using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using JD.Audio.SoundPlayer;
using JD.Kernel.StaticHelpers;
using JD.Sequencers.Windowlesses;
using TeaBox;

namespace JD.Application.View.WindowLess
{
    internal class CheckpointWidget : WindowlessControl
    {
        private readonly Checkpoint _model;
        private readonly global::JD.Sequencers.Times.Timeline _timeline;
        private readonly Pen _pen = new Pen(Color.FromArgb(100, Color.WhiteSmoke), 1);

        public CheckpointWidget(Checkpoint model, global::JD.Sequencers.Times.Timeline timeline)
        {
            Throw.IfNull(model, "model");
            Throw.IfNull(timeline, "timeline");

            _pen.DashStyle = DashStyle.Dash;

            _model = model;
            _timeline = timeline;

            _model.Changed += updateBounds;
            _timeline.PixelsPerTimeChanged += updateBounds;
            _timeline.TimeOffsetChanged += updateBounds;
            updateBounds(null, null);
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
            _model.Changed -= updateBounds;
            _timeline.PixelsPerTimeChanged -= updateBounds;
            _timeline.TimeOffsetChanged -= updateBounds;
        }

        void updateBounds(object sender, System.EventArgs e)
        {
            if (_model.Time.HasValue && Parent != null)
            {
                float position = _timeline.TimeToPixel(_model.Time.Value);

                var bounds = Bounds;
                bounds.Y = Parent.Bounds.Y;
                bounds.Height = Parent.Bounds.Height;
                bounds.X = (int) position - 1;
                bounds.Width = (int)(position + 1);
                Bounds = bounds;
                IsVisible = true;
            }
            else if (IsVisible)
            {
                Invalidate();
                IsVisible = false;
            }
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            base.OnPaint(e);

            if (IsVisible)
            {
                var bounds = Bounds;
                e.Graphics.DrawLine(_pen, bounds.X, bounds.Top, bounds.X, bounds.Bottom);
            }
        }
    }
}