/*
 *     Copyright 2022 The Dragonfly 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 service

import (
	"context"
	"errors"

	"d7y.io/dragonfly/v2/manager/models"
	"d7y.io/dragonfly/v2/manager/types"
	"d7y.io/dragonfly/v2/pkg/structure"
)

func (s *service) CreateSeedPeerCluster(ctx context.Context, json types.CreateSeedPeerClusterRequest) (*models.SeedPeerCluster, error) {
	config, err := structure.StructToMap(json.Config)
	if err != nil {
		return nil, err
	}

	seedPeerCluster := models.SeedPeerCluster{
		Name:   json.Name,
		BIO:    json.BIO,
		Config: config,
	}

	if err := s.db.WithContext(ctx).Create(&seedPeerCluster).Error; err != nil {
		return nil, err
	}

	return &seedPeerCluster, nil
}

func (s *service) DestroySeedPeerCluster(ctx context.Context, id uint) error {
	seedPeerCluster := models.SeedPeerCluster{}
	if err := s.db.WithContext(ctx).Preload("SeedPeers").First(&seedPeerCluster, id).Error; err != nil {
		return err
	}

	if len(seedPeerCluster.SeedPeers) != 0 {
		return errors.New("seedPeer cluster exists seedPeer")
	}

	if err := s.db.WithContext(ctx).Delete(&models.SeedPeerCluster{}, id).Error; err != nil {
		return err
	}

	return nil
}

func (s *service) UpdateSeedPeerCluster(ctx context.Context, id uint, json types.UpdateSeedPeerClusterRequest) (*models.SeedPeerCluster, error) {
	var (
		config map[string]any
		err    error
	)
	if json.Config != nil {
		config, err = structure.StructToMap(json.Config)
		if err != nil {
			return nil, err
		}
	}

	seedPeerCluster := models.SeedPeerCluster{}
	if err := s.db.WithContext(ctx).First(&seedPeerCluster, id).Updates(models.SeedPeerCluster{
		Name:   json.Name,
		BIO:    json.BIO,
		Config: config,
	}).Error; err != nil {
		return nil, err
	}

	return &seedPeerCluster, nil
}

func (s *service) GetSeedPeerCluster(ctx context.Context, id uint) (*models.SeedPeerCluster, error) {
	seedPeerCluster := models.SeedPeerCluster{}
	if err := s.db.WithContext(ctx).First(&seedPeerCluster, id).Error; err != nil {
		return nil, err
	}

	return &seedPeerCluster, nil
}

func (s *service) GetSeedPeerClusters(ctx context.Context, q types.GetSeedPeerClustersQuery) ([]models.SeedPeerCluster, int64, error) {
	var count int64
	var seedPeerClusters []models.SeedPeerCluster
	if err := s.db.WithContext(ctx).Scopes(models.Paginate(q.Page, q.PerPage)).Where(&models.SeedPeerCluster{
		Name: q.Name,
	}).Find(&seedPeerClusters).Limit(-1).Offset(-1).Count(&count).Error; err != nil {
		return nil, 0, err
	}

	return seedPeerClusters, count, nil
}

func (s *service) AddSeedPeerToSeedPeerCluster(ctx context.Context, id, seedPeerID uint) error {
	seedPeerCluster := models.SeedPeerCluster{}
	if err := s.db.WithContext(ctx).First(&seedPeerCluster, id).Error; err != nil {
		return err
	}

	seedPeer := models.SeedPeer{}
	if err := s.db.WithContext(ctx).First(&seedPeer, seedPeerID).Error; err != nil {
		return err
	}

	if err := s.db.WithContext(ctx).Model(&seedPeerCluster).Association("SeedPeers").Append(&seedPeer); err != nil {
		return err
	}

	return nil
}

func (s *service) AddSchedulerClusterToSeedPeerCluster(ctx context.Context, id, schedulerClusterID uint) error {
	seedPeerCluster := models.SeedPeerCluster{}
	if err := s.db.WithContext(ctx).First(&seedPeerCluster, id).Error; err != nil {
		return err
	}

	schedulerCluster := models.SchedulerCluster{}
	if err := s.db.WithContext(ctx).First(&schedulerCluster, schedulerClusterID).Error; err != nil {
		return err
	}

	if err := s.db.WithContext(ctx).Model(&schedulerCluster).Association("SeedPeerClusters").Clear(); err != nil {
		return err
	}

	if err := s.db.WithContext(ctx).Model(&seedPeerCluster).Association("SchedulerClusters").Append(&schedulerCluster); err != nil {
		return err
	}

	return nil
}