package com.hanserwei.common.config;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.TimeZone;

@Configuration
public class JacksonConfig {

    @Bean
    public ObjectMapper objectMapper() {
        // 初始化一个 ObjectMapper 对象，用于自定义 Jackson 的行为
        ObjectMapper objectMapper = new ObjectMapper();
		
		// 忽略未知字段（前端有传入某个字段，但是后端未定义接受该字段值，则一律忽略掉）
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
		
        // JavaTimeModule 用于指定序列化和反序列化规则
        JavaTimeModule javaTimeModule = new JavaTimeModule();

        // 支持 LocalDateTime、LocalDate、LocalTime
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
        javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));

        objectMapper.registerModule(javaTimeModule);

        // 设置时区
        objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));

        // 设置凡是为 null 的字段，返参中均不返回，请根据项目组约定是否开启
        // objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);

        return objectMapper;
    }
}