using PortProxyGUI._extern.NStandard;
using System;
using System.Data;
using System.Linq;
using System.Windows.Forms;
using static System.Windows.Forms.ListViewItem;

namespace PortProxyGUI
{
    public partial class PortProxyGUI : Form
    {
        public SetProxyForm SetProxyForm;
        public About AboutForm;
        private ListViewColumnSorter lvwColumnSorter;

        public PortProxyGUI()
        {
            InitializeComponent();
            lvwColumnSorter = new ListViewColumnSorter();
            listViewProxies.ListViewItemSorter = lvwColumnSorter;
        }

        private void PortProxyGUI_Load(object sender, EventArgs e)
        {
        }

        private void PortProxyGUI_Shown(object sender, EventArgs e)
        {
            RefreshProxyList();
        }

        private void EnableSelectedProxies()
        {
            var items = listViewProxies.SelectedItems.OfType<ListViewItem>();
            foreach (var item in items)
            {
                item.ImageIndex = 1;
                var subItems = item.SubItems.OfType<ListViewSubItem>().ToArray();
                CmdUtil.AddProxy("add", subItems[1].Text, subItems[2].Text, int.Parse(subItems[3].Text), subItems[4].Text, int.Parse(subItems[5].Text));
            }
        }

        private void DisableSelectedProxies()
        {
            var items = listViewProxies.SelectedItems.OfType<ListViewItem>();
            foreach (var item in items)
            {
                item.ImageIndex = 0;
                var subItems = item.SubItems.OfType<ListViewSubItem>().ToArray();
                CmdUtil.DeleteProxy(subItems[1].Text, subItems[2].Text, int.Parse(subItems[3].Text));
            }
        }

        private void DeleteSelectedProxies()
        {
            var items = listViewProxies.SelectedItems.OfType<ListViewItem>();
            DisableSelectedProxies();
            Program.SqliteDbScope.RemoveRange(items.Select(x => new Data.Rule { Id = x.Tag.ToString() }));
            foreach (var item in items) listViewProxies.Items.Remove(item);
        }

        private void SetProxyForUpdate(SetProxyForm form)
        {
            var item = listViewProxies.SelectedItems.OfType<ListViewItem>().FirstOrDefault();
            var subItems = item.SubItems.OfType<ListViewSubItem>().ToArray();
            form.UseUpdateMode(item, subItems[1].Text, subItems[2].Text, subItems[3].Text, subItems[4].Text, subItems[5].Text);
        }

        public void RefreshProxyList()
        {
            var proxies = CmdUtil.GetProxies();
            var rules = Program.SqliteDbScope.Rules;
            foreach (var proxy in proxies)
            {
                var matchedRule = rules.FirstOrDefault(r => r.EqualsWithKeys(proxy));
                proxy.Id = matchedRule?.Id;
            }

            var pendingAdds = proxies.Where(x => x.Id == null);
            var pendingUpdates = proxies.Where(x => x.Id != null && !x.Equals(rules.First(r => r.Id == x.Id)));

            Program.SqliteDbScope.AddRange(pendingAdds);
            Program.SqliteDbScope.UpdateRange(pendingUpdates);

            listViewProxies.Items.Clear();
            rules = Program.SqliteDbScope.Rules;
            foreach (var rule in rules)
            {
                var imageIndex = proxies.Any(p => p.EqualsWithKeys(rule)) ? 1 : 0;
                var item = new ListViewItem { ImageIndex = imageIndex, Tag = rule.Id }.Then(vitem =>
                {
                    vitem.SubItems.AddRange(new[] { rule.Type, rule.ListenOn, rule.ListenPort.ToString(), rule.ConnectTo, rule.ConnectPort.ToString() });
                });
                listViewProxies.Items.Add(item);
            }
        }

        private void contextMenuStrip1_MouseClick(object sender, MouseEventArgs e)
        {
            if (sender is ContextMenuStrip _sender)
            {
                var selected = _sender.Items.OfType<ToolStripMenuItem>().Where(x => x.Selected).FirstOrDefault();
                if (selected is null || !selected.Enabled) return;

                switch (selected)
                {
                    case ToolStripMenuItem item when item == toolStripMenuItem_Enable: EnableSelectedProxies(); break;
                    case ToolStripMenuItem item when item == toolStripMenuItem_Disable: DisableSelectedProxies(); break;

                    case ToolStripMenuItem item when item == toolStripMenuItem_New:
                        if (SetProxyForm == null) SetProxyForm = new SetProxyForm(this);
                        SetProxyForm.UseNormalMode();
                        SetProxyForm.Show();
                        break;

                    case ToolStripMenuItem item when item == toolStripMenuItem_Modify:
                        if (SetProxyForm == null) SetProxyForm = new SetProxyForm(this);
                        SetProxyForUpdate(SetProxyForm);
                        SetProxyForm.Show();
                        break;

                    case ToolStripMenuItem item when item == toolStripMenuItem_Refresh:
                        RefreshProxyList();
                        break;

                    case ToolStripMenuItem item when item == toolStripMenuItem_Delete: DeleteSelectedProxies(); break;

                    case ToolStripMenuItem item when item == toolStripMenuItem_About:
                        if (AboutForm == null)
                        {
                            AboutForm = new About(this);
                            AboutForm.Show();
                        }
                        else AboutForm.Show();
                        break;
                }
            }
        }

        private void listView1_MouseUp(object sender, MouseEventArgs e)
        {
            if (sender is ListView _sender)
            {
                toolStripMenuItem_Enable.Enabled = e.Button == MouseButtons.Right && _sender.SelectedItems.OfType<ListViewItem>().Any(x => x.ImageIndex == 0);
                toolStripMenuItem_Disable.Enabled = e.Button == MouseButtons.Right && _sender.SelectedItems.OfType<ListViewItem>().Any(x => x.ImageIndex == 1);

                toolStripMenuItem_Delete.Enabled = e.Button == MouseButtons.Right && _sender.SelectedItems.OfType<ListViewItem>().Any();
                toolStripMenuItem_Modify.Enabled = e.Button == MouseButtons.Right && _sender.SelectedItems.OfType<ListViewItem>().Count() == 1;
            }
        }

        private void listView1_DoubleClick(object sender, EventArgs e)
        {
            if (sender is ListView _sender)
            {
                var selectAny = _sender.SelectedItems.OfType<ListViewItem>().Any();
                if (selectAny)
                {
                    if (SetProxyForm == null) SetProxyForm = new SetProxyForm(this);
                    SetProxyForUpdate(SetProxyForm);
                    SetProxyForm.Show();
                }
            }
        }

        private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            // Determine if clicked column is already the column that is being sorted.
            if (e.Column == lvwColumnSorter.SortColumn)
            {
                // Reverse the current sort direction for this column.
                if (lvwColumnSorter.Order == SortOrder.Ascending)
                {
                    lvwColumnSorter.Order = SortOrder.Descending;
                }
                else
                {
                    lvwColumnSorter.Order = SortOrder.Ascending;
                }
            }
            else
            {
                // Set the column number that is to be sorted; default to ascending.
                lvwColumnSorter.SortColumn = e.Column;
                lvwColumnSorter.Order = SortOrder.Ascending;
            }

            // Perform the sort with these new sort options.
            listViewProxies.Sort();
        }

    }
}