/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


/**
 * @file
 * Test suite for MARKUP_PARSER
 */

#include <qa_utils/wx_utils/unit_test_utils.h>

// Code under test
#include <markup_parser.h>
#include <font/font.h>
#include <font/stroke_font.h>

/**
 * Declare the test suite
 */
BOOST_AUTO_TEST_SUITE( MarkupParser )

void nodeToString( std::unique_ptr<MARKUP::NODE>& aNode, std::string& aStringToPopulate )
{
    aStringToPopulate += " {";

    if( aNode->isOverbar() )
        aStringToPopulate += "OVER";
    if( aNode->isSubscript() )
        aStringToPopulate += "SUB";
    if( aNode->isSuperscript() )
        aStringToPopulate += "SUP";

    if( aNode->has_content() )
        aStringToPopulate += "'" + aNode->string() + "'";

    for( auto& c : aNode->children )
        nodeToString( c, aStringToPopulate );

    aStringToPopulate += "} ";
}

struct PARSE_CASE
{
    std::string Input;
    std::string ExpectedResult;
};

/**
 * Test the #Parse method.
 */
BOOST_AUTO_TEST_CASE( Parse )
{

    std::vector<PARSE_CASE> cases =
    {
        {
            "A normal string",
            " { {'A normal string'} } "
        },
        {
            "_{A subscript String}",
            " { {SUB {'A subscript String'} } } "
        },
        {
            "^{A superscript String}",
            " { {SUP {'A superscript String'} } } "
        },
        {
            "~{An overbar String}",
            " { {OVER {'An overbar String'} } } "
        },
        {
            "~{An incomplete markup",
            " { {'~{An incomplete markup'} } "
        },
        {
            "A string ~{overbar}",
            " { {'A string '}  {OVER {'overbar'} } } "
        },
        {
            "A string ~{incomplete markup",
            " { {'A string ~{incomplete markup'} } "
        },
        {
            "A string ~{overbar} ~{incomplete markup",
            " { {'A string '}  {OVER {'overbar'} }  {' ~{incomplete markup'} } "
        },
        {   "A string ~{incomplete markup ~{overbar}",
            " { {'A string ~{incomplete markup '}  {OVER {'overbar'} } } "
        }
    };

    for( auto& c : cases )
    {
        BOOST_TEST_INFO_SCOPE( c.Input );
        MARKUP::MARKUP_PARSER parser( c.Input );

        std::unique_ptr<MARKUP::NODE> rootNode = parser.Parse();
        BOOST_REQUIRE( rootNode );

        std::string result;
        nodeToString( rootNode, result );

        BOOST_CHECK_EQUAL( result, c.ExpectedResult );

        // Uncomment for testing / generating test cases:
        // printf( "%s\n", result.c_str() );
    }

}


/**
 * Verify that LinebreakText preserves multiple spaces inside overbar markup and that
 * the overbar word receives a nonzero width so line-wrapping accounts for it.
 *
 * Regression test for https://gitlab.com/kicad/code/kicad/-/issues/22913
 */
BOOST_AUTO_TEST_CASE( OverbarMultipleSpacesWidth )
{
    KIFONT::FONT* font = KIFONT::STROKE_FONT::LoadFont( wxEmptyString );

    BOOST_REQUIRE( font );

    VECTOR2I glyphSize( 1000, 1000 );

    // Measure the width of a single space for reference
    int spaceWidth = font->GetTextAsGlyphs( nullptr, nullptr, wxS( " " ), glyphSize,
                                            VECTOR2I(), ANGLE_0, false, VECTOR2I(), 0 ).x;

    BOOST_REQUIRE( spaceWidth > 0 );

    // Measure the width of 5 spaces
    int fiveSpaceWidth = font->GetTextAsGlyphs( nullptr, nullptr, wxS( "     " ), glyphSize,
                                                VECTOR2I(), ANGLE_0, false, VECTOR2I(), 0 ).x;

    BOOST_CHECK_GT( fiveSpaceWidth, spaceWidth );

    // Verify that LinebreakText preserves overbar with multiple spaces
    struct LINEBREAK_CASE
    {
        wxString Input;
        wxString Expected;
    };

    int wideColumn = 100000;

    std::vector<LINEBREAK_CASE> cases =
    {
        { wxS( "~{     }" ),         wxS( "~{     }" ) },
        { wxS( "A ~{     }" ),       wxS( "A ~{     }" ) },
        { wxS( "A ~{  B  }" ),       wxS( "A ~{  B  }" ) },
        { wxS( "~{     } end" ),     wxS( "~{     } end" ) },
        { wxS( "/~{     }" ),        wxS( "/~{     }" ) },
        { wxS( "_{     }" ),         wxS( "_{     }" ) },
        { wxS( "^{     }" ),         wxS( "^{     }" ) },
    };

    for( auto& c : cases )
    {
        BOOST_TEST_INFO_SCOPE( c.Input );

        wxString text = c.Input;
        font->LinebreakText( text, wideColumn, glyphSize, 0, false, false );
        BOOST_CHECK_EQUAL( text, c.Expected );
    }
}


BOOST_AUTO_TEST_SUITE_END()