package cli

import (
	"errors"
	"flag"
	"fmt"
	"io"
	"os"

	"werkdock/internal/store"
)

// loadCmd is `docker load`: a `docker save` archive or an OCI image
// layout into the store, layers flattened, metadata kept (RFC 0004).
// --name still routes a plain rootfs archive to import, for the callers
// that predate `werkdock import` (Werkator), with a note.
func loadCmd(args []string) int {
	fs := flag.NewFlagSet("load", flag.ContinueOnError)
	fs.SetOutput(io.Discard)
	var input, name string
	fs.StringVar(&input, "i", "", "image archive to load")
	fs.StringVar(&input, "input", "", "image archive to load")
	fs.StringVar(&name, "name", "", "image reference for a rootfs archive (deprecated; use werkdock import)")
	if err := fs.Parse(args); err != nil {
		return fail(err)
	}
	if input == "" {
		return fail(errors.New("load needs -i ARCHIVE"))
	}
	if len(fs.Args()) != 0 {
		return fail(fmt.Errorf("unexpected argument %q", fs.Args()[0]))
	}
	if name != "" {
		fmt.Fprintf(os.Stderr, "werkdock: load --name imports a rootfs archive; prefer: werkdock import %s %s\n", input, name)
		return importArchive(input, name, store.ImageConfig{})
	}
	st, err := store.Default()
	if err != nil {
		return fail(err)
	}
	loaded, err := st.Load(input, "")
	if err != nil {
		return fail(err)
	}
	for _, ref := range loaded {
		fmt.Printf("Loaded image: %s\n", ref)
	}
	return 0
}