using PaintDotNet.Base.SettingModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PaintDotNet.Base.CommTool
{
    /// <summary>
    /// 命名规则辅助工具类
    /// </summary>
    public static class NamingRuleHelper
    {
        private static ConfigModel configModel;

        private static string ruleName;

        private static string ruleGain;

        /// <summary>
        /// 按命名规则生成名字
        /// </summary>
        /// <param name="configModel"></param>
        /// <returns></returns>
        public static string GetNameFromXml(ConfigModel model, string ruleName,string ruleGain)
        {
            string nameStr = "";
            if (model != null)
            {
                configModel = model;
                if (!string.IsNullOrEmpty(configModel.NameFormat) && configModel.NameFormat.IndexOf('%') != -1)
                    nameStr = SplitStringToRuleList();
                else
                    nameStr = "pic" + GetContinueNum();
            }
            else
                nameStr = "pic" + GetContinueNum();

            NamingRuleHelper.ruleName = ruleName;
            NamingRuleHelper.ruleGain = ruleGain;
            return nameStr;
        }

        /// <summary>
        /// 将字符串拆分为规则格式的list
        /// </summary>
        /// <returns></returns>
        private static string SplitStringToRuleList()
        {
            List<int> indexList = new List<int>();
            int index = 0;
            foreach (char c in configModel.NameFormat)
            {
                if (c.Equals('%'))
                    indexList.Add(index);

                index++;
            }
            if (indexList.Count > 0)
            {
                List<string> ruleList = new List<string>();
                for (int i = 0; i < indexList.Count; i++)
                {
                    if (i == indexList.Count - 1)
                        ruleList.Add(configModel.NameFormat.Substring(indexList[i]));
                    else
                        ruleList.Add(configModel.NameFormat.Substring(indexList[i], indexList[i + 1] - indexList[i]));
                }
                return JointToName(ruleList);
            }
            else
                return "pic" + GetContinueNum();
        }

        /// <summary>
        /// 拼接出符合规则的
        /// </summary>
        /// <returns></returns>
        private static string JointToName(List<string> ruleList)
        {
            if(ruleList.Count > 0)
            {
                //ConfigModel config = 
                string nameStr = "";
                foreach(string str in ruleList)
                {
                    switch (str)
                    {
                        case "%P":
                            if (!string.IsNullOrEmpty(configModel.NamePrefix))
                                nameStr += configModel.NamePrefix;
                            break;
                        case "%I":
                            nameStr += GetContinueNum();
                            break;
                        case "%h":
                            nameStr += DateTime.Now.ToString("HH");
                            break;
                        case "%m":
                            nameStr += DateTime.Now.ToString("mm");
                            break;
                        case "%s":
                            nameStr += DateTime.Now.ToString("ss");
                            break;
                        case "%Y":
                            nameStr += DateTime.Now.ToString("yyyy");
                            break;
                        case "%M":
                            nameStr += DateTime.Now.ToString("MM");
                            break;
                        case "%D":
                            nameStr += DateTime.Now.ToString("dd");
                            break;
                        case "%G":
                            nameStr += Guid.NewGuid().ToString();
                            break;
                        case "%U":
                            nameStr += Environment.UserName;
                            break;
                        case "%N":
                            nameStr += ruleName;
                            break;
                        case "%E":
                            nameStr += ruleGain;
                            break;
                        case "%T1":
                            nameStr += configModel.Txt1;
                            break;
                        case "%T2":
                            nameStr += configModel.Txt2;
                            break;
                        case "%T3":
                            nameStr += configModel.Txt3;
                            break;
                        case "%Z1":
                            nameStr += configModel.CharZ1;
                            break;
                        case "%Z2":
                            nameStr += configModel.CharZ2;
                            break;
                    }
                }
                return nameStr;
            }
            else
                return "pic" + GetContinueNum();
        }

        /// <summary>
        /// 获取并格式化延续数值
        /// </summary>
        /// <returns></returns>
        private static string GetContinueNum()
        {
            string continueNum = configModel.ContinueNum.ToString();
            if (configModel.NumberNum > continueNum.Length)
                return continueNum.PadLeft(configModel.NumberNum, '0');
            else
                return continueNum;
        }
    }
}