using NSubstitute;
using PnvPanel.Application.Admin.Users;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Plans;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Plans;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Users;

public class AdminSetUserPlanCommandHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();

    private static CurrentUserProfile Profile(Guid userId, string role, int configQuota) =>
        new(
            userId,
            "alice",
            Guid.NewGuid(),
            role,
            IsActivated: true,
            IsBlocked: false,
            ConfigQuota: configQuota,
            PlanId: null,
            MaxIpLimit: 2,
            SubscriptionToken: "sub-token",
            BillingEnabled: false,
            BillingPaidUntil: null,
            BillingSuspended: false
        );

    [Fact]
    public async Task Handle_WhenUnlimitedForNonAdmin_ReturnsUnlimitedOnlyForAdmin()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Profile(userId, "user", 3));

        var handler = new AdminSetUserPlanCommandHandler(
            dbContext,
            _identityService,
            FakeCurrentUser.Authenticated(Guid.NewGuid())
        );

        var result = await handler.Handle(
            new AdminSetUserPlanCommand(userId, null, RoleQuota.Unlimited),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(PlanErrors.UnlimitedOnlyForAdmin, result.Error);
        await _identityService
            .DidNotReceive()
            .SetConfigQuotaAsync(Arg.Any<Guid>(), Arg.Any<int>(), Arg.Any<Guid?>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenUnlimitedForAdmin_Succeeds()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        _identityService
            .GetProfileAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Profile(userId, "admin", -1));
        _identityService
            .SetConfigQuotaAsync(userId, RoleQuota.Unlimited, null, Arg.Any<CancellationToken>())
            .Returns(Result.Success());

        var handler = new AdminSetUserPlanCommandHandler(
            dbContext,
            _identityService,
            FakeCurrentUser.Authenticated(Guid.NewGuid())
        );

        var result = await handler.Handle(
            new AdminSetUserPlanCommand(userId, null, RoleQuota.Unlimited),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        await _identityService
            .Received(1)
            .SetConfigQuotaAsync(userId, RoleQuota.Unlimited, null, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WithPlanId_UsesPlanConfigCount()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var plan = Plan.Create("Плюс", 6, 0);
        dbContext.Plans.Add(plan);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .SetConfigQuotaAsync(userId, 6, plan.Id, Arg.Any<CancellationToken>())
            .Returns(Result.Success());

        var handler = new AdminSetUserPlanCommandHandler(
            dbContext,
            _identityService,
            FakeCurrentUser.Authenticated(Guid.NewGuid())
        );

        var result = await handler.Handle(
            new AdminSetUserPlanCommand(userId, plan.Id, null),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        await _identityService
            .Received(1)
            .SetConfigQuotaAsync(userId, 6, plan.Id, Arg.Any<CancellationToken>());
        Assert.Single(dbContext.AuditLogs.Local);
    }

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

        var handler = new AdminSetUserPlanCommandHandler(
            dbContext,
            _identityService,
            FakeCurrentUser.Authenticated(Guid.NewGuid())
        );

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

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