package com.xly.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

/**
 * 全局 ObjectMapper 配置：支持 LocalDate 序列化/反序列化
 */
@Configuration
public class JacksonConfig {

    /**
     * 配置好的 ObjectMapper：注册 JavaTimeModule，支持 Java 8 时间类型
     */
    @Bean
    @Primary // 标记为默认实例，避免多 ObjectMapper 冲突
    public ObjectMapper objectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        // 1. 核心：注册 JSR310 模块，处理 LocalDate/LocalDateTime
        mapper.registerModule(new JavaTimeModule());
        // 2. 关闭时间戳序列化，LocalDate 以 "yyyy-MM-dd" 字符串形式存储
        mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        // 3. 忽略未知字段（AI 返回多余字段时不报错）
        mapper.configure(com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        return mapper;
    }
}