/*
Copyright 2021 The KodeRover 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 mongodb

import (
	"context"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"

	"github.com/koderover/zadig/pkg/microservice/aslan/config"
	"github.com/koderover/zadig/pkg/microservice/aslan/core/common/repository/models"
	"github.com/koderover/zadig/pkg/setting"
	"github.com/koderover/zadig/pkg/tool/crypto"
	mongotool "github.com/koderover/zadig/pkg/tool/mongo"
)

type ClusterListOpts struct {
	IDs []string
}

type K8SClusterColl struct {
	*mongo.Collection

	coll string
}

func NewK8SClusterColl() *K8SClusterColl {
	name := models.K8SCluster{}.TableName()
	return &K8SClusterColl{
		Collection: mongotool.Database(config.MongoDatabase()).Collection(name),
		coll:       name,
	}
}

func (c *K8SClusterColl) GetCollectionName() string {
	return c.coll
}

func (c *K8SClusterColl) EnsureIndex(_ context.Context) error {
	return nil
}

func (c *K8SClusterColl) Delete(id string) error {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	query := bson.M{"_id": oid}
	_, err = c.DeleteOne(context.TODO(), query)
	return err
}

func (c *K8SClusterColl) Create(cluster *models.K8SCluster, id string) error {
	if id != "" {
		cluster.ID, _ = primitive.ObjectIDFromHex(id)
		// If the local cluster already exists, do not insert，and return nil
		if _, err := c.Get(id); err == nil {
			return nil
		}
	}
	res, err := c.InsertOne(context.TODO(), cluster)
	if oid, ok := res.InsertedID.(primitive.ObjectID); ok {
		cluster.ID = oid
	}

	return err
}

// Update ...
func (c *K8SClusterColl) Update(cluster *models.K8SCluster) error {
	_, err := c.UpdateOne(context.TODO(), bson.M{"_id": cluster.ID}, bson.M{"$set": cluster})
	return err
}

func (c *K8SClusterColl) UpdateScheduleStrategy(cluster *models.K8SCluster) error {
	_, err := c.UpdateOne(context.TODO(), bson.M{"_id": cluster.ID}, bson.M{"$set": bson.M{
		"advanced_config.schedule_strategy": cluster.AdvancedConfig.ScheduleStrategy,
	}})
	return err
}

// Get ...
func (c *K8SClusterColl) Get(id string) (*models.K8SCluster, error) {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return nil, err
	}

	query := bson.M{"_id": oid}
	res := &models.K8SCluster{}
	err = c.FindOne(context.TODO(), query).Decode(res)

	return res, err
}

func (c *K8SClusterColl) HasDuplicateName(id, name string) (bool, error) {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return false, err
	}

	query := bson.M{"_id": bson.M{"$ne": oid}, "name": name}

	count, err := c.CountDocuments(context.TODO(), query)
	if err != nil {
		return false, err
	}

	return count > 0, nil
}

func (c *K8SClusterColl) Count() (int64, error) {
	query := bson.M{}

	ctx := context.Background()
	count, err := c.Collection.CountDocuments(ctx, query)
	if err != nil {
		return 0, err
	}

	return count, nil
}

func (c *K8SClusterColl) List(opts *ClusterListOpts) ([]*models.K8SCluster, error) {
	var clusters []*models.K8SCluster

	if opts == nil {
		opts = &ClusterListOpts{}
	}

	query := bson.M{}
	if len(opts.IDs) > 0 {
		var ids []primitive.ObjectID
		for _, id := range opts.IDs {
			oid, err := primitive.ObjectIDFromHex(id)
			if err != nil {
				return nil, err
			}
			ids = append(ids, oid)
		}

		query["_id"] = bson.M{"$in": ids}
	}

	cursor, err := c.Collection.Find(context.TODO(), query)
	if err != nil {
		return nil, err
	}
	err = cursor.All(context.TODO(), &clusters)
	if err != nil {
		return nil, err
	}

	return clusters, err
}

func (c *K8SClusterColl) Find(clusterType string) ([]*models.K8SCluster, error) {
	var clusters []*models.K8SCluster

	query := bson.M{}
	if clusterType != "" {
		switch clusterType {
		case setting.ProdENV:
			query["production"] = true
		default:
			query["production"] = false
		}
	}

	cursor, err := c.Collection.Find(context.TODO(), query)
	if err != nil {
		return nil, err
	}
	err = cursor.All(context.TODO(), &clusters)
	if err != nil {
		return nil, err
	}

	return clusters, err
}

func (c *K8SClusterColl) FindByName(name string) (*models.K8SCluster, error) {
	res := &models.K8SCluster{}
	err := c.FindOne(context.TODO(), bson.M{"name": name}).Decode(res)

	return res, err
}

func (c *K8SClusterColl) FindByID(ID string) (*models.K8SCluster, error) {
	clusterID, err := primitive.ObjectIDFromHex(ID)
	if err != nil {
		return nil, err
	}
	res := &models.K8SCluster{}
	err = c.FindOne(context.TODO(), bson.M{"_id": clusterID}).Decode(res)

	return res, err
}

func (c *K8SClusterColl) UpdateMutableFields(cluster *models.K8SCluster, id string) error {
	var err error
	cluster.ID, err = primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}
	_, err = c.UpdateOne(context.TODO(),
		bson.M{"_id": cluster.ID}, bson.M{"$set": bson.M{
			"name":            cluster.Name,
			"description":     cluster.Description,
			"tags":            cluster.Tags,
			"namespace":       cluster.Namespace,
			"production":      cluster.Production,
			"advanced_config": cluster.AdvancedConfig,
			"cache":           cluster.Cache,
			"dind_cfg":        cluster.DindCfg,
			"kube_config":     cluster.KubeConfig,
			"type":            cluster.Type,
			"share_storage":   cluster.ShareStorage,
			"provider":        cluster.Provider,
		}},
	)

	return err
}

func (c *K8SClusterColl) UpdateStatus(cluster *models.K8SCluster) error {
	_, err := c.UpdateOne(context.TODO(),
		bson.M{"_id": cluster.ID}, bson.M{"$set": bson.M{
			"status": cluster.Status,
		}},
	)

	return err
}

func (c *K8SClusterColl) UpdateUpgradeAgentInfo(id, updateHubagentErrorMsg string) error {
	clusterID, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}
	_, err = c.UpdateOne(context.TODO(),
		bson.M{"_id": clusterID}, bson.M{"$set": bson.M{
			"update_hubagent_error_msg": updateHubagentErrorMsg,
		}},
	)
	return err
}

func (c *K8SClusterColl) FindConnectedClusters() ([]*models.K8SCluster, error) {
	var clusters []*models.K8SCluster
	cursor, err := c.Collection.Find(context.TODO(), bson.M{"disconnected": false})
	if err != nil {
		return nil, err
	}
	err = cursor.All(context.TODO(), &clusters)

	return clusters, err
}

func (c *K8SClusterColl) UpdateConnectState(id string, disconnected bool) error {
	oid, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		return err
	}

	newState := bson.M{"disconnected": disconnected}

	if disconnected {
		newState["status"] = string(setting.Disconnected)
	} else {
		newState["status"] = string(setting.Pending)
	}

	_, err = c.UpdateMany(context.TODO(), bson.M{"_id": oid}, bson.M{"$set": newState})
	return err
}

func (c *K8SClusterColl) GetByToken(token string) (*models.K8SCluster, error) {
	id, err := crypto.AesDecrypt(token)
	if err != nil {
		return nil, err
	}

	return c.Get(id)
}

func (c *K8SClusterColl) FindActiveClusters() ([]*models.K8SCluster, error) {
	connectedClusters, err := c.FindConnectedClusters()
	if err != nil {
		return nil, err
	}

	activeClusters := []*models.K8SCluster{}
	for _, cluster := range connectedClusters {
		if cluster.Status != setting.Normal {
			continue
		}

		activeClusters = append(activeClusters, cluster)
	}

	return activeClusters, nil
}
