using NSubstitute;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Configs;
using PnvPanel.Application.Configs.Revoke;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Configs;
using PnvPanel.Domain.Inbounds;
using PnvPanel.Domain.Nodes;
using Xunit;

namespace PnvPanel.Application.Tests.Configs.Revoke;

public class RevokeVpnConfigCommandHandlerTests
{
    private readonly IXuiPanelGateway _gateway = Substitute.For<IXuiPanelGateway>();
    private readonly IRealtimeNotifier _notifier = Substitute.For<IRealtimeNotifier>();

    [Fact]
    public async Task Handle_WhenActiveConfigOwnedByUser_RevokesRemovesRemoteClientAndNotifies()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();

        var node = Node.Register("node-1", new Uri("https://node1.example.com"), new NodeCredentials("admin", "protected"), null);
        var inbound = Inbound.FromRemote(node.Id, "1", VpnProtocol.Vless, "remark", 443);
        var config = VpnConfig.Create(userId, inbound.Id, VpnProtocol.Vless, null, 0);
        config.AssignRemoteClient("external-id");

        dbContext.Nodes.Add(node);
        dbContext.Inbounds.Add(inbound);
        dbContext.VpnConfigs.Add(config);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new RevokeVpnConfigCommandHandler(dbContext, _gateway, _notifier, FakeCurrentUser.Authenticated(userId));

        var result = await handler.Handle(new RevokeVpnConfigCommand(config.Id), CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal(ConfigStatus.Revoked, config.Status);
        await _gateway.Received(1).RemoveClientAsync(
            Arg.Any<Node>(), inbound.RemoteInboundId, "external-id", config.Protocol, Arg.Any<CancellationToken>());
        await _notifier.Received(1).NotifyConfigStatusChangedAsync(userId, config.Id, ConfigStatus.Revoked, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenAlreadyRevoked_IsIdempotentAndDoesNotCallGateway()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();

        var inbound = Inbound.FromRemote(Guid.NewGuid(), "1", VpnProtocol.Vless, "remark", 443);
        var config = VpnConfig.Create(userId, inbound.Id, VpnProtocol.Vless, null, 0);
        config.Revoke();

        dbContext.Inbounds.Add(inbound);
        dbContext.VpnConfigs.Add(config);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new RevokeVpnConfigCommandHandler(dbContext, _gateway, _notifier, FakeCurrentUser.Authenticated(userId));

        var result = await handler.Handle(new RevokeVpnConfigCommand(config.Id), CancellationToken.None);

        Assert.True(result.IsSuccess);
        await _gateway.DidNotReceive().RemoveClientAsync(
            Arg.Any<PnvPanel.Domain.Nodes.Node>(), Arg.Any<string>(), Arg.Any<string>(), Arg.Any<VpnProtocol>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenConfigNotFound_ReturnsNotFound()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();

        var handler = new RevokeVpnConfigCommandHandler(dbContext, _gateway, _notifier, FakeCurrentUser.Authenticated(userId));

        var result = await handler.Handle(new RevokeVpnConfigCommand(Guid.NewGuid()), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(ConfigErrors.NotFound, result.Error);
    }

    [Fact]
    public async Task Handle_WhenNotAuthenticated_ReturnsUnauthorized()
    {
        using var dbContext = InMemoryDbContextFactory.Create();

        var handler = new RevokeVpnConfigCommandHandler(dbContext, _gateway, _notifier, FakeCurrentUser.Anonymous());

        var result = await handler.Handle(new RevokeVpnConfigCommand(Guid.NewGuid()), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(PnvPanel.Application.Auth.AuthErrors.Unauthorized, result.Error);
    }
}