/*
 * Copyright 2012-present Facebook, Inc.
 *
 * 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.facebook.buck.android;

import com.facebook.buck.step.ExecutionContext;
import com.facebook.buck.shell.ShellStep;
import com.facebook.buck.util.KeystoreProperties;
import com.facebook.buck.util.ProjectFilesystem;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.io.IOException;

public class ReadKeystorePropertiesAndSignApkStep extends ShellStep {

  private final String pathToKeystorePropertiesFile;
  private final String unsignedApk;
  private final String outputPath;
  private final ProjectFilesystem projectFilesystem;

  /** This will be initialized during {@link #setup(com.facebook.buck.step.ExecutionContext)}. */
  private SignApkStep signApkCommand;

  public ReadKeystorePropertiesAndSignApkStep(
      String pathToKeystorePropertiesFile,
      String unsignedApk,
      String outputPath,
      ProjectFilesystem projectFilesystem) {
    super(String.format("sign %s using the values in %s",
        unsignedApk,
        pathToKeystorePropertiesFile));
    this.pathToKeystorePropertiesFile = Preconditions.checkNotNull(pathToKeystorePropertiesFile);
    this.unsignedApk = Preconditions.checkNotNull(unsignedApk);
    this.outputPath = Preconditions.checkNotNull(outputPath);
    this.projectFilesystem = Preconditions.checkNotNull(projectFilesystem);
  }

  @Override
  public void setup(ExecutionContext context) throws IOException {
    KeystoreProperties keystoreProperties = KeystoreProperties.createFromPropertiesFile(
        pathToKeystorePropertiesFile, projectFilesystem);
    this.signApkCommand = new SignApkStep(outputPath,
        unsignedApk,
        keystoreProperties.getKeystore(),
        keystoreProperties.getStorepass(),
        keystoreProperties.getKeypass(),
        keystoreProperties.getAlias());
  }

  @Override
  public String getShortName(ExecutionContext context) {
    return "sign apk";
  }

  @Override
  protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
    Preconditions.checkNotNull(signApkCommand,
        "setup() must be invoked before shell command args are returned.");
    return signApkCommand.getShellCommand(context);
  }

  @VisibleForTesting
  SignApkStep getSignApkCommand() {
    return signApkCommand;
  }
}