package api

import (
	"net/http"
)

type categoryInput struct {
	Name   string  `json:"name"`
	Parent *string `json:"parent"` // ausente = não move; "" = raiz
}

func (s *Server) handleCreateCategory(w http.ResponseWriter, r *http.Request) {
	var in categoryInput
	if err := decodeJSON(w, r, &in, 1<<20); err != nil {
		return
	}
	parent := ""
	if in.Parent != nil {
		parent = *in.Parent
	}
	c, err := s.st.CreateCategory(in.Name, parent)
	if err != nil {
		mapStoreErrorFor(w, err, "categoria")
		return
	}
	writeJSON(w, http.StatusCreated, c)
}

func (s *Server) handleUpdateCategory(w http.ResponseWriter, r *http.Request) {
	var in categoryInput
	if err := decodeJSON(w, r, &in, 1<<20); err != nil {
		return
	}
	c, err := s.st.UpdateCategory(r.PathValue("id"), in.Name, in.Parent)
	if err != nil {
		mapStoreErrorFor(w, err, "categoria")
		return
	}
	writeJSON(w, http.StatusOK, c)
}

func (s *Server) handleDeleteCategory(w http.ResponseWriter, r *http.Request) {
	if err := s.st.DeleteCategory(r.PathValue("id")); err != nil {
		mapStoreErrorFor(w, err, "categoria")
		return
	}
	w.WriteHeader(http.StatusNoContent)
}