package yg;

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Smses2Json {
  private static final ObjectMapper JACKSON = new ObjectMapper();
  private static final Pattern XML_ENTITY_PATTERN = Pattern.compile("&#(\\d+);");

  public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException {
    List<XmlMessage> messages = Arrays.asList(JACKSON.readValue(new File(args[0]), XmlMessage[].class));

    Backup backup = new Backup();
    backup.setMessages(messages
        .stream()
        .map(x -> new Message(
            x.getProtocol(), x.getAddress(), x.getDate(),
            x.getType() == 1 ? x.getDate() : 0, // a date for an SMS received; 0 for an SMS sent
            x.getType(), x.getBody(), x.getRead() == 1, x.getStatus(), x.getLocked() == 1,
            x.getType() == 1 ? 1 : -1)) // 1 for an SMS received; −1 for an SMS sent
        .peek(msg -> {
            Matcher matcher = XML_ENTITY_PATTERN.matcher(msg.getBody());
            msg.setBody(matcher.replaceAll(match -> {
              return new StringBuilder().appendCodePoint(Integer.valueOf(match.group(1))).toString();
            }));
          })
        .collect(Collectors.toList()));
    backup.setMessageCount(backup.getMessages().size());

    if (args.length == 1) {
      JACKSON.writeValue(System.out, backup);
    } else {
      JACKSON.writeValue(new File(args[1]), backup);
    }
  }
}