// Copyright the Drone 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 yaml

import (
	"github.com/docker/go-units"
)

// BytesSize stores a human-readable size in bytes,
// kibibytes, mebibytes, gibibytes, or tebibytes
// (eg. "44kiB", "17MiB").
type BytesSize int64

// UnmarshalYAML implements yaml unmarshalling.
func (b *BytesSize) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var intType int64
	if err := unmarshal(&intType); err == nil {
		*b = BytesSize(intType)
		return nil
	}

	var stringType string
	if err := unmarshal(&stringType); err != nil {
		return err
	}

	intType, err := units.RAMInBytes(stringType)
	if err == nil {
		*b = BytesSize(intType)
	}
	return err
}

// String returns a human-readable size in bytes,
// kibibytes, mebibytes, gibibytes, or tebibytes
// (eg. "44kiB", "17MiB").
func (b BytesSize) String() string {
	return units.BytesSize(float64(b))
}