package com.youlai.system.config;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.validator.HibernateValidator;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.validation.beanvalidation.SpringConstraintValidatorFactory;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import java.math.BigInteger;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.TimeZone;

@Configuration
@Slf4j
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = jackson2HttpMessageConverter.getObjectMapper();
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);

        // 后台Long值传递给前端精度丢失问题（JS最大精度整数是Math.pow(2,53)）
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(BigInteger.class, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);

        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
        converters.add(0, jackson2HttpMessageConverter);
    }

    @Bean
    public Validator validator(final AutowireCapableBeanFactory autowireCapableBeanFactory) {
        ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
                .configure()
                .failFast(true) // failFast=true 不校验所有参数，只要出现校验失败情况直接返回，不再进行后续参数校验
                .constraintValidatorFactory(new SpringConstraintValidatorFactory(autowireCapableBeanFactory))
                .buildValidatorFactory();

        return validatorFactory.getValidator();
    }
}