using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Npgsql;
using Tiku.Application.Commerce;
using Tiku.Application.Auth;
using Tiku.Application.Growth;
using Tiku.Application.Storage;
using Tiku.Application.Security;
using Tiku.Application.Tenancy;
using Tiku.Api;
using Tiku.Domain.Identity;
using Tiku.Domain.QuestionBanks;
using Tiku.Domain.Content;
using Tiku.Domain.Tenancy;
using Tiku.IntegrationTests.Infrastructure;
using Tiku.Infrastructure.Persistence;

namespace Tiku.IntegrationTests.Api;

public sealed class ApiTestFactory(
    IWechatOAuthClient? wechatOAuthClient = null,
    IObjectStorageService? objectStorageService = null,
    IReferralQrcodeGenerator? referralQrcodeGenerator = null,
    IPaymentProviderGateway? paymentProviderGateway = null,
    IDomainOwnershipVerifier? domainOwnershipVerifier = null,
    IDomainGatewayProvisioner? domainGatewayProvisioner = null) : WebApplicationFactory<ApiProgramMarker>
{
    private readonly PostgresTestDatabase database = PostgresTestDatabase.Create();

    protected override void ConfigureWebHost(Microsoft.AspNetCore.Hosting.IWebHostBuilder builder)
    {
        builder.ConfigureServices(services =>
        {
            foreach (var descriptor in services
                         .Where(descriptor =>
                             descriptor.ServiceType == typeof(NpgsqlDataSource) ||
                             descriptor.ServiceType == typeof(TenantIsolationSaveChangesInterceptor) ||
                             descriptor.ServiceType == typeof(DbContextOptions<TikuDbContext>) ||
                             descriptor.ServiceType.FullName?.Contains(nameof(TikuDbContext), StringComparison.Ordinal) == true)
                         .ToArray())
            {
                services.Remove(descriptor);
            }

            services.AddSingleton(_ => NpgsqlDataSource.Create(database.ConnectionString));
            services.AddScoped<TenantIsolationSaveChangesInterceptor>();
            services.AddDbContext<TikuDbContext>((serviceProvider, options) =>
            {
                var dataSource = serviceProvider.GetRequiredService<NpgsqlDataSource>();
                options.UseNpgsql(dataSource, npgsql =>
                    npgsql.MigrationsAssembly(typeof(TikuDbContext).Assembly.FullName));
                options.AddInterceptors(serviceProvider.GetRequiredService<TenantIsolationSaveChangesInterceptor>());
            });

            if (wechatOAuthClient is not null)
            {
                services.AddSingleton(wechatOAuthClient);
            }

            if (objectStorageService is not null)
            {
                services.AddSingleton(objectStorageService);
            }

            if (referralQrcodeGenerator is not null)
            {
                services.AddSingleton(referralQrcodeGenerator);
            }

            if (paymentProviderGateway is not null)
            {
                services.AddSingleton(paymentProviderGateway);
            }

            if (domainOwnershipVerifier is not null)
            {
                services.RemoveAll<IDomainOwnershipVerifier>();
                services.AddSingleton(domainOwnershipVerifier);
            }

            if (domainGatewayProvisioner is not null)
            {
                services.RemoveAll<IDomainGatewayProvisioner>();
                services.AddSingleton(domainGatewayProvisioner);
            }
        });
    }

    public async Task SeedAsync(params object[] entities)
    {
        using var scope = Services.CreateScope();
        scope.ServiceProvider.GetRequiredService<ITenantContextInitializer>()
            .InitializeSystem(null, "Integration test fixture seeding");
        var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
        dbContext.AddRange(entities);
        await dbContext.SaveChangesAsync();
    }

    public IServiceScope CreateSystemScope(string reason = "Integration test verification")
    {
        var scope = Services.CreateScope();
        scope.ServiceProvider.GetRequiredService<ITenantContextInitializer>()
            .InitializeSystem(null, reason);
        return scope;
    }

    public IServiceScope CreateTenantScope(Guid tenantId, string? tenantCode = null)
    {
        var scope = Services.CreateScope();
        scope.ServiceProvider.GetRequiredService<ITenantContextInitializer>()
            .Initialize(tenantId, tenantCode, TenantResolutionSource.TenantCode);
        return scope;
    }

    public async Task SeedQuestionWithVersionAsync(Question question, QuestionVersion version)
    {
        question.CurrentVersionId = null;
        await SeedAsync(question);
        await SeedAsync(version);

        using var scope = Services.CreateScope();
        scope.ServiceProvider.GetRequiredService<ITenantContextInitializer>()
            .InitializeSystem(question.TenantId, "Integration test question version linking");
        var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
        var persistedQuestion = await dbContext.Questions.SingleAsync(item =>
            item.TenantId == question.TenantId && item.Id == question.Id);
        persistedQuestion.CurrentVersionId = version.Id;
        await dbContext.SaveChangesAsync();
    }

    public async Task<TenantQuestionReference> SeedQuestionReferenceAsync(
        Guid tenantId,
        Guid questionOwnerTenantId,
        Guid questionId,
        QuestionSource source = QuestionSource.Tenant)
    {
        var reference = new TenantQuestionReference
        {
            Id = Guid.NewGuid(),
            TenantId = tenantId,
            QuestionOwnerTenantId = questionOwnerTenantId,
            QuestionId = questionId,
            Source = source
        };
        await SeedAsync(reference);
        return reference;
    }

    public async Task<Guid> SeedActiveSessionAsync(
        Guid userId,
        Guid? tenantId = null,
        string tokenHash = "integration-test-token-hash")
    {
        var resolvedTenantId = tenantId ?? Guid.NewGuid();
        await SeedAsync(
            new Tenant
            {
                Id = resolvedTenantId,
                Slug = resolvedTenantId.ToString("N"),
                Name = "Test Tenant"
            },
            new User
            {
                Id = userId,
                Phone = "13800000000"
            },
            new AuthSession
            {
                Id = Guid.NewGuid(),
                TenantId = resolvedTenantId,
                UserId = userId,
                TokenHash = tokenHash,
                Provider = "test",
                ExpiresAt = DateTimeOffset.UtcNow.AddHours(1)
            });

        using var scope = Services.CreateScope();
        scope.ServiceProvider.GetRequiredService<ITenantContextInitializer>()
            .InitializeSystem(resolvedTenantId, "Integration test session lookup");
        var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
        return await dbContext.AuthSessions
            .Where(session => session.UserId == userId)
            .Select(session => session.Id)
            .SingleAsync();
    }

    protected override void Dispose(bool disposing)
    {
        base.Dispose(disposing);
        if (disposing)
        {
            database.Dispose();
        }
    }
}