package api

import (
	"net/http"
)

func (s *Server) handleHistoryStatus(w http.ResponseWriter, r *http.Request) {
	_ = r
	writeJSON(w, http.StatusOK, map[string]any{
		"canUndo":      s.history.CanUndo(),
		"canRedo":      s.history.CanRedo(),
		"lastUndoName": s.history.LastUndoName(),
		"lastRedoName": s.history.LastRedoName(),
	})
}

func (s *Server) handleUndo(w http.ResponseWriter, r *http.Request) {
	_ = r
	name := s.history.LastUndoName()
	if err := s.history.Undo(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	s.notify("")
	writeJSON(w, http.StatusOK, map[string]string{"name": name})
}

func (s *Server) handleRedo(w http.ResponseWriter, r *http.Request) {
	_ = r
	name := s.history.LastRedoName()
	if err := s.history.Redo(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	s.notify("")
	writeJSON(w, http.StatusOK, map[string]string{"name": name})
}