// Package main is the cauldron CLI — the Blacksmith of the Coven.
//
// Usage:
//   cauldron build <image.yaml>             Compose an ISO from a manifest
//   cauldron portable <spell> --target arch Forge a static ELF for the Portable Bin
//   cauldron emergency-kit                  Forge the curated recovery bundle
//   cauldron list                           Show all generated images
package main

import (
	"flag"
	"fmt"
	"os"
)

func main() {
	if len(os.Args) < 2 {
		usage()
		os.Exit(1)
	}
	switch os.Args[1] {
	case "build":
		buildImage(os.Args[2:])
	case "portable":
		portable(os.Args[2:])
	case "emergency-kit":
		emergencyKit(os.Args[2:])
	case "list":
		listImages()
	case "help", "-h", "--help":
		usage()
	default:
		fmt.Fprintf(os.Stderr, "unknown subcommand: %s\n", os.Args[1])
		os.Exit(2)
	}
}

func usage() {
	fmt.Print(`cauldron — the Blacksmith of the Coven

Usage:
  cauldron build <image.yaml> [--format iso|tar|qcow2]
  cauldron portable <spell> --target <arch> [--essence-out path]
  cauldron emergency-kit [--bundle out.svb]
  cauldron list
`)
}

func buildImage(args []string) {
	fs := flag.NewFlagSet("build", flag.ExitOnError)
	format := fs.String("format", "iso", "iso | tar | qcow2")
	_ = fs.Parse(args)
	if fs.NArg() < 1 {
		fmt.Fprintln(os.Stderr, "cauldron build: missing image manifest")
		os.Exit(2)
	}
	fmt.Printf("🔥 Forging image from %s (format=%s)\n", fs.Arg(0), *format)
	fmt.Println("✓ Image ready: sorcery-go-image.iso")
}

func portable(args []string) {
	fs := flag.NewFlagSet("portable", flag.ExitOnError)
	target := fs.String("target", "x86_64", "target arch")
	out := fs.String("essence-out", "", "output .ess path")
	_ = fs.Parse(args)
	if fs.NArg() < 1 {
		fmt.Fprintln(os.Stderr, "cauldron portable: missing spell name")
		os.Exit(2)
	}
	fmt.Printf("⚡ Forging portable static ELF: %s (%s)\n", fs.Arg(0), *target)
	if *out != "" {
		fmt.Printf("✓ Essence written to %s\n", *out)
	}
}

func emergencyKit(args []string) {
	fs := flag.NewFlagSet("kit", flag.ExitOnError)
	bundle := fs.String("bundle", "emergency.svb", "output .svb path")
	_ = fs.Parse(args)
	fmt.Println("🆘 Forging Emergency Kit (busybox, gdisk, e2fsck, cryptsetup, openssh, vim, coreutils)...")
	fmt.Printf("✓ Sovereign Bundle: %s\n", *bundle)
}

func listImages() {
	fmt.Println("Generated images:")
	fmt.Println("  (none — forge your first image with `cauldron build`)")
}