cli

type App struct {
	Config  *config.Config
	Secrets secret.Store
	Out     io.Writer
	Err     io.Writer

	// ReadPassword prompts for a password without echoing it. It is a field
	// so tests can supply input without a terminal.
	ReadPassword func(prompt string) (string, error)

	// Probe opens a connection and returns the server version. It is a field
	// so the command can be tested without a database.
	Probe func(ctx context.Context, ds *config.DataSource, password string) (string, error)

	// OpenUI connects and runs the terminal interface. It is a field so the
	// dispatch logic can be tested without starting a terminal.
	OpenUI func(ctx context.Context, ds *config.DataSource, password string, cfg *config.Config, opt UIOptions) error
}

type UIOptions struct {
	// WorkDir is the directory of SQL work to attach, from --dir. Empty means
	// the session starts unattached.
	WorkDir string
}

type Wizard struct {
	// Path is where the configuration will be written. An existing file there
	// is never touched.
	Path string
	Out  io.Writer

	// Ask reads one line, returning def when the answer is empty.
	Ask func(prompt, def string) (string, error)
	// Choose picks one of options, returning def when the answer is empty.
	//
	// A def of noDefault means there is nothing to take: the question has to be
	// answered, and an empty answer is asked again rather than resolved.
	Choose func(prompt string, options []string, def int) (int, error)
	// ReadPassword reads without echoing.
	ReadPassword func(prompt string) (string, error)

	Secrets secret.Store
	// Probe opens a connection and returns the server version. The wizard uses
	// the same one `dv check` does, so a datasource it accepts is one that
	// really answered.
	Probe func(ctx context.Context, ds *config.DataSource, password string) (string, error)
}