#include "mainwidget.h"
#include "view/imageview.h"
#include "loadingwidget.h"

#include <QtCore/QVariant>
#include <QtWidgets/QApplication>
#include <QtWidgets/QGridLayout>
#include <QtWidgets/QHBoxLayout>
#include <QTextBlock>
#include <QStandardPaths>
#include <QFileDialog>
#include <QFileInfo>
#include <QThread>
#include <QMutexLocker>
#include <QSplitter>
#include <QTimer>

#include <DGuiApplicationHelper>
#include <DMainWindow>
#include <DTitlebar>
#include <DMessageManager>
#include <DToolButton>

#define App (static_cast<QApplication*>(QCoreApplication::instance()))
MainWidget::MainWidget(QWidget *parent) :
    DWidget(parent)
{
    setupUi(this);
    DGuiApplicationHelper::ColorType themeType = DGuiApplicationHelper::instance()->themeType();
    setIcons(themeType);

    setupConnect();
}

MainWidget::~MainWidget()
{
//    m_mainGridLayout->addLayout(m_buttonHorizontalLayout, 1, 0, 1, 1);
    if (m_mainGridLayout && m_buttonHorizontalLayout) {
        m_mainGridLayout->removeItem(m_buttonHorizontalLayout);
    }
    if (m_imageview) {
        m_imageview->deleteLater();
        m_imageview = nullptr;
    }
    if (m_mainGridLayout) {
        m_mainGridLayout->deleteLater();
        m_mainGridLayout = nullptr;
    }
    if (m_horizontalLayout) {
        m_horizontalLayout->deleteLater();
        m_horizontalLayout = nullptr;
    }
    if (m_plainTextEdit) {
        m_plainTextEdit->deleteLater();
        m_plainTextEdit = nullptr;
    }
    if (m_buttonHorizontalLayout) {
        m_buttonHorizontalLayout->deleteLater();
        m_buttonHorizontalLayout = nullptr;
    }
    if (m_tipHorizontalLayout) {
        m_tipHorizontalLayout->deleteLater();
        m_tipHorizontalLayout = nullptr;
    }
    if (m_tiplabel) {
        m_tiplabel->deleteLater();
        m_tiplabel = nullptr;
    }
    if (m_copyBtn) {
        m_copyBtn->deleteLater();
        m_copyBtn = nullptr;
    }
    if (m_exportBtn) {
        m_exportBtn->deleteLater();
        m_exportBtn = nullptr;
    }
    if (m_tipIconLabel) {
        m_tipIconLabel->deleteLater();
        m_tipIconLabel = nullptr;
    }

}

void MainWidget::setupUi(QWidget *Widget)
{

    QPalette pal;
    pal.setColor(QPalette::Background, QColor(255, 255, 255, 179));
    setAutoFillBackground(true);
    setPalette(pal);
    DMainWindow *mainWindow = static_cast<DMainWindow *>(this->parent());
    if (mainWindow) {
        mainWindow->titlebar()->setMenuVisible(false);
    }
    m_mainGridLayout = new QGridLayout(Widget);
    m_mainGridLayout->setSpacing(6);
    m_mainGridLayout->setContentsMargins(0, 0, 0, 6);
    m_mainGridLayout->setObjectName(QStringLiteral("gridLayout"));

    m_horizontalLayout = new QHBoxLayout(Widget);
    m_horizontalLayout->setSpacing(0);
    m_horizontalLayout->setObjectName(QStringLiteral("horizontalLayout"));

    m_plainTextEdit = new ResultTextView(Widget);
    m_plainTextEdit->setReadOnly(true);

    m_plainTextEdit->setObjectName(QStringLiteral("plainTextEdit"));


    if (!m_imageview) {
        m_imageview = new ImageView();
    }

    m_resultWidget = new DStackedWidget(this);
    m_resultWidget->setFocusPolicy(Qt::NoFocus);
    m_resultWidget->setMinimumWidth(220);


    m_loadingOcr = new loadingWidget(this);
    m_loadingOcr->setAlignment(Qt::AlignCenter);
    m_resultWidget->addWidget(m_loadingOcr);

    m_resultWidget->addWidget(m_plainTextEdit);

    m_noResult = new DLabel(this);
    m_noResult->setAlignment(Qt::AlignCenter);
    m_noResult->setText(tr("No text recognized"));
    m_resultWidget->addWidget(m_noResult);

    connect(m_loadingOcr, &loadingWidget::sigChangeSize, [ = ] {
        loadingUi();
    });
    QSplitter *mainSplitter = new QSplitter(Qt::Horizontal); //新建水平分割器
    mainSplitter->setHandleWidth(0);//分割线的宽度
    mainSplitter->setChildrenCollapsible(false);//不允许把分割出的子窗口拖小到0，最小值被限定为sizeHint或maxSize/minSize
    mainSplitter->addWidget(m_imageview);//把ui中拖出的各个控件拿走，放到分割器里面
    mainSplitter->addWidget(m_resultWidget);
    QList<int> list;
    list << 600 << 250;
    mainSplitter->setSizes(list);
//    m_horizontalLayout->addWidget(m_imageview);
//    m_horizontalLayout->addWidget(m_plainTextEdit);
    m_horizontalLayout->addWidget(mainSplitter);
    m_horizontalLayout->setStretch(0, 1);

    m_mainGridLayout->addLayout(m_horizontalLayout, 0, 0, 1, 1);
    m_mainGridLayout->setColumnStretch(0, 1);

    m_buttonHorizontalLayout = new QHBoxLayout(Widget);
    m_buttonHorizontalLayout->setContentsMargins(20, 0, 59, 0); //表示控件与窗体的左右边距
//    m_buttonHorizontalLayout->setSpacing(30);


    m_tipHorizontalLayout = new QHBoxLayout(Widget);

    m_tipIconLabel = new DLabel(Widget);
    m_tipIconLabel->setObjectName(QStringLiteral("tipIconLabel"));

    m_tipHorizontalLayout->addWidget(m_tipIconLabel);

    m_tiplabel = new DLabel(Widget);
    m_tiplabel->setObjectName(QStringLiteral("tiplabel"));

    m_tipHorizontalLayout->setSpacing(4);
    m_tipHorizontalLayout->addWidget(m_tiplabel);

    m_buttonHorizontalLayout->addLayout(m_tipHorizontalLayout);
    QSpacerItem *horizontalSpacer = new QSpacerItem(159, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
    m_buttonHorizontalLayout->addItem(horizontalSpacer);

    m_copyBtn = new DToolButton(Widget);
    m_copyBtn->setObjectName(QStringLiteral("Copy text"));
    m_copyBtn->setMaximumSize(QSize(40, 40));
    m_copyBtn->setToolTip(tr("Copy text"));

    m_buttonHorizontalLayout->addWidget(m_copyBtn);
    m_buttonHorizontalLayout->setSpacing(20);
    m_exportBtn = new DToolButton(Widget);
    m_exportBtn->setObjectName(QStringLiteral("Save as TXT"));
    m_exportBtn->setMaximumSize(QSize(40, 40));
    m_exportBtn->setToolTip(tr("Save as TXT"));

    m_buttonHorizontalLayout->addWidget(m_exportBtn);


    m_mainGridLayout->addLayout(m_buttonHorizontalLayout, 1, 0, 1, 1);


    retranslateUi(Widget);

    QMetaObject::connectSlotsByName(Widget);
    m_pwidget = new QWidget(this);
    m_pwidget->setFocusPolicy(Qt::NoFocus);
    m_pwidget->setAttribute(Qt::WA_TransparentForMouseEvents);
    m_pwidget->setFixedSize(this->width(), this->height() - 23);
    m_pwidget->move(0, 0);

}

void MainWidget::setupConnect()
{
    connect(DGuiApplicationHelper::instance(), &DGuiApplicationHelper::paletteTypeChanged, this, &MainWidget::setIcons);
    connect(m_exportBtn, &DIconButton::clicked, this, &MainWidget::slotExport);
    connect(m_copyBtn, &DIconButton::clicked, this, &MainWidget::slotCopy);
    connect(this, &MainWidget::sigResult, this, [ = ](const QString & result) {
        loadString(result);
        deleteLoadingUi();
    });
}

void MainWidget::retranslateUi(QWidget *Widget)
{
    Widget->setWindowTitle(QApplication::translate("Widget", "Widget", nullptr));
    m_tiplabel->setText(QApplication::translate("Widget", "Tips: The clearer the image is, the more accurate the text is", nullptr));
//    m_copyBtn->setText(QApplication::translate("Widget", "Copy", nullptr));
    //    m_exportBtn->setText(QApplication::translate("Widget", "Export", nullptr));
}

void MainWidget::createLoadingUi()
{
    m_isLoading = true;
    m_loadingWidget = new TextLoadWidget(this);
    m_loadingWidget->resize(40, 40);
    m_loadingWidget->show();
    m_loadingTip = new DLabel(tr("Recognizing"), this);
    m_loadingTip->show();
    if (m_imageview) {
        m_imageview->setForegroundBrush(QColor(0, 0, 0, 77)); //设置场景的前景色，类似于遮罩
    }
    //识别时
    if (m_copyBtn) {
        m_copyBtn->setEnabled(false);
    }
    if (m_exportBtn) {
        m_exportBtn->setEnabled(false);
    }
}

void MainWidget::deleteLoadingUi()
{
    m_isLoading = false;
    if (m_loadingWidget) {
        m_loadingWidget->deleteLater();
        m_loadingWidget = nullptr;
    }
    if (m_loadingTip) {
        m_loadingTip->deleteLater();
        m_loadingTip = nullptr;
    }
    m_imageview->setForegroundBrush(QColor(0, 0, 0, 0)); //设置场景的前景色，类似于遮罩
}

void MainWidget::loadingUi()
{
    if (m_loadingWidget && m_loadingTip && m_resultWidget) {
        int x = this->width() - m_resultWidget->width() / 2;
        int y = this->height() / 2 - 50;
        m_loadingWidget->move(x, y);
        m_loadingTip->move(x - 20, y + 24);
    }
    if (m_pwidget) {
        m_pwidget->setFixedSize(this->width(), this->height() - 48);
        m_pwidget->move(0, 0);
    }
}

void MainWidget::openImage(const QString &path)
{
    if (m_imageview) {
        QImage img(path);
        m_imgName = path;
        openImage(img);
    }
}

void MainWidget::openImage(const QImage &img,const QString & name)
{
    createLoadingUi();
    if (m_imageview) {
        m_imageview->openFilterImage(img);
        QTimer::singleShot(100, [ = ] {
            m_imageview->fitWindow();
        });
        m_imgName = name;
    }
    if (m_currentImg) {
        delete m_currentImg;
        m_currentImg = nullptr;
    }
    m_currentImg = new QImage(img);
    if (!m_loadImagethread) {
        m_loadImagethread = QThread::create([ = ]() {
            QMutexLocker locker(&m_mutex);
            m_result = TessOcrUtils::instance()->getRecogitionResult(m_currentImg, ResultType::RESULT_STRING);
            emit sigResult(m_result.result);
        });
    }
    connect(m_loadImagethread, &QThread::finished, m_loadImagethread, &QObject::deleteLater);
    m_loadImagethread->start();
}

void MainWidget::loadHtml(const QString &html)
{
    if (!html.isEmpty()) {
        m_resultWidget->setCurrentWidget(m_plainTextEdit);
        m_plainTextEdit->appendHtml(html);
    } else {
        resultEmpty();
    }
}

void MainWidget::loadString(const QString &string)
{
    if (!string.isEmpty()) {
        m_resultWidget->setCurrentWidget(m_plainTextEdit);
        m_plainTextEdit->appendPlainText(string);
        //新增识别完成按钮恢复
        if (m_copyBtn) {
            m_copyBtn->setEnabled(true);
        }
        if (m_exportBtn) {
            m_exportBtn->setEnabled(true);
        }
    } else {
        resultEmpty();
    }
}

void MainWidget::resultEmpty()
{
    m_resultWidget->setCurrentWidget(m_noResult);
    //新增如果未识别到，按钮置灰
    if (m_copyBtn) {
        m_copyBtn->setEnabled(false);
    }
    if (m_exportBtn) {
        m_exportBtn->setEnabled(false);
    }
}

void MainWidget::resizeEvent(QResizeEvent *event)
{
    return DWidget::resizeEvent(event);
}


void MainWidget::slotCopy()
{
    //选中内容则复制，未选中内容则不复制
    if (!m_plainTextEdit->textCursor().selectedText().isEmpty()) {
        m_plainTextEdit->copy();
    } else {
        QTextDocument *document = m_plainTextEdit->document();
        DPlainTextEdit *tempTextEdit = new DPlainTextEdit(this);
        tempTextEdit->setDocument(document);
        tempTextEdit->selectAll();
        tempTextEdit->copy();
        tempTextEdit->deleteLater();
        tempTextEdit = nullptr;
    }

    QIcon icon(":/assets/icon_toast_sucess_new.svg");
    DFloatingMessage *pDFloatingMessage = new DFloatingMessage(DFloatingMessage::MessageType::TransientType, m_pwidget);
    pDFloatingMessage->setBlurBackgroundEnabled(true);
    pDFloatingMessage->setMessage(tr("Copied"));
    pDFloatingMessage->setIcon(icon);
    pDFloatingMessage->raise();
    DMessageManager::instance()->sendMessage(m_pwidget, pDFloatingMessage);

}

void MainWidget::slotExport()
{
    QStringList list = QStandardPaths::standardLocations(QStandardPaths::DownloadLocation);
    QString download = "";
    if (list.size() > 0) {
        download = list.at(0);
    } else {
        QStringList home = QStandardPaths::standardLocations(QStandardPaths::HomeLocation);
        if (home.size() > 0) {
            download = home.at(0) + "/Downloads";
        }
    }

    QString fileName;
    if (!m_imgName.isEmpty()) {
        fileName = QFileInfo(m_imgName).completeBaseName();
    } else {
        fileName = tr("Results");
    }

    QString file_path = QFileDialog::getSaveFileName(this, "save as", download + "/" + fileName, "*.txt");
    qDebug() << file_path;

    QString path = file_path + ".txt";
    QFile file(path);
    if (file.open(QFile::WriteOnly | QFile::Text)) {
        QTextStream out(&file);
        out << m_plainTextEdit->document()->toPlainText();
    }
}

void MainWidget::setIcons(DGuiApplicationHelper::ColorType themeType)
{
    if (themeType == DGuiApplicationHelper::DarkType) {
        if (m_tipIconLabel) {
            m_tipIconLabel->setPixmap(QPixmap(":/assets/tip_dark.svg"));
            m_tipIconLabel->setFixedSize(QSize(14, 14));
        }

        if (m_copyBtn) {
            m_copyBtn->setIcon(QIcon(":/assets/copy_dark.svg"));
            m_copyBtn->setIconSize(QSize(36, 36));
        }
        if (m_exportBtn) {
            m_exportBtn->setIcon(QIcon(":/assets/download_dark.svg"));
            m_exportBtn->setIconSize(QSize(36, 36));
        }

        App->setWindowIcon(QIcon(":/assets/appicon_dark.svg"));
        DMainWindow *mainWindow = static_cast<DMainWindow *>(this->parent());
        if (mainWindow) {
            mainWindow->titlebar()->setIcon(QIcon(":/assets/appicon_dark.svg"));
        }
        if (m_isLoading && m_imageview) {
            m_imageview->setForegroundBrush(QColor(0, 0, 0, 150)); //设置场景的前景色，类似于遮罩
        }
    } else {
        if (m_tipIconLabel) {
            m_tipIconLabel->setPixmap(QPixmap(":/assets/tip_light.svg"));
            m_tipIconLabel->setFixedSize(QSize(14, 14));
        }

        if (m_copyBtn) {
            m_copyBtn->setIcon(QIcon(":/assets/copy_light.svg"));
            m_copyBtn->setIconSize(QSize(36, 36));
        }
        if (m_exportBtn) {
            m_exportBtn->setIcon(QIcon(":/assets/download_light.svg"));
            m_exportBtn->setIconSize(QSize(36, 36));
        }

        App->setWindowIcon(QIcon(":/assets/appicon_light.svg"));
        DMainWindow *mainWindow = static_cast<DMainWindow *>(this->parent());
        if (mainWindow) {
            mainWindow->titlebar()->setIcon(QIcon(":/assets/appicon_light.svg"));
        }
        if (m_isLoading && m_imageview) {
            m_imageview->setForegroundBrush(QColor(255, 255, 255, 150)); //设置场景的前景色，类似于遮罩
        }
    }
} // setupUi