/************************************************************************
 **
 **  @file   vlayoutconverter.cpp
 **  @author Roman Telezhynskyi <dismine(at)gmail.com>
 **  @date   23 4, 2020
 **
 **  @brief
 **  @copyright
 **  This source code is part of the Valentina project, a pattern making
 **  program, whose allow create and modeling patterns of clothing.
 **  Copyright (C) 2020 Valentina project
 **  <https://gitlab.com/smart-pattern/valentina> All Rights Reserved.
 **
 **  Valentina 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.
 **
 **  Valentina 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 Valentina.  If not, see <http://www.gnu.org/licenses/>.
 **
 *************************************************************************/
#include "vlayoutconverter.h"
#include "../exception/vexception.h"
#include "../ifcdef.h"
#include "../vlayout/vlayoutpoint.h"

/*
 * Version rules:
 * 1. Version have three parts "major.minor.patch";
 * 2. major part only for stable releases;
 * 3. minor - 10 or more patch changes, or one big change;
 * 4. patch - little change.
 */

const QString VLayoutConverter::LayoutMinVerStr = QStringLiteral("0.1.0");
const QString VLayoutConverter::LayoutMaxVerStr = QStringLiteral("0.1.3");
const QString VLayoutConverter::CurrentSchema   = QStringLiteral("://schema/layout/v0.1.3.xsd");

//VLayoutConverter::LayoutMinVer; // <== DON'T FORGET TO UPDATE TOO!!!!
//VLayoutConverter::LayoutMaxVer; // <== DON'T FORGET TO UPDATE TOO!!!!

namespace
{
// The list of all string we use for conversion
// Better to use global variables because repeating QStringLiteral blows up code size
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strSeamLineTag, (QLatin1String("seamLine"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strSeamAllowanceTag, (QLatin1String("seamAllowance"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strInternalPathTag, (QLatin1String("internalPath"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strMarkerTag, (QLatin1String("marker"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strPointTag, (QLatin1String("point"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strPieceTag, (QLatin1String("piece"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrX, (QLatin1String("x"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrY, (QLatin1String("y"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrTurnPoint, (QLatin1String("turnPoint"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrCurvePoint, (QLatin1String("curvePoint"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrId, (QLatin1String("id"))) // NOLINT
Q_GLOBAL_STATIC_WITH_ARGS(const QString, strAttrUId, (QLatin1String("uid"))) // NOLINT

//const QChar groupSep        = QLatin1Char(';');
const QChar coordintatesSep = QLatin1Char(',');
const QChar pointsSep       = QLatin1Char(' ');
//const QChar itemsSep        = QLatin1Char('*');

//---------------------------------------------------------------------------------------------------------------------
auto StringV0_1_2ToPoint(const QString &point) -> QPointF
{
    QStringList coordinates = point.split(coordintatesSep);
    if (coordinates.count() == 2)
    {
        return {coordinates.at(0).toDouble(), coordinates.at(1).toDouble()};
    }

    return {};
}

//---------------------------------------------------------------------------------------------------------------------
auto StringV0_1_2ToPath(const QString &path) -> QVector<QPointF>
{
    QVector<QPointF> p;
    QStringList points = path.split(pointsSep);
    p.reserve(points.size());
    for (const auto& point : points)
    {
        p.append(StringV0_1_2ToPoint(point));
    }

    return p;
}
}  // namespace

//---------------------------------------------------------------------------------------------------------------------
VLayoutConverter::VLayoutConverter(const QString &fileName)
    : VAbstractConverter(fileName)
{
    m_ver = GetFormatVersion(VLayoutConverter::GetFormatVersionStr());
    ValidateInputFile(CurrentSchema);
}

//---------------------------------------------------------------------------------------------------------------------
auto VLayoutConverter::GetFormatVersionStr() const -> QString
{
    QDomNode root = documentElement();
    if (not root.isNull() && root.isElement())
    {
        const QDomElement layoutElement = root.toElement();
        if (not layoutElement.isNull())
        {
            return GetParametrString(layoutElement, AttrLayoutVersion, QStringLiteral("0.0.0"));
        }
    }
    return QStringLiteral("0.0.0");
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::SetVersion(const QString &version)
{
    ValidateVersion(version);

    QDomElement root = documentElement().toElement();
    if (root.isElement() && root.hasAttribute(AttrLayoutVersion))
    {
        root.setAttribute(AttrLayoutVersion, version);
    }
    else
    {
        throw VException(tr("Could not change version."));
    }
}

//---------------------------------------------------------------------------------------------------------------------
auto VLayoutConverter::XSDSchema(unsigned ver) const -> QString
{
    QHash <unsigned, QString> schemas =
    {
        std::make_pair(FormatVersion(0, 1, 0), QStringLiteral("://schema/layout/v0.1.0.xsd")),
        std::make_pair(FormatVersion(0, 1, 1), QStringLiteral("://schema/layout/v0.1.1.xsd")),
        std::make_pair(FormatVersion(0, 1, 2), QStringLiteral("://schema/layout/v0.1.2.xsd")),
        std::make_pair(FormatVersion(0, 1, 3), CurrentSchema),
    };

    if (schemas.contains(ver))
    {
        return schemas.value(ver);
    }

    InvalidVersion(ver);
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::ApplyPatches()
{
    switch (m_ver)
    {
        case (FormatVersion(0, 1, 0)):
        case (FormatVersion(0, 1, 1)):
        case (FormatVersion(0, 1, 2)):
            ToV0_1_3();
            ValidateXML(XSDSchema(FormatVersion(0, 1, 3)));
            Q_FALLTHROUGH();
        case (FormatVersion(0, 1, 3)):
            break;
        default:
            InvalidVersion(m_ver);
    }
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::DowngradeToCurrentMaxVersion()
{
    SetVersion(LayoutMaxVerStr);
    Save();
}

//---------------------------------------------------------------------------------------------------------------------
auto VLayoutConverter::IsReadOnly() const -> bool
{
    return false;
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::ConvertPiecesToV0_1_3()
{
    // TODO. Delete if minimal supported version is 0.1.3
    Q_STATIC_ASSERT_X(VLayoutConverter::LayoutMinVer < FormatVersion(0, 1, 3),
                      "Time to refactor the code.");

    const QStringList types
    {
        *strSeamLineTag,
        *strSeamAllowanceTag,
        *strInternalPathTag
    };

    for (const auto &tagType : types)
    {
        QDomNodeList tags = elementsByTagName(tagType);
        for (int i=0; i < tags.size(); ++i)
        {
            QDomElement node = tags.at(i).toElement();
            ConvertPathToV0_1_3(node);
        }
    }

    QDomNodeList tags = elementsByTagName(*strMarkerTag);
    for (int i=0; i < tags.size(); ++i)
    {
        QDomElement node = tags.at(i).toElement();
        RemoveAllChildren(node);
    }

    QDomNodeList pieceTags = elementsByTagName(*strPieceTag);
    for (int i=0; i < pieceTags.size(); ++i)
    {
        QDomElement node = pieceTags.at(i).toElement();
        if (node.isElement() && node.hasAttribute(*strAttrId))
        {
            node.setAttribute(*strAttrUId, node.attribute(*strAttrId));
            node.removeAttribute(*strAttrId);
        }
    }
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::ConvertPathToV0_1_3(QDomElement &node)
{
    QString oldPath = node.text();
    if (oldPath.isEmpty())
    {
        return;
    }

    RemoveAllChildren(node);
    QVector<VLayoutPoint> path;
    CastTo(StringV0_1_2ToPath(oldPath), path);

    for (auto &point : path)
    {
        QDomElement pointTag = createElement(*strPointTag);
        SetAttribute(pointTag, *strAttrX, point.x());
        SetAttribute(pointTag, *strAttrY, point.y());

        if (point.TurnPoint())
        {
            SetAttribute(pointTag, *strAttrTurnPoint, point.TurnPoint());
        }

        if (point.CurvePoint())
        {
            SetAttribute(pointTag, *strAttrCurvePoint, point.CurvePoint());
        }

        node.appendChild(pointTag);
    }
}

//---------------------------------------------------------------------------------------------------------------------
void VLayoutConverter::ToV0_1_3()
{
    // TODO. Delete if minimal supported version is 0.1.3
    Q_STATIC_ASSERT_X(VLayoutConverter::LayoutMinVer < FormatVersion(0, 1, 3),
                      "Time to refactor the code.");

    ConvertPiecesToV0_1_3();
    SetVersion(QStringLiteral("0.1.3"));
    Save();
}