using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Chat.Framework.Utils
{
    /// <summary>
    /// 常用的操作类
    /// </summary>
    public static class Common
    {
        #region Base64 与 Image互转
        /// <summary>
        /// 图片转Base64
        /// </summary>
        /// <param name="file">图片</param>
        /// <returns></returns>
        public static string ConvertImageToBase64(Image file)
        {
            using (MemoryStream memoryStream = new MemoryStream())
            {
                file.Save(memoryStream, file.RawFormat);
                byte[] imageBytes = memoryStream.ToArray();
                return Convert.ToBase64String(imageBytes);
            }
        }

        /// <summary>
        /// Base64转图片
        /// </summary>
        /// <param name="base64String">base64</param>
        /// <returns></returns>
        public static Image ConvertBase64ToImage(string base64String)
        {
            byte[] imageBytes = Convert.FromBase64String(base64String);
            using (MemoryStream ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
            {
                ms.Write(imageBytes, 0, imageBytes.Length);
                return Image.FromStream(ms, true);
            }
        }
        #endregion


        private static Random random = new Random();

        /// <summary>
        /// 变量分隔,随机返回
        /// </summary>
        /// <param name="mess">消息</param>
        /// <param name="separator">分隔标识</param>
        /// <returns></returns>
        public static string RandomMess(this string mess, string separator = "[随机]")
        {
            try
            {
                if (string.IsNullOrWhiteSpace(mess)) return string.Empty;
                var messList = mess.Split(new string[] { separator }, StringSplitOptions.RemoveEmptyEntries).Where(f => !string.IsNullOrWhiteSpace(f)).ToList();
                if (messList != null)
                {
                    if (messList.Count == 0 || messList.Count == 1)
                        return mess;
                    return messList[random.Next(0, messList.Count)];
                }
            }
            catch (Exception)
            { }
            return mess;
        }

        /// <summary>
        /// 朋友圈类型
        /// </summary>
        public enum CircleType
        {
            文字朋友圈 = 0,
            视频朋友圈 = 1,
            链接朋友圈 = 2,
            图文朋友圈 = 3,
        }

    }
}