/*
Copyright 2021 The KubeVela Authors.

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 appfile

import (
	"context"
	"fmt"

	apierrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	ctypes "k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/oam-dev/kubevela/apis/core.oam.dev/v1beta1"
	"github.com/oam-dev/kubevela/pkg/oam"
	"github.com/oam-dev/kubevela/pkg/utils/util"
	"github.com/oam-dev/kubevela/references/appfile/api"
)

// Run will deploy OAM objects and other assistant K8s Objects including ConfigMap, OAM Scope Custom Resource.
func Run(ctx context.Context, client client.Client, app *v1beta1.Application, assistantObjects []oam.Object) error {
	if err := CreateOrUpdateObjects(ctx, client, assistantObjects); err != nil {
		return err
	}
	if app != nil {
		if err := CreateOrUpdateApplication(ctx, client, app); err != nil {
			return err
		}
	}
	return nil
}

// CreateOrUpdateObjects will create all scopes
func CreateOrUpdateObjects(ctx context.Context, client client.Client, objects []oam.Object) error {
	for _, obj := range objects {
		key := ctypes.NamespacedName{Name: obj.GetName(), Namespace: obj.GetNamespace()}
		u := &unstructured.Unstructured{}
		u.SetGroupVersionKind(obj.GetObjectKind().GroupVersionKind())
		err := client.Get(ctx, key, u)
		if err == nil {
			obj.SetResourceVersion(u.GetResourceVersion())
			fmt.Println("Updating: ", u.GetObjectKind().GroupVersionKind().String(), "in", u.GetNamespace())
			if err = client.Update(ctx, obj); err != nil {
				return err
			}
			continue
		}
		if !apierrors.IsNotFound(err) {
			return err
		}
		fmt.Println("Creating: ", u.GetObjectKind().GroupVersionKind().String(), "in", u.GetNamespace())
		if err = client.Create(ctx, obj); err != nil {
			return err
		}
	}
	return nil
}

// CreateOrUpdateApplication will create if not exist and update if exists.
func CreateOrUpdateApplication(ctx context.Context, client client.Client, app *v1beta1.Application) error {
	var geta v1beta1.Application
	key := ctypes.NamespacedName{Name: app.Name, Namespace: app.Namespace}
	var exist = true
	if err := client.Get(ctx, key, &geta); err != nil {
		if !apierrors.IsNotFound(err) {
			return err
		}
		exist = false
	}
	if !exist {
		return client.Create(ctx, app)
	}
	app.ResourceVersion = geta.ResourceVersion
	return client.Update(ctx, app)
}

// BuildRun will build application and deploy from Appfile
func BuildRun(ctx context.Context, app *api.Application, client client.Client, namespace string, io util.IOStreams) error {
	o, err := app.ConvertToApplication(namespace, io, app.Tm, true)
	if err != nil {
		return err
	}
	return Run(ctx, client, o, nil)
}