentService>();
            services.TryAddScoped<IDataSeederService, DataSeederService>();

            // Add validation service
            services.TryAddSingleton<ConfigurationValidationService>();

            // Build service provider
            var sp = services.BuildServiceProvider();

            // Create scope for database initialization
            using (var scope = sp.CreateScope())
            {
                var scopedServices = scope.ServiceProvider;
                var db = scopedServices.GetRequiredService<LittleShopContext>();
                var logger = scopedServices.GetRequiredService<ILogger<TestWebApplicationFactory>>();

                // Ensure database is created
                db.Database.EnsureCreated();

                try
                {
                    // Seed test data if needed
                    SeedTestData(db);
                }
                catch (Exception ex)
                {
                    logger.LogError(ex, "An error occurred seeding the database with test data.");
                }
            }
        });

        builder.UseEnvironment("Testing");
    }

    private static void SeedTestData(LittleShopContext context)
    {
        // Seed test data will be added as needed for specific tests
        context.SaveChanges();
    }
}

public class TestAuthenticationHandler : AuthenticationHandler<AuthenticationSchemeOptions>
{
    public TestAuthenticationHandler(IOptionsMonitor<AuthenticationSchemeOptions> options,
        ILoggerFactory logger, UrlEncoder encoder)
        : base(options, logger, encoder)
    {
    }

    protected override Task<AuthenticateResult> HandleAuthenticateAsync()
    {
        var claims = new[]
        {
            new Claim(ClaimTypes.Name, "TestUser"),
            new Claim(ClaimTypes.NameIdentifier, "123"),
            new Claim(ClaimTypes.Role, "Admin")
        };

        var identity = new ClaimsIdentity(claims, "Test");
        var principal = new ClaimsPrincipal(identity);
        var ticket = new AuthenticationTicket(principal, "Test");

        return Task.FromResult(AuthenticateResult.Success(ticket));
    }
}