// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.gerrit.client.api;

import com.google.gerrit.client.Gerrit;
import com.google.gerrit.client.actions.ActionInfo;
import com.google.gerrit.client.changes.ChangeInfo;
import com.google.gerrit.client.rpc.GerritCallback;
import com.google.gerrit.client.rpc.NativeString;
import com.google.gerrit.client.rpc.RestApi;
import com.google.gerrit.common.PageLinks;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;

class DefaultActions {
  static void invoke(ChangeInfo change, ActionInfo action, RestApi api) {
    final Change.Id id = change.legacy_id();
    AsyncCallback<JavaScriptObject> cb = new GerritCallback<JavaScriptObject>() {
      @Override
      public void onSuccess(JavaScriptObject msg) {
        if (NativeString.is(msg)) {
          NativeString str = (NativeString) msg;
          if (!str.asString().isEmpty()) {
            Window.alert(str.asString());
          }
        }
        Gerrit.display(PageLinks.toChange(id));
      }
    };
    invoke(action, api, cb);
  }

  static void invokeProjectAction(final Project.NameKey project,
      ActionInfo action, RestApi api) {
    AsyncCallback<JavaScriptObject> cb = new GerritCallback<JavaScriptObject>() {
      @Override
      public void onSuccess(JavaScriptObject msg) {
        if (NativeString.is(msg)) {
          NativeString str = (NativeString) msg;
          if (!str.asString().isEmpty()) {
            Window.alert(str.asString());
          }
        }
        Gerrit.display(PageLinks.toProject(project));
      }
    };
    invoke(action, api, cb);
  }

  private static void invoke(ActionInfo action, RestApi api,
      AsyncCallback<JavaScriptObject> cb) {
    if ("PUT".equalsIgnoreCase(action.method())) {
      api.put(JavaScriptObject.createObject(), cb);
    } else if ("DELETE".equalsIgnoreCase(action.method())) {
      api.delete(cb);
    } else {
      api.post(JavaScriptObject.createObject(), cb);
    }
  }

  private DefaultActions() {
  }
}