package cmd

import (
	"fmt"

	"github.com/lerko/nib/internal/db"
	"github.com/lerko/nib/internal/display"
	"github.com/spf13/cobra"
)

var absorbCmd = &cobra.Command{
	Use:   "absorb <target> <source>",
	Short: "pull source material into target, ghost the source",
	Args:  cobra.ExactArgs(2),
	RunE:  runAbsorb,
}

func init() {
	rootCmd.AddCommand(absorbCmd)
}

func runAbsorb(cmd *cobra.Command, args []string) error {
	store, err := openStore()
	if err != nil {
		return err
	}
	defer store.Close()

	targetID, err := store.Resolve(cmd.Context(), args[0])
	if err != nil {
		return fmt.Errorf("not_found — no entity with id %s", args[0])
	}

	sourceID, err := store.Resolve(cmd.Context(), args[1])
	if err != nil {
		return fmt.Errorf("not_found — no entity with id %s", args[1])
	}

	if targetID == sourceID {
		return fmt.Errorf("target and source must be different entities")
	}

	if err := store.Absorb(cmd.Context(), targetID, sourceID); err != nil {
		if err == db.ErrTargetCrystallized {
			return fmt.Errorf("invalid_absorb — target %s is crystallized, demote first",
				display.FormatID(targetID))
		}
		return err
	}

	fmt.Printf("absorbed %s → %s\n", display.FormatID(sourceID), display.FormatID(targetID))
	return nil
}