#include "nmReservoirParameterField.h"

#include "iParaItemCtrl.h"
#include "iParameter.h"
#include "iSysParaHelper.h"
#include "mModuleDefines.h"

#include <QComboBox>
#include <QCoreApplication>
#include <QGridLayout>
#include <QLabel>
#include <QLineEdit>
#include <QSizePolicy>

namespace
{

/* Qt 4.8的lupdate需要显式标记间接翻译字符串。 */
static const char* const s_pFieldTranslationMarkers[] =
{
    QT_TRANSLATE_NOOP("nmReservoirParameterField", "The parameter layout is unavailable."),
    QT_TRANSLATE_NOOP("nmReservoirParameterField", "Parameter definition not found: %1"),
    QT_TRANSLATE_NOOP("nmReservoirParameterField", "Failed to bind the unit for parameter: %1")
};

/** @brief 返回轻量字段类使用的翻译文字。 */
QString fieldText(const char* pText)
{
    Q_UNUSED(s_pFieldTranslationMarkers);
    return QCoreApplication::translate(
            "nmReservoirParameterField", pText);
}

}

nmReservoirParameterField::nmReservoirParameterField(
        const nmReservoirParameterFieldInfo& oFieldInfo,
        nmIReservoirParameterUnitService* pUnitService,
        QObject* pParent)
    : QObject(pParent),
      m_oFieldInfo(oFieldInfo),
      m_pUnitService(pUnitService),
      m_pParameter(nullptr),
      m_pLabel(nullptr),
      m_pLineEdit(nullptr),
      m_pValueComboBox(nullptr),
      m_pUnitComboBox(nullptr),
      m_pUnitLabel(nullptr),
      m_bVisible(true),
      m_bUpdating(false)
{
}

nmReservoirParameterField::~nmReservoirParameterField()
{
    m_pUnitService = nullptr;
    m_pParameter = nullptr;
    m_pLabel = nullptr;
    m_pLineEdit = nullptr;
    m_pValueComboBox = nullptr;
    m_pUnitComboBox = nullptr;
    m_pUnitLabel = nullptr;
}

bool nmReservoirParameterField::initialize(QGridLayout* pLayout,
                                           int nRow,
                                           int nColumnOffset,
                                           QString& sError)
{
    if (pLayout == nullptr)
    {
        sError = fieldText("The parameter layout is unavailable.");
        return false;
    }

    // 第一步：枚举字段不依赖XML数值定义，直接创建稳定code下拉框。
    if (isEnum())
    {
        createEnumEditor(pLayout, nRow, nColumnOffset);
        sError.clear();
        return true;
    }

    // 第二步：数值字段必须取得NM系列的基础参数定义。
    m_pParameter = _paraHelper->getPara(
            m_oFieldInfo.m_sBaseParameterId, s_Nm_Serie);
    if (m_pParameter == nullptr)
    {
        sError = fieldText("Parameter definition not found: %1")
                .arg(m_oFieldInfo.m_sBaseParameterId);
        return false;
    }

    // 第三步：创建原型中的标签、输入框和单位列，不增加字段外框。
    return createNumericEditor(pLayout, nRow, nColumnOffset, sError);
}

QString nmReservoirParameterField::parameterId() const
{
    return m_oFieldInfo.m_sParameterId;
}

QString nmReservoirParameterField::baseParameterId() const
{
    return m_oFieldInfo.m_sBaseParameterId;
}

bool nmReservoirParameterField::isEnum() const
{
    return m_oFieldInfo.m_eEditorType == NM_RESERVOIR_EDITOR_ENUM;
}

void nmReservoirParameterField::setValueRightAligned(bool bRightAligned)
{
    if (m_pLineEdit != nullptr)
    {
        m_pLineEdit->setAlignment(
                (bRightAligned ? Qt::AlignRight : Qt::AlignLeft) |
                Qt::AlignVCenter);
    }
}

int nmReservoirParameterField::editorMinimumWidth()
{
    return 140;
}

int nmReservoirParameterField::unitMinimumWidth()
{
    return 86;
}

int nmReservoirParameterField::editorHeight()
{
    return 25;
}

bool nmReservoirParameterField::createNumericEditor(
        QGridLayout* pLayout,
        int nRow,
        int nColumnOffset,
        QString& sError)
{
    QWidget* pParentWidget = pLayout->parentWidget();
    m_pLabel = new QLabel(m_pParameter->m_sAlias, pParentWidget);
    m_pLabel->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    m_pLabel->setWordWrap(false);
    m_pLabel->setSizePolicy(QSizePolicy::Preferred,
                            QSizePolicy::Fixed);

    m_pLineEdit = new QLineEdit(pParentWidget);
    m_pLineEdit->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    m_pLineEdit->setFixedHeight(editorHeight());
    m_pLineEdit->setMinimumWidth(editorMinimumWidth());
    m_pLineEdit->setSizePolicy(QSizePolicy::Expanding,
                               QSizePolicy::Fixed);

    pLayout->addWidget(m_pLabel, nRow, nColumnOffset);
    pLayout->addWidget(m_pLineEdit, nRow, nColumnOffset + 1);

    // 有单位参数直接注册到主对话框绑定器；字段只按控件指针读写，
    // 因此多口井共用同一基础参数ID时也不会发生串值。
    if (m_oFieldInfo.m_bUnitEnabled &&
            !m_pParameter->m_sUnit.isEmpty())
    {
        m_pUnitComboBox = new QComboBox(pParentWidget);
        m_pUnitComboBox->setFixedHeight(editorHeight());
        m_pUnitComboBox->setMinimumWidth(unitMinimumWidth());
        m_pUnitComboBox->setSizePolicy(QSizePolicy::Expanding,
                                       QSizePolicy::Fixed);
        pLayout->addWidget(m_pUnitComboBox, nRow, nColumnOffset + 2);
        if (m_pUnitService == nullptr ||
                !m_pUnitService->bindUnitField(
                    m_pLineEdit,
                    m_pUnitComboBox,
                    m_oFieldInfo.m_sBaseParameterId))
        {
            sError = fieldText(
                    "Failed to bind the unit for parameter: %1")
                    .arg(m_oFieldInfo.m_sBaseParameterId);
            return false;
        }
    }
    else
    {
        // 无单位参数保留空列用于对齐，不显示额外的单位说明文字。
        m_pUnitLabel = new QLabel(pParentWidget);
        m_pUnitLabel->setMinimumWidth(unitMinimumWidth());
        m_pUnitLabel->setSizePolicy(QSizePolicy::Expanding,
                                    QSizePolicy::Fixed);
        pLayout->addWidget(m_pUnitLabel, nRow, nColumnOffset + 2);
    }

    updateValidationAppearance(true);
    sError.clear();
    return true;
}

void nmReservoirParameterField::createEnumEditor(QGridLayout* pLayout,
                                                 int nRow,
                                                 int nColumnOffset)
{
    QWidget* pParentWidget = pLayout->parentWidget();
    m_pLabel = new QLabel(m_oFieldInfo.m_sLabel, pParentWidget);
    m_pLabel->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    m_pLabel->setWordWrap(false);
    m_pLabel->setSizePolicy(QSizePolicy::Preferred,
                            QSizePolicy::Fixed);

    m_pValueComboBox = new QComboBox(pParentWidget);
    m_pValueComboBox->setFixedHeight(editorHeight());
    m_pValueComboBox->setMinimumWidth(editorMinimumWidth());
    m_pValueComboBox->setSizePolicy(QSizePolicy::Expanding,
                                    QSizePolicy::Fixed);
    for (int nIndex = 0;
         nIndex < m_oFieldInfo.m_listOptions.size();
         ++nIndex)
    {
        const nmReservoirEnumOption& oOption =
                m_oFieldInfo.m_listOptions[nIndex];
        m_pValueComboBox->addItem(oOption.m_sText, oOption.m_sCode);
    }

    // 枚举参数没有单位，空白单位列仅用于保持各行编辑器对齐。
    m_pUnitLabel = new QLabel(pParentWidget);
    m_pUnitLabel->setMinimumWidth(unitMinimumWidth());
    m_pUnitLabel->setSizePolicy(QSizePolicy::Expanding,
                                QSizePolicy::Fixed);

    pLayout->addWidget(m_pLabel, nRow, nColumnOffset);
    pLayout->addWidget(m_pValueComboBox, nRow, nColumnOffset + 1);
    pLayout->addWidget(m_pUnitLabel, nRow, nColumnOffset + 2);
}

void nmReservoirParameterField::setBaseValue(const QVariant& oValue)
{
    if (m_pLineEdit == nullptr || !oValue.isValid())
    {
        return;
    }

    m_bUpdating = true;
    double dValue = oValue.toDouble();
    if (m_pUnitComboBox != nullptr && m_pUnitService != nullptr)
    {
        m_pUnitService->setUnitBaseValue(m_pLineEdit, dValue);
    }
    else
    {
        m_pLineEdit->setText(formatBaseValue(dValue));
    }
    m_bUpdating = false;
    validate();
}

QVariant nmReservoirParameterField::baseValue(bool& bValid)
{
    bValid = validate();
    if (!bValid || m_pLineEdit == nullptr)
    {
        return QVariant();
    }

    if (m_pUnitComboBox != nullptr && m_pUnitService != nullptr)
    {
        return QVariant(m_pUnitService->unitBaseValue(m_pLineEdit));
    }

    bool bNumberOk = false;
    double dValue = m_pLineEdit->text().trimmed().toDouble(&bNumberOk);
    return bNumberOk ? QVariant(dValue) : QVariant();
}

void nmReservoirParameterField::setEnumCode(const QString& sCode)
{
    if (m_pValueComboBox == nullptr)
    {
        return;
    }
    int nIndex = m_pValueComboBox->findData(sCode);
    m_bUpdating = true;
    m_pValueComboBox->setCurrentIndex(nIndex >= 0 ? nIndex : 0);
    m_bUpdating = false;
}

QString nmReservoirParameterField::enumCode() const
{
    if (m_pValueComboBox == nullptr ||
            m_pValueComboBox->currentIndex() < 0)
    {
        return QString();
    }
    return m_pValueComboBox->itemData(
            m_pValueComboBox->currentIndex()).toString();
}

bool nmReservoirParameterField::validate()
{
    if (!m_bVisible || isEnum())
    {
        return true;
    }
    if (m_pLineEdit == nullptr || m_pParameter == nullptr)
    {
        return false;
    }

    bool bValid = false;
    if (m_pUnitComboBox != nullptr && m_pUnitService != nullptr)
    {
        bValid = m_pUnitService->isUnitInputValid(m_pLineEdit);
    }
    else
    {
        bool bNumberOk = false;
        double dValue = m_pLineEdit->text().trimmed()
                .toDouble(&bNumberOk);
        bValid = bNumberOk && dValue == dValue &&
                dValue >= m_pParameter->m_dMin &&
                dValue <= m_pParameter->m_dMax;
        if (bValid &&
                m_oFieldInfo.m_eEditorType == NM_RESERVOIR_EDITOR_INTEGER)
        {
            bValid = dValue == static_cast<int>(dValue);
        }
    }
    updateValidationAppearance(bValid);
    return bValid;
}

void nmReservoirParameterField::setFieldVisible(bool bVisible)
{
    m_bVisible = bVisible;
    if (m_pLabel != nullptr)
    {
        m_pLabel->setVisible(bVisible);
    }
    if (m_pLineEdit != nullptr)
    {
        m_pLineEdit->setVisible(bVisible);
    }
    if (m_pValueComboBox != nullptr)
    {
        m_pValueComboBox->setVisible(bVisible);
    }
    if (m_pUnitComboBox != nullptr)
    {
        m_pUnitComboBox->setVisible(bVisible);
    }
    if (m_pUnitLabel != nullptr)
    {
        m_pUnitLabel->setVisible(bVisible);
    }
}

bool nmReservoirParameterField::isFieldVisible() const
{
    return m_bVisible;
}

QLineEdit* nmReservoirParameterField::valueEditor() const
{
    return m_pLineEdit;
}

QComboBox* nmReservoirParameterField::enumEditor() const
{
    return m_pValueComboBox;
}

QString nmReservoirParameterField::formatBaseValue(double dValue) const
{
    if (m_pParameter == nullptr)
    {
        return QString::number(dValue, 'g', 15);
    }
    if (m_oFieldInfo.m_eEditorType == NM_RESERVOIR_EDITOR_INTEGER ||
            m_pParameter->m_nDigit == 0)
    {
        return QString::number(dValue, 'f', 0);
    }
    if (m_pParameter->m_bScientific)
    {
        return QString::number(dValue, 'e', m_pParameter->m_nDigit);
    }

    QString sValue = QString::number(
            dValue, 'f', m_pParameter->m_nDigit);
    while (sValue.contains('.') && sValue.endsWith('0'))
    {
        sValue.chop(1);
    }
    if (sValue.endsWith('.'))
    {
        sValue.chop(1);
    }
    return sValue;
}

void nmReservoirParameterField::updateValidationAppearance(bool bValid)
{
    Q_UNUSED(bValid);
    if (m_pLineEdit == nullptr || m_pParameter == nullptr)
    {
        return;
    }

    QString sCurrentUnit;
    iUnitGroup* pUnitGroup = nullptr;
    if (m_pUnitComboBox != nullptr && m_pUnitService != nullptr)
    {
        sCurrentUnit = m_pUnitService->currentUnit(m_pLineEdit);
        pUnitGroup = m_pUnitService->unitGroup(m_pLineEdit);
    }
    QString sRange = iParaItemCtrl::getScaleStrOf(
            m_pParameter, sCurrentUnit, pUnitGroup);
    QString sHelp = m_pParameter->m_sDesc;
    if (!sRange.isEmpty())
    {
        if (!sHelp.isEmpty())
        {
            sHelp += "\n";
        }
        sHelp += sRange;
    }
    m_pLineEdit->setToolTip(sHelp);
    m_pLineEdit->setWhatsThis(sHelp);
    if (m_pLabel != nullptr)
    {
        m_pLabel->setWhatsThis(sHelp);
    }
}