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package com.yixan.tools.common.util;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.util.TypeUtils;

/**
 * KeyString类
 *
 * @author 赵卉华
 * @version C01 2014年5月21日
 */
public class KeyString extends KeyValue {

    /**
     * 构造函数
     */
    public KeyString() {
        super();
    }

    /**
     * 构造函数
     *
     * @param key KEY
     * @param value VALUE
     */
    public KeyString(String key, String value) {
        super(key, value);
    }

    /**
     * 将字符串转换为KeyString对象

     * valueOf("{'key':1,'value':'冷水'}")

     * 或: valueOf("{'1':'冷水'}")

     *
     * @param text 字符串
     * @return KeyString对象
     */
    public static KeyString valueOf(String text) {
        if (VerifyUtil.isBlank(text)) {
            return null;
        }
        JSONObject json = JSON.parseObject(text);
        return valueOf(json);
    }

    /**
     * 将字符串转换为KeyString对象数组

     * listOf("[{'key':1,'value':'冷水'},{'key':2,'value':'热水'}]")

     * 或: listOf("{'1':'冷水','2':'热水','3':'直饮水'}")

     * --> List<KeyString>
     *
     * @param text 字符串
     * @return List<KeyString> 对象数组
     */
    public static List listOf(String text) {
        if (VerifyUtil.isBlank(text)) {
            return null;
        }
        List list = new ArrayList<>();

        Object object = JSON.parse(text);
        if (object instanceof JSONArray) {
            JSONArray array = (JSONArray) object;
            for (Object i : array) {
                list.add(valueOf((JSONObject) i));
            }
        } else if (object instanceof JSONObject) {
            JSONObject json = (JSONObject) object;
            for (Map.Entry entry : json.entrySet()) {
                String key = entry.getKey();
                Object value = entry.getValue();
                String string = TypeUtils.castToJavaBean(value, String.class);
                list.add(new KeyString(key, string));
            }
        }

        Collections.sort(list);
        return list;

    }

    private static KeyString valueOf(JSONObject json) {
        if (json.containsKey("key")) {
            return JSON.toJavaObject(json, KeyString.class);
        } else {
            for (Map.Entry entry : json.entrySet()) {
                String key = entry.getKey();
                Object value = entry.getValue();
                String string = TypeUtils.castToJavaBean(value, String.class);
                return new KeyString(key, string);
            }
            throw new IllegalArgumentException("json is empty.");
        }
    }

}