#include "historymessagewidget.h"

#include "model/datacenter.h"
#include "toast.h"
#include "soundrecorder.h"

using namespace model;

//工厂函数
HistoryItem* HistoryItem::makeHistoryItem(const Message& message)
{
    // 1. 创建出对象
    HistoryItem* item = new HistoryItem();
    item->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);

    // 2. 创建布局
    QGridLayout* layout = new QGridLayout();
    layout->setVerticalSpacing(0);
    layout->setHorizontalSpacing(10);
    layout->setContentsMargins(0, 0, 0, 0);
    item->setLayout(layout);

    // 3. 创建头像
    QPushButton* avatarBtn = new QPushButton();
    avatarBtn->setFixedSize(40, 40);
    avatarBtn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    avatarBtn->setIconSize(QSize(40, 40));
    // 当前消息发送者的头像
    avatarBtn->setIcon(message.sender.avatar);
    avatarBtn->setStyleSheet("QPushButton { border: none; }");

    // 4. 创建昵称和时间
    QLabel* nameLabel = new QLabel();
    nameLabel->setText(message.sender.nickname + " | " + message.time);
    nameLabel->setFixedHeight(20);   // 高度设置为头像高度的一半
    nameLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

    // 5. 消息内容部分
    QWidget* contentWidget = nullptr;
    if (message.messageType == model::MessageType::TEXT_TYPE) {
        // 文本消息
        QLabel* label = new QLabel();
        label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        label->setWordWrap(true);
        label->setText(QString(message.content));
        label->adjustSize();	// 设置让 label 能够自动调整大小
        contentWidget = label;
    }
    else if (message.messageType == model::MessageType::IMAGE_TYPE) {
        // 图片消息
        contentWidget = new ImageButton(message.fileId, message.content);
    }
    else if (message.messageType == model::MessageType::FILE_TYPE) {
        // 文件消息
        contentWidget = new FileLabel(message.fileId, message.fileName);
    }
    else if (message.messageType == model::MessageType::SPEECH_TYPE) {
        // 语音消息
        contentWidget = new SpeechLabel(message.fileId);
    }
    else {
        LOG() << "错误的消息类型! messageType=" << message.messageType;
    }

    // 6. 把上述控件添加到布局中
    layout->addWidget(avatarBtn, 0, 0, 2, 1);
    layout->addWidget(nameLabel, 0, 1, 1, 1);
    layout->addWidget(contentWidget, 1, 1, 5, 1);

    return item;

}

HistoryMessageWidget::HistoryMessageWidget(QWidget *parent)
	: QDialog(parent)
{
    // 1. 设置窗口本身属性
    this->setFixedSize(600, 600);
    this->setWindowTitle("历史消息");
    this->setWindowIcon(QIcon(":/resource/image/logo.png"));
    this->setStyleSheet("QWidget { background-color: rgb(255, 255, 255); }");
    this->setAttribute(Qt::WA_DeleteOnClose);

    // 2. 创建布局管理器.
    QGridLayout* layout = new QGridLayout();
    layout->setSpacing(10);
    layout->setContentsMargins(30, 30, 30, 0);
    this->setLayout(layout);

    // 3. 创建单选按钮
    keyRadioBtn = new QRadioButton();
    timeRadioBtn = new QRadioButton();
    keyRadioBtn->setText("按关键词查询");
    timeRadioBtn->setText("按时间查询");
    // 默认按照关键词查询
    keyRadioBtn->setChecked(true);
    layout->addWidget(keyRadioBtn, 0, 0, 1, 2);
    layout->addWidget(timeRadioBtn, 0, 2, 1, 2);

    // 4. 创建搜索框
    searchEdit = new QLineEdit();
    searchEdit->setFixedHeight(50);
    searchEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    searchEdit->setPlaceholderText("要搜索的关键词");
    searchEdit->setStyleSheet("QLineEdit { border: none; border-radius: 10px; color: rgb(129, 129, 129); background-color: rgb(240, 240, 240); font-size: 16px; padding-left: 10px; }");
    layout->addWidget(searchEdit, 1, 0, 1, 8);

    // 5. 创建搜索按钮
    QPushButton* searchBtn = new QPushButton();
    searchBtn->setFixedSize(50, 50);
    searchBtn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    searchBtn->setIconSize(QSize(30, 30));
    searchBtn->setIcon(QIcon(":/resource/image/search.png"));
    QString btnStyle = "QPushButton { border: none; background-color: rgb(240, 240, 240); border-radius: 10px; }";
    btnStyle += "QPushButton:pressed { background-color: rgb(220, 220, 220); }";
    searchBtn->setStyleSheet(btnStyle);
    layout->addWidget(searchBtn, 1, 8, 1, 1);

    // 6. 创建时间相关的部分控件, 初始情况下要隐藏
    QLabel* begTag = new QLabel();
    begTag->setText("开始时间");
    QLabel* endTag = new QLabel();
    endTag->setText("结束时间");
    begTimeEdit = new QDateTimeEdit();
    endTimeEdit = new QDateTimeEdit();

    begTimeEdit->setStyleSheet("QDateTimeEdit { color: rgb(0, 0, 0); } ");
    endTimeEdit->setStyleSheet("QDateTimeEdit { color: rgb(0, 0, 0); } ");
    // [联调新增]
    begTimeEdit->setDisplayFormat("yyyy-MM-dd hh:mm");
    endTimeEdit->setDisplayFormat("yyyy-MM-dd hh:mm");
    begTimeEdit->setFixedHeight(40);
    endTimeEdit->setFixedHeight(40);

    begTag->hide();
    endTag->hide();
    begTimeEdit->hide();
    endTimeEdit->hide();

    // 7. 创建滚动区域
    initScrollArea(layout);

    // 8. 设置槽函数
    connect(keyRadioBtn, &QRadioButton::clicked, this, [=]() {
        // 把时间相关的控件, 隐藏起来
        layout->removeWidget(begTag);
        layout->removeWidget(begTimeEdit);
        layout->removeWidget(endTag);
        layout->removeWidget(endTimeEdit);
        begTag->hide();
        begTimeEdit->hide();
        endTag->hide();
        endTimeEdit->hide();

        // 把关键词搜索框显示加入布局
        layout->addWidget(searchEdit, 1, 0, 1, 8);
        searchEdit->show();
        });

    connect(timeRadioBtn, &QRadioButton::clicked, this, [=]() {
        // 关键词搜索框隐藏并从布局中删除掉.
        layout->removeWidget(searchEdit);
        searchEdit->hide();

        // 把时间相关的控件, 添加到布局中, 并且进行显示.
        layout->addWidget(begTag, 1, 0, 1, 1);
        layout->addWidget(begTimeEdit, 1, 1, 1, 3);
        layout->addWidget(endTag, 1, 4, 1, 1);
        layout->addWidget(endTimeEdit, 1, 5, 1, 3);
        begTag->show();
        begTimeEdit->show();
        endTag->show();
        endTimeEdit->show();
        });

    connect(searchBtn, &QPushButton::clicked, this, &HistoryMessageWidget::clickSearchBtn);

    // 构造测试数据
#if TEST_UI
    for (int i = 0; i < 30; ++i) {
        // 注意此处代码和前面的差别.
        // 前面有个代码, UserInfo 必须要 new 出来才能构造. 当时 Item 对象里, 持有了 const UserInfo& , 不是 new 的话
        // 就可能使引用指向的对象失效的.
        // 此处后续的代码, 都是按照传值的方式来使用 message 的内容, 不 new 也行.
        model::UserInfo sender;
        sender.userId = "";
        sender.nickname = "张三" + QString::number(i);
        sender.avatar = QIcon(":/resource/image/defaultAvatar.png");
        sender.description = "";
        sender.phone = "18612345678";
        Message message = Message::makeMessage(model::MessageType::TEXT_TYPE, "", sender, QString("消息内容" + QString::number(i)).toUtf8(), "");
        this->addHistoryMessage(message);
    }
#endif

}

void HistoryMessageWidget::addHistoryMessage(const Message& message)
{
    HistoryItem* item = HistoryItem::makeHistoryItem(message);
    container->layout()->addWidget(item);

}

void HistoryMessageWidget::clear()
{
    QVBoxLayout* layout = dynamic_cast<QVBoxLayout*>(container->layout());
    for (int i = layout->count() - 1; i >= 0; i--) {
        //之前使用的是takeat，效果和这个是一样的，
        QWidget* w = layout->itemAt(i)->widget();
        if (w == nullptr) {
            continue;
        }
        layout->removeWidget(w);
        w->deleteLater();
    }
}

void HistoryMessageWidget::clickSearchBtn()
{
    DataCenter* dataCenter = DataCenter::getInstance();
    connect(dataCenter, &DataCenter::searchMessageDone, this, &HistoryMessageWidget::clickSearchBtnDone, Qt::UniqueConnection);

    //此处需要根据单选框的选中情况，执行不同逻辑
    if (keyRadioBtn->isChecked()) {
        //按照关键词搜索
        const QString& searchKey = searchEdit->text();
        if (searchKey.isEmpty()) {
            return;
        }
        dataCenter->searchMessageAsync(searchKey);
    }
    else {
        //安时间搜索
        auto begTime = begTimeEdit->dateTime();
        auto endTime = endTimeEdit->dateTime();
        if (begTime >= endTime) {
            Toast::showMessage("时间设置有误");
            return;
        }
        dataCenter->searchMessageByTimeAsync(begTime, endTime);
    }
}

void HistoryMessageWidget::clickSearchBtnDone()
{
    //从DataCenter中拿到消息搜索结果列表
    DataCenter* dataCenter = DataCenter::getInstance();
    QList<Message>* messageResult = dataCenter->getSearchMessageReuslt();
    if (messageResult == nullptr) {
        return;
    }

    //把结果列表的数据，显示到界面上
    this->clear();
    for (const Message& m : *messageResult) {
        this->addHistoryMessage(m);
    }
}

void HistoryMessageWidget::initScrollArea(QGridLayout* layout)
{
    // 1. 创建滚动区域对象
    QScrollArea* scrollArea = new QScrollArea();
    scrollArea->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    scrollArea->setWidgetResizable(true);
    scrollArea->verticalScrollBar()->setStyleSheet("QScrollBar:vertical { width: 2px; background-color: rgb(255, 255, 255); }");
    scrollArea->horizontalScrollBar()->setStyleSheet("QScrollBar:horizontal { height: 0; }");
    scrollArea->setStyleSheet("QScrollArea { border: none; }");

    // 2. 创建 QWidget, 持有要加入的新的内容
    container = new QWidget();
    scrollArea->setWidget(container);

    // 3. 创建 container 中的布局管理器.
    QVBoxLayout* vlayout = new QVBoxLayout();
    vlayout->setSpacing(10);
    vlayout->setContentsMargins(0, 0, 0, 0);
    vlayout->setAlignment(Qt::AlignTop);
    container->setLayout(vlayout);

    // 4. 把滚动区加入到整个 layout 中
    layout->addWidget(scrollArea, 2, 0, 1, 9);

}

ImageButton::ImageButton(const QString& fileId, const QByteArray& content)
    :fileId(fileId)
{
    this->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    this->setStyleSheet("QPushButton { border: none; }");

    if (!content.isEmpty()) {
        // 直接显示到界面上
        this->updateUI(fileId, content);
    }
    else {
        // 通过网络来获取
        DataCenter* dataCenter = DataCenter::getInstance();
        connect(dataCenter, &DataCenter::getSingleFileDone, this, &ImageButton::updateUI);
        dataCenter->getSingleFileAsync(fileId);
    }

}

void ImageButton::updateUI(const QString& fileId, const QByteArray& content)
{
    if (this->fileId != fileId) {
        return;
    }
    // 如果图片尺寸太大, 需要进行缩放.
    QImage image;
    image.loadFromData(content);

    int width = image.width();
    int height = image.height();
    if (image.width() >= 300) {
        // 进行缩放, 缩放之后, 宽度就是固定的 300
        width = 300;
        height = ((double)image.height() / image.width()) * width;
    }
    this->resize(width, height);
    this->setIconSize(QSize(width, height));
    QPixmap pixmap = QPixmap::fromImage(image);
    this->setIcon(QIcon(pixmap));

}

FileLabel::FileLabel(const QString& fileId, const QString& fileName)
    :fileId(fileId), filename(fileName)
{
    this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    this->setText("[文件] " + fileName);
    this->setWordWrap(true);
    // 自动调整尺寸让能够显示下文字内容
    this->adjustSize();
    this->setAlignment(Qt::AlignTop | Qt::AlignLeft);

    // if (!content.isEmpty()) {
    //     // 原则上来说, 这个条件不会触发. 因为这里的 content 是来自于请求服务器的 历史消息列表的 接口.
    //     // 请求这个接口的过程中, 拿到的 Message 对象(不是文本), content 必然为 空, 通过 fileId 做二次请求.
    //     return;
    // }

    // 需要从网络加载数据了
    DataCenter* dataCenter = DataCenter::getInstance();
    connect(dataCenter, &DataCenter::getSingleFileDone, this, &FileLabel::getContentDone);
    dataCenter->getSingleFileAsync(this->fileId);

}

void FileLabel::getContentDone(const QString& fileId, const QByteArray& fileContent)
{
    if (fileId != this->fileId) {
        return;
    }

    this->content = fileContent;
    this->loadDone = true;
}

void FileLabel::mousePressEvent(QMouseEvent* event)
{
    (void)event;
    if (!this->loadDone) {
        // 说明数据还没准备好.
        Toast::showMessage("文件内容加载中, 请稍后尝试!");
        return;
    }

    // 弹出一个对话框, 让用户来选择当前要保存的位置
    QString filePath = QFileDialog::getSaveFileName(this, "另存为", QDir::homePath(), "*");
    if (filePath.isEmpty()) {
        // 用户取消了保存
        LOG() << "用户取消了保存";
        return;
    }

    writeByteArrayToFile(filePath, content);
}

SpeechLabel::SpeechLabel(const QString& fileId)
    :fileId(fileId)
{
    this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    this->setText("[语音]");
    this->setAlignment(Qt::AlignLeft | Qt::AlignTop);
    // 这两个操作不太需要了. 此处只有 语音 两个字
    this->setWordWrap(true);
    this->adjustSize();

    DataCenter* dataCenter = DataCenter::getInstance();
    connect(dataCenter, &DataCenter::getSingleFileDone, this, &SpeechLabel::getContentDone);
    dataCenter->getSingleFileAsync(fileId);

}

void SpeechLabel::getContentDone(const QString& fileId, const QByteArray& content)
{
    if (fileId != this->fileId) {
        return;
    }
    this->content = content;
    this->loadDone = true;
}

void SpeechLabel::mousePressEvent(QMouseEvent* event)
{
    (void)event;
    if (!this->loadDone) {
        Toast::showMessage("文件内容加载中, 稍后重试");
        return;
    }
    SoundRecorder* soundRecorder = SoundRecorder::getInstance();
    soundRecorder->startPlay(this->content);
}