// Copyright 2018-2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.

package eosgrpchome

import (
	"github.com/cs3org/reva/v2/pkg/events"
	"github.com/cs3org/reva/v2/pkg/storage"
	"github.com/cs3org/reva/v2/pkg/storage/fs/registry"
	"github.com/cs3org/reva/v2/pkg/storage/utils/eosfs"
	"github.com/mitchellh/mapstructure"
	"github.com/pkg/errors"
)

func init() {
	registry.Register("eosgrpchome", New)
}

func parseConfig(m map[string]interface{}) (*eosfs.Config, error) {
	c := &eosfs.Config{}
	if err := mapstructure.Decode(m, c); err != nil {
		err = errors.Wrap(err, "error decoding conf")
		return nil, err
	}

	// default to version invariance if not configured
	if _, ok := m["version_invariant"]; !ok {
		c.VersionInvariant = true
	}

	return c, nil
}

// New returns a new implementation of the storage.FS interface that connects to EOS.
func New(m map[string]interface{}, _ events.Stream) (storage.FS, error) {
	c, err := parseConfig(m)
	if err != nil {
		return nil, err
	}
	c.UseGRPC = true
	c.EnableHome = true

	return eosfs.NewEOSFS(c)
}
