io

type Downloader interface {
	Download(ctx context.Context, from, to string) (string, error)
}

type Filesystem interface {
	//Detects if the file already links to the appropriate location, which becomes a NOP.
	//If a file exists at the target location, it gets moved to the backup location
	CreateSymlink(from, to, backup string) error
	Stat(name string) (os.FileInfo, error)
	// IsSymlinkTo detects if the file at `from` symlinks to `to`
	IsSymlinkTo(from, to string) (bool, error)
	//Move(from, to string) error
	ReadFile(filename string) ([]byte, error)
}

type LogLevel string

type Logger interface {
	Infof(format string, args ...interface{})
	Warningf(format string, args ...interface{})
	Errorf(format string, args ...interface{})
	Debugf(format string, args ...interface{})
}

type Shell interface {
	Run(ctx context.Context, printOnly bool, cmdLine string) (string, error)
	// Runs `which` on the target shell, to determine if a program exists or not.
	Which(ctx context.Context, search string) (bool, string, error)
}

type Terminal interface {
	Logger
	//PromptUser prompts the user to select any of the given options, with the specific option
	PromptUser(prompt string, options []string, defaultSelection string) (string, error)
	//Tightly coupled interface just so we can moq it
	AskOne(p survey.Prompt, response interface{}, opts ...survey.AskOpt) error
}