#include "backuppointlistdialog.h"
#include "ui_backuppointlistdialog.h"
#include <QHeaderView>
#include <QFile>
#include "component/mylabel.h"
#include "component/mypushbutton.h"
#include "../common/utils.h"
#include "globalbackupinfo.h"
#include "gsettingswrapper.h"

BackupPointListDialog::BackupPointListDialog(QWidget *parent, bool isOnlyShowLocal) :
    QDialog(parent),
    ui(new Ui::BackupPointListDialog),
    m_udector(new UdiskDetector()),
    m_onlyShowLocal(isOnlyShowLocal)
{
    ui->setupUi(this);

    // 到各个子类中去设置
    // this->setWindowTitle(tr("Backup Points"));
    // 去掉最大化、最小化按钮，保留关闭按钮，但是设置后窗口不显示了，实验了几种方式均不可以
    // this->setWindowFlags(Qt::WindowCloseButtonHint);
    // this->setWindowFlags(this->windowFlags() & ~Qt::WindowMinMaxButtonsHint);

    this->setMinimumSize(QSize(800, 368));
    this->setAutoFillBackground(true);

    // 纵向布局
    QVBoxLayout *vlayout = new QVBoxLayout;
    vlayout->setContentsMargins(20, 0, 20, 10);

    QStringList headerLabels;
    // 注意：此处的列需要和枚举Column_Index一一对应
    headerLabels << tr("Backup Name") << tr("UUID") << tr("Backup Time")  << tr("Backup Size") << tr("Position") << QObject::tr("Backup State") << QObject::tr("PrefixPath");
    m_tableWidget = new QTableWidget;
    m_tableWidget->setColumnCount(headerLabels.size());
    m_tableWidget->setHorizontalHeaderLabels(headerLabels);
    m_tableWidget->horizontalHeader()->setDefaultAlignment(Qt::AlignLeft);
    // m_tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
    m_tableWidget->horizontalHeader()->resizeSection(Column_Index::Backup_Name, 200);
    // m_tableWidget->horizontalHeader()->resizeSection(Column_Index::UUID, 310);
    m_tableWidget->horizontalHeader()->resizeSection(Column_Index::Backup_Time, 150);
    m_tableWidget->horizontalHeader()->resizeSection(Column_Index::Backup_Size, 120);
    m_tableWidget->horizontalHeader()->setSectionResizeMode(Column_Index::Backup_Device, QHeaderView::Stretch);
    m_tableWidget->horizontalHeader()->resizeSection(Column_Index::Backup_State, 120);
    m_tableWidget->horizontalHeader()->setTextElideMode( Qt::ElideRight);
    m_tableWidget->horizontalHeader()->setFixedHeight(36);
    m_tableWidget->verticalHeader()->setHidden(true); // 好像隐藏不掉
    m_tableWidget->verticalHeader()->setVisible(false); //左侧标题不可见
    m_tableWidget->verticalHeader()->setDefaultSectionSize(36); // 设置行高
    m_tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
    m_tableWidget->hideColumn(Column_Index::UUID);
    m_tableWidget->hideColumn(Column_Index::Prefix_Path);
    m_tableWidget->setSortingEnabled(false); // 等录入完数据后再排序
    m_tableWidget->setAlternatingRowColors(true);
    m_tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
    m_tableWidget->setShowGrid(false);
    vlayout->addWidget(m_tableWidget);

    m_bottomLayout = new QHBoxLayout;
    vlayout->addLayout(m_bottomLayout);
    this->setLayout(vlayout);

    // 添加本地默认路径、移动设备目录
    connect(m_udector, &UdiskDetector::udiskListChanged, this, [=](QList<QStorageInfo> diskList) {
        this->m_udiskPaths.clear();
        // 将本地默认备份路径放在第一个
        this->m_udiskPaths << Utils::getSysRootPath();

        if (this->m_onlyShowLocal)
            return;

        // 移动设备挂载路径
        for (QStorageInfo& disk : diskList) {
            this->m_udiskPaths << disk.rootPath();
        }

        emit this->udiskChange();
    });
    m_udector->getStorageInfo();

    // 表格中的布局
    // 列表为空时展示图片
    m_labelEmpty = new PixmapLabel(m_tableWidget);
    m_labelEmpty->setLightAndDarkPixmap(":/images/empty.png", ":/images/empty_dark.png");
    m_labelEmptyText = new QLabel(tr("No Backup"));
    m_labelEmptyText->setEnabled(false);
    m_labelEmpty->setVisible(false);
    m_labelEmptyText->setVisible(false);

    QHBoxLayout *layoutEmptyPng = new QHBoxLayout;
    layoutEmptyPng->addStretch();
    layoutEmptyPng->addWidget(m_labelEmpty);
    layoutEmptyPng->addStretch();
    QHBoxLayout *layoutEmptyText = new QHBoxLayout;
    layoutEmptyText->addStretch();
    layoutEmptyText->addWidget(m_labelEmptyText);
    layoutEmptyText->addStretch();

    QVBoxLayout *layoutTable = new QVBoxLayout;
    layoutTable->addStretch();
    layoutTable->addLayout(layoutEmptyPng);
    layoutTable->addLayout(layoutEmptyText);
    layoutTable->addStretch();
    m_tableWidget->setLayout(layoutTable);
}

BackupPointListDialog::~BackupPointListDialog()
{
    delete m_udector;
    delete ui;
}

/**
 * @brief 获取本地和移动设备中的备份点
 * @return
 */
QList<ParseBackupList::BackupPoint> BackupPointListDialog::getBackupPointList()
{
    QList<ParseBackupList::BackupPoint> list;
    for (QString backupPath : m_udiskPaths) {
        backupPath += BACKUP_XML_PATH;
        backupPath.replace("//", "/");

        QFile xmlFile(backupPath);
        if (!xmlFile.exists() || 0 == xmlFile.size()) {
            continue;
        }

        ParseBackupList parse(backupPath);
        list.append(parse.getBackupPointList());
    }

    return list;
}

/**
 * @brief 屏蔽部分键盘
 * @param event
 * @note 没有限制住QTableWidget子控件接收按键输入
 */
void BackupPointListDialog::keyPressEvent(QKeyEvent* event)
{
    switch (event->key()) {
    case Qt::Key_Escape:
    case Qt::Key_Up:
    case Qt::Key_Down:
    case Qt::Key_Left:
    case Qt::Key_Right:
        //忽略，什么都不做
        break;
    default:
        QWidget::keyPressEvent(event);
    }
}

/**
 * @brief 设置QTableWidget的单元格内容
 * @param row
 * @param column
 * @param text
 */
void BackupPointListDialog::setItem(int row, int column, const QString& text, int alignFlag)
{
    QTableWidgetItem *item = new QTableWidgetItem;
    item->setText(text);
    item->setToolTip(text);
    item->setTextAlignment(alignFlag);
    m_tableWidget->setItem(row, column, item);
}

/**
 * @brief 获取单元格的内容
 * @param row
 * @param column
 * @return QString，单元格的内容
 */
QString BackupPointListDialog::text(int row, int column)
{
    QTableWidgetItem *item = m_tableWidget->item(row, column);
    if (item)
        return item->text();
    else
        return "";
}

void BackupPointListDialog::paintEvent(QPaintEvent *event)
{
    QPalette palette = this->palette();
    palette.setColor(QPalette::Window, palette.color(QPalette::Base));
    this->setPalette(palette);
    QDialog::paintEvent(event);
}