/*
Copyright 2020 The Knative 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 v1

import (
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	eventingduckv1 "knative.dev/eventing/pkg/apis/duck/v1"
	"knative.dev/pkg/apis"
	duckv1 "knative.dev/pkg/apis/duck/v1"
	"knative.dev/pkg/kmeta"
)

// +genclient
// +genreconciler
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// InMemoryChannel is a resource representing an in memory channel
type InMemoryChannel struct {
	metav1.TypeMeta `json:",inline"`
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty"`

	// Spec defines the desired state of the Channel.
	Spec InMemoryChannelSpec `json:"spec,omitempty"`

	// Status represents the current state of the Channel. This data may be out of
	// date.
	// +optional
	Status InMemoryChannelStatus `json:"status,omitempty"`
}

var (
	// Check that InMemoryChannel can be validated and defaulted.
	_ apis.Validatable = (*InMemoryChannel)(nil)
	_ apis.Defaultable = (*InMemoryChannel)(nil)

	// Check that InMemoryChannel can return its spec untyped.
	_ apis.HasSpec = (*InMemoryChannel)(nil)

	_ runtime.Object = (*InMemoryChannel)(nil)

	// Check that we can create OwnerReferences to an InMemoryChannel.
	_ kmeta.OwnerRefable = (*InMemoryChannel)(nil)

	// Check that the type conforms to the duck Knative Resource shape.
	_ duckv1.KRShaped = (*InMemoryChannel)(nil)
)

// InMemoryChannelSpec defines which subscribers have expressed interest in
// receiving events from this InMemoryChannel.
// arguments for a Channel.
type InMemoryChannelSpec struct {
	// Channel conforms to Duck type Channelable.
	eventingduckv1.ChannelableSpec `json:",inline"`
}

// ChannelStatus represents the current state of a Channel.
type InMemoryChannelStatus struct {
	// Channel conforms to Duck type ChannelableStatus.
	eventingduckv1.ChannelableStatus `json:",inline"`
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// InMemoryChannelList is a collection of in-memory channels.
type InMemoryChannelList struct {
	metav1.TypeMeta `json:",inline"`
	// +optional
	metav1.ListMeta `json:"metadata,omitempty"`
	Items           []InMemoryChannel `json:"items"`
}

// GetStatus retrieves the status of the InMemoryChannel. Implements the KRShaped interface.
func (t *InMemoryChannel) GetStatus() *duckv1.Status {
	return &t.Status.Status
}
