/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.lucene.search.uhighlight;

import org.apache.lucene.search.highlight.DefaultEncoder;
import org.apache.lucene.search.highlight.SimpleHTMLEncoder;
import org.apache.lucene.search.uhighlight.Passage;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.test.ESTestCase;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.notNullValue;

public class CustomPassageFormatterTests extends ESTestCase {
    public void testSimpleFormat() {
        String content = "This is a really cool highlighter. Unified highlighter gives nice snippets back. No matches here.";

        CustomPassageFormatter passageFormatter = new CustomPassageFormatter("<em>", "</em>", new DefaultEncoder(), 3);

        Passage[] passages = new Passage[3];
        String match = "highlighter";
        BytesRef matchBytesRef = new BytesRef(match);

        Passage passage1 = new Passage();
        int start = content.indexOf(match);
        int end = start + match.length();
        passage1.setStartOffset(0);
        passage1.setEndOffset(end + 2); // lets include the whitespace at the end to make sure we trim it
        passage1.addMatch(start, end, matchBytesRef, 1);
        passages[0] = passage1;

        Passage passage2 = new Passage();
        start = content.lastIndexOf(match);
        end = start + match.length();
        passage2.setStartOffset(passage1.getEndOffset());
        passage2.setEndOffset(end + 26);
        passage2.addMatch(start, end, matchBytesRef, 1);
        passages[1] = passage2;

        Passage passage3 = new Passage();
        passage3.setStartOffset(passage2.getEndOffset());
        passage3.setEndOffset(content.length());
        passages[2] = passage3;

        Snippet[] fragments = passageFormatter.format(passages, content);
        assertThat(fragments, notNullValue());
        assertThat(fragments.length, equalTo(3));
        assertThat(fragments[0].getText(), equalTo("This is a really cool <em>highlighter</em>."));
        assertThat(fragments[0].isHighlighted(), equalTo(true));
        assertThat(fragments[1].getText(), equalTo("Unified <em>highlighter</em> gives nice snippets back."));
        assertThat(fragments[1].isHighlighted(), equalTo(true));
        assertThat(fragments[2].getText(), equalTo("No matches here."));
        assertThat(fragments[2].isHighlighted(), equalTo(false));
    }

    public void testHtmlEncodeFormat() {
        String content = "<b>This is a really cool highlighter.</b> Unified highlighter gives nice snippets back.";

        CustomPassageFormatter passageFormatter = new CustomPassageFormatter("<em>", "</em>", new SimpleHTMLEncoder(), 3);

        Passage[] passages = new Passage[2];
        String match = "highlighter";
        BytesRef matchBytesRef = new BytesRef(match);

        Passage passage1 = new Passage();
        int start = content.indexOf(match);
        int end = start + match.length();
        passage1.setStartOffset(0);
        passage1.setEndOffset(end + 6); // lets include the whitespace at the end to make sure we trim it
        passage1.addMatch(start, end, matchBytesRef, 1);
        passages[0] = passage1;

        Passage passage2 = new Passage();
        start = content.lastIndexOf(match);
        end = start + match.length();
        passage2.setStartOffset(passage1.getEndOffset());
        passage2.setEndOffset(content.length());
        passage2.addMatch(start, end, matchBytesRef, 1);
        passages[1] = passage2;

        Snippet[] fragments = passageFormatter.format(passages, content);
        assertThat(fragments, notNullValue());
        assertThat(fragments.length, equalTo(2));
        assertThat(fragments[0].getText(), equalTo("&lt;b&gt;This is a really cool <em>highlighter</em>.&lt;&#x2F;b&gt;"));
        assertThat(fragments[1].getText(), equalTo("Unified <em>highlighter</em> gives nice snippets back."));
    }
}