package com.aaaaahhhhhhh.bananapuncher714.minietest;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

import com.aaaaahhhhhhh.bananapuncher714.mesh.Mesh;
import com.aaaaahhhhhhh.bananapuncher714.mesh.Point;
import com.aaaaahhhhhhh.bananapuncher714.mesh.Polygon;
import com.aaaaahhhhhhh.bananapuncher714.mesh.region.simple.RegionRuleWinding;
import com.aaaaahhhhhhh.bananapuncher714.mesh.region.simple.RegionSimple;
import com.aaaaahhhhhhh.bananapuncher714.mesh.region.simple.RegionSimple.GluWindingRule;

/**
 * Mesh speed test for polygons
 */
public class MeshingTest7 {
    private static final File BASE = new File( System.getProperty( "user.dir" ) );
    private static final File POLYGON_DIR = new File( BASE, "polygons" );

    public static void main( String[] args ) {
        if ( POLYGON_DIR.exists() && POLYGON_DIR.isDirectory() ) {
            System.out.println( "Found " + POLYGON_DIR.list().length + " files" );

            final long allStart = System.currentTimeMillis();
            final AtomicInteger index = new AtomicInteger( 0 );
            final Collection< File > files = Arrays.asList( POLYGON_DIR.listFiles() );
            files.parallelStream().forEach( f -> {
                final StringBuilder builder = new StringBuilder();

                builder.append( "Meshing file: " + f + "\n" );
                
                final long start = System.currentTimeMillis();
                final List< Polygon > polygons = mesh( f, builder );
                
                Mesh< RegionSimple > mesh = new Mesh< RegionSimple >( () -> { return new RegionSimple( GluWindingRule.ODD ); } );
                for ( Polygon poly : polygons ) {
                    mesh.addPolygon( poly, RegionRuleWinding.CLOCKWISE );
                }

                mesh.meshify();
                
                long time = System.currentTimeMillis() - start;
                
                builder.append( "\tTook " + time + "ms\n" );
                builder.append( "\tCompleted " + index.incrementAndGet() + "/" + files.size() );
                
                System.out.println( builder.toString() );
            } );
            System.out.println( "Took a total of " + ( System.currentTimeMillis() - allStart ) + "ms" );
        } else {
            System.err.println( "No such directory exists: " + POLYGON_DIR );
        }
    }
    
    private static List< Polygon > mesh( File file, final StringBuilder stringBuilder ) {
        // First parse the file to get a list of all polygons
        final List< Polygon > polys = new ArrayList< Polygon >();
        try ( BufferedReader reader = new BufferedReader( new FileReader( file ) ) ) {
            String line;
            while ( ( line = reader.readLine() ) != null ) {
                if ( !line.isEmpty() ) {
                    final int pointCount = Integer.parseInt( line );

                    List< Point > points = new ArrayList< Point >( pointCount );
                    
                    int point = 0;
                    while ( point < pointCount && ( line = reader.readLine() ) != null ) {
                        if ( !line.isEmpty() ) {
                            String[] values2 = line.split( " " );
                            final double px = Double.parseDouble( values2[ 0 ] );
                            final double py = Double.parseDouble( values2[ 1 ] );
                            points.add( new Point( px, py ) );
                            ++point;
                        }
                    }
                    
                    polys.add( new Polygon( points ) ) ;
                }
            }
        } catch ( FileNotFoundException e ) {
            e.printStackTrace();
            return null;
        } catch ( IOException e ) {
            e.printStackTrace();
            return null;
        }
        
        return polys;
    }
}