using Xunit;
using Npgsql;
using Dapper;
using KArtSell.Modules.IdentityAccess.ManageIdentityAndRoles.Features.RegisterIdentity;
using KArtSell.Modules.IdentityAccess.ManageIdentityAndRoles.Features.RequestMfaSetup;
using KArtSell.Modules.IdentityAccess.ManageIdentityAndRoles.Domain;

namespace KArtSell.IdentityAccess.IntegrationTests.ManageIdentityAndRoles;

[Collection("Database")]
public class RequestMfaSetupIntegrationTests : IAsyncLifetime
{
    private readonly string _connectionString;
    private NpgsqlDataSource _dataSource = null!;
    private RegisterIdentitySql _registerSql = null!;
    private RequestMfaSetupSql _mfaSql = null!;

    public RequestMfaSetupIntegrationTests()
    {
        _connectionString = Environment.GetEnvironmentVariable("KARTSELL_POSTGRES")
            ?? "Host=127.0.0.1;Port=5432;Database=kartselldb;Username=postgres;Password=postgres";
    }

    public async Task InitializeAsync()
    {
        _dataSource = new NpgsqlDataSourceBuilder(_connectionString).Build();
        _registerSql = new RegisterIdentitySql(async () => await _dataSource.OpenConnectionAsync());
        _mfaSql = new RequestMfaSetupSql(async () => await _dataSource.OpenConnectionAsync());

        await CleanupAsync();
    }

    public async Task DisposeAsync()
    {
        await CleanupAsync();
        await _dataSource.DisposeAsync();
    }

    private async Task CleanupAsync()
    {
        using var conn = await _dataSource.OpenConnectionAsync();
        await conn.ExecuteAsync("DELETE FROM identity.identity WHERE email LIKE 'test-mfa-integration-%'");
    }

    [Fact]
    public async Task UpdateIdentityState_ActiveToMfaSetup_Success()
    {
        var email = "test-mfa-integration-001@example.com";
        var displayName = "Test MFA 001";
        var correlationId = Guid.NewGuid().ToString();
        var identityId = Guid.NewGuid();

        await _registerSql.CreateIdentityAsync(identityId, email, displayName, correlationId, CancellationToken.None);
        var (_, _, revision) = await _mfaSql.GetIdentityAsync(identityId, CancellationToken.None);

        await _mfaSql.UpdateIdentityStateAsync(identityId, IdentityState.RequiresMfaSetup, revision, CancellationToken.None);
        var (_, newState, _) = await _mfaSql.GetIdentityAsync(identityId, CancellationToken.None);

        Assert.Equal(IdentityState.RequiresMfaSetup, newState);
    }

    [Fact]
    public async Task UpdateIdentityState_OptimisticConcurrency_FailsOnRevisionMismatch()
    {
        var email = "test-mfa-integration-002@example.com";
        var displayName = "Test MFA 002";
        var correlationId = Guid.NewGuid().ToString();
        var identityId = Guid.NewGuid();

        await _registerSql.CreateIdentityAsync(identityId, email, displayName, correlationId, CancellationToken.None);

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(async () =>
            await _mfaSql.UpdateIdentityStateAsync(identityId, IdentityState.RequiresMfaSetup, 999, CancellationToken.None)
        );

        Assert.Contains("concurrency", ex.Message, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public async Task GetIdentity_AfterCreate_ReturnsCorrectRevision()
    {
        var email = "test-mfa-integration-003@example.com";
        var displayName = "Test MFA 003";
        var correlationId = Guid.NewGuid().ToString();
        var identityId = Guid.NewGuid();

        await _registerSql.CreateIdentityAsync(identityId, email, displayName, correlationId, CancellationToken.None);
        var (_, state, revision) = await _mfaSql.GetIdentityAsync(identityId, CancellationToken.None);

        Assert.Equal(IdentityState.Active, state);
        Assert.Equal(1, revision);
    }

    [Fact]
    public async Task UpdateIdentityState_IncreasesRevision()
    {
        var email = "test-mfa-integration-004@example.com";
        var displayName = "Test MFA 004";
        var correlationId = Guid.NewGuid().ToString();
        var identityId = Guid.NewGuid();

        await _registerSql.CreateIdentityAsync(identityId, email, displayName, correlationId, CancellationToken.None);
        var (_, _, revision1) = await _mfaSql.GetIdentityAsync(identityId, CancellationToken.None);

        await _mfaSql.UpdateIdentityStateAsync(identityId, IdentityState.RequiresMfaSetup, revision1, CancellationToken.None);
        var (_, _, revision2) = await _mfaSql.GetIdentityAsync(identityId, CancellationToken.None);

        Assert.Equal(revision1 + 1, revision2);
    }

    [Fact]
    public async Task GetIdentity_NotFound_ThrowsException()
    {
        var nonExistentId = Guid.NewGuid();

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(async () =>
            await _mfaSql.GetIdentityAsync(nonExistentId, CancellationToken.None)
        );

        Assert.Contains("not found", ex.Message, StringComparison.OrdinalIgnoreCase);
    }
}