using System.Text;

namespace YLErp
{
    static class InnerHelper
    {
        public static readonly OptUserInfo UserInfo;

        static InnerHelper()
        {
            UserInfo = OptUserInfo.SystemUser;
        }

        public static FileStream CreateTempFile(string fileName, out string fullFilePath)
        {
            var tempFolder = Path.Combine(AppContext.BaseDirectory, "temp");

            Directory.CreateDirectory(tempFolder);

            fullFilePath = Path.Combine(tempFolder, fileName);

            return new FileStream(fullFilePath, FileMode.Create, FileAccess.ReadWrite);
        }

        public static T ReadSetting<T>(string fileName)
        {
            var filePath = GetFilePath(fileName);
            if (File.Exists(filePath))
            {
                var json = File.ReadAllText(filePath);
                return JsonHelper.Deserialize<T>(json);
            }
            return default;
        }

        public static void SaveSetting<T>(string fileName, T data)
        {
            var filePath = GetFilePath(fileName);
            using (var fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
            using (var sw = new StreamWriter(fs, Encoding.UTF8))
            {
                var json = JsonHelper.Serialize(data);
                sw.WriteLine(json);
            }
        }

        public static string ReadSetting(string fileName)
        {
            var filePath = GetFilePath(fileName);
            if (File.Exists(filePath))
            {
                return File.ReadAllText(filePath);
            }
            return string.Empty;
        }

        public static void SaveSetting(string fileName, string content)
        {
            var filePath = GetFilePath(fileName);
            using (var fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
            using (var sw = new StreamWriter(fs, Encoding.UTF8))
            {
                sw.WriteLine(content);
            }
        }

        private static string GetFilePath(string fileName)
        {
            var dataFolder = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
            var baseFolder = Path.Combine(dataFolder, "YLTestTool");
            Directory.CreateDirectory(baseFolder);
            return Path.Combine(baseFolder, fileName);
        }
    }
}