package driver

import (
	"errors"
)

type ContainerDriver interface {
	Pull(string) error
	Start(string, string, string) error
	Stop(string) error
	Exec(containerId string, command string, options CommandOptions) CommandResult
}

// Represents the outcome of a command call made by the driver.
type CommandResult struct {
	// Exit code of the underlying exec.Command call.
	ExitCode int
	// Error (or nil) returned by the attempt to run the command.
	Error error
}

type CommandOptions struct {
	// Directory to run the command from. Equivalent of cd-ing before running.
	Cwd string
	// Map of environment variables exposed in the environment the command runs in.
	// Note: In the case of container drivers, these mappings are applied within the
	//  container.
	Env map[string]string
	// Shell to use when running the command.
	Shell string
}

func NewCommandOptions() CommandOptions {
	return CommandOptions{
		Cwd:   ".",
		Shell: "bash",
		Env:   map[string]string{},
	}
}

func NewDriver(driverType string) (ContainerDriver, error) {
	if driverType == "podman" {
		return &PodmanDriver{}, nil
	}

	return nil, errors.New("Unrecognized driver type.")
}