using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Text.RegularExpressions;

namespace YLPublishTool
{
    /// <summary>
    /// 压缩目录
    /// </summary>
    [Description("压缩目录")]
    class ZipDirAction : IPublishAction
    {
        /// <summary>
        /// 压缩目录
        /// </summary>
        public string SrcDir { get; set; }

        /// <summary>
        /// 目标文件路径
        /// </summary>
        public string TargetFilePath { get; set; }

        public string IncludeFilePattern { get; set; }
        public string ExcludeFilePattern { get; set; }

        public void Execute(IPublishContext context)
        {
            if (string.IsNullOrWhiteSpace(SrcDir))
            {
                throw new Exception("压缩目录不能为空");
            }

            var srcDir = new DirectoryInfo(SrcDir);

            if (!srcDir.Exists)
            {
                throw new DirectoryNotFoundException("压缩文件夹不存在: " + SrcDir);
            }

            if (string.IsNullOrWhiteSpace(TargetFilePath))
            {
                throw new Exception("目标文件不能为空");
            }

            if (File.Exists(TargetFilePath))
            {
                File.Delete(TargetFilePath);
            }

            var fileFilter = CreateFileFilter();
            var fastZip = new FastZip();
            fastZip.CreateZip(TargetFilePath, SrcDir, true, fileFilter);
        }

        private string CreateFileFilter()
        {
            var filters = new List<string>(8);
            if (!string.IsNullOrWhiteSpace(IncludeFilePattern))
            {
                var splits = IncludeFilePattern.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
                foreach (var sp in splits)
                {
                    var s = sp.Trim();
                    if (s.Length < 1)
                    {
                        continue;
                    }
                    var endDollar = !s.EndsWith("*");
                    s = s.Trim('*');
                    s = Regex.Escape(s).Replace("\\*", ".*") + (endDollar ? "$" : "");
                    filters.Add(s);
                }
            }

            if (!string.IsNullOrWhiteSpace(ExcludeFilePattern))
            {
                var splits = ExcludeFilePattern.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
                foreach (var sp in splits)
                {
                    var s = sp.Trim();
                    if (s.Length < 1)
                    {
                        continue;
                    }
                    var endDollar = !s.EndsWith("*");
                    s = s.Trim('*');
                    s = Regex.Escape(s).Replace("\\*", ".*") + (endDollar ? "$" : "");
                    filters.Add("-" + s);
                }
            }

            return filters.Count > 0 ? string.Join(";", filters) : null;
        }

        public void SetProperty(string name, string value)
        {
            switch (name)
            {
                case "压缩目录":
                    SrcDir = value;
                    break;
                case "目标文件":
                    TargetFilePath = value;
                    break;
                case "包含文件":
                    IncludeFilePattern = value;
                    break;
                case "排除文件":
                    ExcludeFilePattern = value;
                    break;
            }
        }
    }
}