package at.gv.egiz.eaaf.core.impl.idp.controller.tasks;

import java.io.Serializable;

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

import at.gv.egiz.eaaf.core.api.data.EaafConstants;
import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.exceptions.TaskExecutionException;
import at.gv.egiz.eaaf.core.impl.idp.auth.modules.AbstractAuthServletTask;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

public abstract class AbstractLocaleAuthServletTask extends AbstractAuthServletTask {
  private static final Logger log = LoggerFactory.getLogger(AbstractLocaleAuthServletTask.class);

  public static final String PROP_REQ_PARAM_LOCALE = "lang";

  @Override
  public final void execute(final ExecutionContext executionContext,
      final HttpServletRequest request, final HttpServletResponse response)
      throws TaskExecutionException {

    final Serializable changeLangFlag =
        executionContext.get(EaafConstants.PROCESSCONTEXT_SWITCH_LANGUAGE);
    final String localeParam =
        StringEscapeUtils.escapeHtml4(request.getParameter(PROP_REQ_PARAM_LOCALE));
    if (StringUtils.isNotEmpty(localeParam)
        && (changeLangFlag == null || !((Boolean) changeLangFlag))) {
      log.debug("Find {} parameter. Reload last task with new locale: {}", PROP_REQ_PARAM_LOCALE,
          localeParam);
      executionContext.put(EaafConstants.PROCESSCONTEXT_SWITCH_LANGUAGE, true);

    } else {
      log.trace("Find {} parameter. Processing this task ... ", PROP_REQ_PARAM_LOCALE);
      executionContext.put(EaafConstants.PROCESSCONTEXT_SWITCH_LANGUAGE, false);

      if (parseFlagFromHttpRequest(request, EaafConstants.PARAM_HTTP_STOP_PROCESS, false)) {
        log.info("Authentication process WAS stopped by entity. Stopping auth. process ... ");
        stopProcessFromUserDecision(executionContext, request, response);

      } else {
        executeWithLocale(executionContext, request, response);
      }

    }

  }

  protected boolean parseFlagFromHttpRequest(final HttpServletRequest httpReq,
      final String httpParamName, final boolean defaultValue) {
    final String flag = httpReq.getParameter(httpParamName);
    log.trace("Get httpParam: {} with value: {}", httpParamName, flag);
    if (StringUtils.isNotEmpty(httpParamName)) {
      return Boolean.parseBoolean(flag);

    } else {
      return defaultValue;
    }

  }

  protected abstract void executeWithLocale(ExecutionContext executionContext,
      HttpServletRequest request, HttpServletResponse response) throws TaskExecutionException;

}