package units

import (
	"encoding/json"
	"net/http"

	"github.com/food-ai/backend/internal/locale"
)

type unitItem struct {
	Code string `json:"code"`
	Name string `json:"name"`
}

// List handles GET /units — returns units with names in the requested language.
func List(w http.ResponseWriter, r *http.Request) {
	lang := locale.FromContext(r.Context())
	items := make([]unitItem, 0, len(Records))
	for _, u := range Records {
		name, ok := u.Translations[lang]
		if !ok {
			name = u.Code // fallback to English code
		}
		items = append(items, unitItem{Code: u.Code, Name: name})
	}
	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(map[string]any{"units": items})
}