using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using SQLInsight.Agent;
using SQLInsight.Agent.Hub;
using SQLInsight.Agent.Monitoring;
using SQLInsight.Collectors;
using SQLInsight.Connectivity;
using SQLInsight.Contracts;
using SQLInsight.Hub.Data;
using SQLInsight.Repository;
using SQLInsight.Rules;
using SQLInsight.Rules.Engine;

namespace SQLInsight.IntegrationTests;

/// <summary>
/// The whole paid path: agent monitors real SQL Server, queues its state, delivers it to the hub, hub stores it in PostgreSQL.
/// </summary>
[Collection(SqlServerTestGroup.Name)]
[Trait("Category", "Integration")]
public class HubEndToEndTests(SqlServerFixture sql, HubFixture hub) : IClassFixture<HubFixture>, IAsyncLifetime
{
    private readonly string _database = "SQLInsightE2E_" + Guid.NewGuid().ToString("N")[..8];
    private InsightRepository _repository = null!;

    public async Task InitializeAsync()
    {
        await sql.ExecuteAsSaAsync($"CREATE DATABASE [{_database}];");
        _repository = new InsightRepository(sql.DatabaseConnectionString(_database));
        await _repository.MigrateAsync();
    }

    public Task DisposeAsync() => sql.ExecuteAsSaAsync($"ALTER DATABASE [{_database}] SET SINGLE_USER WITH ROLLBACK IMMEDIATE; DROP DATABASE [{_database}];");

    private sealed class TestServerClients(Func<HttpClient> create) : IHttpClientFactory
    {
        public HttpClient CreateClient(string name) => create();
    }

    [Fact]
    public async Task Agent_state_reaches_the_hub_with_sensitive_evidence_redacted()
    {
        var options = Options.Create(new HubOptions { Enabled = true, Url = new Uri("http://localhost/"), License = hub.License("E2E A/S") });
        options.Value.TrustedKeys[HubFixture.KeyId] = hub.PublicKey;
        var outbox = new HubOutbox(options, _repository);
        var monitor = new InstanceMonitor(
            new MonitoredInstance
            {
                Name = "e2e-sql01", Server = sql.Server, Authentication = AuthenticationMode.SqlLogin, UserName = SqlServerFixture.AgentLogin,
                Password = SqlServerFixture.AgentPassword, Provider = ConnectionProvider.SqlClient, TrustServerCertificate = true,
            },
            BuiltInCollectors.Create(), new Dictionary<string, TimeSpan>(), new SqlConnectionFactory(), new RuleEngine(BuiltInRules.Create()),
            _repository, NullLogger.Instance, hubOutbox: outbox);
        var sync = new HubSyncService(options, _repository, new TestServerClients(() => hub.Factory.CreateClient()), TimeProvider.System, NullLogger<HubSyncService>.Instance);

        await monitor.RunCycleAsync(DateTimeOffset.UtcNow, CancellationToken.None);
        var sent = await sync.RunOnceAsync(CancellationToken.None);

        Assert.Equal(1, sent);
        var status = await _repository.GetHubStatusAsync();
        Assert.Equal("Valid", status!.LicenseState);
        Assert.Equal(0, status.Pending);
        Assert.NotNull(status.LastSentAt);

        await using var scope = hub.Factory.Services.CreateAsyncScope();
        var db = scope.ServiceProvider.GetRequiredService<HubDbContext>();
        var instance = await db.Instances.Include(i => i.Customer).SingleAsync(i => i.InstanceKey == "e2e-sql01");
        Assert.Equal("E2E A/S", instance.Customer!.Name);
        Assert.Null(instance.ServerName); // not sent by default
        var findings = await db.Findings.Where(f => f.InstanceId == instance.Id && f.ResolvedAt == null).ToListAsync();
        Assert.Contains(findings, f => f.RuleId == "SQLI-CFG-001");
        Assert.True(await db.RuleStates.CountAsync(r => r.InstanceId == instance.Id) >= BuiltInRules.Create().Count);

        var latest = Assert.Single(await _repository.GetLatestSubmissionsAsync());
        Assert.Equal("e2e-sql01", latest.InstanceName);
        Assert.NotNull(latest.SentAt);
    }

    [Fact]
    public async Task Rejected_license_is_given_up_not_retried_forever()
    {
        var community = hub.License("Nope A/S", SQLInsight.Licensing.LicensePlan.Professional, expires: DateTimeOffset.UtcNow.AddDays(-45));
        var options = Options.Create(new HubOptions { Enabled = true, Url = new Uri("http://localhost/"), License = community });
        options.Value.TrustedKeys[HubFixture.KeyId] = hub.PublicKey;
        await _repository.EnqueueSubmissionAsync("x", Guid.NewGuid(), "{}", DateTimeOffset.UtcNow);
        var sync = new HubSyncService(options, _repository, new TestServerClients(() => hub.Factory.CreateClient()), TimeProvider.System, NullLogger<HubSyncService>.Instance);

        // Locally the agent sees the license is long expired and does not even try.
        Assert.Equal(0, await sync.RunOnceAsync(CancellationToken.None));
        Assert.Equal("Expired", (await _repository.GetHubStatusAsync())!.LicenseState);
    }
}