//  Copyright (C) 2015, The Duplicati Team

//  http://www.duplicati.com, info@duplicati.com
//
//  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using Duplicati.Server.Serialization.Interface;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;

namespace Duplicati.Server.Database
{
    public class Backup : IBackup
    {
        // Sensitive information that may be stored in TargetUrl
        private readonly string[] UrlPasswords = {
            "authid",
            "auth-password",
            "sia-password",
            "tardigrade-secret",
            "tardigrade-shared-access",
        };

        // Sensitive information that may be stored in Settings
        private readonly string[] SettingPasswords = {
            "passphrase",
            "--authid",
            "--send-mail-password",
            "--send-xmpp-password",
        };

        public Backup()
        {
            this.ID = null;
        }
        
        internal void LoadChildren(Connection con)
        {
            if (this.IsTemporary)
            {
                this.Sources = new string[0];
                this.Settings = new ISetting[0];
                this.Filters = new IFilter[0];
                this.Metadata = new Dictionary<string, string>();
            }
            else
            {
                var id = long.Parse(this.ID);
                this.Sources = con.GetSources(id);
                this.Settings = con.GetSettings(id);
                this.Filters = con.GetFilters(id);
                this.Metadata = con.GetMetadata(id);
            }
        }
    
        /// <summary>
        /// The backup ID
        /// </summary>
        public string ID { get; set; }
        /// <summary>
        /// The backup name
        /// </summary>
        public string Name { get; set; }
        /// <summary>
        /// The backup description
        /// </summary>
        public string Description { get; set; }
        /// <summary>
        /// The backup tags
        /// </summary>
        public string[] Tags { get; set; }
        /// <summary>
        /// The backup target url
        /// </summary>
        public string TargetURL { get; set; }
        /// <summary>
        /// The path to the local database
        /// </summary>
        public string DBPath { get; internal set; }
                
        /// <summary>
        /// The backup source folders and files
        /// </summary>
        public string[] Sources { get; set; }
        
        /// <summary>
        /// The backup settings
        /// </summary>
        public ISetting[] Settings { get; set; }
        
        /// <summary>
        /// The filters applied to the source files
        /// </summary>
        public IFilter[] Filters { get; set; }
        
        /// <summary>
        /// The backup metadata
        /// </summary>
        public IDictionary<string, string> Metadata { get; set; }        
        
        /// <summary>
        /// Gets a value indicating if this instance is not persisted to the database
        /// </summary>        
        public bool IsTemporary { get { return ID != null && ID.IndexOf("-", StringComparison.Ordinal) > 0; } }

        /// <summary>
        /// Sanitizes the backup TargetUrl from any fields in the PasswordFields list.
        /// </summary>
        public void SanitizeTargetUrl()
        {
            var url = new Duplicati.Library.Utility.Uri(this.TargetURL);
            NameValueCollection filteredParameters = new NameValueCollection();
            if (url.Query != null)
            {
                // We cannot use url.QueryParameters since it contains decoded parameter values, which
                // breaks assumptions made by the decode_uri function in AppUtils.js.  Since we are simply
                // removing password parameters, we will leave the parameters as they are in the target URL.
                filteredParameters = Library.Utility.Uri.ParseQueryString(url.Query, false);
                foreach (string field in this.UrlPasswords)
                {
                    filteredParameters.Remove(field);
                }
            }
            url = url.SetQuery(Duplicati.Library.Utility.Uri.BuildUriQuery(filteredParameters));
            this.TargetURL = url.ToString();
        }

        /// <summary>
        /// Sanitizes the settings from any fields in the PasswordFields list.
        /// </summary>
        public void SanitizeSettings()
        {
            this.Settings = this.Settings.Where((setting) => !SettingPasswords.Contains(setting.Name)).ToArray();
        }
    }
}