using Microsoft.AspNetCore.Html;
using System.Collections;
using YLErp.Events;

namespace YLErp
{
    /// <summary>
    /// HTML帮助类
    /// </summary>
    public static class HtmlUtil
    {
        /// <summary>
        /// JS版本(每次启动后更新，不要用于layout中的js版本设置)
        /// </summary>
        public static readonly string JsVersion;

        //bin目录文件版本
        public static readonly DateTime BinFileVersion;

        static long _dataCacheUpdateTime;

        static HtmlUtil()
        {
            //获取bin目录中YLErp开头的文件最后修改日期作为JS和CSS文件版本
            var binDir = new DirectoryInfo(AppContext.BaseDirectory);
            var files = binDir.GetFiles("YLErp*");
            BinFileVersion = files.Any() ? files.Max(n => n.LastWriteTime) : DateTime.MinValue;
            JsVersion = BinFileVersion.ToString("yyMMddHHmmss");

            EventBus.Subscribe<DataCacheUpdateEvent>(t =>
            {
                _dataCacheUpdateTime = DateTimeOffset.Now.ToUnixTimeSeconds();
            });
        }

        /// <summary>
        /// 获取基础数据JS连接
        /// </summary>
        public static IHtmlContent BasicDataJs(params string[] types)
        {
            return new HtmlString(types == null ? "/front/basicData" :
                $"/front/basicData?types={string.Join("&types=", types)}&t={_dataCacheUpdateTime}");
        }

        /// <summary>
        /// 获取基础数据JS连接(无缓存版本)
        /// </summary>
        public static IHtmlContent BasicDataJsV2(params string[] types)
        {
            return new HtmlString(types == null ? "/front/basicData" :
                $"/front/basicData?types={string.Join("&types=", types)}&t={DateTime.Now.Ticks}");
        }

        /// <summary>
        /// 
        /// </summary>
        public static string DateStr(DateTime dt)
        {
            return dt.Year < 1000 ? string.Empty : dt.ToString("yyyy-MM-dd");
        }
    }
}