/*
Copyright 2020 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 openpitrix

import (
	"github.com/golang/protobuf/ptypes/wrappers"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"k8s.io/klog"
	"kubesphere.io/kubesphere/pkg/models"
	"kubesphere.io/kubesphere/pkg/server/params"
	"kubesphere.io/kubesphere/pkg/simple/client/openpitrix"
	"openpitrix.io/openpitrix/pkg/pb"
)

type CategoryInterface interface {
	CreateCategory(request *CreateCategoryRequest) (*CreateCategoryResponse, error)
	DeleteCategory(id string) error
	ModifyCategory(id string, request *ModifyCategoryRequest) error
	ListCategories(conditions *params.Conditions, orderBy string, reverse bool, limit, offset int) (*models.PageableResponse, error)
	DescribeCategory(id string) (*Category, error)
}

type categoryOperator struct {
	opClient openpitrix.Client
}

func newCategoryOperator(opClient openpitrix.Client) CategoryInterface {
	return &categoryOperator{
		opClient: opClient,
	}
}

func (c *categoryOperator) CreateCategory(request *CreateCategoryRequest) (*CreateCategoryResponse, error) {
	r := &pb.CreateCategoryRequest{
		Name:        &wrappers.StringValue{Value: request.Name},
		Locale:      &wrappers.StringValue{Value: request.Locale},
		Description: &wrappers.StringValue{Value: request.Description},
	}
	if request.Icon != nil {
		r.Icon = &wrappers.BytesValue{Value: request.Icon}
	}

	resp, err := c.opClient.CreateCategory(openpitrix.SystemContext(), r)
	if err != nil {
		klog.Error(err)
		return nil, err
	}
	return &CreateCategoryResponse{
		CategoryId: resp.GetCategoryId().GetValue(),
	}, nil
}

func (c *categoryOperator) DeleteCategory(id string) error {
	_, err := c.opClient.DeleteCategories(openpitrix.SystemContext(), &pb.DeleteCategoriesRequest{
		CategoryId: []string{id},
	})
	if err != nil {
		klog.Error(err)
		return err
	}
	return nil
}

func (c *categoryOperator) ModifyCategory(id string, request *ModifyCategoryRequest) error {
	modifyCategoryRequest := &pb.ModifyCategoryRequest{
		CategoryId: &wrappers.StringValue{Value: id},
	}
	if request.Name != nil {
		modifyCategoryRequest.Name = &wrappers.StringValue{Value: *request.Name}
	}
	if request.Locale != nil {
		modifyCategoryRequest.Locale = &wrappers.StringValue{Value: *request.Locale}
	}
	if request.Description != nil {
		modifyCategoryRequest.Description = &wrappers.StringValue{Value: *request.Description}
	}
	if request.Icon != nil {
		modifyCategoryRequest.Icon = &wrappers.BytesValue{Value: request.Icon}
	}

	_, err := c.opClient.ModifyCategory(openpitrix.SystemContext(), modifyCategoryRequest)
	if err != nil {
		klog.Error(err)
		return err
	}
	return nil
}

func (c *categoryOperator) DescribeCategory(id string) (*Category, error) {
	resp, err := c.opClient.DescribeCategories(openpitrix.SystemContext(), &pb.DescribeCategoriesRequest{
		CategoryId: []string{id},
		Limit:      1,
	})
	if err != nil {
		klog.Error(err)
		return nil, err
	}

	var category *Category

	if len(resp.CategorySet) > 0 {
		category = convertCategory(resp.CategorySet[0])
		return category, nil
	} else {
		err := status.New(codes.NotFound, "resource not found").Err()
		klog.Error(err)
		return nil, err
	}
}

func (c *categoryOperator) ListCategories(conditions *params.Conditions, orderBy string, reverse bool, limit, offset int) (*models.PageableResponse, error) {
	req := &pb.DescribeCategoriesRequest{}

	if keyword := conditions.Match[Keyword]; keyword != "" {
		req.SearchWord = &wrappers.StringValue{Value: keyword}
	}
	if orderBy != "" {
		req.SortKey = &wrappers.StringValue{Value: orderBy}
	}
	req.Reverse = &wrappers.BoolValue{Value: reverse}
	req.Limit = uint32(limit)
	req.Offset = uint32(offset)
	resp, err := c.opClient.DescribeCategories(openpitrix.SystemContext(), req)
	if err != nil {
		klog.Error(err)
		return nil, err
	}

	items := make([]interface{}, 0)

	for _, item := range resp.CategorySet {
		items = append(items, convertCategory(item))
	}

	return &models.PageableResponse{Items: items, TotalCount: int(resp.TotalCount)}, nil
}