package com.ruoyi.common.utils;

import cn.hutool.core.util.ArrayUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * JSON 工具类
 *
 * @author 芋道源码
 */
public class JsonUtils {

    private static ObjectMapper objectMapper = new ObjectMapper();

    /**
     * 初始化 objectMapper 属性
     * <p>
     * 通过这样的方式，使用 Spring 创建的 ObjectMapper Bean
     *
     * @param objectMapper ObjectMapper 对象
     */
    public static void init(ObjectMapper objectMapper) {
        JsonUtils.objectMapper = objectMapper;
    }

    public static String toJsonString(Object object) {
		if (StringUtils.isNull(object)) {
			return null;
		}
        try {
            return objectMapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, Class<T> clazz) {
        if (StringUtils.isEmpty(text)) {
            return null;
        }
        try {
            return objectMapper.readValue(text, clazz);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
        if (ArrayUtil.isEmpty(bytes)) {
            return null;
        }
        try {
            return objectMapper.readValue(bytes, clazz);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, TypeReference<T> typeReference) {
		if (StringUtils.isBlank(text)) {
			return null;
		}
        try {
            return objectMapper.readValue(text, typeReference);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

	public static <T> Map<String, T> parseMap(String text) {
		if (StringUtils.isBlank(text)) {
			return null;
		}
		try {
			return objectMapper.readValue(text, new TypeReference<Map<String, T>>() {});
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

    public static <T> List<T> parseArray(String text, Class<T> clazz) {
        if (StringUtils.isEmpty(text)) {
            return new ArrayList<>();
        }
        try {
            return objectMapper.readValue(text, objectMapper.getTypeFactory().constructCollectionType(List.class, clazz));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

}