/************************************************************************
 **
 **  @file   vpatternpiecedata.cpp
 **  @author Bojan Kverh
 **  @date   July 19, 2016
 **
 **  @brief
 **  @copyright
 **  This source code is part of the Valentine project, a pattern making
 **  program, whose allow create and modeling patterns of clothing.
 **  Copyright (C) 2013-2015 Valentina project
 **  <https://bitbucket.org/dismine/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 <QDate>
#include <QFileInfo>
#include <QFontMetrics>
#include <QLatin1String>
#include <QRegularExpression>
#include <QApplication>
#include <QDebug>

#include "../ifc/xml/vabstractpattern.h"
#include "../vpatterndb/vpatternpiecedata.h"
#include "../vmisc/vabstractapplication.h"
#include "../vmisc/vmath.h"
#include "vtextmanager.h"

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief TextLine::TextLine default constructor
 */
TextLine::TextLine()
    : m_qsText(),
      m_iFontSize(MIN_FONT_SIZE),
      m_eFontWeight(QFont::Normal),
      m_eStyle(QFont::StyleNormal),
      m_eAlign(Qt::AlignCenter)
{}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::VTextManager constructor
 */
VTextManager::VTextManager()
     : m_font(), m_liLines()
{}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::~VTextManager destructor
 */
VTextManager::~VTextManager()
{}

//---------------------------------------------------------------------------------------------------------------------
VTextManager::VTextManager(const VTextManager &text)
    : m_font(text.GetFont()), m_liLines(text.GetAllSourceLines())
{}

//---------------------------------------------------------------------------------------------------------------------
VTextManager &VTextManager::operator=(const VTextManager &text)
{
    if ( &text == this )
    {
        return *this;
    }
    m_font = text.GetFont();
    m_liLines = text.GetAllSourceLines();
    return *this;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief GetSpacing returns the vertical spacing between the lines
 * @return spacing
 */
int VTextManager::GetSpacing() const
{
    return 0;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief SetFont set the text base font
 * @param font text base font
 */
void VTextManager::SetFont(const QFont& font)
{
    m_font = font;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief GetFont returns the text base font
 * @return text base font
 */
const QFont& VTextManager::GetFont() const
{
    return m_font;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief SetFontSize sets the font size
 * @param iFS font size in pixels
 */
void VTextManager::SetFontSize(int iFS)
{
    iFS < MIN_FONT_SIZE ? m_font.setPixelSize(MIN_FONT_SIZE) : m_font.setPixelSize(iFS);
}

//---------------------------------------------------------------------------------------------------------------------
QList<TextLine> VTextManager::GetAllSourceLines() const
{
    return m_liLines;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief AddSourceLine add new text line to the list
 * @param tl text line object to be added
 */
void VTextManager::AddSourceLine(const TextLine& tl)
{
    m_liLines << tl;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief ClearSourceLines deletes the list of texts
 */
void VTextManager::ClearSourceLines()
{
    m_liLines.clear();
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::GetSourceLinesCount returns the number of input text lines
 * @return number of text lines that were added to the list by calling AddLine
 */
int VTextManager::GetSourceLinesCount() const
{
    return m_liLines.count();
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::GetSourceLine returns the reference to i-th text line
 * @param i index of the requested line
 * @return reference to the requested TextLine object
 */
const TextLine& VTextManager::GetSourceLine(int i) const
{
    Q_ASSERT(i >= 0);
    Q_ASSERT(i < m_liLines.count());
    return m_liLines.at(i);
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::FitFontSize sets the font size just big enough, so that the text fits into rectangle of
 * size (fW, fH)
 * @param fW rectangle width
 * @param fH rectangle height
 */
void VTextManager::FitFontSize(qreal fW, qreal fH)
{
    int iFS = 0;
    if (GetSourceLinesCount() > 0)
    {//division by zero
        iFS = 3*qFloor(fH/GetSourceLinesCount())/4;
    }

    if (iFS < MIN_FONT_SIZE)
    {
        iFS = MIN_FONT_SIZE;
    }

    // get ratio between char width and height

    int iMaxLen = 0;
    TextLine maxLine;
    QFont fnt;
    for (int i = 0; i < GetSourceLinesCount(); ++i)
    {
        const TextLine& tl = GetSourceLine(i);
        fnt = m_font;
        fnt.setPixelSize(iFS + tl.m_iFontSize);
        fnt.setWeight(tl.m_eFontWeight);
        fnt.setStyle(tl.m_eStyle);
        QFontMetrics fm(fnt);
        const int iTW = fm.width(tl.m_qsText);
        if (iTW > iMaxLen)
        {
            iMaxLen = iTW;
            maxLine = tl;
        }
    }
    if (iMaxLen > fW)
    {
        QFont fnt = m_font;
        fnt.setWeight(maxLine.m_eFontWeight);
        fnt.setStyle(maxLine.m_eStyle);

        int lineLength = 0;
        do
        {
            --iFS;
            fnt.setPixelSize(iFS + maxLine.m_iFontSize);
            QFontMetrics fm(fnt);
            lineLength = fm.width(maxLine.m_qsText);
        }
        while (lineLength > fW && iFS > MIN_FONT_SIZE);
    }
    SetFontSize(iFS);
    qDebug() << "Font size" << GetSourceLinesCount() << iFS;
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::Update updates the text lines with detail data
 * @param qsName detail name
 * @param data reference to the detail data
 */
void VTextManager::Update(const QString& qsName, const VPatternPieceData& data)
{
    ClearSourceLines();
    TextLine tl;
    // all text must be centered and normal style!
    tl.m_eAlign = Qt::AlignCenter;
    tl.m_eStyle = QFont::StyleNormal;

    // letter
    tl.m_qsText = data.GetLetter();
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::Bold;
        tl.m_iFontSize = 6;
        AddSourceLine(tl);
    }
    // name
    tl.m_qsText = qsName;
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::DemiBold;
        tl.m_iFontSize = 2;
        AddSourceLine(tl);
    }
    // MCP
    QStringList qslMaterials;
    qslMaterials << QApplication::translate("Detail", "Fabric", 0)
                 << QApplication::translate("Detail", "Lining", 0)
                 << QApplication::translate("Detail", "Interfacing", 0)
                 << QApplication::translate("Detail", "Interlining", 0);
    QString qsText = QLatin1String("%1, ") + tr("cut") + QLatin1String(" %2%3");
    QStringList qslPlace;
    qslPlace << "" << QLatin1String(" ") + tr("on fold");
    tl.m_eFontWeight = QFont::Normal;
    tl.m_iFontSize = 0;
    for (int i = 0; i < data.GetMCPCount(); ++i)
    {
        MaterialCutPlacement mcp = data.GetMCP(i);
        if (mcp.m_iCutNumber > 0)//Not gonna happen because min value is 1 now, but decided to left
        {
            QString qsMat;
            if (mcp.m_eMaterial == MaterialType::mtUserDefined)
            {
                qsMat = mcp.m_qsMaterialUserDef;
            }
            else
            {
                qsMat = qslMaterials[int(mcp.m_eMaterial)];
            }
            tl.m_qsText = qsText.arg(qsMat).arg(mcp.m_iCutNumber).
                    arg(qslPlace[int(mcp.m_ePlacement)]);
            AddSourceLine(tl);
        }
    }
}

//---------------------------------------------------------------------------------------------------------------------
/**
 * @brief VTextManager::Update updates the text lines with pattern info
 * @param pDoc pointer to the abstract pattern object
 */
void VTextManager::Update(const VAbstractPattern *pDoc, qreal dSize, qreal dHeight)
{
    ClearSourceLines();
    TextLine tl;
    // all information must be centered
    tl.m_eAlign = Qt::AlignCenter;

    // Company name
    tl.m_qsText = pDoc->GetCompanyName();
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::DemiBold;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 4;
        AddSourceLine(tl);
    }
    // Pattern name
    tl.m_qsText = pDoc->GetPatternName();
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 2;
        AddSourceLine(tl);
    }
    // Pattern number
    tl.m_qsText = pDoc->GetPatternNumber();
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 0;
        AddSourceLine(tl);
    }
    // Customer name
    tl.m_qsText = pDoc->GetCustomerName();
    if (tl.m_qsText.isEmpty() == false)
    {
        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleItalic;
        tl.m_iFontSize = 0;
        AddSourceLine(tl);
    }
    // Size
    tl.m_qsText = pDoc->GetPatternSize();
    if (tl.m_qsText.isEmpty() == false)
    {
        // Such describing placeholders will help avoid mistake of localization.
        // Translators very often remove '%'.
        QString placeholder = QLatin1String("%") + qApp->TrVars()->PlaceholderToUser(pl_size) + QLatin1String("%");
        tl.m_qsText.replace(placeholder, QString::number(dSize));

        placeholder = QLatin1String("%") + qApp->TrVars()->PlaceholderToUser(pl_height) + QLatin1String("%");
        tl.m_qsText.replace(placeholder, QString::number(dHeight));

        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 0;
        AddSourceLine(tl);
    }
    // Measurements
    tl.m_qsText = QFileInfo(pDoc->MPath()).fileName();
    if (tl.m_qsText.isEmpty() == false && pDoc->IsMeasurementsVisible() == true)
    {
        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 0;
        AddSourceLine(tl);
    }
    // Date
    QDate date;
    if (pDoc->IsDateVisible() == true)
    {
        date = QDate::currentDate();
    }
    if (date.isValid() == true)
    {
        tl.m_qsText = date.toString("dd MMMM yyyy");
        tl.m_eFontWeight = QFont::Normal;
        tl.m_eStyle = QFont::StyleNormal;
        tl.m_iFontSize = 0;
        AddSourceLine(tl);
    }
}