package view

import (
	"fmt"
	"io/ioutil"
	"local/dndex/storage"
	"local/dndex/storage/entity"
	"local/dndex/storage/operator"
	"net/http"
	"path"

	"github.com/buger/jsonparser"
)

func httpisnow(g storage.Graph, w http.ResponseWriter, r *http.Request) error {
	namespace := path.Base(r.URL.Path)

	b, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return err
	}

	name, err := jsonparser.GetString(b, entity.JSONName)
	if err != nil {
		return fmt.Errorf("cannot find %q: %v", entity.JSONName, err)
	}
	if name == "" {
		http.Error(w, `{"error":"must provide a name"}`, http.StatusBadRequest)
		return nil
	}

	key, err := jsonparser.GetString(b, "set", "key")
	if err != nil {
		return fmt.Errorf("cannot find %q: %v", "set.key", err)
	}
	if key == "" {
		http.Error(w, `{"error":"must provide a set.key"}`, http.StatusBadRequest)
		return nil
	}

	value, err := jsonparser.GetString(b, "set", "value")
	if err != nil {
		return fmt.Errorf("cannot find %q: %v", "set.value", err)
	}

	operator := operator.Set{Key: key, Value: value}

	return g.Update(r.Context(), namespace, entity.One{Name: name}, operator)
}