// Copyright 2016 Iron.io
//
// 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 models

import "errors"

type Datastore interface {
	GetApp(appName string) (*App, error)
	GetApps(*AppFilter) ([]*App, error)
	StoreApp(*App) (*App, error)
	RemoveApp(appName string) error

	GetRoute(appName, routePath string) (*Route, error)
	GetRoutes(*RouteFilter) (routes []*Route, err error)
	GetRoutesByApp(string, *RouteFilter) (routes []*Route, err error)
	StoreRoute(*Route) (*Route, error)
	RemoveRoute(appName, routePath string) error

	// The following provide a generic key value store for arbitrary data, can be used by extensions to store extra data
	// todo: should we namespace these by app? Then when an app is deleted, it can delete any of this extra data too.
	Put([]byte, []byte) error
	Get([]byte) ([]byte, error)
}

var (
	ErrDatastoreEmptyAppName   = errors.New("Missing app name")
	ErrDatastoreEmptyRoutePath = errors.New("Missing route name")
	ErrDatastoreEmptyApp       = errors.New("Missing app")
	ErrDatastoreEmptyRoute     = errors.New("Missing route")
)

func ApplyRouteFilter(route *Route, filter *RouteFilter) bool {
	return (filter.Path == "" || route.Path == filter.Path) &&
		(filter.AppName == "" || route.AppName == filter.AppName) &&
		(filter.Image == "" || route.Image == filter.Image)
}