// 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.acceptance.rest.project;

import static com.google.gerrit.server.group.SystemGroupBackend.ANONYMOUS_USERS;
import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
import static com.google.gerrit.server.project.Util.block;
import static org.junit.Assert.fail;

import com.google.gerrit.acceptance.AbstractDaemonTest;
import com.google.gerrit.acceptance.NoHttpd;
import com.google.gerrit.common.data.Permission;
import com.google.gerrit.extensions.api.projects.BranchApi;
import com.google.gerrit.extensions.api.projects.BranchInput;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.reviewdb.client.Branch;
import com.google.gerrit.server.git.ProjectConfig;

import org.junit.Before;
import org.junit.Test;

@NoHttpd
public class DeleteBranchIT extends AbstractDaemonTest {

  private Branch.NameKey branch;

  @Before
  public void setUp() throws Exception {
    branch = new Branch.NameKey(project, "test");
    branch().create(new BranchInput());
  }

  @Test
  public void deleteBranch_Forbidden() throws Exception {
    setApiUser(user);
    assertDeleteForbidden();
  }

  @Test
  public void deleteBranchByAdmin() throws Exception {
    assertDeleteSucceeds();
  }

  @Test
  public void deleteBranchByProjectOwner() throws Exception {
    grantOwner();
    setApiUser(user);
    assertDeleteSucceeds();
  }

  @Test
  public void deleteBranchByAdminForcePushBlocked() throws Exception {
    blockForcePush();
    assertDeleteSucceeds();
  }

  @Test
  public void deleteBranchByProjectOwnerForcePushBlocked_Forbidden()
      throws Exception {
    grantOwner();
    blockForcePush();
    setApiUser(user);
    assertDeleteForbidden();
  }

  private void blockForcePush() throws Exception {
    ProjectConfig cfg = projectCache.checkedGet(allProjects).getConfig();
    block(cfg, Permission.PUSH, ANONYMOUS_USERS, "refs/heads/*").setForce(true);
    saveProjectConfig(allProjects, cfg);
  }

  private void grantOwner() throws Exception {
    allow(Permission.OWNER, REGISTERED_USERS, "refs/*");
  }

  private BranchApi branch() throws Exception {
    return gApi.projects()
        .name(branch.getParentKey().get())
        .branch(branch.get());
  }

  private void assertDeleteSucceeds() throws Exception {
    branch().delete();
    try {
      branch().get();
      fail("Expected ResourceNotFoundException");
    } catch (ResourceNotFoundException expected) {
      // Expected.
    }
  }

  private void assertDeleteForbidden() throws Exception {
    try {
      branch().delete();
      fail("Expected AuthException");
    } catch (AuthException expected) {
      // Expected.
    }
    branch().get();
  }
}