/*
Copyright 2015 The Kubernetes Authors All rights reserved.

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 registry

import (
	"github.com/kubernetes/deployment-manager/common"
	"github.com/kubernetes/deployment-manager/util"

	"fmt"
	"strings"
)

type inmemRegistryService struct {
	registries map[string]*common.AuthenticatedRegistry
}

func NewInmemRegistryService() common.RegistryService {
	rs := &inmemRegistryService{
		registries: make(map[string]*common.AuthenticatedRegistry),
	}

	pFormat := fmt.Sprintf("%s;%s", common.UnversionedRegistry, common.OneLevelRegistry)
	rs.Create(&common.Registry{
		Name:   "charts",
		Type:   common.GithubRegistryType,
		URL:    "github.com/helm/charts",
		Format: common.RegistryFormat(pFormat),
	})

	tFormat := fmt.Sprintf("%s;%s", common.VersionedRegistry, common.CollectionRegistry)
	rs.Create(&common.Registry{
		Name:   "application-dm-templates",
		Type:   common.GithubRegistryType,
		URL:    "github.com/kubernetes/application-dm-templates",
		Format: common.RegistryFormat(tFormat),
	})

	return rs
}

// List returns the list of known registries.
func (rs *inmemRegistryService) List() ([]*common.Registry, error) {
	ret := []*common.Registry{}
	for _, r := range rs.registries {
		ret = append(ret, &r.Registry)
	}

	return ret, nil
}

// Create creates an authenticated registry.
func (rs *inmemRegistryService) Create(registry *common.Registry) error {
	rs.registries[registry.Name] = &common.AuthenticatedRegistry{Registry: *registry}
	return nil
}

// Get returns a registry with a given name.
func (rs *inmemRegistryService) Get(name string) (*common.Registry, error) {
	r, ok := rs.registries[name]
	if !ok {
		return nil, fmt.Errorf("Failed to find registry named %s", name)
	}

	return &r.Registry, nil
}

// GetAuthenticatedRegistry returns an authenticated registry with a given name.
func (rs *inmemRegistryService) GetAuthenticatedRegistry(name string) (*common.AuthenticatedRegistry, error) {
	r, ok := rs.registries[name]
	if !ok {
		return nil, fmt.Errorf("Failed to find registry named %s", name)
	}

	return r, nil
}

// Create deletes the authenticated registry with a given name.
func (rs *inmemRegistryService) Delete(name string) error {
	_, ok := rs.registries[name]
	if !ok {
		return fmt.Errorf("Failed to find registry named %s", name)
	}

	delete(rs.registries, name)
	return nil
}

// GetByURL returns a registry that handles the types for a given URL.
func (rs *inmemRegistryService) GetByURL(URL string) (*common.Registry, error) {
	trimmed := util.TrimURLScheme(URL)
	for _, r := range rs.registries {
		if strings.HasPrefix(trimmed, util.TrimURLScheme(r.URL)) {
			return &r.Registry, nil
		}
	}

	return nil, fmt.Errorf("Failed to find registry for url: %s", URL)
}

// GetAuthenticatedRegistryByURL returns an authenticated registry that handles the types for a given URL.
func (rs *inmemRegistryService) GetAuthenticatedRegistryByURL(URL string) (*common.AuthenticatedRegistry, error) {
	trimmed := util.TrimURLScheme(URL)
	for _, r := range rs.registries {
		if strings.HasPrefix(trimmed, util.TrimURLScheme(r.URL)) {
			return r, nil
		}
	}

	return nil, fmt.Errorf("Failed to find registry for url: %s", URL)
}

// Set the credential for a registry.
func (rs *inmemRegistryService) SetCredential(name string, credential common.RegistryCredential) error {
	r, ok := rs.registries[name]
	if !ok {
		return fmt.Errorf("Failed to find registry named %s", name)
	}

	r.Credential = credential
	return nil
}

// Get the credential for a registry.
func (rs *inmemRegistryService) GetCredential(name string) (common.RegistryCredential, error) {
	r, ok := rs.registries[name]
	if !ok {
		return common.RegistryCredential{}, fmt.Errorf("Failed to find registry named %s", name)
	}

	return r.Credential, nil
}