using System.Collections.Generic;
using UnityEngine;
using Newtonsoft.Json;

namespace Metacity.Publish.Editor
{

    /// <summary>
    /// JSON对象工具类
    /// <para>用于序列化和反序列化JSON字符串</para>
    /// </summary>
    public static class JsonTools
    {
        /// <summary>
        /// 加载JSON文件
        /// </summary>
        /// <param name="path">文件路径（绝对路径）</param>
        /// <returns>文件中的JSON字符串</returns>
        public static string LoadJson(string path)
        {
            if (System.IO.File.Exists(path))
            {
                using (System.IO.StreamReader sr = new System.IO.StreamReader(path))
                {
                    string json = sr.ReadToEnd();
                    sr.Close();
                    return json;
                }
            }
            else
            {
                Debug.LogError("加载本地JSON文件:" + path + "——失败,未找到该文件");
                return null;
            }
        }

        /// <summary>
        /// 清除JSON字符串中的转义字符
        /// </summary>
        /// <param name="json">JSON字符串</param>
        /// <returns></returns>
        public static string Clean(string json)
        {
            return JsonConvert.DeserializeObject(json).ToString();
        }

        /// <summary>
        /// 反序列化一段JSON字符串
        /// </summary>
        /// <typeparam name="T">可以被反序列化的类型</typeparam>
        /// <param name="json">JSON字符串</param>
        /// <returns>反序列化后的对象</returns>
        public static T FromJson<T>(string json)
        {
            return JsonConvert.DeserializeObject<T>(json);
        }

        /// <summary>
        /// 序列化JSON对象
        /// </summary>
        /// <param name="obj">JSON对象</param>
        /// <returns>序列化字符串</returns>
        public static string ToJson(object obj)
        {
            return JsonConvert.SerializeObject(obj);
        }

        /// <summary>
        /// 序列化JSON对象
        /// </summary>
        /// <param name="obj">JSON对象</param>
        /// <param name="formatting">序列化格式</param>
        /// <returns>序列化后的JSON字符串</returns>
        public static string ToJson(object obj, Formatting formatting)
        {
            return JsonConvert.SerializeObject(obj, formatting);
        }

        /// <summary>
        /// 反序列化本地JSON文件到相应的类
        /// </summary>
        /// <typeparam name="T">可以被反序列化的类型</typeparam>
        /// <param name="path">JSON文件的路径</param>
        /// <returns>反序列化后的对象</returns>
        public static T FromFile<T>(string path)
        {
            string json = LoadJson(path);
            if (string.IsNullOrEmpty(json))
            {
                return default(T);
            }

            var t = new JsonSerializerSettings();
            t.NullValueHandling = NullValueHandling.Include;
            return JsonConvert.DeserializeObject<T>(json, t);
        }

        /// <summary>
        /// 将JSON对象保存到JSON文件
        /// </summary>
        /// <param name="obj">JSON对象</param>
        /// <param name="path">文件路径（绝对路径）</param>
        /// <returns>true 保存成功 false 保存失败</returns>
        public static bool ToFile(object obj, string path)
        {
            if (string.IsNullOrEmpty(path)) return false;
            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(path))
            {
                sw.Write(ToJson(obj));
                sw.Close();
                return true;
            }
        }

        /// <summary>
        /// 将JSON对象保存到JSON文件
        /// </summary>
        /// <param name="obj">JSON对象</param>
        /// <param name="path">文件路径（绝对路径）</param>
        /// <param name="append">true 添加内容 false 覆盖</param>
        /// <returns>true 保存成功 false 保存失败</returns>
        public static bool ToFile(object obj, string path, bool append)
        {
            if (string.IsNullOrEmpty(path)) return false;
            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(path, append))
            {
                sw.Write(ToJson(obj));
                sw.Close();
                return true;
            }
        }

        /// <summary>
        /// 获取某路径下JSON中的数组数据
        /// </summary>
        /// <typeparam name="T">类型（可序列化）</typeparam>
        /// <param name="path">路径</param>
        /// <returns></returns>
        public static List<T> GetListDataFromPath<T>(string path)
        {
            if (!System.IO.File.Exists(path))
            {
                Debug.Log("文件不存在 path：" + path);
                return null;
            }

            return FromFile<List<T>>(path);
        }

        /// <summary>
        ///  获取Json字符串中的对象，直接存成list
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="json">Json字符串</param>
        /// <returns></returns>
        public static List<T> GetListDataFromString<T>(string json)
        {
            return JsonConvert.DeserializeObject<List<T>>(json);
        }

        /// <summary>
        /// 转化List对象成字符串
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetStringFromListData<T>(List<T> list)
        {
            return JsonConvert.SerializeObject(list, Newtonsoft.Json.Formatting.Indented);
        }

        /// <summary>
        /// 将一组对象存储为Json字符串
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="path">存储路径</param>
        /// <param name="list"></param>
        public static void WriteListData<T>(string path, List<T> list)
        {
            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(path, false))
            {
                string _json = JsonConvert.SerializeObject(list, Newtonsoft.Json.Formatting.Indented);
                sw.Write(_json);
                sw.Close();
            }
        }

        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="dic">字典</param>
        /// <param name="key">字典里具体键</param>
        /// <returns></returns>
        public static int GetIntValue(Dictionary<string, object> dic, string key)
        {
            object value = GetValue(dic, key);
            if (value == null)
            {
                return 0;
            }

            int intValue;
            if (int.TryParse(value.ToString(), out intValue) == false)
            {
                Debug.Log(int.Parse(value.ToString()));
                Debug.LogError("Value 转换失败 " + intValue);
            }

            return intValue;
        }

        public static string GetStringValue(Dictionary<string, object> from, string property)
        {
            object value = GetValue(from, property);

            if (value == null)
            {
                return "";
            }

            return value.ToString();
        }

        public static object GetValue(Dictionary<string, object> from, string property)
        {
            if (from == null)
            {
                Debug.LogError("Dictionary<string, object> from = " + null);
                return null;
            }

            object value;
            if (from.TryGetValue(property, out value))
            {
                return value;
            }

            Debug.LogError("不存在property = " + property);
            return null;
        }
    }

}