using System;
using System.Drawing;
using System.Windows.Forms;
using JD.Collections;
using PleoNET;

namespace JD.VideoPlayer.Project
{
    /// <summary>
    /// A control which holds a PleoControl and a PleoVideoClip
    /// </summary>
    public class VideoControl : PleoControl
    {
        private IVideoConductor _videoConductor;
        private bool _hightlighed;

        public VideoControl()
        {
            _videoConductor = null;
            Highlighted = false;
        }

        public IVideoConductor VideoConductor
        {
            get
            {
                return _videoConductor;
            }
            set
            {
                if (_videoConductor != value)
                {
                    if (null != _videoConductor)
                    {
                        _videoConductor.BeforeClipDispose -= VideoControl_BeforeClipDispose;
                        _videoConductor.ClipChanged -= VideoControl_ClipChanged;
                    }
                    _videoConductor = value;
                    if (null != _videoConductor)
                    {
                        _videoConductor.BeforeClipDispose += VideoControl_BeforeClipDispose;
                        _videoConductor.ClipChanged += VideoControl_ClipChanged;
                    }
                }
            }
        }

        protected override void Dispose(bool disposing)
        {
            // Detach events
            if (disposing)
            {
                VideoConductor = null;
            }

            base.Dispose(disposing);
        }

        protected void VideoControl_BeforeClipDispose(object sender, VideoConductorEventArgs args)
        {
            var clip = args.Clip;

            if (null != clip)
            {
                UnbindVideoClip();
            }
        }

        protected void VideoControl_ClipChanged(object sender, VideoConductorEventArgs args)
        {
            var clip = args.Clip;

            if (null != clip)
            {
                BindVideoClip(clip);
            }
        }

        /// <summary>
        /// Useful for community mashups where the video is filmed flipped.
        /// </summary>
        public bool FlipVideo { get; set; }

        public bool Highlighted
        {
            get { return _hightlighed; }
            set
            {
                _hightlighed = value;
                BackColor = Highlighted ? Color.FromArgb(255, 50, 50, 50) : Color.DimGray;
                Invalidate();
            }
        }

        protected bool HasNoClip
        {
            get
            {
                return (null == _videoConductor || null == _videoConductor.Clip);
            }
        }

        public new Bitmap Snapshot()
        {
            if (HasNoClip)
            {
                return null;
            }
            Update();
            return base.Snapshot();
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            var container = e.Graphics.BeginContainer();

            if (FlipVideo)
            {
                e.Graphics.TranslateTransform(Width, 0);
                e.Graphics.ScaleTransform(-1, 1);
            }

            base.OnPaint(e);
            e.Graphics.EndContainer(container);

            PaintText(e);
        }

        public void PaintText(PaintEventArgs e)
        {
            if (!string.IsNullOrEmpty(Text))
            {
                using (var brush = new SolidBrush(ForeColor))
                {
                    e.Graphics.DrawString(Text, DefaultFont, brush, Bounds);
                }
            }
        }

        public override bool PreProcessMessage(ref System.Windows.Forms.Message msg)
        {
            if (msg.Msg == TeaBox.Actions.ActionManager.WM_KEYDOWN)
            {
                long param = (long)msg.WParam;
                Keys keys = (Keys)param | Control.ModifierKeys;

                // Let the action manager handle the arrow keys.
                if (keys.IsIn(Keys.Left, Keys.Right, Keys.Up, Keys.Down, Keys.Tab | Keys.Shift))
                {
                    return false;
                }
            }

            return base.PreProcessMessage(ref msg);
        }
    }
}