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package org.pitest.coverage.export;

import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.pitest.coverage.BlockCoverage;
import org.pitest.coverage.CoverageExporter;
import org.pitest.mutationtest.engine.Location;
import org.pitest.util.ResultOutputStrategy;
import org.pitest.util.Unchecked;

import static org.apache.commons.text.StringEscapeUtils.escapeXml11;

/**
 * Quick and dirty export of coverage data into XML
 */
public class DefaultCoverageExporter implements CoverageExporter {

  private final ResultOutputStrategy outputStrategy;

  public DefaultCoverageExporter(final ResultOutputStrategy outputStrategy) {
    this.outputStrategy = outputStrategy;
  }

  @Override
  public void recordCoverage(final Collection coverage) {
    final Writer out = this.outputStrategy
        .createWriterForFile("linecoverage.xml");
    writeHeader(out);
    for (final BlockCoverage each : coverage) {
      writeLineCoverage(each, out);
    }

    writeFooterAndClose(out);
  }

  private void writeHeader(final Writer out) {
    write(out, "\n");
    write(out, "\n");
  }

  private void writeLineCoverage(final BlockCoverage each, final Writer out) {
    final Location l = each.getBlock().getLocation();
    write(
        out,
        "");
    write(out, "\n");
    final List ts = new ArrayList<>(each.getTests());
    Collections.sort(ts);
    for (final String test : ts) {
      write(out, "\n");
    }
    write(out, "\n");
    write(out, "\n");
  }

  private void writeFooterAndClose(final Writer out) {
    try {
      write(out, "\n");
      out.close();
    } catch (final IOException e) {
      throw Unchecked.translateCheckedException(e);
    }
  }

  private void write(final Writer out, final String value) {
    try {
      out.write(value);
    } catch (final IOException e) {
      throw Unchecked.translateCheckedException(e);
    }
  }

}