using YLErp.Models;

namespace YLErp
{
    /// <summary>
    /// OTC-WEB上下文
    /// </summary>
    public static class OtcAppContext
    {
        static object InitStateObject;

        /// <summary>
        /// 初始化OTC系统上下文
        /// </summary>
        public static void Initialize(Func<string, string> mapPath)
        {
            if (InitStateObject != null)
            {
                throw new Exception("已初始化");
            }

            InitStateObject = new object();
            MapPath = mapPath ?? throw new ArgumentNullException(nameof(mapPath));
            RootPath = mapPath("~/");
            AppDocsPath = mapPath("~/App_Docs");
            AppDataPath = mapPath("~/App_Data");
        }

        /// <summary>
        /// 映射虚拟路径到物理路径
        /// </summary>
        public static Func<string, string> MapPath { get; private set; }

        /// <summary>
        /// WEB根目录(物理路径)
        /// </summary>
        public static string RootPath { get; private set; }

        /// <summary>
        /// App_Docs物理路径
        /// </summary>
        public static string AppDocsPath { get; private set; }

        /// <summary>
        /// App_Data物理路径
        /// </summary>
        public static string AppDataPath { get; private set; }

        /// <summary>
        /// 合成文件夹路径并确保文件夹存在
        /// </summary>
        public static string EnsureDirectory(string rootPath, string relativePath)
        {
            var path = Path.Combine(rootPath, relativePath);
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            return path;
        }

        /// <summary>
        /// 获取导出文件模板的物理路径(仅支持'App_Docs/导出模板'下的模板文件)
        /// </summary>
        public static string GetExportTemplateFilePath(string fileName)
        {
            return MapPath("/App_Docs/导出模板/" + fileName);
        }

        /// <summary>
        /// 获取导出文件输出路径
        /// </summary>
        public static WebFileGenResult GetExportFileOutputPath(string fileName, bool isTemp = false)
        {
            var folder = isTemp ? "Temp" : "Download";
            var result = new WebFileGenResult
            {
                WebPath = $"/App_Docs/{folder}/{DateTime.Today:yyyyMM}/{fileName}"
            };
            result.PhysicalPath = MapPath(result.WebPath);
            return result;
        }
    }
}