package k8s

import (
	"context"
	"fmt"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	"github.com/iliaivanov/spec-kit-remote/cmd/dev-pod-api/internal/model"
)

// EnsureNamespace creates a namespace for the user if it doesn't already exist.
// Returns nil if the namespace already exists (idempotent).
func (c *Client) EnsureNamespace(ctx context.Context, user string) error {
	ns := &corev1.Namespace{
		ObjectMeta: metav1.ObjectMeta{
			Name: model.NamespaceName(user),
			Labels: map[string]string{
				"app":        "dev-pod",
				"managed-by": "dev-pod-api",
				"user":       user,
			},
		},
	}

	_, err := c.Clientset.CoreV1().Namespaces().Create(ctx, ns, metav1.CreateOptions{})
	if err != nil {
		if errors.IsAlreadyExists(err) {
			return nil
		}
		return fmt.Errorf("create namespace %s: %w", ns.Name, err)
	}
	return nil
}

// DeleteNamespace deletes the user's namespace and all resources in it.
func (c *Client) DeleteNamespace(ctx context.Context, user string) error {
	nsName := model.NamespaceName(user)
	err := c.Clientset.CoreV1().Namespaces().Delete(ctx, nsName, metav1.DeleteOptions{})
	if err != nil {
		if errors.IsNotFound(err) {
			return nil
		}
		return fmt.Errorf("delete namespace %s: %w", nsName, err)
	}
	return nil
}