using System;
using System.Drawing;
using System.Windows.Forms;

namespace Core.LZMes.Client.UIM.comm
{
    internal class BandTagInfo
    {
        public OutlookBar outlookBar;
        public int index;

        public BandTagInfo(OutlookBar ob, int index)
        {
            outlookBar = ob;
            this.index = index;
        }
    }

    public class OutlookBar : Panel
    {
        private int buttonHeight;
        private int selectedBand;
        private int selectedBandHeight;

        public int ButtonHeight
        {
            get
            {
                return buttonHeight;
            }

            set
            {
                buttonHeight = value;
                // do recalc layout for entire bar
            }
        }

        public int SelectedBand
        {
            get
            {
                return selectedBand;
            }
            set
            {
                SelectBand(value);
            }
        }

        public OutlookBar()
        {
            buttonHeight = 25;
            selectedBand = 0;
            selectedBandHeight = 0;
        }

        public void Initialize()
        {
            // parent must exist!
            Parent.SizeChanged += new EventHandler(SizeChangedEvent);
        }

        public void AddBand(string caption, ContentPanel content, EventHandler onClickEvent)
        {
            content.outlookBar = this;
            int index = Controls.Count;
            BandTagInfo bti = new BandTagInfo(this, index);
            BandPanel bandPanel = new BandPanel(caption, content, bti,onClickEvent);
            bandPanel.Text = caption;
            Controls.Add(bandPanel);
            UpdateBarInfo();
            RecalcLayout(bandPanel, index);
        }

        public void SelectBand(int index)
        {
            selectedBand = index;
            RedrawBands();
        }

        private void RedrawBands()
        {
            for (int i = 0; i < Controls.Count; i++)
            {
                BandPanel bp = Controls[i] as BandPanel;
                RecalcLayout(bp, i);
            }
        }

        private void UpdateBarInfo()
        {
            selectedBandHeight = ClientRectangle.Height - (Controls.Count * buttonHeight);
        }

        private void RecalcLayout(BandPanel bandPanel, int index)
        {
            int vPos = (index <= selectedBand) ? buttonHeight * index : buttonHeight * index + selectedBandHeight;
            int height = selectedBand == index ? selectedBandHeight + buttonHeight : buttonHeight;

            // the band dimensions
            bandPanel.Location = new Point(0, vPos);
            bandPanel.Size = new Size(ClientRectangle.Width, height);

            // the contained button dimensions
            bandPanel.Controls[0].Location = new Point(0, 0);
            bandPanel.Controls[0].Size = new Size(ClientRectangle.Width, buttonHeight);

            // the contained content panel dimensions
            bandPanel.Controls[1].Location = new Point(0, buttonHeight);
            bandPanel.Controls[1].Size = new Size(ClientRectangle.Width - 2, height - 8);
        }

        private void SizeChangedEvent(object sender, EventArgs e)
        {
            Size = new Size(Size.Width, ((Control)sender).ClientRectangle.Size.Height);
            UpdateBarInfo();
            RedrawBands();
        }
    }

    internal class BandPanel : Panel
    {
        private string text;

        public string TextBox
        {
            get
            {
                return text;
            }
        }

        public BandPanel(string caption, ContentPanel content, BandTagInfo bti, EventHandler onClickEvent)
        {
            BandButton bandButton = new BandButton(caption, bti);
            bandButton.Click += onClickEvent;
            text = caption;
            Controls.Add(bandButton);
            Controls.Add(content);
        }
    }

    internal class BandButton : Button
    {
        private BandTagInfo bti;

        public BandButton(string caption, BandTagInfo bti)
        {
            Text = caption;
            FlatStyle = FlatStyle.Standard;
            Visible = true;
            this.bti = bti;
            Click += new EventHandler(SelectBand);
        }

        private void SelectBand(object sender, EventArgs e)
        {
            bti.outlookBar.SelectBand(bti.index);
        }
    }

    public abstract class ContentPanel : Panel
    {
        public OutlookBar outlookBar;

        public ContentPanel()
        {
            // initial state
            Visible = true;
        }
    }

    public class IconPanel : ContentPanel
    {
        protected int iconSpacing;
        protected int margin;

        public int IconSpacing
        {
            get
            {
                return iconSpacing;
            }
        }

        public int Margin
        {
            get
            {
                return margin;
            }
        }

        public IconPanel()
        {
            margin = 10;
            iconSpacing = 32 + 15 + 10;	// icon height + text height + margin
            BackColor = Color.LightBlue;
            AutoScroll = true;
        }

        public void AddIcon(string caption, Image image, EventHandler onClickEvent)
        {
            int index = Controls.Count / 2;	// two entries per icon
            PanelIcon panelIcon = new PanelIcon(this, image, index, onClickEvent);
            panelIcon.Text = caption;
            Controls.Add(panelIcon);

            Label label = new Label();
            label.Text = caption;
            label.Visible = true;
            label.Location = new Point(0, margin + image.Size.Height + index * iconSpacing);
            label.Size = new Size(Size.Width, 15);
            label.TextAlign = ContentAlignment.TopCenter;
            label.Click += onClickEvent;
            label.Tag = panelIcon;
            Controls.Add(label);
        }
    }

    public class PanelIcon : PictureBox
    {
        public int index;
        public IconPanel iconPanel;

        private Color bckgColor;
        private bool mouseEnter;
        private string text;

        public int Index
        {
            get
            {
                return index;
            }
        }

        public string Text
        {
            get
            {
                return text;
            }
            set
            {
                text = value;
            }
        }

        public PanelIcon(IconPanel parent, Image image, int index, EventHandler onClickEvent)
        {
            this.index = index;
            this.iconPanel = parent;
            Image = image;
            Visible = true;
            Location = new Point(iconPanel.outlookBar.Size.Width / 2 - image.Size.Width / 2,
                            iconPanel.Margin + index * iconPanel.IconSpacing);
            Size = image.Size;
            Click += onClickEvent;
            Tag = this;

            MouseEnter += new EventHandler(OnMouseEnter);
            MouseLeave += new EventHandler(OnMouseLeave);
            MouseMove += new MouseEventHandler(OnMouseMove);

            bckgColor = iconPanel.BackColor;
            mouseEnter = false;
        }

        private void OnMouseMove(object sender, MouseEventArgs args)
        {
            if ((args.X < Size.Width - 2) &&
                (args.Y < Size.Width - 2) &&
                (!mouseEnter))
            {
                BackColor = Color.LightCyan;
                BorderStyle = BorderStyle.FixedSingle;
                Location = Location - new Size(1, 1);
                mouseEnter = true;
            }
        }

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

        private void OnMouseLeave(object sender, EventArgs e)
        {
            if (mouseEnter)
            {
                BackColor = bckgColor;
                BorderStyle = BorderStyle.None;
                Location = Location + new Size(1, 1);
                mouseEnter = false;
            }
        }
    }
}