using PnvPanel.Application.Admin.Maintenance;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Configs;
using PnvPanel.Domain.Inbounds;
using PnvPanel.Domain.Nodes;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Maintenance;

public class DeleteConfigsCommandHandlerTests
{
    private static Node CreateNode() =>
        Node.Register(
            "node-1",
            new Uri("https://node-1.example.com"),
            new NodeCredentials("admin", "protected"),
            null
        );

    private static VpnConfig CreateConfig(Guid inboundId) =>
        VpnConfig.Create(Guid.NewGuid(), inboundId, VpnProtocol.Vless, null);

    [Fact]
    public async Task DeleteRevoked_DeletesRevokedConfigsAndTheirTraffic_KeepsOthers()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var node = CreateNode();
        var inbound = Inbound.FromRemote(node.Id, "1", VpnProtocol.Vless, "remark", 443);
        var revoked = CreateConfig(inbound.Id);
        revoked.Revoke();
        var active = CreateConfig(inbound.Id);

        dbContext.Nodes.Add(node);
        dbContext.Inbounds.Add(inbound);
        dbContext.VpnConfigs.AddRange(revoked, active);
        dbContext.TrafficSamples.AddRange(
            TrafficSample.Create(revoked.Id, DateTimeOffset.UtcNow, 1, 2),
            TrafficSample.Create(active.Id, DateTimeOffset.UtcNow, 3, 4)
        );
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new DeleteRevokedConfigsCommandHandler(
            dbContext,
            FakeCurrentUser.Authenticated(Guid.NewGuid(), "admin")
        );

        var result = await handler.Handle(new DeleteRevokedConfigsCommand(), CancellationToken.None);
        // Хендлер не коммитит сам (в проде это делает UnitOfWorkBehavior после диспетчера) — коммитим явно.
        await dbContext.SaveChangesAsync(CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal(1, result.Value);
        Assert.Equal([active.Id], dbContext.VpnConfigs.Select(c => c.Id).ToList());
        Assert.Equal([active.Id], dbContext.TrafficSamples.Select(s => s.ConfigId).ToList());
    }

    [Fact]
    public async Task DeleteOrphaned_DeletesConfigsWithoutInboundOrNode_KeepsLiveOnes()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var node = CreateNode();
        var liveInbound = Inbound.FromRemote(node.Id, "1", VpnProtocol.Vless, "live", 443);
        // Инбаунд, чья нода удалена.
        var orphanInbound = Inbound.FromRemote(Guid.NewGuid(), "2", VpnProtocol.Vless, "orphan", 444);

        var live = CreateConfig(liveInbound.Id);
        var onDeletedNode = CreateConfig(orphanInbound.Id);
        var onDeletedInbound = CreateConfig(Guid.NewGuid());

        dbContext.Nodes.Add(node);
        dbContext.Inbounds.AddRange(liveInbound, orphanInbound);
        dbContext.VpnConfigs.AddRange(live, onDeletedNode, onDeletedInbound);
        dbContext.TrafficSamples.Add(
            TrafficSample.Create(onDeletedInbound.Id, DateTimeOffset.UtcNow, 1, 2)
        );
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new DeleteOrphanedConfigsCommandHandler(
            dbContext,
            FakeCurrentUser.Authenticated(Guid.NewGuid(), "admin")
        );

        var result = await handler.Handle(new DeleteOrphanedConfigsCommand(), CancellationToken.None);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal(2, result.Value);
        Assert.Equal([live.Id], dbContext.VpnConfigs.Select(c => c.Id).ToList());
        Assert.Empty(dbContext.TrafficSamples);
    }

    [Fact]
    public async Task DeleteOrphaned_WhenNothingToDelete_ReturnsZero()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var node = CreateNode();
        var inbound = Inbound.FromRemote(node.Id, "1", VpnProtocol.Vless, "live", 443);
        dbContext.Nodes.Add(node);
        dbContext.Inbounds.Add(inbound);
        dbContext.VpnConfigs.Add(CreateConfig(inbound.Id));
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new DeleteOrphanedConfigsCommandHandler(
            dbContext,
            FakeCurrentUser.Authenticated(Guid.NewGuid(), "admin")
        );

        var result = await handler.Handle(new DeleteOrphanedConfigsCommand(), CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal(0, result.Value);
        Assert.Single(dbContext.VpnConfigs);
    }
}