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package nl.vpro.jackson2;

import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.Duration;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import nl.vpro.util.TimeUtils;

@Slf4j
public class XMLDurationToJsonTimestamp {


    public static class Serializer extends JsonSerializer {

        @Override
        public void serialize(Duration value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
            Calendar cal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
            cal.setTimeInMillis(0);
            jgen.writeNumber(value.getTimeInMillis(cal));
        }
    }

    public static class DeserializerDate extends JsonDeserializer {
        @Override
        public Date deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
            return new Date(jp.getLongValue());
        }
    }

    public static class Deserializer extends JsonDeserializer {
        @Override
        public Duration deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
            DatatypeFactory datatypeFactory;
            try {
                datatypeFactory = DatatypeFactory.newInstance();
                return datatypeFactory.newDuration(jp.getLongValue());
            } catch (DatatypeConfigurationException e) {
                log.error(e.getMessage(), e);
            }
            return null;
        }
    }

    public static class SerializerString extends JsonSerializer {

        @Override
        public void serialize(String value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
            java.time.Duration duration = TimeUtils.parseDuration(value).orElse(null);
            if (duration != null) {
                jgen.writeNumber(duration.toMillis());
            } else {
                jgen.writeNull();
            }
        }
    }

    public static class DeserializerJavaDuration extends JsonDeserializer {
        @Override
        public java.time.Duration deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
            return java.time.Duration.ofMillis(jp.getLongValue());
        }
    }
}