package org.simantics.district.network.ui.nodes;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.simantics.district.network.visualisations.model.ColorBarOptions;
import org.simantics.district.network.visualisations.model.ColorBarOptions.ColorBarsLocation;
import org.simantics.district.network.visualisations.model.ColorBarOptions.ColorBarsSize;
import org.simantics.district.network.visualisations.model.DynamicColorContribution;
import org.simantics.district.network.visualisations.model.DynamicColorMap;
import org.simantics.district.network.visualisations.model.DynamicColorMap.RGBIntensity;
import org.simantics.district.network.visualisations.model.DynamicSizeContribution;
import org.simantics.district.network.visualisations.model.DynamicSizeMap;
import org.simantics.district.network.visualisations.model.SizeBarOptions;
import org.simantics.district.network.visualisations.model.SizeBarOptions.SizeBarsLocation;
import org.simantics.district.network.visualisations.model.SizeBarOptions.SizeBarsSize;
import org.simantics.scenegraph.g2d.G2DNode;
import org.simantics.scenegraph.utils.DPIUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DynamicVisualisationContributionsNode extends G2DNode {

    private static final Logger LOGGER = LoggerFactory.getLogger(DynamicVisualisationContributionsNode.class);

    public static final String ID = "dynamicVisualisationContributionsNode";
    
    private static final long serialVersionUID = 7400966702826774761L;

    protected boolean enabled = true;

    private Map<String, DynamicColorContribution> dynamicColoringContributions;
    private Map<String, DynamicSizeContribution> dynamicSizingContributions;
    
    private ColorBarOptions colorBarsOptions = ColorBarOptions.useDefault();
    private SizeBarOptions sizeBarsOptions = SizeBarOptions.useDefault();

    @Override
    public void render(Graphics2D g2d) {
        if (!enabled)
            return;
        
        AffineTransform ot = g2d.getTransform();
        Color oldColor = g2d.getColor();
        
        try {
            g2d.transform(transform);
            g2d.setTransform(new AffineTransform());
            
            Rectangle2D bounds = g2d.getClipBounds();
            if (bounds == null)
                return; // FIXME
            
            renderColors(g2d);
            renderSizes(g2d);
        } finally {
            g2d.setColor(oldColor);
            g2d.setTransform(ot);
        }
    }

    private double colorBarBoxWidth = 300;
    private double colorBarBoxHeight = 50;
    private double colorBarBoxPadding = 20;

    private void renderColors(Graphics2D g2d) {
        if (colorBarsOptions == null || !colorBarsOptions.isShowColorBars()) {
            return;
        }
        ColorBarsLocation location = colorBarsOptions.getLocation();
        ColorBarsSize size = colorBarsOptions.getSize();
        double colorBarBoxLeft = getColorBarBoxLeft(g2d, location, size);
        double colorBarBoxTopInitial = getColorBarBoxTop(g2d, location, size);
        double colorBarBoxWidth = getColorBarBoxWidth(size);
        double colorBarBoxHeight = getColorBarBoxHeight(size);
        
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            return; // FIXME
        
        int i = 0;
        
        if (dynamicColoringContributions != null) {
            for (Entry<String, DynamicColorContribution> object : dynamicColoringContributions.entrySet()) {
                DynamicColorContribution cc = object.getValue();
                
                if (!cc.isUsed())
                    break;
                
                double min = cc.getDefaultMin();
                double max = cc.getDefaultMax();
                String unit = cc.getUnit();
                String label = cc.getLabel();
                
                DynamicColorMap map = cc.getDefaultColorMap();
                
                double colorBarBoxTop = (colorBarBoxTopInitial + (colorBarBoxHeight * i));
                i++;

                g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
                g2d.setColor(new Color(0.9f, 0.9f, 0.9f, 0.95f));
                
                Rectangle2D vertical = new Rectangle2D.Double(colorBarBoxLeft, colorBarBoxTop, colorBarBoxWidth, colorBarBoxHeight);
                g2d.fill(vertical);
                
                double colorVerticalLeft = colorBarBoxLeft + 5;
                double colorVerticalTop = colorBarBoxTop + 15;
                double colorVerticalHeigth = colorBarBoxHeight - 30;
                List<RGBIntensity> intensities = map.getIntensities();
                double colorVerticalWidth = (colorBarBoxWidth - 10) / intensities.size();
                
                Font rulerFont = new Font("Tahoma", Font.PLAIN, DPIUtil.upscale(9));
                g2d.setFont(rulerFont);
                g2d.setColor(Color.BLACK);
                
                String str = Double.toString(max);
                g2d.drawString(str, (int)(colorBarBoxLeft + colorBarBoxWidth - 30), (int)(colorBarBoxTop  + colorBarBoxHeight));
                
                str = Double.toString(min);
                g2d.drawString(str, (int)colorBarBoxLeft + 1, (int)(colorBarBoxTop + colorBarBoxHeight));
                
                
                for (RGBIntensity intensity : intensities) {
                    
                    g2d.setColor(new Color((float)intensity.getRed(), (float)intensity.getGreen(), (float)intensity.getBlue(), 1f));
                    Rectangle2D colorVertical = new Rectangle2D.Double(colorVerticalLeft, colorVerticalTop, colorVerticalWidth, colorVerticalHeigth);
                    g2d.fill(colorVertical);
                    colorVerticalLeft = colorVerticalLeft + colorVerticalWidth;
                }
                g2d.setColor(Color.BLACK);
                str = object.getKey() + " - " + label + " [" + unit + "]";
                g2d.drawString(str, (int)colorBarBoxLeft + 5, (int)colorBarBoxTop + 10);
            }
        }
    }

    private double getColorBarBoxTop(Graphics2D g2d, ColorBarsLocation location, ColorBarsSize size) {
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            throw new IllegalStateException();
        switch (location) {
            case NORTH: {
                return colorBarBoxPadding;
            }
            case SOUTH: {
                return bounds.getMaxY() - colorBarBoxPadding;
            }
            case EAST:
            case WEST: {
                return (bounds.getMaxY() / 2) - (getColorBarBoxHeight(size) / 2);
            }
            default:
                return 0;
        }
    }
    
    private double getColorBarBoxLeft(Graphics2D g2d, ColorBarsLocation location, ColorBarsSize size) {
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            throw new IllegalStateException();
        switch (location) {
            case EAST: {
                double right = bounds.getMaxX() - colorBarBoxPadding;
                return right - getColorBarBoxWidth(size);
            }
            case WEST: {
                return colorBarBoxPadding;
            }
            case NORTH:
            case SOUTH: {
                double left = (bounds.getMaxX() / 2) - (getColorBarBoxWidth(size) / 2);
                return left;
            }
            default:
                return 0;
        }
    }

    private double getColorBarBoxWidth(ColorBarsSize size) {
        return size.getSize() * colorBarBoxWidth;
    }

    private double getColorBarBoxHeight(ColorBarsSize size) {
        return size.getSize() * colorBarBoxHeight;
    }

    private void renderSizes(Graphics2D g2d) {
        if (sizeBarsOptions == null || !sizeBarsOptions.isShowSizeBars()) {
            return;
        }
        SizeBarsLocation location = sizeBarsOptions.getLocation();
        SizeBarsSize sizeb = sizeBarsOptions.getSize();
        double sizeBarBoxLeft = getSizeBarBoxLeft(g2d, location, sizeb);
        double sizeBarBoxTopInitial = getSizeBarBoxTop(g2d, location, sizeb);
        double sizeBarBoxWidth = getSizeBarBoxWidth(sizeb);
        double sizeBarBoxHeight = getSizeBarBoxHeight(sizeb);
        
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            return; // FIXME
        
        int i = 0;
        
        for (Entry<String, DynamicSizeContribution> object : dynamicSizingContributions.entrySet()) {
            DynamicSizeContribution cc = object.getValue();
            
            double min = cc.getDefaultMin();
            double max = cc.getDefaultMax();
            String unit = cc.getUnit();
            String label = cc.getLabel();
            
            DynamicSizeMap map = cc.getDefaultSizeMap();
            
            List<Double> sizes = map.getSizes();
            
            double sizeBarBoxTop = (sizeBarBoxTopInitial + (colorBarBoxHeight * i));
            i++;
//                double backgroundBoxPaddingRight = 20;
//                double backgroundBoxHeight = 50;
//                double backgroundBoxWidth = 300;
//                double backgroundBoxRight = bounds.getMaxX() - backgroundBoxPaddingRight;
//                double backgroundBoxLeft = backgroundBoxRight - backgroundBoxWidth;
//                double backgroundBoxTop = bounds.getMaxY();// + (initialPosition + (position * i));
            g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
            g2d.setColor(new Color(0.9f, 0.9f, 0.9f, 0.95f));
            
            Rectangle2D vertical = new Rectangle2D.Double(sizeBarBoxLeft, sizeBarBoxTop, colorBarBoxWidth, colorBarBoxHeight);
            g2d.fill(vertical);
            
            double sizeVerticalLeft = sizeBarBoxLeft + 5;
            double sizeVerticalTop = sizeBarBoxTop + 15;
            double sizeVerticalHeigth = colorBarBoxHeight - 30;

            double sizeVerticalWidth = (sizeBarBoxWidth - 10) / sizes.size();
            
            Font rulerFont = new Font("Tahoma", Font.PLAIN, DPIUtil.upscale(9));
            g2d.setFont(rulerFont);
            g2d.setColor(Color.BLACK);
            
            String str = Double.toString(max);
            g2d.drawString(str, (int)(sizeBarBoxLeft + sizeBarBoxWidth - 30), (int)(sizeBarBoxTop + sizeBarBoxHeight));
            
            str = Double.toString(min);
            g2d.drawString(str, (int)sizeBarBoxLeft + 1, (int)(sizeBarBoxTop + sizeBarBoxHeight));
            
            
            g2d.setColor(new Color((float)0, (float)0, (float)0.8, 0.8f));
            for (Double size: sizes) {
                
                Ellipse2D ellipse = new Ellipse2D.Double(sizeVerticalLeft + sizeVerticalWidth / 2, (sizeVerticalTop), size * sizeVerticalHeigth, size * sizeVerticalHeigth);
                g2d.fill(ellipse);
                
                sizeVerticalLeft = sizeVerticalLeft + sizeVerticalWidth;
            }
            g2d.setColor(Color.BLACK);
            str = object.getKey() + " - " + label + " [" + unit + "]";
            g2d.drawString(str, (int)sizeBarBoxLeft + 5, (int)sizeBarBoxTop + 10);
        }
    }
    
    private double getSizeBarBoxTop(Graphics2D g2d, SizeBarsLocation location, SizeBarsSize size) {
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            throw new IllegalStateException();
        switch (location) {
            case NORTH: {
                return colorBarBoxPadding;
            }
            case SOUTH: {
                return bounds.getMaxY() - colorBarBoxPadding;
            }
            case EAST:
            case WEST: {
                return (bounds.getMaxY() / 2) - (getSizeBarBoxHeight(size) / 2);
            }
            default:
                return 0;
        }
    }
    
    private double getSizeBarBoxLeft(Graphics2D g2d, SizeBarsLocation location, SizeBarsSize size) {
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            throw new IllegalStateException();
        switch (location) {
            case EAST: {
                double right = bounds.getMaxX() - colorBarBoxPadding;
                return right - getSizeBarBoxWidth(size);
            }
            case WEST: {
                return colorBarBoxPadding;
            }
            case NORTH:
            case SOUTH: {
                double left = (bounds.getMaxX() / 2) - (getSizeBarBoxWidth(size) / 2);
                return left;
            }
            default:
                return 0;
        }
    }

    private double getSizeBarBoxWidth(SizeBarsSize size) {
        return size.getSize() * colorBarBoxWidth;
    }

    private double getSizeBarBoxHeight(SizeBarsSize size) {
        return size.getSize() * colorBarBoxHeight;
    }

    @Override
    public Rectangle2D getBoundsInLocal() {
        return null;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    public void setDynamicColoringObjects(Map<String,DynamicColorContribution> dynamicColoringObjects) {
        this.dynamicColoringContributions = dynamicColoringObjects;
    }

    public void setColorBarOptions(ColorBarOptions colorBarsOptions) {
        this.colorBarsOptions = colorBarsOptions;
    }

    public void setDynamicSizingObjects(Map<String, DynamicSizeContribution> dynamicSizingObjects) {
        this.dynamicSizingContributions = dynamicSizingObjects;
    }

    public void setSizeBarOptions(SizeBarOptions sizeBarOptions) {
        this.sizeBarsOptions = sizeBarOptions;
    }

}