Refactor CLI for testability and implement hermetic config path injection

1 files changed, 114 insertions, 0 deletions

diff --git a/internal/cli/cli.go b/internal/cli/cli.go
new file mode 100644
index 0000000..cb95202
--- /dev/null
+++ b/internal/cli/cli.go
@@ -0,0 +1,114 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+
+	"git.theodohertyfamily.com/tools/wg-wrap/internal/config"
+)
+
+type App struct {
+	Args      []string
+	ConfigDir string // Optional override for profile storage location
+}
+
+func NewApp(args []string) *App {
+	return &App{Args: args}
+}
+
+func (a *App) Run() error {
+	// Handle subcommands first (profile list, import, configure, delete, stop)
+	if len(a.Args) > 1 && a.Args[1] == "profile" {
+		return a.handleProfileCmd()
+	}
+
+	cfg := &config.Config{}
+
+	fs := flag.NewFlagSet("wg-wrap", flag.ExitOnError)
+	fs.StringVar(&cfg.Profile, "profile", "", "WireGuard profile to use (filename without extension in ~/.config/wg-wrap/profiles/)")
+	fs.StringVar(&cfg.DNSServer, "dns-server", "", "Override DNS server to use")
+
+	args := a.Args[1:]
+	sepIdx := -1
+	for i, arg := range args {
+		if arg == "--" {
+			sepIdx = i
+			break
+		}
+	}
+
+	var flagsToParse []string
+	if sepIdx != -1 {
+		flagsToParse = args[:sepIdx]
+		cfg.Command = args[sepIdx+1:]
+	} else {
+		flagsToParse = args
+	}
+
+	err := fs.Parse(flagsToParse)
+	if err != nil {
+		return fmt.Errorf("error parsing flags: %w", err)
+	}
+
+	if sepIdx == -1 {
+		cfg.Command = fs.Args()
+	}
+
+	if len(cfg.Command) == 0 {
+		return fmt.Errorf("no command provided. use --help for usage")
+	}
+
+	if cfg.Profile == "" {
+		cfg.Profile = "default"
+	}
+
+	profilesDir := a.ConfigDir
+	if profilesDir == "" {
+		profilesDir = config.GetDefaultProfilesDir()
+	}
+
+	fmt.Printf("Profile: %s\n", cfg.Profile)
+	fmt.Printf("Profiles Directory: %s\n", profilesDir)
+	fmt.Printf("DNS Server: %s\n", cfg.DNSServer)
+	fmt.Printf("Command: %v\n", cfg.Command)
+	return nil
+}
+
+func (a *App) handleProfileCmd() error {
+	if len(a.Args) < 3 {
+		return fmt.Errorf("usage: wg-wrap profile <list|import|configure|delete|stop> [args]")
+	}
+
+	subCmd := a.Args[2]
+	switch subCmd {
+	case "list":
+		fmt.Println("Listing profiles...")
+		return fmt.Errorf("profile list not yet implemented")
+	case "import":
+		if len(a.Args) < 4 {
+			return fmt.Errorf("usage: wg-wrap profile import <path>")
+		}
+		fmt.Printf("Importing profile from %s...\n", a.Args[3])
+		return fmt.Errorf("profile import not yet implemented")
+	case "configure":
+		if len(a.Args) < 4 {
+			return fmt.Errorf("usage: wg-wrap profile configure <name>")
+		}
+		fmt.Printf("Configuring profile %s...\n", a.Args[3])
+		return fmt.Errorf("profile configure not yet implemented")
+	case "delete":
+		if len(a.Args) < 4 {
+			return fmt.Errorf("usage: wg-wrap profile delete <name>")
+		}
+		fmt.Printf("Deleting profile %s...\n", a.Args[3])
+		return fmt.Errorf("profile delete not yet implemented")
+	case "stop":
+		if len(a.Args) < 4 {
+			return fmt.Errorf("usage: wg-wrap profile stop <name>")
+		}
+		fmt.Printf("Stopping profile %s and unpinning namespace...\n", a.Args[3])
+		return fmt.Errorf("profile stop not yet implemented")
+	default:
+		return fmt.Errorf("unknown profile subcommand: %s", subCmd)
+	}
+}