package com.jsql.view.swing.dialog.translate;
   
   import com.jsql.util.ConnectionUtil;
   import com.jsql.util.I18nUtil;
   import com.jsql.util.LogLevelUtil;
   import com.jsql.util.PropertiesUtil;
   import com.jsql.view.swing.dialog.DialogTranslate;
   import com.jsql.view.swing.util.MediatorHelper;
   import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import javax.swing.*;
  import java.io.IOException;
  import java.io.StringReader;
  import java.net.URISyntaxException;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  import java.util.Properties;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  public class SwingWorkerGithubLocale extends SwingWorker<Object, Object> {
      
      /**
       * Log4j logger sent to view.
       */
      private static final Logger LOGGER = LogManager.getRootLogger();
      
      private final Properties propertiesLanguageToTranslate = new Properties();
      private final OrderedProperties propertiesRoot = new OrderedProperties();
      private final StringBuilder propertiesToTranslate = new StringBuilder();
      private final DialogTranslate dialogTranslate;
      
      private final ConnectionUtil connectionUtil = MediatorHelper.model().getMediatorUtils().getConnectionUtil();
      private final PropertiesUtil propertiesUtil = MediatorHelper.model().getMediatorUtils().getPropertiesUtil();
      
      private static final String LINE_FEED_ESCAPE = "{@|@}";
      private static final String LINE_FEED = "\\\\[\n\r]+";
      
      public SwingWorkerGithubLocale(DialogTranslate dialogTranslate) {
          this.dialogTranslate = dialogTranslate;
      }
  
      @Override
      protected Object doInBackground() throws Exception {
          
          Thread.currentThread().setName("SwingWorkerDialogTranslate");
          
          this.dialogTranslate.getProgressBarTranslation().setVisible(this.dialogTranslate.getLanguage() != Language.OT);
          
          try {
              this.loadFromGithub();
          } catch (IOException eGithub) {
              this.logFileNotFound(eGithub);
          } finally {
              this.displayDiff();
          }
          
          return null;
      }
  
      private void displayDiff() {
          
          this.propertiesRoot.entrySet()
              .stream()
              .filter(key ->
                  this.dialogTranslate.getLanguage() == Language.OT
                  || this.propertiesLanguageToTranslate.isEmpty()
                  || !this.propertiesLanguageToTranslate.containsKey(key.getKey())
              )
              .forEach(key -> this.propertiesToTranslate.append(
                  String.format(
                      "%n%n%s=%s",
                      key.getKey(),
                      key.getValue().replace(LINE_FEED_ESCAPE,"\\\n")
                  )
              ));
          
          this.dialogTranslate.setTextBeforeChange(this.propertiesToTranslate.toString().trim());
          
          this.dialogTranslate.getButtonSend().setEnabled(true);
          this.dialogTranslate.getTextToTranslate().setText(this.dialogTranslate.getTextBeforeChange());
          this.dialogTranslate.getTextToTranslate().setCaretPosition(0);
          this.dialogTranslate.getTextToTranslate().setEditable(true);
          
          if (this.dialogTranslate.getLanguage() != Language.OT) {
              
              int percentTranslated = 100 * this.propertiesLanguageToTranslate.size() / this.propertiesRoot.size();
              this.dialogTranslate.getProgressBarTranslation().setValue(percentTranslated);
              this.dialogTranslate.getProgressBarTranslation().setString(
                  String.format(
                       "%s%% translated into %s",
                       percentTranslated,
                       this.dialogTranslate.getLanguage()
                  )
              );
          }
      }
 
     private void loadFromGithub() throws IOException, URISyntaxException {
         
         this.loadRootFromGithub();
         
         if (this.dialogTranslate.getLanguage() != Language.OT) {
             this.loadLanguageFromGithub();
         } else {
             LOGGER.log(LogLevelUtil.CONSOLE_INFORM, () -> I18nUtil.valueByKey("LOG_I18N_DEFAULT_LOADED"));
         }
     }
 
     private void logFileNotFound(IOException eGithub) throws IOException {
         if (this.propertiesLanguageToTranslate.isEmpty()) {
             LOGGER.log(LogLevelUtil.CONSOLE_INFORM, "Language file not found, text to translate loaded from local", eGithub);
         } else if (this.propertiesRoot.isEmpty()) {
             throw new IOException("Reference language not found");
         }
     }
     
     private void loadRootFromGithub() throws IOException, URISyntaxException {
         try {
             String pageSourceRoot = this.connectionUtil.getSourceLineFeed(
                 this.propertiesUtil.getProperties().getProperty("github.webservice.i18n.root")
             );
             
             String pageSourceRootFixed = Pattern.compile(LINE_FEED).matcher(Matcher.quoteReplacement(pageSourceRoot)).replaceAll(LINE_FEED_ESCAPE);
             
             this.propertiesRoot.load(new StringReader(pageSourceRootFixed));
             
             LOGGER.log(LogLevelUtil.CONSOLE_INFORM, () -> I18nUtil.valueByKey("LOG_I18N_ROOT_LOADED"));
             
         } catch (IOException e) {
             
             var uri = ClassLoader.getSystemResource("i18n/jsql.properties").toURI();
             var path = Paths.get(uri);
             byte[] root = Files.readAllBytes(path);
             var rootI18n = new String(root, StandardCharsets.UTF_8);
             String rootI18nFixed = Pattern.compile(LINE_FEED).matcher(Matcher.quoteReplacement(rootI18n)).replaceAll(LINE_FEED_ESCAPE);
             
             this.propertiesRoot.load(new StringReader(rootI18nFixed));
             LOGGER.log(LogLevelUtil.CONSOLE_INFORM, "Reference language loaded from local");
             
             LOGGER.log(LogLevelUtil.IGNORE, e);
         }
     }
     
     private void loadLanguageFromGithub() throws IOException, URISyntaxException {
         try {
             String pageSourceLanguage = this.connectionUtil.getSourceLineFeed(
                 String.format(
                     "%sjsql_%s.properties",
                     this.propertiesUtil.getProperties().getProperty("github.webservice.i18n.locale"),
                     this.dialogTranslate.getLanguage().getLabelLocale()
                 )
             );
             
             this.propertiesLanguageToTranslate.load(new StringReader(pageSourceLanguage));
             
             LOGGER.log(
                 LogLevelUtil.CONSOLE_INFORM,
                 "{} {}",
                 () -> I18nUtil.valueByKey("LOG_I18N_TEXT_LOADED"),
                 this.dialogTranslate::getLanguage
             );
         } catch (IOException e) {
             
             var uri = ClassLoader.getSystemResource(String.format(
                     "i18n/jsql_%s.properties",
                     this.dialogTranslate.getLanguage().getLabelLocale()
                 ))
                 .toURI();
             
             var path = Paths.get(uri);
             byte[] root = Files.readAllBytes(path);
             var localeI18n = new String(root, StandardCharsets.UTF_8);
             String localeI18nFixed = Pattern.compile(LINE_FEED).matcher(localeI18n).replaceAll(LINE_FEED_ESCAPE);
             
             this.propertiesLanguageToTranslate.load(new StringReader(localeI18nFixed));
             LOGGER.log(
                 LogLevelUtil.CONSOLE_INFORM,
                 String.format(
                     "%s translation loaded from local",
                     this.dialogTranslate.getLanguage()
                 )
             );
             
             LOGGER.log(LogLevelUtil.IGNORE, e);
         }
     }
 }