using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace AibisDream.Utility
{
    public static class JsonUtil
    {
        public const string JsonSuffix = ".json";

        /// <summary>
        /// 按路径和Key加载
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="key">key</param>
        /// <typeparam name="T">类型</typeparam>
        /// <returns>Bean</returns>
        /// <exception cref="Exception">错误</exception>
        public static T ReadBean<T>(string path, string key)
        {
            string json = File.ReadAllText(path);
            JObject jObject = JObject.Parse(json);

            if (jObject.ContainsKey(key))
            {
                return jObject.ToObject<T>();
            }

            throw new Exception("没有找到对应的Key");
        }

        /// <summary>
        /// 按路径加载Json
        /// </summary>
        /// <param name="path"></param>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static T ReadBean<T>(string path)
        {
            string json = File.ReadAllText(path);
            return JsonConvert.DeserializeObject<T>(json);
        }

        public static T ReadBeanByText<T>(string text)
        {
            if (!text.StartsWith("{"))
            {
                text = "{" + text + "}";
            }
            return JsonConvert.DeserializeObject<T>(text);
        }

        /// <summary>
        /// 按路径加载Json
        /// </summary>
        /// <param name="path">路径</param>
        /// <typeparam name="T">Bean</typeparam>
        /// <returns>目标Bean</returns>
        public static T[] ReadBeanArray<T>(string path)
        {
            string json = File.ReadAllText(path);
            return JsonConvert.DeserializeObject<T[]>(json);
        }

        /// <summary>
        /// 按路径加载Json
        /// </summary>
        /// <param name="path">路径</param>
        /// <typeparam name="T">Bean</typeparam>
        /// <returns>目标Bean</returns>
        public static Dictionary<string, T> ReadBeanDict<T>(string path)
        {
            string json = File.ReadAllText(path);
            return JsonConvert.DeserializeObject<Dictionary<string, T>>(json);
        }

        /// <summary>
        /// 获取Json中的Key列表
        /// </summary>
        /// <param name="path">路径</param>
        /// <returns>key列表</returns>
        public static string[] ReadKeys(string path)
        {
            string json = File.ReadAllText(path);
            JObject jObject = JObject.Parse(json);

            return jObject.Properties().Select(jProp => jProp.Name).ToArray();
        }

        public static JObject ReadJObject(string path)
        {
            string json = File.ReadAllText(FormatAsJsonPath(path));
            return JObject.Parse(json);
        }

        /// <summary>
        /// 保存Bean
        /// </summary>
        /// <param name="bean">bean</param>
        /// <param name="path">路径</param>
        /// <typeparam name="T">类型</typeparam>
        public static void SaveBean<T>(T bean, string path)
        {
            string json = JsonConvert.SerializeObject(bean);
            File.WriteAllText(path, json);
        }

        public static void SaveJObject(JObject jObject, string path)
        {
            string json = jObject.ToString();
            File.WriteAllText(FormatAsJsonPath(path), json);
        }

        /// <summary>
        /// 保存类
        /// </summary>
        /// <param name="bean">对象</param>
        /// <param name="key">key</param>
        /// <param name="path">保存配置</param>
        /// <param name="saveMode">添加还是覆盖</param>
        /// <typeparam name="T">类型</typeparam>
        public static void SaveBean<T>(T bean, string key, string path, SaveMode saveMode = SaveMode.Add)
        {
            if (saveMode == SaveMode.Add && File.Exists(path))
            {
                Dictionary<string, T> originDic = JsonConvert.DeserializeObject<Dictionary<string, T>>(path);
                originDic.Add(key, bean);
                string tempJson = JsonConvert.SerializeObject(originDic);
                File.WriteAllText(path, tempJson);
            }
            else
            {
                Dictionary<string, T> tempDic = new Dictionary<string, T> { { key, bean } };
                string tempJson = JsonConvert.SerializeObject(tempDic);
                File.WriteAllText(path, tempJson);
            }
        }

        /// <summary>
        /// 自动把文件名转为Json
        /// </summary>
        /// <param name="fileName">文件名</param>
        /// <returns>已改为json的文件名</returns>
        public static string FormatAsJsonPath(string fileName)
        {
            if (!fileName.EndsWith(JsonSuffix))
            {
                return fileName + JsonSuffix;
            }

            return fileName;
        }
    }

    public enum SaveMode
    {
        Replace,
        Add
    }
}