using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;  
using ICSharpCode.WinFormsUI.Forms;
using ICSharpCode.WinFormsUI.NGraphics;

namespace ICSharpCode.WinFormsUI.Core
{
    internal delegate bool DelegateWindowState();
    public class ControlBoxManager
    {
        private BaseForm _owner;

        private RenderControlButton closeBtn;
        private RenderControlButton maxBtn;
        private RenderControlButton resBtn;
        private RenderControlButton minBtn;

        #region event handler

        private void CloseBtnClick(object sender, EventArgs e)
        {
            if (_owner.CloseBox)
                _owner.Close();
        }

        private void MaxBtnClick(object sender, EventArgs e)
        {
            _owner.WindowState = FormWindowState.Maximized;
            if (_owner.MaximumSize == _owner.ClientSize)
                FormResize();
        }

        private void ResBtnClick(object sender, EventArgs e)
        {
            _owner.WindowState = FormWindowState.Normal;
            if (_owner.MaximumSize == _owner.ClientSize)
                FormResize();
        }

        private void MinBtnClick(object sender, EventArgs e)
        {
            _owner.WindowState = FormWindowState.Minimized;
        }

        #endregion

        private void SetControlBoxColor()
        {
            
            closeBtn.ColorTable = _owner.XTheme.CloseBoxColor;
            closeBtn.BackImageNormal = _owner.XTheme.CloseBoxBackImageNormal;
            closeBtn.BackImageHover = _owner.XTheme.CloseBoxBackImageHover;
            closeBtn.BackImagePressed = _owner.XTheme.CloseBoxBackImagePressed;

            // max res box
            if (_owner.MaximizeBox)
            {                
                maxBtn.ColorTable = _owner.XTheme.MaxBoxColor;
                maxBtn.BackImageNormal = _owner.XTheme.MaxBoxBackImageNormal;
                maxBtn.BackImageHover = _owner.XTheme.MaxBoxBackImageHover;
                maxBtn.BackImagePressed = _owner.XTheme.MaxBoxBackImagePressed;

                resBtn.ColorTable = _owner.XTheme.MaxBoxColor;                
                resBtn.BackImageNormal = _owner.XTheme.ResBoxBackImageNormal;
                resBtn.BackImageHover = _owner.XTheme.ResBoxBackImageHover;
                resBtn.BackImagePressed = _owner.XTheme.ResBoxBackImagePressed;
            }

            // min box
            if (_owner.MinimizeBox)
            {                
                minBtn.ColorTable = _owner.XTheme.MinBoxColor;
                minBtn.BackImageNormal = _owner.XTheme.MinBoxBackImageNormal;
                minBtn.BackImageHover = _owner.XTheme.MinBoxBackImageHover;
                minBtn.BackImagePressed = _owner.XTheme.MinBoxBackImagePressed;
            }

        }

        private void ControlBoxInit()
        {
            // close box
            if (_owner.CloseBox)
            {
                closeBtn = new RenderControlButton(_owner);
                closeBtn.Visible = true;
                closeBtn.Bounds = _owner.CloseBoxRect;

                closeBtn.Click += new EventHandler(CloseBtnClick);
                closeBtn.ForePathGetter = new ButtonForePathGetter(
                        GraphicsPathHelper.CreateCloseFlagPath);
            }

            // max res box
            if (_owner.MaximizeBox)
            {
                maxBtn = new RenderControlButton(_owner);
                resBtn = new RenderControlButton(_owner);

                if (_owner.WindowState == FormWindowState.Normal)
                {
                    maxBtn.Visible = true;
                    resBtn.Visible = false;
                }
                else
                {
                    maxBtn.Visible = false;
                    resBtn.Visible = true;
                }

                maxBtn.Bounds = _owner.MaxBoxRect;
                resBtn.Bounds = _owner.MaxBoxRect;

                maxBtn.Click += new EventHandler(MaxBtnClick);
                maxBtn.ForePathGetter = new ButtonForePathGetter(
                    GraphicsPathHelper.CreateMaximizeFlagPath);

                resBtn.Click += new EventHandler(ResBtnClick);
                resBtn.ForePathGetter = new ButtonForePathGetter(
                    GraphicsPathHelper.CreateRestoreFlagPath);
            }

            // min box
            if (_owner.MinimizeBox)
            {
                minBtn = new RenderControlButton(_owner);

                minBtn.Visible = true;
                minBtn.Bounds = _owner.MinBoxRect;

                minBtn.Click += new EventHandler(MinBtnClick);
                minBtn.ForePathGetter = new ButtonForePathGetter(
                    GraphicsPathHelper.CreateMinimizeFlagPath);
            }

            SetControlBoxColor();
        }

        public ControlBoxManager(BaseForm owner)
        {
            _owner = owner;
            ControlBoxInit();
        }

        public void FormResize()
        {
            if (maxBtn != null)
            {
                if (_owner.WindowState == FormWindowState.Normal)
                {
                    maxBtn.Visible = true;
                    resBtn.Visible = false;
                    resBtn.State = ButtonState.Normal;
                }
                else if (_owner.WindowState != FormWindowState.Minimized)
                {
                    resBtn.Visible = true;
                    maxBtn.Visible = false;
                    maxBtn.State = ButtonState.Normal;
                }
                resBtn.Bounds = maxBtn.Bounds = _owner.MaxBoxRect;
            }
            if (minBtn != null)
                minBtn.Bounds = _owner.MinBoxRect;
            if (closeBtn != null)
                closeBtn.Bounds = _owner.CloseBoxRect;
        }

        public void FormResize(bool WindowState)
        {
            if (maxBtn != null)
            {
                if (WindowState)
                {
                    resBtn.Visible = true;
                    maxBtn.Visible = false;
                    maxBtn.State = ButtonState.Normal;
                }
                else
                {                   
                    maxBtn.Visible = true;
                    resBtn.Visible = false;
                    resBtn.State = ButtonState.Normal;
                }
                resBtn.Bounds = maxBtn.Bounds = _owner.MaxBoxRect;
            }
            if (minBtn != null)
                minBtn.Bounds = _owner.MinBoxRect;
            if (closeBtn != null)
                closeBtn.Bounds = _owner.CloseBoxRect;
        }

        internal void FormResize(DelegateWindowState WindowState)
        {
            FormResize(WindowState.Invoke());
        }

        public void MouseOperation(Point location, MouseOperationType type)
        {
            if (closeBtn != null && closeBtn.Visible)
                closeBtn.MouseOperation(location, type);
            if (maxBtn != null && maxBtn.Visible)
                maxBtn.MouseOperation(location, type);
            if(resBtn!=null && resBtn.Visible)
                resBtn.MouseOperation(location, type);
            if(minBtn!=null)
                minBtn.MouseOperation(location, type);
        }

        public void DrawBoxes(System.Drawing.Graphics g) 
        {
            if (_owner.ControlBox) 
            {
                if (_owner.CloseBox && closeBtn != null)
                    closeBtn.DrawButton(g);
                if (_owner.MinimizeBox && minBtn != null)
                    minBtn.DrawButton(g);
                if (_owner.MaximizeBox)
                {
                    if (maxBtn != null & maxBtn.Visible)
                        maxBtn.DrawButton(g);
                    if (resBtn != null && resBtn.Visible)
                        resBtn.DrawButton(g);
                }
            }
        }

        public void ResetBoxColor()
        {
            SetControlBoxColor();
        }
    }
    
}