package com.jsql.model.injection.strategy;
   
   import com.jsql.model.InjectionModel;
   import com.jsql.model.bean.util.Header;
   import com.jsql.model.bean.util.Interaction;
   import com.jsql.model.bean.util.Request;
   import com.jsql.model.exception.JSqlException;
   import com.jsql.model.exception.StoppedByUserSlidingException;
   import com.jsql.model.suspendable.AbstractSuspendable;
  import com.jsql.util.I18nUtil;
  import com.jsql.util.LogLevelUtil;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import java.util.EnumMap;
  import java.util.Map;
  
  /**
   * Define a strategy to inject SQL with methods like Error and Time.
   */
  public abstract class AbstractStrategy {
  
      /**
       * Log4j logger sent to view.
       */
      private static final Logger LOGGER = LogManager.getRootLogger();
  
      protected static final String KEY_LOG_CHECKING_STRATEGY = "LOG_CHECKING_STRATEGY";
      protected static final String KEY_LOG_VULNERABLE = "LOG_VULNERABLE";
      protected static final String FORMAT_STRATEGY_NOT_IMPLEMENTED = "Strategy [{}] for [{}] not implemented, share a working example to GitHub to speed up release";
      protected static final String FORMAT_SKIP_STRATEGY_DISABLED = "Skipping strategy [{}] disabled";
      protected static final String FORMAT_CHECKING_STRATEGY = "{} [{}]...";
  
      /**
       * True if injection can be used, false otherwise.
       */
      protected boolean isApplicable = false;
  
      protected final InjectionModel injectionModel;
      
      protected AbstractStrategy(InjectionModel injectionModel) {
          this.injectionModel = injectionModel;
      }
  
      /**
       * Test if this strategy can be used to inject SQL.
       */
      public abstract void checkApplicability() throws JSqlException;
      
      /**
       * Inform the view that this strategy can be used.
       */
      protected abstract void allow(int... i);
      
      /**
       * Inform the view that this strategy can't be used.
       */
      protected abstract void unallow(int... i);
      
      /**
       * Start the strategy work.
       * @return Source code
       */
      public abstract String inject(String sqlQuery, String startPosition, AbstractSuspendable stoppable, String metadataInjectionProcess) throws StoppedByUserSlidingException;
      
      /**
       * Change model strategy to current applicable strategy only when not already set.
       * Union > Stacked > Error > Multibit > Blind > Time
       */
      public abstract void activateWhenApplicable();
      
      /**
       * Get number of characters you can obtain from the strategy.
       */
      public abstract String getPerformanceLength();
      
      /**
       * Get the injection strategy name.
       */
      public abstract String getName();
  
      public void logChecking() {
          LOGGER.log(
              LogLevelUtil.CONSOLE_DEFAULT,
              AbstractStrategy.FORMAT_CHECKING_STRATEGY,
              () -> I18nUtil.valueByKey(AbstractStrategy.KEY_LOG_CHECKING_STRATEGY),
              this::getName
          );
      }
      
      public void markVulnerability(Interaction message, int... indexErrorStrategy) {
          var request = new Request();
          request.setMessage(message);
          
          Map<Header, Object> msgHeader = new EnumMap<>(Header.class);
          msgHeader.put(Header.URL, this.injectionModel.getMediatorUtils().getConnectionUtil().getUrlByUser());
          
          // Ellipse default to non null array
          if (indexErrorStrategy.length > 0) {
             msgHeader.put(Header.INDEX_ERROR_STRATEGY, indexErrorStrategy[0]);
             msgHeader.put(Header.INJECTION_MODEL, this.injectionModel);
         }
 
         request.setParameters(msgHeader);
         this.injectionModel.sendToViews(request);
     }
     
     @Override
     public String toString() {
         return this.getName();
     }
 
 
     // Getter and setter
     
     public boolean isApplicable() {
         return this.isApplicable;
     }
     
     public void setApplicable(boolean isApplicable) {
         this.isApplicable = isApplicable;
     }
 }