/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.keycloak.services.resources;

import org.keycloak.Config;
import org.keycloak.common.Version;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.core.Response;
import java.io.InputStream;

/**
 * Get keycloak.js file for javascript clients
 *
 * @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
 */
@Path("/js")
public class JsResource {

    /**
     * Get keycloak.js file for javascript clients
     *
     * @return
     */
    @GET
    @Path("/keycloak.js")
    @Produces("text/javascript")
    public Response getKeycloakJs() {
        return getJs("keycloak.js");
    }

    @GET
    @Path("/{version}/keycloak.js")
    @Produces("text/javascript")
    public Response getKeycloakJsWithVersion(@PathParam("version") String version) {
        if (!version.equals(Version.RESOURCES_VERSION)) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }

        return getKeycloakJs();
    }

    @GET
    @Path("/keycloak.min.js")
    @Produces("text/javascript")
    public Response getKeycloakMinJs() {
        return getJs("keycloak.min.js");
    }

    @GET
    @Path("/{version}/keycloak.min.js")
    @Produces("text/javascript")
    public Response getKeycloakMinJsWithVersion(@PathParam("version") String version) {
        if (!version.equals(Version.RESOURCES_VERSION)) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }

        return getKeycloakMinJs();
    }

    /**
     * Get keycloak-authz.js file for javascript clients
     *
     * @return
     */
    @GET
    @Path("/keycloak-authz.js")
    @Produces("text/javascript")
    public Response getKeycloakAuthzJs() {
        return getJs("keycloak-authz.js");
    }

    @GET
    @Path("/{version}/keycloak-authz.js")
    @Produces("text/javascript")
    public Response getKeycloakAuthzJsWithVersion(@PathParam("version") String version) {
        if (!version.equals(Version.RESOURCES_VERSION)) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }

        return getKeycloakAuthzJs();
    }

    @GET
    @Path("/keycloak-authz.min.js")
    @Produces("text/javascript")
    public Response getKeycloakAuthzMinJs() {
        return getJs("keycloak-authz.min.js");
    }

    @GET
    @Path("/{version}/keycloak-authz.min.js")
    @Produces("text/javascript")
    public Response getKeycloakAuthzMinJsWithVersion(@PathParam("version") String version) {
        if (!version.equals(Version.RESOURCES_VERSION)) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }

        return getKeycloakAuthzMinJs();
    }

    private Response getJs(String name) {
        InputStream inputStream = getClass().getClassLoader().getResourceAsStream(name);
        if (inputStream != null) {
            CacheControl cacheControl = new CacheControl();
            cacheControl.setNoTransform(false);
            cacheControl.setMaxAge(Config.scope("theme").getInt("staticMaxAge", -1));

            return Response.ok(inputStream).type("text/javascript").cacheControl(cacheControl).build();
        } else {
            return Response.status(Response.Status.NOT_FOUND).build();
        }
    }
}
