/*
 *
 * Copyright 2019 The KubeSphere 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 application

import (
	"github.com/kubernetes-sigs/application/pkg/apis/app/v1beta1"
	"github.com/kubernetes-sigs/application/pkg/client/informers/externalversions"
	"k8s.io/apimachinery/pkg/labels"
	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha2"
	"kubesphere.io/kubesphere/pkg/server/params"
	"sort"
)

type appSearcher struct {
	informer externalversions.SharedInformerFactory
}

func NewApplicationSearcher(informers externalversions.SharedInformerFactory) v1alpha2.Interface {
	return &appSearcher{informer: informers}
}

func (s *appSearcher) Get(namespace, name string) (interface{}, error) {
	return s.informer.App().V1beta1().Applications().Lister().Applications(namespace).Get(name)
}

func (s *appSearcher) match(match map[string]string, item *v1beta1.Application) bool {
	for k, v := range match {
		if !v1alpha2.ObjectMetaExactlyMath(k, v, item.ObjectMeta) {
			return false
		}
	}
	return true
}

func (s *appSearcher) fuzzy(fuzzy map[string]string, item *v1beta1.Application) bool {
	for k, v := range fuzzy {
		if !v1alpha2.ObjectMetaFuzzyMath(k, v, item.ObjectMeta) {
			return false
		}
	}
	return true
}

func (s *appSearcher) Search(namespace string, conditions *params.Conditions, orderBy string, reverse bool) ([]interface{}, error) {
	apps, err := s.informer.App().V1beta1().Applications().Lister().Applications(namespace).List(labels.Everything())

	if err != nil {
		return nil, err
	}

	result := make([]*v1beta1.Application, 0)

	if len(conditions.Match) == 0 && len(conditions.Fuzzy) == 0 {
		result = apps
	} else {
		for _, item := range apps {
			if s.match(conditions.Match, item) && s.fuzzy(conditions.Fuzzy, item) {
				result = append(result, item)
			}
		}
	}
	sort.Slice(result, func(i, j int) bool {
		if reverse {
			i, j = j, i
		}
		return v1alpha2.ObjectMetaCompare(result[i].ObjectMeta, result[j].ObjectMeta, orderBy)
	})

	r := make([]interface{}, 0)
	for _, i := range result {
		r = append(r, i)
	}
	return r, nil
}