#include "LogPage.h"
#include "ui_LogPage.h"

#include <QIcon>
#include <QScrollBar>

#include "logic/MinecraftProcess.h"
#include "gui/GuiUtil.h"

QString LogPage::displayName() const
{
	return tr("Minecraft Log");
}

QIcon LogPage::icon() const
{
	return QIcon::fromTheme("refresh");
}

QString LogPage::id() const
{
	return "console";
}

LogPage::LogPage(MinecraftProcess *proc, QWidget *parent)
	: QWidget(parent), ui(new Ui::LogPage), m_process(proc)
{
	ui->setupUi(this);
	connect(m_process, SIGNAL(log(QString, MessageLevel::Enum)), this,
		SLOT(write(QString, MessageLevel::Enum)));
}

LogPage::~LogPage()
{
	delete ui;
}

bool LogPage::apply()
{
	return true;
}

bool LogPage::shouldDisplay() const
{
	return m_process->instance()->isRunning();
}

void LogPage::on_btnPaste_clicked()
{
	GuiUtil::uploadPaste(ui->text->toPlainText(), this);
}

void LogPage::on_btnCopy_clicked()
{
	GuiUtil::setClipboardText(ui->text->toPlainText());
}

void LogPage::on_btnClear_clicked()
{
	ui->text->clear();
}

void LogPage::writeColor(QString text, const char *color, const char * background)
{
	// append a paragraph
	QString newtext;
	newtext += "<span style=\"";
	{
		if (color)
			newtext += QString("color:") + color + ";";
		if (background)
			newtext += QString("background-color:") + background + ";";
		newtext += "font-family: monospace;";
	}
	newtext += "\">";
	newtext += text.toHtmlEscaped();
	newtext += "</span>";
	ui->text->appendHtml(newtext);
}

void LogPage::write(QString data, MessageLevel::Enum mode)
{
	QScrollBar *bar = ui->text->verticalScrollBar();
	int max_bar = bar->maximum();
	int val_bar = bar->value();
	if(isVisible())
	{
		if (m_scroll_active)
		{
			m_scroll_active = (max_bar - val_bar) <= 1;
		}
		else
		{
			m_scroll_active = val_bar == max_bar;
		}
	}
	if (data.endsWith('\n'))
		data = data.left(data.length() - 1);
	QStringList paragraphs = data.split('\n');
	QStringList filtered;
	for (QString &paragraph : paragraphs)
	{
		// Quick hack for
		if(paragraph.contains("Detected an attempt by a mod null to perform game activity during mod construction"))
			continue;
		filtered.append(paragraph.trimmed());
	}
	QListIterator<QString> iter(filtered);
	if (mode == MessageLevel::MultiMC)
		while (iter.hasNext())
			writeColor(iter.next(), "blue", 0);
	else if (mode == MessageLevel::Error)
		while (iter.hasNext())
			writeColor(iter.next(), "red", 0);
	else if (mode == MessageLevel::Warning)
		while (iter.hasNext())
			writeColor(iter.next(), "orange", 0);
	else if (mode == MessageLevel::Fatal)
		while (iter.hasNext())
			writeColor(iter.next(), "red", "black");
	else if (mode == MessageLevel::Debug)
		while (iter.hasNext())
			writeColor(iter.next(), "green", 0);
	else if (mode == MessageLevel::PrePost)
		while (iter.hasNext())
			writeColor(iter.next(), "grey", 0);
	// TODO: implement other MessageLevels
	else
		while (iter.hasNext())
			writeColor(iter.next(), 0, 0);
	if(isVisible())
	{
		if (m_scroll_active)
		{
			bar->setValue(bar->maximum());
		}
		m_last_scroll_value = bar->value();
	}
}