using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace QMAPP.WinForm.Common
{
    /// <summary>
    /// 工控机本地设置
    /// </summary>
    public class LocalSetting
    {
        private const string filename = "LocalSetting.cfg";
        private static Dictionary<string,string> _settinglist;

        private static LocalSetting _settings = null;
        /// <summary>
        /// 本地配置
        /// </summary>
        public static LocalSetting Settings
        {
            get {
                if (_settings == null)
                {
                    _settings = new LocalSetting();
                }
                return _settings;
            }
        }

        private LocalSetting()
        {
            Load();
        }

        /// <summary>
        /// 加载配置
        /// </summary>
        private static void Load()
        {
            string filepath = ConfigurationManager.AppSettings["SaveFilePath"];
            filepath = string.Format("{0}\\{1}", filepath.TrimEnd('\\'), filename);

            if (System.IO.File.Exists(filepath))
            {
                string settingstring = System.IO.File.ReadAllText(filepath);
                _settinglist = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(settingstring);
                
            }
            if (_settinglist == null)
            {
                _settinglist = new Dictionary<string, string>();
            }
        }
        /// <summary>
        /// 保存配置
        /// </summary>
        private static void Save()
        {
            if (_settinglist != null)
            {
                string filepath = ConfigurationManager.AppSettings["SaveFilePath"];
                filepath = string.Format("{0}\\{1}", filepath.TrimEnd('\\'), filename);
                string settingstring = Newtonsoft.Json.JsonConvert.SerializeObject(_settinglist);
                System.IO.File.WriteAllText(filepath, settingstring);
            }
        }
        /// <summary>
        /// 获取或设置本地配置值
        /// </summary>
        /// <param name="key">key</param>
        /// <returns></returns>
        public string this[string key]
        {
            get
            {
                if (_settinglist != null && _settinglist.ContainsKey(key))
                {
                    return _settinglist[key];
                }
                return null;
            }
            set 
            {
                if (_settinglist != null)
                {
                    if (!_settinglist.ContainsKey(key))
                    {
                        _settinglist.Add(key, value);
                    }
                    else
                    {
                    _settinglist[key] = value;}
                    Save();
                }
            }
        }
        /// <summary>
        /// 获取或设置本地配置值,如果不存在配置则返回默认值并保存
        /// </summary>
        /// <param name="key">key</param>
        /// <param name="defvalue">默认值</param>
        /// <returns></returns>
        public string this[string key,string defvalue]
        {
            get
            {
                if (_settinglist != null)
                {
                    if (!_settinglist.ContainsKey(key))
                    {
                        _settinglist.Add(key, defvalue);
                        Save();
                    }
                    return _settinglist[key];
                }
                return null;
            }
            set
            {
                if (_settinglist != null)
                {
                    if (!_settinglist.ContainsKey(key))
                    {
                        _settinglist.Add(key, value);
                    }
                    else
                    {
                        _settinglist[key] = value;
                    }
                    Save();
                }
            }
        }
    }
}