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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you 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 org.openqa.selenium;

import org.openqa.selenium.logging.LogLevelMapping;
import org.openqa.selenium.logging.LoggingPreferences;

import java.util.Collection;
import java.util.Comparator;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.Stream;

class SharedCapabilitiesMethods {

  private SharedCapabilitiesMethods() {
    // Utility class
  }

  static int hashCode(Capabilities caps) {
    return caps.getCapabilityNames().stream()
      .sorted()
      .mapToInt(name -> Objects.hash(name, caps.getCapability(name)))
      .reduce(0, (l, r) -> l ^ r);
  }

  static boolean equals(Capabilities left, Capabilities right) {
    return left.hashCode() == right.hashCode();
  }

  static void setCapability(Map caps, String key, Object value) {
    if ("loggingPrefs".equals(key) && value instanceof Map) {
      LoggingPreferences prefs = new LoggingPreferences();
      @SuppressWarnings("unchecked") Map prefsMap = (Map) value;

      prefsMap.forEach((pKey, pValue) -> prefs.enable(pKey, LogLevelMapping.toLevel(pValue)));
      caps.put(key, prefs);
      return;
    }

    if ("platformName".equals(key) && value instanceof String) {
      try {
        caps.put(key, Platform.fromString((String) value));
      } catch (WebDriverException e) {
        caps.put(key, value);
      }
      return;
    }

    if ("unexpectedAlertBehaviour".equals(key)) {
      caps.put("unexpectedAlertBehaviour", value);
      caps.put("unhandledPromptBehavior", value);
      return;
    }

    caps.put(key, value);
  }

  static String toString(Capabilities caps) {
    Map seen = new IdentityHashMap<>();
    return "Capabilities " + abbreviate(seen, caps.asMap());
  }

  private static String abbreviate(Map seen, Object stringify) {
    if (stringify == null) {
      return "null";
    }

    StringBuilder value = new StringBuilder();

    if (stringify.getClass().isArray()) {
      value.append("[");
      value.append(
        Stream.of((Object[]) stringify)
          .map(item -> abbreviate(seen, item))
          .collect(Collectors.joining(", ")));
      value.append("]");
    } else if (stringify instanceof Collection) {
      value.append("[");
      value.append(
        ((Collection) stringify).stream()
          .map(item -> abbreviate(seen, item))
          .collect(Collectors.joining(", ")));
      value.append("]");
    } else if (stringify instanceof Map) {
      value.append("{");
      value.append(
        ((Map) stringify).entrySet().stream()
          .sorted(Comparator.comparing(entry -> String.valueOf(entry.getKey())))
          .map(entry -> String.format("%s: %s", entry.getKey(), abbreviate(seen, entry.getValue())))
          .collect(Collectors.joining(", ")));
      value.append("}");
    } else {
      String s = String.valueOf(stringify);
      if (s.length() > 30) {
        value.append(s, 0, 27).append("...");
      } else {
        value.append(s);
      }
    }

    seen.put(stringify, value.toString());
    return value.toString();
  }


}