using Microsoft.Xna.Framework;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Barotrauma.Networking
{
    public partial class ServerLog
    {
        public GUIButton LogFrame;
        private GUIListBox listBox;

        private string msgFilter;

        public void CreateLogFrame()
        {
            LogFrame = new GUIButton(new RectTransform(Vector2.One, GUI.Canvas), style: "GUIBackgroundBlocker")
            {
                OnClicked = (btn, userdata) => { if (GUI.MouseOn == btn || GUI.MouseOn == btn.TextBlock) LogFrame = null; return true; }
            };
            new GUIButton(new RectTransform(Vector2.One, LogFrame.RectTransform), "", style: null).OnClicked += (btn, userData) =>
            {
                LogFrame = null;
                return true;
            };

            GUIFrame innerFrame = new GUIFrame(new RectTransform(new Vector2(0.5f, 0.5f), LogFrame.RectTransform, Anchor.Center) { MinSize = new Point(700, 500) });
            GUIFrame paddedFrame = new GUIFrame(new RectTransform(new Vector2(0.95f, 0.9f), innerFrame.RectTransform, Anchor.Center), style: null);

            // left column ----------------

            var tickBoxContainer = new GUILayoutGroup(new RectTransform(new Vector2(0.25f, 1.0f), paddedFrame.RectTransform, Anchor.BottomLeft));
            int y = 30;
            List<GUITickBox> tickBoxes = new List<GUITickBox>();
            foreach (MessageType msgType in Enum.GetValues(typeof(MessageType)))
            {
                var tickBox = new GUITickBox(new RectTransform(new Point(tickBoxContainer.Rect.Width, 30), tickBoxContainer.RectTransform), TextManager.Get("ServerLog." + messageTypeName[msgType]), font: GUI.SmallFont)
                {
                    Selected = true,
                    TextColor = messageColor[msgType],
                    OnSelected = (GUITickBox tb) =>
                    {
                        msgTypeHidden[(int)msgType] = !tb.Selected;
                        FilterMessages();
                        return true;
                    }
                };
                tickBox.TextBlock.SelectedTextColor = tickBox.TextBlock.TextColor;
                tickBox.Selected = !msgTypeHidden[(int)msgType];
                tickBoxes.Add(tickBox);

                y += 20;
            }

            tickBoxes.Last().TextBlock.RectTransform.SizeChanged += () =>
            {
                GUITextBlock.AutoScaleAndNormalize(tickBoxes.Select(t => t.TextBlock), defaultScale: 1.0f);
            };

            // right column ----------------

            var rightColumn = new GUILayoutGroup(new RectTransform(new Vector2(0.75f, 1.0f), paddedFrame.RectTransform, Anchor.CenterRight), childAnchor: Anchor.TopRight)
            {
                Stretch = true,
                RelativeSpacing = 0.02f
            };

            GUILayoutGroup filterArea = new GUILayoutGroup(new RectTransform(new Vector2(1.0f, 0.05f), rightColumn.RectTransform, Anchor.TopRight),
                isHorizontal: true, childAnchor: Anchor.CenterLeft);

            new GUITextBlock(new RectTransform(new Vector2(0.2f, 1.0f), filterArea.RectTransform), TextManager.Get("ServerLog.Filter"), 
                font: GUI.SubHeadingFont);            
            GUITextBox searchBox = new GUITextBox(new RectTransform(new Vector2(0.8f, 1.0f), filterArea.RectTransform), font: GUI.SmallFont, createClearButton: true);
            searchBox.OnTextChanged += (textBox, text) =>
            {
                msgFilter = text;
                FilterMessages();
                return true;
            };
            GUI.KeyboardDispatcher.Subscriber = searchBox;
            filterArea.RectTransform.MinSize = new Point(0, filterArea.RectTransform.Children.Max(c => c.MinSize.Y));

            listBox = new GUIListBox(new RectTransform(new Vector2(1.0f, 0.95f), rightColumn.RectTransform));

            GUIButton closeButton = new GUIButton(new RectTransform(new Vector2(0.25f, 0.05f), rightColumn.RectTransform), TextManager.Get("Close"))
            {
                OnClicked = (button, userData) =>
                {
                    LogFrame = null;
                    return true;
                }
            };

            rightColumn.Recalculate();

            var currLines = lines.ToList();
            foreach (LogMessage line in currLines)
            {
                AddLine(line);
            }
            FilterMessages();

            listBox.UpdateScrollBarSize();

            if (listBox.BarScroll == 0.0f || listBox.BarScroll == 1.0f) { listBox.BarScroll = 1.0f; }
            
            msgFilter = "";
        }

        public void AssignLogFrame(GUIListBox inListBox, GUIComponent tickBoxContainer, GUITextBox searchBox)
        {
            searchBox.OnTextChanged += (textBox, text) =>
            {
                msgFilter = text;
                FilterMessages();
                return true;
            };

            tickBoxContainer.ClearChildren();

            List<GUITickBox> tickBoxes = new List<GUITickBox>();
            foreach (MessageType msgType in Enum.GetValues(typeof(MessageType)))
            {
                var tickBox = new GUITickBox(new RectTransform(new Point(tickBoxContainer.Rect.Width, (int)(25 * GUI.Scale)), tickBoxContainer.RectTransform), TextManager.Get("ServerLog." + messageTypeName[msgType]), font: GUI.SmallFont)
                {
                    Selected = true,
                    TextColor = messageColor[msgType],
                    OnSelected = (GUITickBox tb) =>
                    {
                        msgTypeHidden[(int)msgType] = !tb.Selected;
                        FilterMessages();
                        return true;
                    }
                };
                tickBox.TextBlock.SelectedTextColor = tickBox.TextBlock.TextColor;
                tickBox.Selected = !msgTypeHidden[(int)msgType];
                tickBoxes.Add(tickBox);
            }
            tickBoxes.Last().TextBlock.RectTransform.SizeChanged += () =>
            {
                GUITextBlock.AutoScaleAndNormalize(tickBoxes.Select(t => t.TextBlock), defaultScale: 1.0f);
            };

            inListBox.ClearChildren();
            listBox = inListBox;

            var currLines = lines.ToList();
            foreach (LogMessage line in currLines)
            {
                AddLine(line);
            }
            FilterMessages();

            listBox.UpdateScrollBarSize();
        }

        private void AddLine(LogMessage line)
        {
            float prevSize = listBox.BarSize;

            var textBlock = new GUITextBlock(new RectTransform(new Vector2(1.0f, 0.0f), listBox.Content.RectTransform),
                line.Text, wrap: true, font: GUI.SmallFont)
            {
                TextColor = messageColor[line.Type],
                Visible = !msgTypeHidden[(int)line.Type],
                CanBeFocused = false,
                UserData = line
            };

            if ((prevSize == 1.0f && listBox.BarScroll == 0.0f) || (prevSize < 1.0f && listBox.BarScroll == 1.0f)) listBox.BarScroll = 1.0f;
        }

        private bool FilterMessages()
        {
            string filter = msgFilter == null ? "" : msgFilter.ToLower();

            foreach (GUIComponent child in listBox.Content.Children)
            {
                var textBlock = child as GUITextBlock;
                if (textBlock == null) continue;

                child.Visible = true;

                if (msgTypeHidden[(int)((LogMessage)child.UserData).Type])
                {
                    child.Visible = false;
                    continue;
                }

                textBlock.Visible = string.IsNullOrEmpty(filter) || textBlock.Text.ToLower().Contains(filter);
            }
            listBox.UpdateScrollBarSize();
            listBox.BarScroll = 0.0f;

            return true;
        }

        public bool ClearFilter(GUIComponent button, object obj)
        {
            var searchBox = button.UserData as GUITextBox;
            if (searchBox != null) searchBox.Text = "";

            msgFilter = "";
            FilterMessages();

            return true;
        }

    }
}