using EntKube.Provisioning.Domain;
using FluentAssertions;

namespace EntKube.Provisioning.Tests.Domain;

public class AppEnvironmentTests
{
    // ─── ConfigureDeployment ─────────────────────────────────────────────

    [Fact]
    public void ConfigureDeployment_WithValidSpec_SetsDeploymentSpec()
    {
        // Arrange — After adding an environment, the admin configures
        // the deployment details: which container image, how many replicas,
        // port mappings, and routing. This is the equivalent of writing
        // deployment.yaml + service.yaml + httproute.yaml by hand.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");

        DeploymentSpec spec = new(
            Image: "registry.example.com/api",
            Tag: "v1.2.3",
            Replicas: 2,
            ContainerPort: 8080,
            ServicePort: 80,
            HostName: "api.dev.example.com",
            PathPrefix: "/",
            EnvironmentVariables: new Dictionary<string, string> { ["ASPNETCORE_ENVIRONMENT"] = "Development" },
            Resources: new ResourceSpec("100m", "500m", "128Mi", "512Mi"));

        // Act

        env.ConfigureDeployment(spec);

        // Assert

        env.DeploymentSpec.Should().NotBeNull();
        env.DeploymentSpec!.Image.Should().Be("registry.example.com/api");
        env.DeploymentSpec.Tag.Should().Be("v1.2.3");
        env.DeploymentSpec.Replicas.Should().Be(2);
        env.DeploymentSpec.ContainerPort.Should().Be(8080);
        env.DeploymentSpec.ServicePort.Should().Be(80);
        env.DeploymentSpec.HostName.Should().Be("api.dev.example.com");
        env.DeploymentSpec.Resources.Should().NotBeNull();
        env.SyncStatus.Should().Be(AppSyncStatus.Pending, "changing config resets sync to pending");
    }

    // ─── ConfigureHelmRelease ────────────────────────────────────────────

    [Fact]
    public void ConfigureHelmRelease_WithValidSpec_SetsHelmSpec()
    {
        // Arrange — For a Helm-type app, the admin points to a Helm chart
        // repository, selects the chart and version, and provides a values.yaml.
        // This is the equivalent of `helm install` with custom values.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "Redis", "redis", AppType.HelmChart);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "redis-dev");

        HelmReleaseSpec spec = new(
            RepoUrl: "https://charts.bitnami.com/bitnami",
            ChartName: "redis",
            ChartVersion: "18.6.1",
            ValuesYaml: "replica:\n  replicaCount: 3");

        // Act

        env.ConfigureHelmRelease(spec);

        // Assert

        env.HelmReleaseSpec.Should().NotBeNull();
        env.HelmReleaseSpec!.RepoUrl.Should().Be("https://charts.bitnami.com/bitnami");
        env.HelmReleaseSpec.ChartName.Should().Be("redis");
        env.HelmReleaseSpec.ChartVersion.Should().Be("18.6.1");
        env.HelmReleaseSpec.ValuesYaml.Should().Contain("replicaCount: 3");
        env.SyncStatus.Should().Be(AppSyncStatus.Pending);
    }

    // ─── Secrets ─────────────────────────────────────────────────────────

    [Fact]
    public void AddSecret_WithValidInputs_AddsSecretReference()
    {
        // Arrange — Secrets for an app environment are stored in the vault.
        // Here we add a reference that maps a Kubernetes secret key name
        // to the vault path where the actual secret value lives.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");

        // Act

        env.AddSecret("DATABASE_URL", "database-connection-string");

        // Assert

        env.Secrets.Should().HaveCount(1);
        env.Secrets[0].Name.Should().Be("DATABASE_URL");
        env.Secrets[0].VaultKey.Should().Be("database-connection-string");
        env.SyncStatus.Should().Be(AppSyncStatus.Pending, "adding a secret resets sync");
    }

    [Fact]
    public void AddSecret_DuplicateName_ThrowsInvalidOperation()
    {
        // Arrange — Each secret name must be unique within an environment.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");
        env.AddSecret("DATABASE_URL", "db-conn-string");

        // Act

        Action act = () => env.AddSecret("DATABASE_URL", "another-path");

        // Assert

        act.Should().Throw<InvalidOperationException>()
            .WithMessage("*already exists*");
    }

    [Fact]
    public void RemoveSecret_ExistingSecret_RemovesIt()
    {
        // Arrange

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");
        env.AddSecret("DATABASE_URL", "db-conn-string");

        // Act

        env.RemoveSecret("DATABASE_URL");

        // Assert

        env.Secrets.Should().BeEmpty();
        env.SyncStatus.Should().Be(AppSyncStatus.Pending);
    }

    // ─── Sync Status ─────────────────────────────────────────────────────

    [Fact]
    public void MarkSynced_UpdatesSyncStatus()
    {
        // Arrange — The reconciler successfully deployed the app.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");

        // Act

        env.MarkSynced();

        // Assert

        env.SyncStatus.Should().Be(AppSyncStatus.Synced);
        env.LastSyncAt.Should().NotBeNull();
    }

    [Fact]
    public void MarkError_SetsSyncStatusAndMessage()
    {
        // Arrange — Something went wrong during deployment.

        App app = App.Create(Guid.NewGuid(), Guid.NewGuid(), "API", "api", AppType.Deployment);
        AppEnvironment env = app.AddEnvironment(Guid.NewGuid(), Guid.NewGuid(), "api-dev");

        // Act

        env.MarkError("ImagePullBackOff: registry.example.com/api:v1.2.3");

        // Assert

        env.SyncStatus.Should().Be(AppSyncStatus.Error);
        env.SyncStatusMessage.Should().Contain("ImagePullBackOff");
    }
}