package webfilesystem

import "go.mongodb.org/mongo-driver/bson/primitive"

func (fs *WebFileSystem) Read(filePath string, fileData interface{}) (*FileHeader, error) {
	fileId, err := fs.FindFile(filePath)
	if err != nil {
		return nil, err
	}

	fileHeader, err := fs.ReadByObjectID(fileId, fileData)
	if err != nil {
		return nil, err
	}

	return fileHeader, nil
}

func (fs *WebFileSystem) ReadByObjectID(fileID primitive.ObjectID, fileData interface{}) (*FileHeader, error) {
	fileHeader, err := fs.readFSDocs(fileID, fileData)
	if err != nil {
		return nil, err
	}

	if fileHeader.Type == "objectlink" {
		objectLinkData := ObjectLinkFileData{}
		_, err := fs.readFSDocs(fileID, &objectLinkData)
		if err != nil {
			return nil, err
		}

		fileHeader, err := fs.readFSDocs(objectLinkData.Link_id, fileData)
		if err != nil {
			return nil, err
		}
		return fileHeader, nil
	}

	return fileHeader, nil
}