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package com.lframework.starter.web.utils;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.JsonNodeType;
import com.lframework.common.exceptions.impl.DefaultSysException;
import com.lframework.common.utils.StringUtil;
import java.util.List;
import lombok.extern.slf4j.Slf4j;

@Slf4j
public class JsonUtil {

  private static final ObjectMapper OBJECT_MAPPER = ApplicationUtil.getBean(ObjectMapper.class);

  public static String toJsonString(Object obj) {

    if (obj == null) {
      return null;
    }
    try {
      return OBJECT_MAPPER.writer().writeValueAsString(obj);
    } catch (JsonProcessingException e) {
      log.error(e.getMessage(), e);
      throw new DefaultSysException(e.getMessage());
    }
  }

  public static  T parseObject(String jsonStr, Class clazz) {

    if (StringUtil.isEmpty(jsonStr) || clazz == null) {
      return null;
    }

    try {
      return OBJECT_MAPPER.readValue(jsonStr, clazz);
    } catch (JsonProcessingException e) {
      log.error(e.getMessage(), e);
      throw new DefaultSysException(e.getMessage());
    }
  }

  public static  List parseList(String jsonStr, Class clazz) {

    if (StringUtil.isEmpty(jsonStr) || clazz == null) {
      return null;
    }

    try {
      return OBJECT_MAPPER.readValue(jsonStr,
          OBJECT_MAPPER.getTypeFactory().constructCollectionType(List.class, String.class));
    } catch (JsonProcessingException e) {
      log.error(e.getMessage(), e);
      throw new DefaultSysException(e.getMessage());
    }
  }

  public static  T convert(Object obj, Class clazz) {

    if (obj == null || clazz == null) {
      return null;
    }

    return OBJECT_MAPPER.convertValue(obj, clazz);
  }

  public static boolean isJsonObject(String jsonStr) {

    if (StringUtil.isBlank(jsonStr)) {
      return false;
    }

    try {
      JsonNode jsonNode = OBJECT_MAPPER.readTree(jsonStr);
      return jsonNode.getNodeType() != JsonNodeType.ARRAY;
    } catch (JsonProcessingException e) {
      return false;
    }
  }

  public static boolean isJsonArray(String jsonStr) {

    if (StringUtil.isBlank(jsonStr)) {
      return false;
    }

    try {
      JsonNode jsonNode = OBJECT_MAPPER.readTree(jsonStr);
      return jsonNode.getNodeType() == JsonNodeType.ARRAY;
    } catch (JsonProcessingException e) {
      return false;
    }
  }

  public static boolean isJson(String jsonStr) {

    if (StringUtil.isBlank(jsonStr)) {
      return false;
    }

    try {
      OBJECT_MAPPER.readTree(jsonStr);
    } catch (JsonProcessingException e) {
      return false;
    }

    return true;
  }
}