// 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.account;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assert_;
import static com.google.gerrit.common.data.GlobalCapability.ACCESS_DATABASE;
import static com.google.gerrit.common.data.GlobalCapability.ADMINISTRATE_SERVER;
import static com.google.gerrit.common.data.GlobalCapability.BATCH_CHANGES_LIMIT;
import static com.google.gerrit.common.data.GlobalCapability.DEFAULT_MAX_BATCH_CHANGES_LIMIT;
import static com.google.gerrit.common.data.GlobalCapability.DEFAULT_MAX_QUERY_LIMIT;
import static com.google.gerrit.common.data.GlobalCapability.PRIORITY;
import static com.google.gerrit.common.data.GlobalCapability.QUERY_LIMIT;
import static com.google.gerrit.common.data.GlobalCapability.RUN_AS;

import com.google.gerrit.acceptance.AbstractDaemonTest;
import com.google.gerrit.acceptance.RestResponse;
import com.google.gerrit.common.data.AccessSection;
import com.google.gerrit.common.data.GlobalCapability;
import com.google.gerrit.common.data.Permission;
import com.google.gerrit.common.data.PermissionRange;
import com.google.gerrit.common.data.PermissionRule;
import com.google.gerrit.server.git.MetaDataUpdate;
import com.google.gerrit.server.git.ProjectConfig;
import com.google.gerrit.server.group.SystemGroupBackend;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import org.apache.http.HttpStatus;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.junit.Test;

import java.io.IOException;

public class CapabilitiesIT extends AbstractDaemonTest {

  @Test
  public void testCapabilitiesUser() throws Exception {
    grantAllCapabilities();
    RestResponse r =
        userSession.get("/accounts/self/capabilities");
    assertThat(r.getStatusCode()).isEqualTo(HttpStatus.SC_OK);
    CapabilityInfo info = (new Gson()).fromJson(r.getReader(),
        new TypeToken<CapabilityInfo>() {}.getType());
    for (String c : GlobalCapability.getAllNames()) {
      if (ADMINISTRATE_SERVER.equals(c)) {
        assertThat(info.administrateServer).isFalse();
      } else if (BATCH_CHANGES_LIMIT.equals(c)) {
        assertThat(info.batchChangesLimit.min).isEqualTo((short) 0);
        assertThat(info.batchChangesLimit.max).isEqualTo((short) DEFAULT_MAX_BATCH_CHANGES_LIMIT);
      } else if (PRIORITY.equals(c)) {
        assertThat(info.priority).isFalse();
      } else if (QUERY_LIMIT.equals(c)) {
        assertThat(info.queryLimit.min).isEqualTo((short) 0);
        assertThat(info.queryLimit.max).isEqualTo((short) DEFAULT_MAX_QUERY_LIMIT);
      } else {
        assert_().withFailureMessage(String.format("capability %s was not granted", c))
          .that((Boolean) CapabilityInfo.class.getField(c).get(info)).isTrue();
      }
    }
  }

  @Test
  public void testCapabilitiesAdmin() throws Exception {
    RestResponse r =
        adminSession.get("/accounts/self/capabilities");
    assertThat(r.getStatusCode()).isEqualTo(HttpStatus.SC_OK);
    CapabilityInfo info = (new Gson()).fromJson(r.getReader(),
        new TypeToken<CapabilityInfo>() {}.getType());
    for (String c : GlobalCapability.getAllNames()) {
      if (BATCH_CHANGES_LIMIT.equals(c)) {
        // It does not have default value for any user as it can override the
        // 'receive.batchChangesLimit'. It needs to be granted explicitly.
        assertThat(info.batchChangesLimit).isNull();
      } else if (PRIORITY.equals(c)) {
        assertThat(info.priority).isFalse();
      } else if (QUERY_LIMIT.equals(c)) {
        assert_().withFailureMessage("missing queryLimit")
          .that(info.queryLimit).isNotNull();
        assertThat(info.queryLimit.min).isEqualTo((short) 0);
        assertThat(info.queryLimit.max).isEqualTo((short) DEFAULT_MAX_QUERY_LIMIT);
      } else if (ACCESS_DATABASE.equals(c)) {
        assertThat(info.accessDatabase).isFalse();
      } else if (RUN_AS.equals(c)) {
        assertThat(info.runAs).isFalse();
      } else {
        assert_().withFailureMessage(String.format("capability %s was not granted", c))
          .that((Boolean) CapabilityInfo.class.getField(c).get(info)).isTrue();
      }
    }
  }

  /**
   * Grant all global capabilities except ADMINISTRATE_SERVER and PRIORITY.
   * Set the default ranges for range permissions.
   */
  private void grantAllCapabilities() throws IOException,
      ConfigInvalidException {
    MetaDataUpdate md = metaDataUpdateFactory.create(allProjects);
    md.setMessage("Make super user");
    ProjectConfig config = ProjectConfig.read(md);
    AccessSection s = config.getAccessSection(
        AccessSection.GLOBAL_CAPABILITIES);
    for (String c : GlobalCapability.getAllNames()) {
      if (ADMINISTRATE_SERVER.equals(c) || PRIORITY.equals(c)) {
        continue;
      }
      Permission p = s.getPermission(c, true);
      PermissionRule rule = new PermissionRule(
          config.resolve(SystemGroupBackend.getGroup(
              SystemGroupBackend.REGISTERED_USERS)));
      if (GlobalCapability.hasRange(c)) {
        PermissionRange.WithDefaults range = GlobalCapability.getRange(c);
        if (range != null) {
          rule.setRange(range.getDefaultMin(), range.getDefaultMax());
        }
      }
      p.add(rule);
    }
    config.commit(md);
    projectCache.evict(config.getProject());
  }
}