/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org)    *
 *                                                                            *
 * This program 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 2             *
 * of the License, or (at your option) any later version.                     *
 *                                                                            *
 * This program 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 this program; if not, write to the Free Software Foundation     *
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
 ******************************************************************************/

#include "remote/httphandler.hpp"
#include "base/singleton.hpp"

using namespace icinga;

Dictionary::Ptr HttpHandler::m_UrlTree;

void HttpHandler::Register(const Url::Ptr& url, const HttpHandler::Ptr& handler)
{
	if (!m_UrlTree)
		m_UrlTree = new Dictionary();

	Dictionary::Ptr node = m_UrlTree;

	BOOST_FOREACH(const String& elem, url->GetPath()) {
		Dictionary::Ptr children = node->Get("children");

		if (!children) {
			children = new Dictionary();
			node->Set("children", children);
		}

		Dictionary::Ptr sub_node = children->Get(elem);
		if (!sub_node) {
			sub_node = new Dictionary();
			children->Set(elem, sub_node);
		}

		node = sub_node;
	}

	node->Set("handler", handler);
}

bool HttpHandler::CanAlsoHandleUrl(const Url::Ptr& url) const
{
	return false;
}

void HttpHandler::ProcessRequest(const ApiUser::Ptr& user, HttpRequest& request, HttpResponse& response)
{
	Dictionary::Ptr node = m_UrlTree;
	HttpHandler::Ptr current_handler, handler;
	bool exact_match = true;

	BOOST_FOREACH(const String& elem, request.RequestUrl->GetPath()) {
		current_handler = node->Get("handler");
		if (current_handler)
			handler = current_handler;

		Dictionary::Ptr children = node->Get("children");

		if (!children) {
			exact_match = false;
			node.reset();
			break;
		}

		node = children->Get(elem);

		if (!node) {
			exact_match = false;
			break;
		}
	}

	if (node) {
		current_handler = node->Get("handler");
		if (current_handler)
			handler = current_handler;
	}

	if (!handler || (!exact_match && !handler->CanAlsoHandleUrl(request.RequestUrl))) {
		response.SetStatus(404, "Not found");
		response.AddHeader("Content-Type", "text/html");
		String msg = "<h1>Not found</h1>";
		response.WriteBody(msg.CStr(), msg.GetLength());
		response.Finish();
		return;
	}

	handler->HandleRequest(user, request, response);
}