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package com.litongjava.tio.utils.date;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;

public class DateParseUtils {

  /**
   * Parses an ISO 8601 date string to a java.util.Date object.
   *
   * @param dateString The ISO 8601 date string.
   * @return The parsed Date object.
   */
  public static Date parseIso8601Date(String dateString) {
    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
    formatter.setTimeZone(TimeZone.getTimeZone("UTC")); // Set the formatter to UTC
    try {
      return formatter.parse(dateString);
    } catch (ParseException e) {
      e.printStackTrace();
      return null;
    }
  }

  public static List convertToIso8601Date(List list) {
    List retval = new ArrayList<>(list.size());
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssXXX");

    for (Object object : list) {
      // Parse the input strings to LocalDateTime
      LocalDateTime localTime = LocalDateTime.parse((String) object, formatter);
      OffsetDateTime offsetDateTime = localTime.atOffset(ZoneOffset.UTC);
      retval.add(offsetDateTime);
    }

    return retval;
  }

  public static List convertToIso8601FromDefault(List list) {
    List retval = new ArrayList<>(list.size());
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    for (Object object : list) {
      // Parse the input strings to LocalDateTime
      LocalDateTime localTime = LocalDateTime.parse((String) object, formatter);
      OffsetDateTime offsetDateTime = localTime.atOffset(ZoneOffset.UTC);
      retval.add(offsetDateTime);
    }

    return retval;
  }

  public static OffsetDateTime convertToIso8601Date(String inputValue) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    LocalDateTime localTime = LocalDateTime.parse(inputValue, formatter);
    OffsetDateTime offsetDateTime = localTime.atOffset(ZoneOffset.UTC);
    return offsetDateTime;
  }

  public static OffsetDateTime convertToIso8601FromDefault(String inputValue) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    LocalDateTime localTime = LocalDateTime.parse(inputValue, formatter);
    OffsetDateTime offsetDateTime = localTime.atOffset(ZoneOffset.UTC);
    return offsetDateTime;
  }

  public static OffsetDateTime convertToIso8601FromSecond(Long seconds) {
    Instant instant = Instant.ofEpochSecond(seconds);
    ZoneId zoneId = ZoneId.systemDefault();
    return instant.atZone(zoneId).toOffsetDateTime();
  }

  public static OffsetDateTime convertToIso8601FromSecond(String inputValue) {
    long seconds = Long.parseLong(inputValue);
    return convertToIso8601FromSecond(seconds);
  }

  public static OffsetDateTime convertToIso8601Frommillisecond(String inputValue) {
    long milliseconds = Long.parseLong(inputValue);
    return convertToIso8601Frommillisecond(milliseconds);
  }

  public static OffsetDateTime convertToIso8601Frommillisecond(Long milliseconds) {
    Instant instant = Instant.ofEpochMilli(milliseconds);
    ZoneId zoneId = ZoneId.systemDefault();
    return instant.atZone(zoneId).toOffsetDateTime();
  }

  /**
   * 
   * @param inputValue eg:2024-05-20 06:53:58 +0000 UTC
   * @return
   */
  public static OffsetDateTime parseUTCDateString(String inputValue) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss Z z");
    return OffsetDateTime.parse(inputValue, formatter);
  }
}
 















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