#include <string.h>
#include <string>
#include <map>
#include "base64.h"
#include "util.h"
#include "Identity.h"
#include "Log.h"
#include "AddressBook.h"

#include <boost/algorithm/string.hpp>

namespace i2p
{
namespace data
{

	AddressBook::AddressBook (): m_IsLoaded (false), m_IsDowloading (false)
	{
	}

	
	const IdentHash * AddressBook::FindAddress (const std::string& address)
	{
		if (!m_IsLoaded)
			LoadHosts ();
		if (m_IsLoaded)
		{
			auto it = m_Addresses.find (address);
			if (it != m_Addresses.end ())
				return &it->second;
		}
		return nullptr;	
	}

	void AddressBook::LoadHostsFromI2P ()
	{
		std::string content;
		int http_code = i2p::util::http::httpRequestViaI2pProxy("http://udhdrtrcetjm5sxzskjyr5ztpeszydbh4dpl3pl4utgqqw2v4jna.b32.i2p/hosts.txt", content);
		if (http_code == 200)
		{
			std::ofstream f_save(i2p::util::filesystem::GetFullPath("hosts.txt").c_str(), std::ofstream::out);
			if (f_save.is_open())
			{
				f_save << content;
				f_save.close();
			}
			else
				LogPrint("Can't write hosts.txt");
			m_IsLoaded = false;
		}	
		else
			LogPrint ("Failed to download hosts.txt");
		m_IsDowloading = false;	
	
		return;
	}

	void AddressBook::LoadHosts ()
	{
		std::ifstream f (i2p::util::filesystem::GetFullPath ("hosts.txt").c_str (), std::ofstream::in); // in text mode
		if (!f.is_open ())	
		{
			LogPrint ("hosts.txt not found. Try to load...");
			if (!m_IsDowloading)
			{
				m_IsDowloading = true;
				std::thread load_hosts(&AddressBook::LoadHostsFromI2P, this);
				load_hosts.detach();
			}
			return;
		}
		int numAddresses = 0;

		std::string s;

		while (!f.eof ())
		{
			getline(f, s);

			if (!s.length())
				continue; // skip empty line

			size_t pos = s.find('=');

			if (pos != std::string::npos)
			{
				std::string name = s.substr(0, pos++);
				std::string addr = s.substr(pos);

				IdentityEx ident;
				ident.FromBase64(addr);
				m_Addresses[name] = ident.GetIdentHash ();
				numAddresses++;
			}		
		}
		LogPrint (numAddresses, " addresses loaded");
		m_IsLoaded = true;
	}

}
}