package main

import (
	"context"
	"flag"
	"fmt"
	"os"

	"banger/internal/runtimebundle"
)

func main() {
	if len(os.Args) < 2 {
		usage()
		os.Exit(2)
	}
	switch os.Args[1] {
	case "fetch":
		if err := fetch(os.Args[2:]); err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}
	case "package":
		if err := pkg(os.Args[2:]); err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}
	default:
		usage()
		os.Exit(2)
	}
}

func fetch(args []string) error {
	fs := flag.NewFlagSet("fetch", flag.ContinueOnError)
	fs.SetOutput(os.Stderr)
	manifestPath := fs.String("manifest", "runtime-bundle.toml", "path to the runtime bundle manifest")
	outDir := fs.String("out", "runtime", "destination runtime directory")
	if err := fs.Parse(args); err != nil {
		return err
	}
	manifest, err := runtimebundle.LoadManifest(*manifestPath)
	if err != nil {
		return err
	}
	return runtimebundle.Bootstrap(context.Background(), manifest, *manifestPath, *outDir)
}

func pkg(args []string) error {
	fs := flag.NewFlagSet("package", flag.ContinueOnError)
	fs.SetOutput(os.Stderr)
	manifestPath := fs.String("manifest", "runtime-bundle.toml", "path to the runtime bundle manifest")
	runtimeDir := fs.String("runtime-dir", "runtime", "runtime directory to package")
	outArchive := fs.String("out", "dist/banger-runtime.tar.gz", "output archive path")
	if err := fs.Parse(args); err != nil {
		return err
	}
	manifest, err := runtimebundle.LoadManifest(*manifestPath)
	if err != nil {
		return err
	}
	sum, err := runtimebundle.Package(*runtimeDir, *outArchive, manifest)
	if err != nil {
		return err
	}
	fmt.Println(sum)
	return nil
}

func usage() {
	fmt.Fprintln(os.Stderr, "usage: runtimebundle <fetch|package> [flags]")
}