package cyclone.lunchvoting.config;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.datatype.hibernate5.Hibernate5Module;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

@Configuration
public class JacksonConfiguration {
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss");

    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        // http://lewandowski.io/2016/02/formatting-java-time-with-spring-boot-using-json/
        // I hope there is an easier way to set global time format
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalTime.class, new JsonSerializer<LocalTime>() {
            @Override
            public void serialize(LocalTime localTime, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
                jsonGenerator.writeString(localTime.format(TIME_FORMATTER));
            }
        });
        javaTimeModule.addDeserializer(LocalTime.class, new JsonDeserializer<LocalTime>() {
            @Override
            public LocalTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
                return LocalTime.parse(jsonParser.getValueAsString(), TIME_FORMATTER);
            }
        });


        objectMapper.registerModule(javaTimeModule);
        objectMapper.registerModule(new Hibernate5Module());
        return objectMapper;
    }
}