/**
 * @file PaiListDialog.cpp
 * @brief PAI系统默认列表对话框
 * @date 2014-11-25
 */
#include <QListView>
#include <QStringListModel>

#include "PaiListDialog.h"
#include "PaiPushButton.h"
#include "PaiSearchLineEdit.h"
#include "PaiListItemDelegate.h"

using namespace pai::gui;

PaiListDialog::PaiListDialog(QWidget *pParent) :
    PaiDialog(pParent)
{
    setWindowTitle(tr("π-Frame"));
    // 搜索控件
    m_pSearchLineEdit = new PaiSearchLineEdit();
    m_pSearchLineEdit->setMaximumHeight(22);
    m_pSearchLineEdit->setMinimumHeight(22);
    // 内容列表
    m_pListWgt = new QListView(this);
    m_pListWgt->setStyleSheet("QListView::item:hover{\
               background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,\
               stop: 0 #F8FCFE, stop: 1 #E8F4FC);\
               }");
    m_pListWgt->setItemDelegate(new PaiListItemDelegate(m_pListWgt));
    // 设置数据模型
    QStringListModel *pModel = new QStringListModel(m_pListWgt);
    m_pListWgt->setModel(pModel);
    // ok按钮
    m_pOkPBtn = new PaiPushButton(tr("OK"), this);
    m_pOkPBtn->setEnabled(false);
    // cancel按钮
    m_pCancelPBtn = new PaiPushButton(tr("Cancel"), this);

    QHBoxLayout *pEditLayout = new QHBoxLayout();
    pEditLayout->addSpacing(3);
    pEditLayout->addWidget(m_pSearchLineEdit);
    pEditLayout->addSpacing(65);

    QHBoxLayout *pPBtnHLayout = new QHBoxLayout;
    pPBtnHLayout->addStretch();
    pPBtnHLayout->setContentsMargins(5, 5, 5, 5);
    pPBtnHLayout->setSpacing(10);
    pPBtnHLayout->addWidget(m_pOkPBtn);
    pPBtnHLayout->addWidget(m_pCancelPBtn);

    QVBoxLayout *pLstWgtVLayout = new QVBoxLayout();
    pLstWgtVLayout->setSpacing(0);
    pLstWgtVLayout->setContentsMargins(0,0, 0, 0);
    pLstWgtVLayout->addSpacing(3);
    pLstWgtVLayout->addLayout(pEditLayout);
    pLstWgtVLayout->addSpacing(3);
    pLstWgtVLayout->addWidget(m_pListWgt);
    pLstWgtVLayout->addLayout(pPBtnHLayout);
    setLayout(pLstWgtVLayout);

    m_pListWgt->setEditTriggers(QAbstractItemView::NoEditTriggers);
    m_pListWgt->setSelectionBehavior(QAbstractItemView::SelectRows);

    connect(m_pOkPBtn, SIGNAL(clicked()), this, SLOT(OkButtonClicked()));
    connect(m_pCancelPBtn, SIGNAL(clicked()), this, SLOT(close()));
    connect(m_pListWgt, SIGNAL(doubleClicked (const QModelIndex &)), this, SLOT(ItemDoubleClicked(const QModelIndex &)));
    connect(m_pSearchLineEdit, SIGNAL(EditingStoped(const QString&)), this, SLOT(OnSearchData(const QString&)));
    connect(m_pListWgt->selectionModel(), SIGNAL(currentRowChanged(const QModelIndex &, const QModelIndex &)),
            this, SLOT(EnableOkButton(const QModelIndex &, const QModelIndex &)));
}

PaiListDialog::~PaiListDialog()
{

}

void PaiListDialog::EnableOkButton(const QModelIndex & current, const QModelIndex & previous)
{
    m_pOkPBtn->setEnabled(previous.isValid() && current.isValid());
}

void PaiListDialog::ItemDoubleClicked(const QModelIndex & index)
{
    if(index.isValid())
    {
        emit SelectedAccepted(index.data().toString());
        close();
    }
}

void PaiListDialog::SetTextList(const QStringList & textList)
{
    if(m_pListWgt && m_pListWgt->model())
    {
        QStringListModel *pModel = dynamic_cast<QStringListModel *>(m_pListWgt->model());
        if(pModel)
        {
            pModel->removeRows(0,pModel->rowCount());
            pModel->setStringList(textList);
        }
    }
}

bool PaiListDialog::Filter(const QString & keyword, int row)
{
    bool pass = false;

    if(m_pListWgt && m_pListWgt->model())
    {
        if(keyword.isEmpty())
        {
            pass = true;
        }
        else if(keyword.contains('*') || keyword.contains('?'))
        {
            QRegExp rx(keyword, Qt::CaseInsensitive, QRegExp::Wildcard);
            QModelIndex index = m_pListWgt->model()->index(row,0);
            if(rx.exactMatch(index.data().toString()))
            {
                pass = true;
            }
        }
        else
        {
            QModelIndex index = m_pListWgt->model()->index(row,0);
            if(index.data().toString().contains(keyword, Qt::CaseInsensitive))
            {
                pass = true;
            }
        }
    }

    return pass;
}

void PaiListDialog::OnSearchData(const QString & keyword)
{
    if(m_pListWgt && m_pListWgt->model())
    {
        for(int rowIndex = 0; rowIndex < m_pListWgt->model()->rowCount(); ++rowIndex)
        {
            bool pass = Filter(keyword,rowIndex);

            // 只显示过滤的结果
            m_pListWgt->setRowHidden(rowIndex, !pass);
        }
    }
}

void PaiListDialog::OkButtonClicked()
{
    if(m_pListWgt)
    {
        emit SelectedAccepted(m_pListWgt->currentIndex().data().toString());
        close();
    }
}