/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.core.impl.idp.auth.data;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.TimeZone;

import javax.annotation.Nullable;

import at.gv.egiz.eaaf.core.api.data.EaafConstants;
import at.gv.egiz.eaaf.core.api.idp.EaafAuthProcessDataConstants;
import at.gv.egiz.eaaf.core.api.idp.auth.data.IAuthProcessDataContainer;
import at.gv.egiz.eaaf.core.api.idp.auth.data.IIdentityLink;
import at.gv.egiz.eaaf.core.exceptions.EaafStorageException;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AuthProcessDataWrapper
    implements IAuthProcessDataContainer, EaafAuthProcessDataConstants {
  private static final Logger log = LoggerFactory.getLogger(AuthProcessDataWrapper.class);

  public final static String PATTERN_ISSUE_INSTANT = "yyyy-MM-dd'T'HH:mm:ss'Z'";

  protected Map<String, Object> authProcessData;

  public AuthProcessDataWrapper(final Map<String, Object> authProcessData) {
    this.authProcessData = authProcessData;

  }

  @Override
  public Date getIssueInstant() {
    return wrapStoredObject(VALUE_ISSUEINSTANT, null, Date.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#getIssueInstant()
   */
  @Override
  public String getIssueInstantString() {
    return buildDateTimeUtcString(
        wrapStoredObject(VALUE_ISSUEINSTANT, null, Date.class));
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setIssueInstant(
   * java.lang.String)
   */
  @Override
  public void setIssueInstant(final String issueInstant) {
    authProcessData.put(VALUE_ISSUEINSTANT,
        buildDateTimeUtcDate(issueInstant));

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setIssueInstant(
   * java.lang.String)
   */
  @Override
  public void setIssueInstant(final Date issueInstant) {
    authProcessData.put(VALUE_ISSUEINSTANT, issueInstant);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#isAuthenticated()
   */
  @Override
  public boolean isAuthenticated() {
    return wrapStoredObject(FLAG_IS_AUTHENTICATED, false, Boolean.class);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setAuthenticated(
   * boolean)
   */
  @Override
  public void setAuthenticated(final boolean authenticated) {
    authProcessData.put(FLAG_IS_AUTHENTICATED, authenticated);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#getIdentityLink()
   */
  @Override
  public IIdentityLink getIdentityLink() {
    return wrapStoredObject(VALUE_IDENTITYLINK, null, IIdentityLink.class);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setIdentityLink(at.
   * gv.egovernment.moa .id.auth.data.IdentityLink)
   */
  @Override
  public void setIdentityLink(final IIdentityLink identityLink) {
    authProcessData.put(VALUE_IDENTITYLINK, identityLink);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#isMandateUsed()
   */
  @Override
  public boolean isMandateUsed() {
    return wrapStoredObject(FLAG_USE_MANDATE, false, Boolean.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setUseMandates(
   * boolean)
   */
  @Override
  public void setUseMandates(final boolean useMandates) {
    authProcessData.put(FLAG_USE_MANDATE, useMandates);

  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#getQAALevel()
   */
  @Override
  public String getQaaLevel() {
    return wrapStoredObject(VALUE_QAALEVEL, null, String.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setQAALevel(java.
   * lang.String)
   */
  @Override
  public void setQaaLevel(final String qaaLevel) {
    authProcessData.put(VALUE_QAALEVEL, qaaLevel);

  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#isForeigner()
   */
  @Override
  public boolean isForeigner() {
    return wrapStoredObject(FLAG_IS_FOREIGNER, false, Boolean.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setForeigner(
   * boolean)
   */
  @Override
  public void setForeigner(final boolean isForeigner) {
    authProcessData.put(FLAG_IS_FOREIGNER, isForeigner);

  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#isOW()
   */
  @Override
  public boolean isOW() {
    return wrapStoredObject(FLAG_IS_ORGANWALTER, false, Boolean.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#setOW(boolean)
   */
  @Override
  public void setOW(final boolean isOW) {
    authProcessData.put(FLAG_IS_ORGANWALTER, isOW);

  }

  @Override
  public boolean isEidProcess() {
    return wrapStoredObject(FLAG_IS_NEW_EID_PROCESS, false, Boolean.class);
  }

  @Override
  public void setEidProcess(final boolean value) {
    authProcessData.put(FLAG_IS_NEW_EID_PROCESS, value);

  }

  /*
   * (non-Javadoc)
   *
   * @see
   * at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#getSessionCreated()
   */
  @Override
  public Date getSessionCreated() {
    return wrapStoredObject(EaafConstants.AUTH_DATA_CREATED, null, Date.class);
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#
   * getGenericSessionDataStorage()
   */
  @Override
  public Map<String, Object> getGenericSessionDataStorage() {
    final Map<String, Object> result = new HashMap<>();
    for (final Map.Entry<String, Object> el : authProcessData.entrySet()) {
      if (el.getKey().startsWith(GENERIC_PREFIX)) {
        result.put(el.getKey().substring(GENERIC_PREFIX.length()), el.getValue());
      }

    }

    return result;
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#
   * getGenericDataFromSession(java.lang. String)
   */
  @Override
  public Object getGenericDataFromSession(final String key) {
    return authProcessData.get(GENERIC_PREFIX + key);
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#
   * getGenericDataFromSession(java.lang. String, java.lang.Class)
   */
  @Override
  public <T> T getGenericDataFromSession(final String key, final Class<T> clazz) {
    return wrapStoredObject(GENERIC_PREFIX + key, null, clazz);
  }

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.auth.data.IAuthenticationSession#
   * setGenericDataToSession(java.lang. String, java.lang.Object)
   */
  @Override
  public void setGenericDataToSession(final String key, final Object object)
      throws EaafStorageException {
    authProcessData.put(GENERIC_PREFIX + key, object);

  }

  protected <T> T wrapStoredObject(final String key, final Object defaultValue,
      final Class<T> clazz) {
    if (StringUtils.isNotEmpty(key)) {
      final Object obj = authProcessData.get(key);
      if (obj != null && clazz.isInstance(obj)) {
        return (T) obj;
      }
    }

    if (defaultValue == null) {
      return null;
    } else if (clazz.isInstance(defaultValue)) {
      return (T) defaultValue;
    } else {
      log.error("DefaultValue: " + defaultValue.getClass().getName() + " is not of Type:"
          + clazz.getName());
      throw new IllegalStateException("DefaultValue: " + defaultValue.getClass().getName()
          + " is not of Type:" + clazz.getName());

    }
  }

  /**
   * Builds a {@link String} dateTime value in UTC from a {@link Date} value.
   *
   * @param date the {@link Date} that should be transformed
   * @return The {@link String} representation of the date in
   *     <code>yyyy-MM-dd'T'HH:mm:ss'Z'</code>, or <code>null</code> if {@link Date} was <code>null</code>
   */
  @Nullable
  public static String buildDateTimeUtcString(@Nullable final Date date) {
    if (date == null) {
      return null;

    }

    final SimpleDateFormat f = new SimpleDateFormat(PATTERN_ISSUE_INSTANT);
    f.setTimeZone(TimeZone.getTimeZone("UTC"));
    return f.format(date.getTime());

  }

  /**
   * Builds a {@link String} dateTime value in UTC from a {@link Date} value.
   *
   * @param date the {@link String} in <code>yyyy-MM-dd'T'HH:mm:ss'Z'</code>
   *     format that should be transformed
   * @return The {@link Date} representation of the date, otherwise <code>null</code>
   *     if input parameter was <code>null</code> or invalid
   */
  @Nullable
  public static Date buildDateTimeUtcDate(@Nullable final String date) {
    final SimpleDateFormat f = new SimpleDateFormat(PATTERN_ISSUE_INSTANT);
    try {
      if (date != null) {
        return f.parse(date);

      }

    } catch (final ParseException e) {
      log.error("Can NOT parse Date from String: {}", date, null, e);

    }

    return null;

  }

}