package btools.expressions;

import java.io.File;
import java.util.Random;

public final class ProfileComparator {
  public static void main(String[] args) {
    if (args.length != 4) {
      System.out.println("usage: java ProfileComparator <lookup-file> <profile1> <profile2> <nsamples>");
      return;
    }

    File lookupFile = new File(args[0]);
    File profile1File = new File(args[1]);
    File profile2File = new File(args[2]);
    int nsamples = Integer.parseInt(args[3]);
    testContext(lookupFile, profile1File, profile2File, nsamples, false);
    testContext(lookupFile, profile1File, profile2File, nsamples, true);

  }

  private static void testContext(File lookupFile, File profile1File, File profile2File, int nsamples, boolean nodeContext) {
    // read lookup.dat + profiles
    BExpressionMetaData meta1 = new BExpressionMetaData();
    BExpressionMetaData meta2 = new BExpressionMetaData();
    BExpressionContext expctx1 = nodeContext ? new BExpressionContextNode(meta1) : new BExpressionContextWay(meta1);
    BExpressionContext expctx2 = nodeContext ? new BExpressionContextNode(meta2) : new BExpressionContextWay(meta2);

    // if same profiles, compare different optimization levels
    if (profile1File.getName().equals(profile2File.getName())) {
      expctx2.skipConstantExpressionOptimizations = true;
    }

    meta1.readMetaData(lookupFile);
    meta2.readMetaData(lookupFile);
    expctx1.parseFile(profile1File, "global");
    System.out.println("usedTags1=" +  expctx1.usedTagList());
    expctx2.parseFile(profile2File, "global");
    System.out.println("usedTags2=" +  expctx2.usedTagList());

    System.out.println("nodeContext=" + nodeContext + " nodeCount1=" + expctx1.expressionNodeCount + " nodeCount2=" + expctx2.expressionNodeCount);

    Random rnd = new Random();
    for (int i = 0; i < nsamples; i++) {
      int[] data = expctx1.generateRandomValues(rnd);
      expctx1.evaluate(data);
      expctx2.evaluate(data);

      expctx1.assertAllVariablesEqual(expctx2);
    }
  }
}