/*
 *  MIT License
 *
 *  Copyright (c) 2020 Nicolas JUHEL
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 *
 */

package group

import (
	sdkaws "github.com/aws/aws-sdk-go-v2/aws"
	sdkiam "github.com/aws/aws-sdk-go-v2/service/iam"
	sdktps "github.com/aws/aws-sdk-go-v2/service/iam/types"
)

func (cli *client) PolicyList(groupName string) (map[string]string, error) {
	var (
		err error
		res = make(map[string]string, 0)
		fct = func(pol sdktps.AttachedPolicy) bool {
			if pol.PolicyArn == nil || len(*pol.PolicyArn) == 0 {
				return true
			} else if pol.PolicyName == nil || len(*pol.PolicyName) == 0 {
				return true
			} else {
				res[*pol.PolicyName] = *pol.PolicyArn
			}

			return true
		}
	)

	err = cli.PolicyAttachedWalk(groupName, fct)
	return res, err
}

func (cli *client) PolicyAttach(groupName, polArn string) error {
	_, err := cli.iam.AttachGroupPolicy(cli.GetContext(), &sdkiam.AttachGroupPolicyInput{
		GroupName: sdkaws.String(groupName),
		PolicyArn: sdkaws.String(polArn),
	})

	return cli.GetError(err)
}

func (cli *client) PolicyDetach(groupName, polArn string) error {
	_, err := cli.iam.DetachGroupPolicy(cli.GetContext(), &sdkiam.DetachGroupPolicyInput{
		GroupName: sdkaws.String(groupName),
		PolicyArn: sdkaws.String(polArn),
	})

	return cli.GetError(err)
}

func (cli *client) PolicyAttachedList(groupName string) ([]sdktps.AttachedPolicy, error) {
	var (
		err error
		res = make([]sdktps.AttachedPolicy, 0)
		fct = func(pol sdktps.AttachedPolicy) bool {
			res = append(res, pol)
			return true
		}
	)

	err = cli.PolicyAttachedWalk(groupName, fct)

	return res, err
}

func (cli *client) PolicyAttachedWalk(groupName string, fct PoliciesWalkFunc) error {
	var m *string

	in := &sdkiam.ListAttachedGroupPoliciesInput{
		GroupName: sdkaws.String(groupName),
		MaxItems:  sdkaws.Int32(1000),
	}

	if fct == nil {
		fct = func(pol sdktps.AttachedPolicy) bool {
			return false
		}
	}

	for {
		if m != nil {
			in.Marker = m
		} else {
			in.Marker = nil
		}

		lst, err := cli.iam.ListAttachedGroupPolicies(cli.GetContext(), in)

		if err != nil {
			return cli.GetError(err)
		} else if lst == nil || lst.AttachedPolicies == nil {
			return nil
		}

		for i := range lst.AttachedPolicies {
			if !fct(lst.AttachedPolicies[i]) {
				return nil
			}
		}

		if lst.IsTruncated && lst.Marker != nil {
			m = lst.Marker
		} else {
			return nil
		}
	}
}
