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package com.flashphoner.mixerlayout;

// Import mixer layout interface
import com.flashphoner.media.mixer.video.presentation.BoxPosition;
import com.flashphoner.sdk.media.IVideoMixerLayout;
// Import YUV frame description
import com.flashphoner.sdk.media.YUVFrame;
// Import Box class for picture operations
import com.flashphoner.media.mixer.video.presentation.Box;
// Uncomment this if using build 5.2.878-5.2.976
// import com.flashphoner.server.commons.rmi.data.impl.MixerConfig;

// Import Java packages to use
import java.awt.*;
import java.util.ArrayList;

public class SideBySideLayout implements IVideoMixerLayout {
    // Owner's stream name
    private static final String USERFOR = "user_for";
    // Challenger's stream name
    private static final String USERAGAINST = "user_against";

    /**
     * Function to compute layout, will be called by mixer before encoding output stream picture
     * This example computes grid layout
     * @param yuvFrames - incoming streams raw pictures array in YUV format
     * @param strings - incoming streams names array
     * @param canvasWidth - mixer output picture canwas width
     * @param canvasHeight - mixer output picture canwas heigth
     * @return array of pictures layouts
     */
    @Override
    public Layout[] computeLayout(YUVFrame[] yuvFrames, String[] strings, int canvasWidth, int canvasHeight) {
        // This object represents mixer canvas
        Box mainBox = new Box(null, canvasWidth, canvasHeight);

        // Container to place CHALLENGER stream pictures
        Box userForContainer = new Box(mainBox, canvasWidth / 2, canvasHeight);
        userForContainer.setPosition(BoxPosition.LEFT);
        // Container to place OWNER stream pictures
        Box userAgainstContainer = new Box(mainBox, canvasWidth / 2, canvasHeight);
        userAgainstContainer.setPosition(BoxPosition.RIGHT);

        // Iterate through incoming stream pictures array
        for (int c = 0; c < yuvFrames.length; c++) {
            String name = strings[c];
            Box container;
            
            // Chhose container depending on stream name
            if (name.contains(USERFOR)) {
                container = userForContainer;
            } else if (name.contains(USERAGAINST)) {
                container = userAgainstContainer;
            } else {
                // Wrong stream name
                continue;
            }
            // Fill the container by the stream picture
            Box frameBox = Box.computeBoxWithFrame(container, yuvFrames[c]);
            frameBox.fillParentNoScale();
        }        
        // Prepare an array to return layout calculated
        ArrayList<IVideoMixerLayout.Layout> layout = new ArrayList<>();
        // Calculate mixer layout
        mainBox.computeLayout(layout);
        // Return the result
        return layout.toArray(new IVideoMixerLayout.Layout[layout.size()]);        
    }
    
    /**
     * The function for internal use.
     * Uncomment this if using build 5.2.878-5.2.976
     */
    //@Override
    //public void setConfig(MixerConfig mixerConfig) {
    //}
}