using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Vision.Motion;
using AForge.Imaging;
using System.Collections;
using Background_Filter;


namespace VideoPlayer
{
    public partial class VideoPlayerForm : Form
    {
        private FileVideoSource videoSource;

        private int frameCount;

        private Boolean videoPaused = false;

        private BackgroundFilterBase filter;

        private Bitmap currentFrame;

        private Bitmap motionFrame;

        public VideoPlayerForm()
        {
            InitializeComponent();

        }

        private void loadButton_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                loadVideoFromFile(openFileDialog1.FileName);               
            }

            surpressNoiseCheckbox.Checked = false;

        }

        private void loadVideoFromFile(String fileName)
        {
            videoSource = new FileVideoSource(fileName);

            // New frame event handler, which is invoked on each new available video frame
            videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);

        }

        private void startButton_Click(object sender, EventArgs e)
        {
            frameCount = 0;
            videoSource.Start();
        }

        private void pauseButton_Click(object sender, EventArgs e)
        {
            videoPaused = !videoPaused;
        }


        // New frame event handler, which is invoked on each new available video frame
        private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            // Get new frame
            currentFrame = (Bitmap)(eventArgs.Frame.Clone());

            motionFrame = (Bitmap)(eventArgs.Frame.Clone());

            // Display the frame
            if (!videoPaused)
            {
                pictureBox1.Image = currentFrame;
            
                // Load frame from background subtraction algorithm
                if (filter != null)
                {

                    filter.ProcessFrame(motionFrame);

                    motionFrame = filter.MotionFrame;

                    pictureBox2.Image = motionFrame;
                }      

            }

            frameLabel.Text = "Frame: " + frameCount++;
        }


        private void stopButton_Click_1(object sender, EventArgs e)
        {
            videoSource.Stop();
        }

      
        private void VideoPlayerForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            videoSource.Stop();
        }

        private void twoFrameDifferenceButton_Click(object sender, EventArgs e)
        {
            if (currentFrame != null)
            {
                Boolean surpressNoise = surpressNoiseCheckbox.Checked;
                filter = new TwoFrameDifferencingFilter(currentFrame, surpressNoise);
            }
        }

        private void backgroundSubtractionButton_Click(object sender, EventArgs e)
        {
            if (currentFrame != null)
            {
                Boolean surpressNoise = surpressNoiseCheckbox.Checked;
                filter = new BackgroundSubtractionFilter(currentFrame, surpressNoise, 0.5);
            }
        }

        private void backgroundSubtractionMedianButton_Click(object sender, EventArgs e)
        {
            if (currentFrame != null)
            {
                Boolean surpressNoise = surpressNoiseCheckbox.Checked;
                filter = new BackgroundSubtractionMedianFilter(currentFrame, surpressNoise, 9);
            }
        }

        private void GaussianModelButton_Click(object sender, EventArgs e)
        {
            if (currentFrame != null)
            {
                Boolean surpressNoise = surpressNoiseCheckbox.Checked;
                filter = new GaussianModelFilter(currentFrame, surpressNoise, 0.3);
            }
        }

        private void relaxationLabellingButton_Click(object sender, EventArgs e)
        {
            if (currentFrame != null)
            {
                Boolean surpressNoise = surpressNoiseCheckbox.Checked;
                filter = new RelaxationLabellingFilter(currentFrame, surpressNoise, 0.1);
            }
        }
   

        private void surpressNoiseCheckbox_CheckedChanged(object sender, EventArgs e)
        {

            if ((surpressNoiseCheckbox.Checked) && (filter != null))
                filter.SuppressNoise = true;
            else if ((!surpressNoiseCheckbox.Checked) && (filter != null))
                filter.SuppressNoise = false;
        }

        
    }
}