/**
 * Copyright 2014 (c) Anna Schumaker.
 */
#include <core/index.h>


IndexEntry :: IndexEntry() {}
IndexEntry :: IndexEntry(const std::string &key)
	    : _key(key)
{}

const std::string IndexEntry :: primary_key() const
{
	return _key;
}

void IndexEntry :: insert(unsigned int value)
{
	_values.insert(value);
}

void IndexEntry :: remove(unsigned int value)
{
	_values.erase(value);
}

size_t IndexEntry :: size()
{
	return _values.size();
}

bool IndexEntry :: has(unsigned int value)
{
	return _values.find(value) != _values.end();
}

typename IndexEntry::iterator IndexEntry :: begin()
{
	return _values.begin();
}

typename IndexEntry::iterator IndexEntry :: end()
{
	return _values.end();
}

void IndexEntry :: write(File &file)
{
	std::set<unsigned int>::iterator it;
	file << _key << std::endl << _values.size() << " ";
	for (it = _values.begin(); it != _values.end(); it++)
		file << *it << " ";
}

void IndexEntry :: read(File &file)
{
	unsigned int num, val;

	file >> _key >> num;
	for (unsigned int i = 0; i < num; i++) {
		file >> val;
		insert(val);
	}
}



Index :: Index(const std::string &filepath, bool autosave)
	: Database(filepath, autosave)
{}

void Index :: insert(const std::string &key, unsigned int value)
{
	IndexEntry *it = find(key);
	if (it == NULL)
		it = Database :: insert(IndexEntry(key));

	it->insert(value);
	autosave();
}

void Index :: remove(const std::string &key, unsigned int value)
{
	IndexEntry *it = find(key);

	if (it == NULL)
		return;

	it->remove(value);
	autosave();
}