/*

Licensed under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    https://www.gnu.org/licenses/agpl-3.0.html

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 settings

import (
	"sigs.k8s.io/controller-runtime/pkg/client"

	"k8s.libre.sh/application/settings/parameters"
	"k8s.libre.sh/interfaces"
	"k8s.libre.sh/meta"
	"k8s.libre.sh/objects"
)

const (
	// Generate settings as env variables in a configMap or Secret
	GenEnvFile SettingsGenerate = "envFile"
)

const (
	// Generate settings as env variables in a configMap or Secret
	SecretSettings SettingsType = "secret"
)

type SettingsGenerate string
type SettingsType string

// +kubebuilder:object:generate=true
type Settings struct {
	CreateOptions *CreateOptions `json:"createOptions,omitempty"`
	*SettingsSpec `json:",inline"`
}

// +kubebuilder:object:generate=true
type CreateOptions struct {
	CommonMeta   *meta.ObjectMeta `json:"commonMeta,omitempty"`
	SecretMeta   *meta.ObjectMeta `json:"secretMeta,omitempty"`
	ConfigMeta   *meta.ObjectMeta `json:"configMeta,omitempty"`
	Generate     SettingsGenerate `json:"generate,omitempty"`
	SettingsType SettingsType     `json:"type,omitempty"`
}

func NewSettings(co *CreateOptions, srcs *Sources, ps *parameters.Parameters) *Settings {
	return &Settings{
		CreateOptions: co,
		SettingsSpec: &SettingsSpec{
			Sources:    srcs,
			Parameters: ps,
		},
	}
}

func (opts *CreateOptions) Init() {
	if opts.CommonMeta == nil {
		opts.CommonMeta = &meta.ObjectMeta{}
	}

	if opts.CommonMeta.Labels == nil {
		opts.CommonMeta.Labels = make(map[string]string)
	}

	if opts.SecretMeta == nil {
		opts.SecretMeta = &meta.ObjectMeta{}
	}

	if opts.SecretMeta.Labels == nil {
		opts.SecretMeta.Labels = make(map[string]string)
	}

	if opts.ConfigMeta == nil {
		opts.ConfigMeta = &meta.ObjectMeta{}
	}

	if opts.ConfigMeta.Labels == nil {
		opts.SecretMeta.Labels = make(map[string]string)
	}

}

func (s *Settings) GetCreateOptions() *CreateOptions { return s.CreateOptions }

func (s *Settings) GetConfig() Config { return s.SettingsSpec }

func (s *Settings) GetMeta() meta.Instance { return s.CreateOptions.CommonMeta }

func (s *Settings) GetObjects() map[int]objects.Object { return GetObjects(s) }

func (s *Settings) SetDefaults() {
	secretSrc := Source{
		Ref:  s.GetCreateOptions().SecretMeta.GetName(),
		Type: "secret",
	}
	configSrc := Source{
		Ref:  s.GetCreateOptions().ConfigMeta.GetName(),
		Type: "configmap",
	}

	srcs := &Sources{}
	// Reset sources, we do not want to mount orginal resources
	if s.GetCreateOptions().Generate == GenEnvFile {
		srcs = &Sources{}
	}

	for _, p := range *s.GetParameters() {
		if p.MountType == parameters.MountEnvFile || s.GetCreateOptions().Generate == GenEnvFile {
			p.MountType = parameters.MountEnvFile
			// add newly created resource ref to sources
			if p.Type == parameters.ConfigParameter {
				srcs = AppendSourceIfUnique(srcs, configSrc)
			} else if p.Type == parameters.SecretParameter || p.Type == "" {
				srcs = AppendSourceIfUnique(srcs, secretSrc)
			}
			// Reset valueFrom, we do not want to mount orginal resources
			p.ValueFrom = parameters.ValueFrom{}
		}

		if s.GetCreateOptions().SettingsType == "configmap" {
			p.Type = parameters.ConfigParameter
		} else if s.GetCreateOptions().SettingsType == "secret" {
			p.Type = parameters.SecretParameter
		}

		if p.MountType == parameters.MountFile && len(p.Ref) == 0 {
			if p.Type == parameters.ConfigParameter {
				p.Ref = s.GetCreateOptions().ConfigMeta.GetName()

			}
			if p.Type == parameters.SecretParameter {
				p.Ref = s.GetCreateOptions().SecretMeta.GetName()

			}
		}
	}

	srcs.DeepCopyInto(s.GetSources())

}

func (s *Settings) Init(c client.Client, owner interfaces.Object) error {

	if s.CreateOptions == nil {
		s.CreateOptions = &CreateOptions{}
	}
	s.CreateOptions.Init()

	meta.SetObjectMeta(s.CreateOptions.CommonMeta, s.CreateOptions.ConfigMeta)
	meta.SetObjectMeta(s.CreateOptions.CommonMeta, s.CreateOptions.SecretMeta)

	err := InitParametersValueFrom(s, c, owner)

	if err != nil {
		return err
	}

	s.InitRandValues()

	if err != nil {
		return err
	}

	return nil
}