/*
 *  Copyright (C) 2014 Stichting Akvo (Akvo Foundation)
 *
 *  This file is part of Akvo FLOW.
 *
 *  Akvo FLOW is free software: you can redistribute it and modify it under the terms of
 *  the GNU Affero General Public License (AGPL) as published by the Free Software Foundation,
 *  either version 3 of the License or any later version.
 *
 *  Akvo FLOW 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 Affero General Public License included below for more details.
 *
 *  The full license text can also be seen at <http://www.gnu.org/licenses/agpl.html>.
 */

package org.waterforpeople.mapping.app.web;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.waterforpeople.mapping.dao.DeviceApplicationDao;
import org.waterforpeople.mapping.domain.DeviceApplication;

public class ApkRedirectServlet extends HttpServlet {

    private static final long serialVersionUID = 8394168365501522124L;
    private static final String ANDROID = "androidPhone";
    private static final String FIELDSURVEY = "fieldSurvey";
    private static final String FLOWAPP = "flowapp";
    private static final String SATSTAT = "satStat";
    private static final String GPS_APP_PATH = "/gps";
    private static final String FLOW_APP_PATH = "/app";
    private static final String FLOW_APP2_PATH = "/app2";

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
            IOException {
        final DeviceApplicationDao dao = new DeviceApplicationDao();
        String servletPath = req.getServletPath();
        String appCode = "";

        if (FLOW_APP_PATH.equals(servletPath)) {
            appCode = FIELDSURVEY;
        } else if (FLOW_APP2_PATH.equals(servletPath)) {
            appCode = FLOWAPP;
        } else if (GPS_APP_PATH.equals(servletPath)) {
            appCode = SATSTAT;
        }

        final List<DeviceApplication> apps = dao
                .listByDeviceTypeAndAppCode(ANDROID, appCode, 1);
        if (apps == null
                || apps.size() == 0
                || StringUtils.isBlank(apps.get(0).getFileName())) {
            resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
            resp.getWriter().append("NOT FOUND");
            return;
        }

        resp.sendRedirect(apps.get(0).getFileName());
    }
}