using EntKube.Identity.Domain;
using FluentAssertions;

namespace EntKube.Identity.Tests.Domain;

public class EnvironmentTests
{
    [Fact]
    public void Create_WithValidInputs_CreatesActiveEnvironment()
    {
        // Arrange — A tenant admin creates a new environment (e.g. "dev")
        // for their organization. The environment starts in an Active state
        // and is ready to have clusters assigned to it.

        Guid tenantId = Guid.NewGuid();

        // Act

        TenantEnvironment env = TenantEnvironment.Create(tenantId, "Development", "dev");

        // Assert — The environment should be active and linked to its tenant.

        env.Id.Should().NotBe(Guid.Empty);
        env.TenantId.Should().Be(tenantId);
        env.Name.Should().Be("Development");
        env.Slug.Should().Be("dev");
        env.Status.Should().Be(EnvironmentStatus.Active);
        env.CreatedAt.Should().BeCloseTo(DateTimeOffset.UtcNow, TimeSpan.FromSeconds(5));
    }

    [Fact]
    public void Create_NormalizesSlugToLowerCase()
    {
        // Arrange & Act — Slugs should always be lowercase for consistent lookups.

        TenantEnvironment env = TenantEnvironment.Create(Guid.NewGuid(), "Production", "PROD");

        // Assert

        env.Slug.Should().Be("prod");
    }

    [Fact]
    public void Create_WithEmptyName_ThrowsArgumentException()
    {
        // Arrange & Act

        Action act = () => TenantEnvironment.Create(Guid.NewGuid(), "", "dev");

        // Assert

        act.Should().Throw<ArgumentException>()
            .WithParameterName("name");
    }

    [Fact]
    public void Create_WithEmptySlug_ThrowsArgumentException()
    {
        // Arrange & Act

        Action act = () => TenantEnvironment.Create(Guid.NewGuid(), "Development", "");

        // Assert

        act.Should().Throw<ArgumentException>()
            .WithParameterName("slug");
    }

    [Fact]
    public void Create_WithEmptyTenantId_ThrowsArgumentException()
    {
        // Arrange & Act — Every environment must belong to a tenant.

        Action act = () => TenantEnvironment.Create(Guid.Empty, "Development", "dev");

        // Assert

        act.Should().Throw<ArgumentException>()
            .WithParameterName("tenantId");
    }

    [Fact]
    public void Deactivate_SetsStatusToInactive()
    {
        // Arrange — An active environment that the admin wants to disable
        // (e.g. decommissioning a staging environment).

        TenantEnvironment env = TenantEnvironment.Create(Guid.NewGuid(), "Staging", "staging");

        // Act

        env.Deactivate();

        // Assert

        env.Status.Should().Be(EnvironmentStatus.Inactive);
    }

    [Fact]
    public void Activate_SetsStatusToActive()
    {
        // Arrange — A previously deactivated environment being re-enabled.

        TenantEnvironment env = TenantEnvironment.Create(Guid.NewGuid(), "Staging", "staging");
        env.Deactivate();

        // Act

        env.Activate();

        // Assert

        env.Status.Should().Be(EnvironmentStatus.Active);
    }
}