package categories

import (
	"encoding/json"
	"gis/app"
	"net/http"
)

func listCategoriesRoute(application *app.App) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")

		rows, err := application.Db.Query(application.Ctx, "SELECT id, name FROM categories")
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		defer rows.Close()

		cats := make([]Category, 0)
		for rows.Next() {
			var c Category
			if err := rows.Scan(&c.ID, &c.Name); err != nil {
				w.WriteHeader(http.StatusInternalServerError)
				return
			}
			cats = append(cats, c)
		}
		if err := rows.Err(); err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		if err := json.NewEncoder(w).Encode(map[string][]Category{"data": cats}); err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
	}
}