// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 cloudresourcemanager

import (
	"github.com/core-sdk/constant"
	"github.com/core-sdk/log"
	"github.com/core-sdk/schema"
	"cloud.google.com/go/iam/apiv1/iampb"
	resourcemanager "cloud.google.com/go/resourcemanager/apiv3"
	"cloud.google.com/go/resourcemanager/apiv3/resourcemanagerpb"
	"context"
	"github.com/cloudrec/gcp/collector"
	"go.uber.org/zap"
	"iter"
)

func GetProjectResource() schema.Resource {
	return schema.Resource{
		ResourceType:      collector.Project,
		ResourceTypeName:  collector.Project,
		ResourceGroupType: constant.GOVERNANCE,
		Desc:              `https://cloud.google.com/resource-manager/reference/rest`,
		ResourceDetailFunc: func(ctx context.Context, service schema.ServiceInterface, res chan<- any) error {
			svc := service.(*collector.Services).ProjectsClient
			defer svc.Close()
			for project, err := range SearchProjects(ctx, svc) {
				if err != nil {
					log.CtxLogger(ctx).Warn("SearchProjects error", zap.Error(err))
					return err
				}
				res <- ProjectDetail{
					Project:   project,
					IAMPolicy: getProjectIAMPolicy(ctx, svc, project.Name),
				}
			}

			return nil
		},
		RowField: schema.RowField{
			ResourceId:   "$.Project.name",
			ResourceName: "$.Project.display_name",
		},
		Dimension: schema.Global,
	}
}

type ProjectDetail struct {
	Project   *resourcemanagerpb.Project
	IAMPolicy *iampb.Policy
}

func SearchProjects(ctx context.Context, svc *resourcemanager.ProjectsClient) iter.Seq2[*resourcemanagerpb.Project, error] {

	return svc.SearchProjects(ctx, &resourcemanagerpb.SearchProjectsRequest{}).All()
}

func getProjectIAMPolicy(ctx context.Context, svc *resourcemanager.ProjectsClient, projectName string) *iampb.Policy {
	iamPolicy, err := svc.GetIamPolicy(ctx, &iampb.GetIamPolicyRequest{
		Resource: projectName,
	})
	if err != nil {
		log.CtxLogger(ctx).Warn("GetIamPolicy error", zap.Error(err))
		return nil
	}
	return iamPolicy
}
