// 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 bufplugin

import (
	"errors"
	"fmt"
)

import (
	"golang.org/x/mod/semver"
)

import (
	"github.com/apache/dubbo-kubernetes/pkg/bufman/bufpkg/bufplugin/bufpluginconfig"
	"github.com/apache/dubbo-kubernetes/pkg/bufman/bufpkg/bufplugin/bufpluginref"
)

type plugin struct {
	version              string
	dependencies         []bufpluginref.PluginReference
	registry             *bufpluginconfig.RegistryConfig
	containerImageDigest string
	sourceURL            string
	description          string
}

var _ Plugin = (*plugin)(nil)

func newPlugin(
	version string,
	dependencies []bufpluginref.PluginReference,
	registryConfig *bufpluginconfig.RegistryConfig,
	containerImageDigest string,
	sourceURL string,
	description string,
) (*plugin, error) {
	if version == "" {
		return nil, errors.New("plugin version is required")
	}
	if !semver.IsValid(version) {
		// This will probably already be validated in other call-sites
		// (e.g. when we construct a *bufpluginconfig.Config or when we
		// map from the Protobuf representation), but we may as well
		// include it at the lowest common denominator, too.
		return nil, fmt.Errorf("plugin version %q must be a valid semantic version", version)
	}
	if containerImageDigest == "" {
		return nil, errors.New("plugin image digest is required")
	}
	return &plugin{
		version:              version,
		dependencies:         dependencies,
		registry:             registryConfig,
		containerImageDigest: containerImageDigest,
		sourceURL:            sourceURL,
		description:          description,
	}, nil
}

// Version returns the plugin's version.
func (p *plugin) Version() string {
	return p.version
}

// Dependencies returns the plugin's dependencies on other plugins.
func (p *plugin) Dependencies() []bufpluginref.PluginReference {
	return p.dependencies
}

// Registry returns the plugin's registry configuration.
func (p *plugin) Registry() *bufpluginconfig.RegistryConfig {
	return p.registry
}

// ContainerImageDigest returns the plugin's image digest.
func (p *plugin) ContainerImageDigest() string {
	return p.containerImageDigest
}

// SourceURL is an optional attribute used to specify where the source for the plugin can be found.
func (p *plugin) SourceURL() string {
	return p.sourceURL
}

// Description is an optional attribute to provide a more detailed description for the plugin.
func (p *plugin) Description() string {
	return p.description
}