#region License Information (GPL v3)

/*
    ShareX - A program that allows you to take screenshots and share any file type
    Copyright (c) 2007-2020 ShareX Team

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/

#endregion License Information (GPL v3)

using ShareX.HelpersLib;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace ShareX.HistoryLib
{
    public class HistoryFilter
    {
        public string FileName { get; set; }
        public string URL { get; set; }
        public bool FilterDate { get; set; }
        public DateTime FromDate { get; set; }
        public DateTime ToDate { get; set; }
        public bool FilterType { get; set; }
        public string Type { get; set; }
        public bool FilterHost { get; set; }
        public string Host { get; set; }

        public bool SearchInTags { get; set; } = true;

        public bool IsFiltered
        {
            get
            {
                return !string.IsNullOrEmpty(FileName) || !string.IsNullOrEmpty(URL) || FilterDate ||
                    (FilterType && !string.IsNullOrEmpty(Type)) || (FilterHost && !string.IsNullOrEmpty(Host));
            }
        }

        public HistoryFilter()
        {
        }

        public HistoryFilter(string filename)
        {
            FileName = filename;
        }

        public HistoryItem[] ApplyFilter(HistoryItem[] historyItems)
        {
            if (!IsFiltered)
            {
                return historyItems;
            }

            IEnumerable<HistoryItem> result = historyItems.AsEnumerable();

            if (FilterType && !string.IsNullOrEmpty(Type))
            {
                result = result.Where(x => !string.IsNullOrEmpty(x.Type) && x.Type.Equals(Type, StringComparison.InvariantCultureIgnoreCase));
            }

            if (FilterHost && !string.IsNullOrEmpty(Host))
            {
                result = result.Where(x => !string.IsNullOrEmpty(x.Host) && x.Host.Contains(Host, StringComparison.InvariantCultureIgnoreCase));
            }

            if (!string.IsNullOrEmpty(FileName))
            {
                string pattern = Regex.Escape(FileName).Replace("\\?", ".").Replace("\\*", ".*");
                Regex regex = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
                result = result.Where(x => (x.FileName != null && regex.IsMatch(x.FileName)) ||
                    (SearchInTags && x.Tags != null && x.Tags.Any(tag => regex.IsMatch(tag.Value))));
            }

            if (!string.IsNullOrEmpty(URL))
            {
                result = result.Where(x => x.URL != null && x.URL.Contains(URL, StringComparison.InvariantCultureIgnoreCase));
            }

            if (FilterDate)
            {
                result = result.Where(x => x.DateTime.Date >= FromDate && x.DateTime.Date <= ToDate);
            }

            return result.ToArray();
        }
    }
}