package system

import (
	"numenor-labs.us/dsfx/internal/lib/disk"
)

type System interface {
	// Args returns the command-line arguments passed to the program.
	Args() []string
	// Arg returns the command-line argument at the specified index.
	Arg(int) string
	// UserHomeDir returns the user's home directory.
	UserHomeDir() (string, error)
	// UserConfigDir returns the user's configuration directory.
	UserConfigDir() (string, error)
	// UserCacheDir returns the user's cache directory.
	UserCacheDir() (string, error)
	// Stdout returns the standard output file.
	Stdout() disk.File
	// Stderr returns the standard error file.
	Stderr() disk.File
	// TempDir returns the directory used for temporary files.
	TempDir() string
	// Exit terminates the program with the given exit code.
	Exit(int)
	// GetEnv retrieves the value of the environment variable named by key.
	GetEnv(key string) string
	// SetEnv sets the value of the environment variable named by key to value.
	SetEnv(key, value string) error
}