#region License Information (GPL v3)

/*
    ShareX - A program that allows you to take screenshots and share any file type
    Copyright (c) 2007-2024 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 Manina.Windows.Forms;
using ShareX.HelpersLib;
using ShareX.HistoryLib.Properties;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ShareX.HistoryLib
{
    public partial class ImageHistoryForm : Form
    {
        public string HistoryPath { get; private set; }
        public ImageHistorySettings Settings { get; private set; }
        public string SearchText { get; set; }
        public bool SearchInTags { get; set; } = true;

        private HistoryItemManager him;
        private string defaultTitle;
        private List<HistoryItem> allHistoryItems;

        public ImageHistoryForm(string historyPath, ImageHistorySettings settings, Action<string> uploadFile = null, Action<string> editImage = null, Action<string> pinToScreen = null)
        {
            InitializeComponent();
            tsMain.Renderer = new ToolStripRoundedEdgeRenderer();

            HistoryPath = historyPath;
            Settings = settings;

            ilvImages.SetRenderer(new HistoryImageListViewRenderer());
            ilvImages.ThumbnailSize = Settings.ThumbnailSize;

            if (ShareXResources.UseCustomTheme)
            {
                ilvImages.BorderStyle = BorderStyle.None;
            }

            him = new HistoryItemManager(uploadFile, editImage, pinToScreen);
            him.GetHistoryItems += him_GetHistoryItems;
            ilvImages.ContextMenuStrip = him.cmsHistory;

            defaultTitle = Text;

            tstbSearch.TextBox.HandleCreated += (sender, e) => tstbSearch.TextBox.SetWatermark(Resources.HistoryForm_Search_Watermark, true);

            if (Settings.RememberSearchText)
            {
                tstbSearch.Text = Settings.SearchText;
            }

            ShareXResources.ApplyTheme(this, true);

            if (Settings.RememberWindowState)
            {
                Settings.WindowState.ApplyFormState(this);
            }
        }

        private void UpdateTitle(int total, int filtered)
        {
            Text = $"{defaultTitle} ({Resources.Total}: {total:N0} - {Resources.Filtered}: {filtered:N0})";
        }

        private async Task RefreshHistoryItems(bool mockData = false)
        {
            allHistoryItems = await GetHistoryItems(mockData);

            tstbSearch.AutoCompleteCustomSource.Clear();

            if (allHistoryItems.Count > 0)
            {
                tstbSearch.AutoCompleteCustomSource.AddRange(allHistoryItems.Select(x => x.TagsProcessName).Where(x => !string.IsNullOrWhiteSpace(x)).Distinct().ToArray());
            }

            ApplyFilter();
        }

        private void UpdateSearchText()
        {
            SearchText = tstbSearch.Text;

            if (Settings.RememberSearchText)
            {
                Settings.SearchText = SearchText;
            }
            else
            {
                Settings.SearchText = "";
            }
        }

        private async Task<List<HistoryItem>> GetHistoryItems(bool mockData = false)
        {
            HistoryManager history;

            if (mockData)
            {
                history = new HistoryManagerMock(HistoryPath);
            }
            else
            {
                history = new HistoryManagerJSON(HistoryPath);
            }

            List<HistoryItem> historyItems = await history.GetHistoryItemsAsync();
            historyItems.Reverse();
            return historyItems;
        }

        private void ApplyFilter()
        {
            UpdateSearchText();

            ilvImages.Items.Clear();

            List<HistoryItem> filteredHistoryItems = new List<HistoryItem>();

            Regex regex = null;

            if (!string.IsNullOrEmpty(SearchText))
            {
                string pattern = Regex.Escape(SearchText).Replace("\\?", ".").Replace("\\*", ".*");
                regex = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
            }

            for (int i = 0; i < allHistoryItems.Count; i++)
            {
                HistoryItem hi = allHistoryItems[i];

                if (!string.IsNullOrEmpty(hi.FilePath) && FileHelpers.IsImageFile(hi.FilePath) &&
                    (regex == null || regex.IsMatch(hi.FileName) || (SearchInTags && hi.Tags != null && hi.Tags.Any(tag => regex.IsMatch(tag.Value)))) &&
                    (!Settings.FilterMissingFiles || File.Exists(hi.FilePath)))
                {
                    filteredHistoryItems.Add(hi);

                    if (Settings.MaxItemCount > 0 && filteredHistoryItems.Count >= Settings.MaxItemCount)
                    {
                        break;
                    }
                }
            }

            UpdateTitle(allHistoryItems.Count, filteredHistoryItems.Count);

            ImageListViewItem[] ilvItems = filteredHistoryItems.Select(hi => new ImageListViewItem(hi.FilePath) { Tag = hi }).ToArray();
            ilvImages.Items.AddRange(ilvItems);
        }

        private HistoryItem[] him_GetHistoryItems()
        {
            return ilvImages.SelectedItems.Select(x => x.Tag as HistoryItem).ToArray();
        }

        #region Form events

        private async void ImageHistoryForm_Shown(object sender, EventArgs e)
        {
            tstbSearch.Focus();
            this.ForceActivate();

            await RefreshHistoryItems();
        }

        private void ImageHistoryForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (Settings.RememberWindowState)
            {
                Settings.WindowState.UpdateFormState(this);
            }
        }

        private async void ImageHistoryForm_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyData)
            {
                case Keys.F5:
                    await RefreshHistoryItems();
                    e.SuppressKeyPress = true;
                    break;
                case Keys.Control | Keys.F5 when HelpersOptions.DevMode:
                    await RefreshHistoryItems(true);
                    e.SuppressKeyPress = true;
                    break;
            }
        }

        private void ilvImages_SelectionChanged(object sender, EventArgs e)
        {
            him.UpdateSelectedHistoryItem();
        }

        private void ilvImages_ItemDoubleClick(object sender, ItemClickEventArgs e)
        {
            int currentImageIndex = ilvImages.SelectedItems[0].Index;
            int modifiedImageIndex = 0;
            int halfRange = 100;
            int startIndex = Math.Max(currentImageIndex - halfRange, 0);
            int endIndex = Math.Min(startIndex + (halfRange * 2) + 1, ilvImages.Items.Count);

            List<string> filteredImages = new List<string>();

            for (int i = startIndex; i < endIndex; i++)
            {
                string imageFilePath = ilvImages.Items[i].FileName;

                if (i == currentImageIndex)
                {
                    modifiedImageIndex = filteredImages.Count;
                }

                filteredImages.Add(imageFilePath);
            }

            ImageViewer.ShowImage(filteredImages.ToArray(), modifiedImageIndex);
        }

        private void tstbSearch_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                ApplyFilter();

                e.SuppressKeyPress = true;
            }
        }

        private void tsbSearch_Click(object sender, EventArgs e)
        {
            ApplyFilter();
        }

        private void tsbSettings_Click(object sender, EventArgs e)
        {
            using (ImageHistorySettingsForm form = new ImageHistorySettingsForm(Settings))
            {
                form.ShowDialog();
            }

            ilvImages.ThumbnailSize = Settings.ThumbnailSize;

            ApplyFilter();
        }

        private void ilvImages_KeyDown(object sender, KeyEventArgs e)
        {
            e.SuppressKeyPress = him.HandleKeyInput(e);
        }

        #endregion Form events
    }
}