/* -*- c++ -*- */
/*
 * Gqrx SDR: Software defined radio receiver powered by GNU Radio and Qt
 *           http://gqrx.dk/
 *
 * Copyright 2013 Christian Lindner DL2VCL, Stefano Leucci.
 *
 * Gqrx is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * Gqrx is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Gqrx; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
#include <Qt>
#include <QFile>
#include <QStringList>
#include <QTextStream>
#include <QString>
#include <QSet>
#include <algorithm>
#include "bookmarks.h"
#include <stdio.h>
#include <wchar.h>
#include <algorithm>
const QColor TagInfo::DefaultColor(Qt::lightGray);
const QString TagInfo::strUntagged("Untagged");
Bookmarks* Bookmarks::m_pThis = 0;

Bookmarks::Bookmarks()
{
	 TagInfo tag(TagInfo::strUntagged);
	 m_TagList.append(tag);
}

void Bookmarks::create()
{
	m_pThis = new Bookmarks;
}

Bookmarks& Bookmarks::Get()
{
	return *m_pThis;
}

void Bookmarks::setConfigDir(const QString& cfg_dir)
{
	m_bookmarksFile = cfg_dir + "/bookmarks.csv";
	printf("BookmarksFile is %s\n", m_bookmarksFile.toStdString().c_str());
}

void Bookmarks::add(BookmarkInfo &info)
{
	m_BookmarkList.append(info);
	std::stable_sort(m_BookmarkList.begin(),m_BookmarkList.end());
	save();
	emit( BookmarksChanged() );
}

void Bookmarks::remove(int index)
{
	m_BookmarkList.removeAt(index);
	save();
	emit BookmarksChanged();
}

bool Bookmarks::load()
{
	QFile file(m_bookmarksFile);
	if (file.open(QIODevice::ReadOnly | QIODevice::Text))
	{
		m_BookmarkList.clear();
		m_TagList.clear();

		// always create the "Untagged" entry.
		findOrAddTag(TagInfo::strUntagged);

		// Read Tags, until first empty line.
		while (!file.atEnd())
		{
			QString line = QString::fromUtf8(file.readLine().trimmed());

			if(line.isEmpty())
				break;

			if(line.startsWith("#"))
				continue;

			QStringList strings = line.split(";");
			if(strings.count() == 2)
			{
				TagInfo &info = findOrAddTag(strings[0]);
				info.color = QColor(strings[1].trimmed());
			}
			else
			{
				printf("\nBookmarks: Ignoring Line:\n  %s\n", line.toLatin1().data());
			}
		}
		std::sort(m_TagList.begin(),m_TagList.end());

		// Read Bookmarks, after first empty line.
		while (!file.atEnd())
		{
			QString line = QString::fromUtf8(file.readLine().trimmed());
			if(line.isEmpty() || line.startsWith("#"))
				continue;

			QStringList strings = line.split(";");
			if(strings.count() == 5)
			{
				BookmarkInfo info;
				info.frequency  = strings[0].toLongLong();
				info.name       = strings[1].trimmed();
				info.modulation = strings[2].trimmed();
				info.bandwidth  = strings[3].toInt();
				// Multiple Tags may be separated by comma.
				QString strTags = strings[4];
				QStringList TagList = strTags.split(",");
				for(int iTag=0; iTag<TagList.size(); ++iTag)
				{
				  info.tags.append(&findOrAddTag(TagList[iTag].trimmed()));
				}

				m_BookmarkList.append(info);
			}
			else
			{
				printf("\nBookmarks: Ignoring Line:\n  %s\n", line.toLatin1().data());
			}
		}
		file.close();
		std::stable_sort(m_BookmarkList.begin(),m_BookmarkList.end());

		emit BookmarksChanged();
		return true;
	}
	return false;
}

//FIXME: Commas in names
bool Bookmarks::save()
{
	QFile file(m_bookmarksFile);
	if(file.open(QFile::WriteOnly | QFile::Truncate | QIODevice::Text))
	{
		QTextStream stream(&file);

		stream << QString("# Tag name").leftJustified(20) + "; " +
				  QString(" color") << Qt::endl;

		QSet<TagInfo*> usedTags;
		for (int iBookmark = 0; iBookmark < m_BookmarkList.size(); iBookmark++)
		{
			BookmarkInfo& info = m_BookmarkList[iBookmark];
			for(int iTag = 0; iTag < info.tags.size(); ++iTag)
			{
			  TagInfo& tag = *info.tags[iTag];
			  usedTags.insert(&tag);
			}
		}

		for (QSet<TagInfo*>::iterator i = usedTags.begin(); i != usedTags.end(); i++)
		{
			TagInfo& info = **i;
			stream << info.name.leftJustified(20) + "; " + info.color.name() << Qt::endl;
		}

		stream << Qt::endl;

		stream << QString("# Frequency").leftJustified(12) + "; " +
				  QString("Name").leftJustified(25)+ "; " +
				  QString("Modulation").leftJustified(20) + "; " +
				  QString("Bandwidth").rightJustified(10) + "; " +
				  QString("Tags") << Qt::endl;

		for (int i = 0; i < m_BookmarkList.size(); i++)
		{
			BookmarkInfo& info = m_BookmarkList[i];
			QString line = QString::number(info.frequency).rightJustified(12) +
					"; " + info.name.leftJustified(25) + "; " +
					info.modulation.leftJustified(20)+ "; " +
					QString::number(info.bandwidth).rightJustified(10) + "; ";
			for(int iTag = 0; iTag<info.tags.size(); ++iTag)
			{
				TagInfo& tag = *info.tags[iTag];
				if(iTag!=0)
				{
					line.append(",");
				}
				line.append(tag.name);
			}

			stream << line << Qt::endl;
		}

		file.close();
		return true;
	}
	return false;
}

QList<BookmarkInfo> Bookmarks::getBookmarksInRange(qint64 low, qint64 high)
{
	BookmarkInfo info;
	info.frequency=low;
	QList<BookmarkInfo>::const_iterator lb = std::lower_bound(m_BookmarkList.begin(), m_BookmarkList.end(),info);
	info.frequency=high;
	QList<BookmarkInfo>::const_iterator ub = std::upper_bound(m_BookmarkList.begin(), m_BookmarkList.end(),info);

	QList<BookmarkInfo> found;

	while (lb != ub)
	{
		const BookmarkInfo& info = *lb;
		//if(info.IsActive())
		{
		  found.append(info);
		}
		lb++;
	}

	return found;

}

TagInfo &Bookmarks::findOrAddTag(QString tagName)
{
	tagName = tagName.trimmed();

	if (tagName.isEmpty())
		tagName=TagInfo::strUntagged;

	int idx = getTagIndex(tagName);

	if (idx != -1)
		return m_TagList[idx];

	TagInfo info;
	info.name=tagName;
	m_TagList.append(info);
	emit TagListChanged();
	return m_TagList.last();
}

bool Bookmarks::removeTag(QString tagName)
{
	tagName = tagName.trimmed();

	// Do not delete "Untagged" tag.
	if(tagName.compare(TagInfo::strUntagged, tagName)==0)
		return false;

	int idx = getTagIndex(tagName);
	if (idx == -1)
		return false;

	// Delete Tag from all Bookmarks that use it.
	TagInfo* pTagToDelete = &m_TagList[idx];
	for(int i=0; i<m_BookmarkList.size(); ++i)
	{
		BookmarkInfo& bmi = m_BookmarkList[i];
		for(int t=0; t<bmi.tags.size(); ++t)
		{
			TagInfo* pTag = bmi.tags[t];
			if(pTag == pTagToDelete)
			{
				if(bmi.tags.size()>1) bmi.tags.removeAt(t);
				else bmi.tags[0] = &findOrAddTag(TagInfo::strUntagged);
			}
		}
	}

	// Delete Tag.
	m_TagList.removeAt(idx);

	emit BookmarksChanged();
	emit TagListChanged();

	return true;
}

bool Bookmarks::setTagChecked(QString tagName, bool bChecked)
{
	int idx = getTagIndex(tagName);
	if (idx == -1) return false;
	m_TagList[idx].active = bChecked;
	emit BookmarksChanged();
	emit TagListChanged();
	return true;
}

int Bookmarks::getTagIndex(QString tagName)
{
	tagName = tagName.trimmed();
	for (int i = 0; i < m_TagList.size(); i++)
	{
		if (m_TagList[i].name == tagName)
			return i;
	}

	return -1;
}

const QColor BookmarkInfo::GetColor() const
{
	for(int iTag=0; iTag<tags.size(); ++iTag)
	{
		TagInfo& tag = *tags[iTag];
		if(tag.active)
		{
			return tag.color;
		}
	}
	return TagInfo::DefaultColor;
}

bool BookmarkInfo::IsActive() const
{
	bool bActive = false;
	for(int iTag=0; iTag<tags.size(); ++iTag)
	{
		TagInfo& tag = *tags[iTag];
		if(tag.active)
		{
			bActive = true;
			break;
		}
	}
	return bActive;
}