// Command tinyforge is a terminal client for a Tinyforge server.
//
// It drives the existing HTTP API: log in to obtain a 24h JWT, then list
// apps, trigger deploys, stream logs, and check status. The token is cached
// in ~/.tinyforge/config.json (mode 0600) so subsequent commands reuse it.
//
// Usage:
//
//	tinyforge login [--user U] [--password P]
//	tinyforge apps [list]
//	tinyforge deploy <app> [--ref TAG] [--note TEXT]
//	tinyforge logs <app> [-f] [--tail N] [--container CID]
//	tinyforge status [<app>]
//	tinyforge logout
//	tinyforge version
//
// The target server is resolved from --base-url, then $TINYFORGE_URL, then the
// saved config, then http://localhost:8080.
package main

import (
	"fmt"
	"os"
)

// version is the CLI build version. Overridable at build time via
// -ldflags "-X main.version=...".
var version = "dev"

func main() {
	if len(os.Args) < 2 {
		usage(os.Stderr)
		os.Exit(2)
	}

	cmd, args := os.Args[1], os.Args[2:]

	var err error
	switch cmd {
	case "login":
		err = runLogin(args)
	case "logout":
		err = runLogout(args)
	case "apps":
		err = runApps(args)
	case "deploy":
		err = runDeploy(args)
	case "logs":
		err = runLogs(args)
	case "status":
		err = runStatus(args)
	case "version", "--version", "-v":
		fmt.Printf("tinyforge %s\n", version)
	case "help", "-h", "--help":
		usage(os.Stdout)
	default:
		fmt.Fprintf(os.Stderr, "tinyforge: unknown command %q\n\n", cmd)
		usage(os.Stderr)
		os.Exit(2)
	}

	if err != nil {
		// Authenticated commands that hit a 401 get a re-login hint; the login
		// command itself surfaces the server message ("invalid credentials").
		if cmd != "login" && isAuthError(err) {
			err = fmt.Errorf("%w — run 'tinyforge login'", err)
		}
		fmt.Fprintf(os.Stderr, "tinyforge: %v\n", err)
		os.Exit(1)
	}
}

func usage(w *os.File) {
	fmt.Fprint(w, `tinyforge — terminal client for a Tinyforge server

Usage:
  tinyforge <command> [flags]

Commands:
  login              Authenticate and cache a token
  logout             Revoke the cached token and clear it
  apps [list]        List your apps (workloads with a source)
  deploy <app>       Trigger a deploy (waits for completion)
  logs <app>         Print container logs (use -f to follow)
  status [<app>]     Show server health, or one app's containers
  version            Print the CLI version

Global flags (accepted by any command):
  --base-url URL     Server URL (default $TINYFORGE_URL or http://localhost:8080)
  --token TOKEN      Auth token (default $TINYFORGE_TOKEN or cached config)
  --config PATH      Config file (default $TINYFORGE_CONFIG or ~/.tinyforge/config.json)

Run "tinyforge <command> -h" for command-specific flags.
`)
}