// -*- mode: c++; c-basic-offset:4 -*-

// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.

// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: Jose Garcia <jgarcia@ucar.edu>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.

// (c) COPYRIGHT URI/MIT 2001-2002
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
//         jose  Jose Garcia <jgarcia@ucar.edu>

#ifndef _rc_reader_h_
#define _rc_reader_h_

#include <iostream>
#include <string>

#include "Error.h"
#include "util.h"

using namespace std;

namespace libdap
{

/** Read the .dodsrc file. By default the file ~/.dodsrc is read. If the
    environment variable DODS_CONF is set, use that value as the pathname to
    the configuration file. Else, if the environment variable DODS_CACHE_INIT
    is set, use that value.

    NB: DODS_CACHE_INIT is deprecated and may be removed in the future.

    @author Jose Garcia <jgarcia@ucar.edu> */
class RCReader
{
private:
    string d_rc_file_path;
    string d_cache_root;

    bool _dods_use_cache; // 0- Disabled 1- Enabled
    unsigned int _dods_cache_max; // Max cache size in Mbytes
    unsigned int _dods_cached_obj; // Max cache entry size in Mbytes
    int _dods_ign_expires; // 0- Honor expires 1- Ignore them

    // NB: NEVER_DEFLATE: I added this (12/1/99 jhrg) because libwww 5.2.9
    // cannot process compressed (i.e., deflated) documents in the cache.
    // Users must be able to choose whether they want compressed data that
    // will always be refreshed or uncompressed data that will be cached.
    // When set this flag overrides the value passed into the Connect
    // object's constructor. This gives users control over the value.
    // Previously, this could only be set by the program that called
    // Connect(...). Note that I've now (4/6/2000 jhrg) fixed libwww so this
    // parameter is no longer needed.111
    //
    // Added back in, but with a better name (removed double negative).
    // 6/27/2002 jhrg
    bool _dods_deflate;  // 1- request comp responses, 0- don't

    int _dods_default_expires; // 24 hours in seconds
    int _dods_always_validate; // Let libwww decide by default so set to 0

    // flags for PROXY_SERVER=<protocol>,<host url>
    string d_dods_proxy_server_protocol;
    string d_dods_proxy_server_host;
    int d_dods_proxy_server_port;
    string d_dods_proxy_server_userpw;

    // Should libcurl validate SSL hosts/certificates"
    int d_validate_ssl;

    string _dods_proxy_server_host_url; // deprecated

    // The proxy-for stuff is all deprecated. 06/17/04 jhrg
    // flags for PROXY_FOR=<regex>,<proxy host url>,<flags>
    bool _dods_proxy_for; // true if proxy_for is used.
    string _dods_proxy_for_regexp;
    string _dods_proxy_for_proxy_host_url;
    int _dods_proxy_for_regexp_flags; // not used w/libcurl. 6/27/2002 jhrg

    //flags for NO_PROXY_FOR=<protocol>,<host>,<port>
    bool d_dods_no_proxy_for; // true if no_proxy_for is used.
    string d_dods_no_proxy_for_protocol;
    string d_dods_no_proxy_for_host;
    int _dods_no_proxy_for_port; // not used w/libcurl. 6/27/2002 jhrg

    // Make this a vector of strings or support a PATH-style list. 02/26/03
    // jhrg
    string d_ais_database;

    string d_cookie_jar;

    static RCReader* _instance;

    RCReader();
    ~RCReader();

    // File I/O methods
    bool write_rc_file(const string &pathname);
    bool read_rc_file(const string &pathname);

    // Look for the RC file
    string check_env_var(const string &variable_name);
    string check_string(string env_var);

    static void initialize_instance();
    static void delete_instance();

    friend class RCReaderTest;
    friend class HTTPConnectTest;

public:
    static RCReader* instance();
#if 0
    static RCReader* instance(const string &rc_file_path);
#endif
    // GET METHODS
    string get_dods_cache_root() const throw()
    {
        return d_cache_root;
    }
    bool get_use_cache() const throw()
    {
        return _dods_use_cache;
    }
    int get_max_cache_size()  const throw()
    {
        return _dods_cache_max;
    }
    unsigned int get_max_cached_obj() const throw()
    {
        return _dods_cached_obj;
    }
    int get_ignore_expires() const throw()
    {
        return _dods_ign_expires;
    }
    int get_default_expires() const throw()
    {
        return _dods_default_expires;
    }
    int get_always_validate() const throw()
    {
        return _dods_always_validate;
    }
    int get_validate_ssl() const throw()
    {
        return d_validate_ssl;
    }

    bool get_deflate() const throw()
    {
        return _dods_deflate;
    }

    /// Get the proxy server protocol
    string get_proxy_server_protocol() const throw()
    {
        return d_dods_proxy_server_protocol;
    }
    /// Get the proxy host
    string get_proxy_server_host() const throw()
    {
        return d_dods_proxy_server_host;
    }
    /// Get the proxy port
    int get_proxy_server_port() const throw()
    {
        return d_dods_proxy_server_port;
    }
    /// Get the proxy username and password
    string get_proxy_server_userpw() const throw()
    {
        return d_dods_proxy_server_userpw;
    }
    /// @deprecated
    string get_proxy_server_host_url() const throw()
    {
        return (d_dods_proxy_server_userpw.empty() ? "" : d_dods_proxy_server_userpw + "@")
               + d_dods_proxy_server_host
               + ":" + long_to_string(d_dods_proxy_server_port);
    }

    // The whole regex/proxy-for implementation needs reworking. We really
    // need a vector of structs which hold the information on a set of regexes
    // and matching proxies. Then in the code that derefs a URL, we should
    // check to see if the URL matches any of the regexs, et cetera. I'm
    // going to disable the entire feature and see if anyone complains. If
    // they do, we can fix it. If not, one less thing to do... 06/17/04 jhrg
    /// @deprecated
    bool is_proxy_for_used() throw()
    {
        return _dods_proxy_for;
    }
    /// @deprecated
    string get_proxy_for_regexp() const throw()
    {
        return _dods_proxy_for_regexp;
    }
    /// @deprecated
    string get_proxy_for_proxy_host_url() const throw()
    {
        return _dods_proxy_for_proxy_host_url;
    }

    /// @deprecated
    int get_proxy_for_regexp_flags() const throw()
    {
        return _dods_proxy_for_regexp_flags;
    }

    // The whole no_proxy implementation also needs a rewrite. However, it is
    // useful as it is since the user can give a domain and there's often a
    // real need for suppressing proxy access for the local domain. The
    // ..._port() method is bogus, however, so it is deprecated. There's no
    // code that uses it. 06/17/04 jhrg
    bool is_no_proxy_for_used() throw()
    {
        return d_dods_no_proxy_for;
    }
    string get_no_proxy_for_protocol() const throw()
    {
        return d_dods_no_proxy_for_protocol;
    }
    string get_no_proxy_for_host() const throw()
    {
        return d_dods_no_proxy_for_host;
    }

    /// @deprecated
    int    get_no_proxy_for_port() const throw()
    {
        return _dods_no_proxy_for_port;
    }

    string get_ais_database() const throw()
    {
        return d_ais_database;
    }

    string get_cookie_jar() const throw()
    {
	return d_cookie_jar;
    }

    // SET METHODS
    void set_use_cache(bool b) throw()
    {
        _dods_use_cache = b;
    }
    void set_max_cache_size(int i) throw()
    {
        _dods_cache_max = i;
    }
    void set_max_cached_obj(int i) throw()
    {
        _dods_cached_obj = i;
    }
    void set_ignore_expires(int i) throw()
    {
        _dods_ign_expires = i;
    }
    void set_default_expires(int i) throw()
    {
        _dods_default_expires = i;
    }
    void set_always_validate(int i) throw()
    {
        _dods_always_validate = i;
    }
    void set_validate_ssl(int i) throw()
    {
        d_validate_ssl = i;
    }

    void set_deflate(bool b) throw()
    {
        _dods_deflate = b;
    }

    void set_proxy_server_protocol(const string &s) throw()
    {
        d_dods_proxy_server_protocol = s;
    }
    void set_proxy_server_host(const string &s) throw()
    {
        d_dods_proxy_server_host = s;
    }
    void set_proxy_server_port(int l) throw()
    {
        d_dods_proxy_server_port = l;
    }
    void set_proxy_server_userpw(const string &s) throw()
    {
        d_dods_proxy_server_userpw = s;
    }

    /// @deprecated
    void set_proxy_server_host_url(const string &s) throw()
    {
        _dods_proxy_server_host_url = s;
    }

    /// @deprecated
    void set_proxy_for_regexp(const string &s) throw()
    {
        _dods_proxy_for_regexp = s;
    }
    /// @deprecated
    void set_proxy_for_proxy_host_url(const string &s) throw()
    {
        _dods_proxy_for_proxy_host_url = s;
    }
    /// @deprecated
    void set_proxy_for_regexp_flags(int i) throw()
    {
        _dods_proxy_for_regexp_flags = i;
    }

    void set_no_proxy_for_protocol(const string &s) throw()
    {
        d_dods_no_proxy_for_protocol = s;
    }
    void set_no_proxy_for_host(const string &s) throw()
    {
        d_dods_no_proxy_for_host = s;
    }

    /// @deprecated
    void set_no_proxy_for_port(int i) throw()
    {
        _dods_no_proxy_for_port = i;
    }

    void set_ais_database(const string &db) throw()
    {
        d_ais_database = db;
    }
};

} // namespace libdap

#endif // _RCReader_h_