package gitreceive

import (
	"fmt"
)

const (
	slugTGZName = "slug.tgz"
)

// SlugBuilderInfo contains all of the object storage related information needed to pass to a
// slug builder.
type SlugBuilderInfo struct {
	pushKey string
	tarKey  string
}

// NewSlugBuilderInfo creates and populates a new SlugBuilderInfo based on the given data
func NewSlugBuilderInfo(slugName string) *SlugBuilderInfo {
	tarKey := fmt.Sprintf("home/%s/tar", slugName)
	// this is where workflow tells slugrunner to download the slug from, so we have to tell slugbuilder to upload it to here
	pushKey := fmt.Sprintf("home/%s/push", slugName)

	return &SlugBuilderInfo{
		pushKey: pushKey,
		tarKey:  tarKey,
	}
}

// PushKey returns the object storage key that the slug builder will store the slug in.
// The returned value only contains the path to the folder, not including the final filename.
func (s SlugBuilderInfo) PushKey() string { return s.pushKey }

// TarKey returns the object storage key from which the slug builder will download for the tarball
// (from which it uses to build the slug). The returned value only contains the path to the
// folder, not including the final filename.
func (s SlugBuilderInfo) TarKey() string { return s.tarKey }

// AbsoluteSlugObjectKey returns the PushKey plus the final filename of the slug.
func (s SlugBuilderInfo) AbsoluteSlugObjectKey() string { return s.PushKey() + "/" + slugTGZName }

// AbsoluteProcfileKey returns the PushKey plus the standard procfile name.
func (s SlugBuilderInfo) AbsoluteProcfileKey() string { return s.PushKey() + "/Procfile" }