/*
Copyright (c) 2017 OpenStack Foundation.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package tenant

import (
	crv1 "git.openstack.org/openstack/stackube/pkg/apis/v1"
	"git.openstack.org/openstack/stackube/pkg/auth-controller/rbacmanager/rbac"
	"git.openstack.org/openstack/stackube/pkg/openstack"

	"github.com/golang/glog"
	apiv1 "k8s.io/api/core/v1"
	apierrors "k8s.io/apimachinery/pkg/api/errors"
	apismetav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func (c *TenantController) syncTenant(tenant *crv1.Tenant) {
	roleBinding := rbac.GenerateClusterRoleBindingByTenant(tenant.Name)
	_, err := c.k8sClient.Rbac().ClusterRoleBindings().Create(roleBinding)
	if err != nil && !apierrors.IsAlreadyExists(err) {
		glog.Errorf("Failed create ClusterRoleBinding for tenant %s: %v", tenant.Name, err)
		return
	}
	glog.V(4).Infof("Created ClusterRoleBindings %s-namespace-creater for tenant %s", tenant.Name, tenant.Name)
	if tenant.Spec.TenantID != "" {
		// Create user with the spec username and password in the given tenant
		err = c.openstackClient.CreateUser(tenant.Spec.UserName, tenant.Spec.Password, tenant.Spec.TenantID)
		if err != nil && !openstack.IsAlreadyExists(err) {
			glog.Errorf("Failed create user %s: %v", tenant.Spec.UserName, err)
			return
		}
	} else {
		// Create tenant if the tenant not exist in keystone
		tenantID, err := c.openstackClient.CreateTenant(tenant.Name)
		if err != nil {
			glog.Errorf("Failed create tenant %#v: %v", tenant, err)
			return
		}
		// Create user with the spec username and password in the created tenant
		err = c.openstackClient.CreateUser(tenant.Spec.UserName, tenant.Spec.Password, tenantID)
		if err != nil {
			glog.Errorf("Failed create user %s: %v", tenant.Spec.UserName, err)
			return
		}
	}

	// Create namespace which name is the same as the tenant's name
	err = c.createNamespace(tenant.Name)
	if err != nil {
		glog.Errorf("Failed create namespace %s: %v", tenant.Name, err)
		return
	}
	glog.V(4).Infof("Created namespace %s for tenant %s", tenant.Name, tenant.Name)
}

func (c *TenantController) createClusterRoles() error {
	nsCreater := rbac.GenerateClusterRole()
	_, err := c.k8sClient.Rbac().ClusterRoles().Create(nsCreater)
	if err != nil && !apierrors.IsAlreadyExists(err) {
		glog.Errorf("Failed create ClusterRoles namespace-creater: %v", err)
		return err
	}
	glog.V(4).Info("Created ClusterRoles namespace-creater")
	return nil
}

func (c *TenantController) createNamespace(namespace string) error {
	_, err := c.k8sClient.CoreV1().Namespaces().Create(&apiv1.Namespace{
		ObjectMeta: apismetav1.ObjectMeta{
			Name: namespace,
		},
	})
	if err != nil && !apierrors.IsAlreadyExists(err) {
		glog.Errorf("Failed create namespace %s: %v", namespace, err)
		return err
	}
	return nil
}

func (c *TenantController) deleteNamespace(namespace string) error {
	err := c.k8sClient.CoreV1().Namespaces().Delete(namespace, apismetav1.NewDeleteOptions(0))
	if err != nil {
		return err
	}
	return nil
}