#include "logwindow.h"
#include "ui_logwindow.h"

LogWindow::LogWindow(QWidget *parent) :
 QDialog(parent),
 ui(new Ui::LogWindow)
{
 ui->setupUi(this);
 setWindowTitle("LinkScope - Log");

 tableModel=new QStandardItemModel(this);//创建表格数据
 ui->tb_log->setModel(tableModel);//绑定表格数据
 ui->tb_log->horizontalHeader()->setMinimumSectionSize(150);//设置最小列宽
 ui->tb_log->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);//列宽可由用户调整
 ui->tb_log->verticalHeader()->setSectionResizeMode(QHeaderView::Stretch);//行高自动拉伸
 ui->tb_log->verticalHeader()->hide();//隐藏垂直表头,否则滚动语句执行时间较长
 drawTableHeader();//设置表头
}

LogWindow::~LogWindow()
{
 delete ui;
 delete tableModel;
}

//添加一条日志
void LogWindow::addLog(char attr, const QString &tag, const QString &msg, qulonglong time, const QString &func)
{
 //计算日志类型字符对应的颜色和属性名
 QColor textColor=Qt::black;
 QString attrText="Unknown";
 switch(attr)
 {
 case 'i':
 textColor=QColor("#218B47");
 attrText="Info";
 break;
 case 'd':
 textColor=QColor("#0046EB");
 attrText="Debug";
 break;
 case 'w':
 textColor=QColor("#FF8C00");
 attrText="Warn";
 break;
 case 'e':
 textColor=QColor("#EB005F");
 attrText="Error";
 break;
 }
 //创建各单元格数据
 QList<QStandardItem*> items;
 items<<new QStandardItem(attrText)
 <<new QStandardItem(tag)
 <<new QStandardItem(msg)
 <<new QStandardItem(QString("%1:%2:%3.%4")
 .arg(time/1000/3600,2,10,QChar('0'))
 .arg(time/1000/60%60,2,10,QChar('0'))
 .arg(time/1000%60,2,10,QChar('0'))
 .arg(time%1000,3,10,QChar('0')))
 <<new QStandardItem(func);
 for(int i=0;i<5;i++)
 {
 items[i]->setForeground(QBrush(textColor));//设置文字颜色
 items[i]->setFlags(Qt::ItemIsEnabled);//设置为不可编辑
 }
 //若当前表格滚动到底端则在插入新行后自动滚动到底端
 bool scrollAtEnd=ui->tb_log->verticalScrollBar()->value()==ui->tb_log->verticalScrollBar()->maximum();
 tableModel->insertRow(tableModel->rowCount(),items);//在表格末尾插入新行
 if(scrollAtEnd)
 ui->tb_log->scrollToBottom();
}

//清空所有日志
void LogWindow::clearLog()
{
 QByteArray horiHeaderState=ui->tb_log->horizontalHeader()->saveState();//记录列宽
 tableModel->clear();
 drawTableHeader();
 ui->tb_log->horizontalHeader()->restoreState(horiHeaderState);//恢复列宽
}

//绘制表头
void LogWindow::drawTableHeader()
{
 tableModel->setColumnCount(5);
 tableModel->setHeaderData(0,Qt::Horizontal,"类型");
 tableModel->setHeaderData(1,Qt::Horizontal,"TAG");
 tableModel->setHeaderData(2,Qt::Horizontal,"MSG");
 tableModel->setHeaderData(3,Qt::Horizontal,"时间戳");
 tableModel->setHeaderData(4,Qt::Horizontal,"函数名");
}

//将表格数据导出到CSV文件
bool LogWindow::exportCSV(const QString &filename)
{
 QFile file(filename);
 if(!file.open(QFile::WriteOnly))
 return false;
 QTextStream outStream(&file);//使用流方式输出

 outStream<<"Type,TAG,MSG,Timestamp,Function\n";

 for(int row=0;row<tableModel->rowCount();row++)
 {
 for(int col=0;col<tableModel->columnCount();col++)
 outStream<<tableModel->item(row,col)->text()<<',';
 outStream<<'\n';
 }

 return true;
}

//清空日志按钮点击
void LogWindow::on_bt_clear_clicked()
{
 clearLog();
}

//导出日志按钮点击
void LogWindow::on_bt_export_clicked()
{
 //弹出文件选择框
 QFileDialog *fileDialog = new QFileDialog(this);
 fileDialog->setWindowTitle(QStringLiteral("选中文件"));
 fileDialog->setDirectory(".");
 fileDialog->setNameFilter(tr("CSV File (*.csv)"));
 fileDialog->setFileMode(QFileDialog::AnyFile);
 fileDialog->setViewMode(QFileDialog::Detail);
 if(fileDialog->exec())//等待用户选择文件
 {
 QStringList fileList=fileDialog->selectedFiles();
 QString fileName=fileList.at(0);
 if(!fileName.endsWith(".csv"))//若用户输入的文件名不以csv结尾则加上后缀
 fileName.append(".csv");
 QFileInfo file(fileName);//判断是否已经存在文件,若存在则弹出覆盖警告框
 if(file.exists())
 {
 QMessageBox messageBox(QMessageBox::NoIcon,"警告", "文件已存在,是否覆盖?",QMessageBox::Yes | QMessageBox::No, NULL);
 if(messageBox.exec()!=QMessageBox::Yes)
 return;
 }
 if(!exportCSV(fileName))//将数据写入文件
 {
 QMessageBox::information(this,"错误","文件打开失败,请检查文件是否被占用");
 }
 }
}