// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.tools;

import com.google.common.base.Ascii;
import google.registry.model.EppResource;
import google.registry.model.ForeignKeyUtils;
import google.registry.model.domain.Domain;
import google.registry.model.host.Host;
import google.registry.persistence.VKey;
import java.time.Instant;

/** Container class for static utility methods. */
class CommandUtilities {

  /** A useful parameter enum for commands that operate on {@link EppResource} objects. */
  public enum ResourceType {
    HOST(Host.class),
    DOMAIN(Domain.class);

    private final Class<? extends EppResource> clazz;

    ResourceType(Class<? extends EppResource> clazz) {
      this.clazz = clazz;
    }

    public VKey<? extends EppResource> getKey(String uniqueId, Instant now) {
      return ForeignKeyUtils.loadKey(clazz, uniqueId, now)
          .orElseThrow(
              () ->
                  new IllegalArgumentException(String.format("Invalid resource ID %s", uniqueId)));
    }
  }

  static String addHeader(String header, String body) {
    return String.format("%s:\n%s\n%s", header, "-".repeat(header.length() + 1), body);
  }

  /** Prompts for yes/no input using promptText, defaulting to no. */
  static boolean promptForYes(String promptText) {
    String input = System.console().readLine("%s (y/N): ", promptText);
    // Null represents end-of-file (e.g. ^-D) so interpret that as a negative response.
    return input != null && Ascii.toUpperCase(input).startsWith("Y");
  }
}
