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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
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 * file and include the License file at packager/legal/LICENSE.txt.
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package org.glassfish.jersey.server.internal.routing;

import java.util.List;
import java.util.regex.MatchResult;

import javax.inject.Inject;
import javax.inject.Provider;

import org.glassfish.jersey.server.ContainerRequest;
import org.glassfish.jersey.uri.PathPattern;

/**
 * Matches the un-matched right-hand request path to a configured
 * {@link PathPattern path pattern}.
 *
 * @author Paul Sandoz
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
class PathPatternRouter implements Router {

    /**
     * "Assisted injection" factory interface for {@link PathPatternRouter}.
     *
     * See also 
     * assisted injection in Guice.
     */
    public static class Builder {

        @Inject
        private Provider contextProvider;

        /**
         * Build a path pattern request router.
         *
         * @param routes next-level request pre-processing stages to be returned in case the request
         *               matching in the built router is successful.
         * @return a path pattern request router.
         */
        public PathPatternRouter build(final List> routes) {
            return new PathPatternRouter(contextProvider, routes);
        }
    }

    private final Provider contextProvider;
    private final List> acceptedRoutes;

    /**
     * Constructs route methodAcceptorPair that uses {@link PathPattern} instances for
     * patch matching.
     *
     * @param provider {@link RoutingContext} injection provider.
     * @param routes   next-level request routers to be returned in case the router matching
     *                 the built router is successful.
     */
    private PathPatternRouter(final Provider provider,
                              final List> routes) {

        this.contextProvider = provider;
        this.acceptedRoutes = routes;
    }

    @Override
    public Router.Continuation apply(final ContainerRequest request) {
        final RoutingContext rc = contextProvider.get();
        // Peek at matching information to obtain path to match
        String path = rc.getFinalMatchingGroup();

        for (final Route acceptedRoute : acceptedRoutes) {
            final MatchResult m = acceptedRoute.routingPattern().match(path);
            if (m != null) {
                // Push match result information and rest of path to match
                rc.pushMatchResult(m);
                return Router.Continuation.of(request, acceptedRoute.next());
            }
        }

        // No match
        return Router.Continuation.of(request);
    }
}