/*
Copyright The Kubernetes 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 linodemodel

import (
	"fmt"
	"strings"

	"k8s.io/kops/upup/pkg/fi"
	"k8s.io/kops/upup/pkg/fi/cloudup/linode"
	"k8s.io/kops/upup/pkg/fi/cloudup/linodetasks"
)

const maxLinodeSSHKeyNameLength = 64

// SSHKeyModelBuilder configures profile SSH key resources for Linode (Akamai).
type SSHKeyModelBuilder struct {
	*LinodeModelContext
	Lifecycle fi.Lifecycle
}

var _ fi.CloudupModelBuilder = &SSHKeyModelBuilder{}

func (b *SSHKeyModelBuilder) Build(c *fi.CloudupModelBuilderContext) error {
	if !b.UseSSHKey() {
		return nil
	}

	name, err := b.SSHKeyName()
	if err != nil {
		return fmt.Errorf("error building Linode (Akamai) SSH key task: %w", err)
	}
	name = linode.NormalizeLinodeLabel(name)

	// Linode (Akamai) SSH key labels have a maximum length of 64 characters. If the generated name exceeds this length, we truncate it and trim any trailing hyphens or underscores.
	if len(name) > maxLinodeSSHKeyNameLength {
		name = strings.Trim(name[:maxLinodeSSHKeyNameLength], "-_")
	}

	t := &linodetasks.SSHKey{
		Name:      new(name),
		Lifecycle: b.Lifecycle,
	}
	if len(b.SSHPublicKeys) > 0 {
		sshKeyResource := fi.Resource(fi.NewBytesResource(b.SSHPublicKeys[0]))
		t.PublicKey = &sshKeyResource
	}
	c.AddTask(t)

	return nil
}
