/* This file is part of the KDE libraries
   Copyright (C) 2010 Bernhard Beschow <bbeschow@cs.tu-berlin.de>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include "plaintextsearch_test.h"
#include "moc_plaintextsearch_test.cpp"

#include <kateglobal.h>
#include <katedocument.h>
#include <kateplaintextsearch.h>

#include <QtTestWidgets>

QTEST_MAIN(PlainTextSearchTest)

QtMessageHandler PlainTextSearchTest::s_msgHandler = nullptr;

void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
    switch (type) {
    case QtDebugMsg:
        /* do nothing */
        break;
    default:
        PlainTextSearchTest::s_msgHandler(type, context, msg);
    }
}

void PlainTextSearchTest::initTestCase()
{
    KTextEditor::EditorPrivate::enableUnitTestMode();
    s_msgHandler = qInstallMessageHandler(myMessageOutput);
}

void PlainTextSearchTest::cleanupTestCase()
{
    qInstallMessageHandler(nullptr);
}

PlainTextSearchTest::PlainTextSearchTest()
    : QObject()
{
}

PlainTextSearchTest::~PlainTextSearchTest()
{
}

void PlainTextSearchTest::init()
{
    m_doc = new KTextEditor::DocumentPrivate(false, false, nullptr, this);
    m_search = new KatePlainTextSearch(m_doc, Qt::CaseSensitive, false);
}

void PlainTextSearchTest::cleanup()
{
    delete m_search;
    delete m_doc;
}

void PlainTextSearchTest::testSearchBackward_data()
{
    QTest::addColumn<KTextEditor::Range>("searchRange");
    QTest::addColumn<KTextEditor::Range>("expectedResult");

    QTest::newRow("") << KTextEditor::Range(0, 0, 1, 10) << KTextEditor::Range(1,  6, 1, 10);
    QTest::newRow("") << KTextEditor::Range(0, 0, 1,  5) << KTextEditor::Range(1,  0, 1,  4);
    QTest::newRow("") << KTextEditor::Range(0, 0, 1,  0) << KTextEditor::Range(0, 10, 0, 14);
}

void PlainTextSearchTest::testSearchBackward()
{
    QFETCH(KTextEditor::Range, searchRange);
    QFETCH(KTextEditor::Range, expectedResult);

    m_doc->setText(QLatin1String("aaaa aaaa aaaa\n"
                                 "aaaa  aaaa"));

    QCOMPARE(m_search->search(QLatin1String("aaaa"), searchRange, true), expectedResult);
}

void PlainTextSearchTest::testSingleLineDocument_data()
{
    QTest::addColumn<KTextEditor::Range>("searchRange");
    QTest::addColumn<KTextEditor::Range>("forwardResult");
    QTest::addColumn<KTextEditor::Range>("backwardResult");

    QTest::newRow("[a a a a a a a a a a a a]") << KTextEditor::Range(0,  0, 0, 23) << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0, 18, 0, 23);
    QTest::newRow("[a a a a a a a a a a a ]a") << KTextEditor::Range(0,  0, 0, 22) << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0, 16, 0, 21);
    QTest::newRow("a[ a a a a a a a a a a a]") << KTextEditor::Range(0,  1, 0, 23) << KTextEditor::Range(0,  2, 0,  7) << KTextEditor::Range(0, 18, 0, 23);
    QTest::newRow("a[ a a a a a a a a a a ]a") << KTextEditor::Range(0,  1, 0, 22) << KTextEditor::Range(0,  2, 0,  7) << KTextEditor::Range(0, 16, 0, 21);
    QTest::newRow("[a a a a] a a a a a a a a") << KTextEditor::Range(0,  0, 0,  7) << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0,  2, 0,  7);
    QTest::newRow("[a a a ]a a a a a a a a a") << KTextEditor::Range(0,  0, 0,  6) << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0,  0, 0,  5);
    QTest::newRow("[a a a] a a a a a a a a a") << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0,  0, 0,  5) << KTextEditor::Range(0,  0, 0,  5);
    QTest::newRow("[a a ]a a a a a a a a a a") << KTextEditor::Range(0,  0, 0,  4) << KTextEditor::Range::invalid()    << KTextEditor::Range::invalid();
    QTest::newRow("a a a a a a a a [a a a a]") << KTextEditor::Range(0, 16, 0, 23) << KTextEditor::Range(0, 16, 0, 21) << KTextEditor::Range(0, 18, 0, 23);
    QTest::newRow("a a a a a a a a a[ a a a]") << KTextEditor::Range(0, 17, 0, 23) << KTextEditor::Range(0, 18, 0, 23) << KTextEditor::Range(0, 18, 0, 23);
    QTest::newRow("a a a a a a a a a [a a a]") << KTextEditor::Range(0, 18, 0, 23) << KTextEditor::Range(0, 18, 0, 23) << KTextEditor::Range(0, 18, 0, 23);
    QTest::newRow("a a a a a a a a a a[ a a]") << KTextEditor::Range(0, 19, 0, 23) << KTextEditor::Range::invalid()    << KTextEditor::Range::invalid();
    QTest::newRow("a a a a a[ a a a a] a a a") << KTextEditor::Range(0,  9, 0, 17) << KTextEditor::Range(0, 10, 0, 15) << KTextEditor::Range(0, 12, 0, 17);
    QTest::newRow("a a a a a[ a a] a a a a a") << KTextEditor::Range(0,  9, 0, 13) << KTextEditor::Range::invalid()    << KTextEditor::Range::invalid();
}

void PlainTextSearchTest::testSingleLineDocument()
{
    QFETCH(KTextEditor::Range, searchRange);
    QFETCH(KTextEditor::Range, forwardResult);
    QFETCH(KTextEditor::Range, backwardResult);

    m_doc->setText(QLatin1String("a a a a a a a a a a a a"));

    QCOMPARE(m_search->search(QLatin1String("a a a"), searchRange, false), forwardResult);
    QCOMPARE(m_search->search(QLatin1String("a a a"), searchRange, true), backwardResult);
}

void PlainTextSearchTest::testMultilineSearch_data()
{
    QTest::addColumn<QString>("pattern");
    QTest::addColumn<KTextEditor::Range>("inputRange");
    QTest::addColumn<KTextEditor::Range>("forwardResult");

    QTest::newRow("") << "a a a\na a\na a a" << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 2, 5);
    QTest::newRow("") << "a a a\na a\na a "  << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 2, 4);
    QTest::newRow("") << "a a a\na a\na a"   << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 2, 3);
    QTest::newRow("") << "a a a\na a\na"     << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 2, 1);
    QTest::newRow("") << "a a a\na a\n"      << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 2, 0);
    QTest::newRow("") << "a a a\na a"        << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 0, 1, 3);
    QTest::newRow("") <<   "a a\na a"        << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 2, 1, 3);
    QTest::newRow("") <<   "a a\na a\na a"   << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 2, 2, 3);
    QTest::newRow("") <<      "\na a\na a"   << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 5, 2, 3);
    QTest::newRow("") <<      "\na a\n"      << KTextEditor::Range(0, 0, 2, 5) << KTextEditor::Range(0, 5, 2, 0);

    QTest::newRow("") << "a a a\na a\na a a" << KTextEditor::Range(0, 0, 2, 4) << KTextEditor::Range::invalid();
    QTest::newRow("") << "a a a\na a\na a "  << KTextEditor::Range(0, 0, 2, 4) << KTextEditor::Range(0, 0, 2, 4);
    QTest::newRow("") << "a a a\na a\n"      << KTextEditor::Range(0, 0, 2, 0) << KTextEditor::Range(0, 0, 2, 0);
    QTest::newRow("") << "a a a\na a\n"      << KTextEditor::Range(0, 0, 1, 3) << KTextEditor::Range::invalid();
    QTest::newRow("") <<   "a a\n"           << KTextEditor::Range(0, 0, 1, 3) << KTextEditor::Range(0, 2, 1, 0);
    QTest::newRow("") <<    "a \n"           << KTextEditor::Range(0, 0, 1, 3) << KTextEditor::Range::invalid();
}

void PlainTextSearchTest::testMultilineSearch()
{
    QFETCH(QString, pattern);
    QFETCH(KTextEditor::Range, inputRange);
    QFETCH(KTextEditor::Range, forwardResult);

    m_doc->setText(QLatin1String("a a a\n"
                                 "a a\n"
                                 "a a a"));

    QCOMPARE(m_search->search(pattern, inputRange, false), forwardResult);
}
