/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSim Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System.Collections.Generic;
using libsecondlife;

namespace OpenSim.Framework
{
    /// <summary>
    /// An interface for connecting to user storage servers.
    /// </summary>
    public interface IUserData
    {
        /// <summary>
        /// Returns a user profile from a database via their UUID
        /// </summary>
        /// <param name="user">The user's UUID</param>
        /// <returns>The user data profile.  Returns null if no user is found</returns>
        UserProfileData GetUserByUUID(LLUUID user);

        /// <summary>
        /// Returns a users profile by searching their username parts
        /// </summary>
        /// <param name="fname">Account firstname</param>
        /// <param name="lname">Account lastname</param>
        /// <returns>The user data profile</returns>
        UserProfileData GetUserByName(string fname, string lname);

        /// <summary>
        /// Returns a list of UUIDs firstnames and lastnames that match string query entered into the avatar picker.
        /// </summary>
        /// <param name="queryID">ID associated with the user's query. This must match what the client sent</param>
        /// <param name="query">The filtered contents of the search box when the user hit search.</param>
        /// <returns>The user data profile</returns>
        List<AvatarPickerAvatar> GeneratePickerResults(LLUUID queryID, string query);

        /// <summary>
        /// Returns the current agent for a user searching by it's UUID
        /// </summary>
        /// <param name="user">The users UUID</param>
        /// <returns>The current agent session</returns>
        UserAgentData GetAgentByUUID(LLUUID user);

        /// <summary>
        /// Returns the current session agent for a user searching by username
        /// </summary>
        /// <param name="name">The users account name</param>
        /// <returns>The current agent session</returns>
        UserAgentData GetAgentByName(string name);

        /// <summary>
        /// Returns the current session agent for a user searching by username parts
        /// </summary>
        /// <param name="fname">The users first account name</param>
        /// <param name="lname">The users account surname</param>
        /// <returns>The current agent session</returns>
        UserAgentData GetAgentByName(string fname, string lname);

        /// <summary>
        /// Stores new web-login key for user during web page login
        /// </summary>
        /// <param name="webLoginKey"></param>
        void StoreWebLoginKey(LLUUID agentID, LLUUID webLoginKey);

        /// <summary>
        /// Adds a new User profile to the database 
        /// </summary>
        /// <param name="user">UserProfile to add</param>
        void AddNewUserProfile(UserProfileData user);

        /// <summary>
        ///  Updates an existing user profile
        /// </summary>
        /// <param name="user">UserProfile to update</param>
        bool UpdateUserProfile(UserProfileData user);

        /// <summary>
        ///  Updates the current region the User is in
        /// </summary>
        /// <param name="avatarid">User Region the Avatar is IN</param>
        /// <param name="retionuuid">User Region the Avatar is IN</param>
        void UpdateUserCurrentRegion(LLUUID avatarid, LLUUID regionuuid);

        /// <summary>
        /// Adds a new agent to the database
        /// </summary>
        /// <param name="agent">The agent to add</param>
        void AddNewUserAgent(UserAgentData agent);

        /// <summary>
        /// Adds a new friend to the database for XUser
        /// </summary>
        /// <param name="friendlistowner">The agent that who's friends list is being added to</param>
        /// <param name="friend">The agent that being added to the friends list of the friends list owner</param>
        /// <param name="perms">A uint bit vector for set perms that the friend being added has; 0 = none, 1=This friend can see when they sign on, 2 = map, 4 edit objects </param>
        void AddNewUserFriend(LLUUID friendlistowner, LLUUID friend, uint perms);

        /// <summary>
        /// Delete friend on friendlistowner's friendlist.
        /// </summary>
        /// <param name="friendlistowner">The agent that who's friends list is being updated</param>
        /// <param name="friend">The Ex-friend agent</param>
        void RemoveUserFriend(LLUUID friendlistowner, LLUUID friend);

        /// <summary>
        /// Update permissions for friend on friendlistowner's friendlist.
        /// </summary>
        /// <param name="friendlistowner">The agent that who's friends list is being updated</param>
        /// <param name="friend">The agent that is getting or loosing permissions</param>
        /// <param name="perms">A uint bit vector for set perms that the friend being added has; 0 = none, 1=This friend can see when they sign on, 2 = map, 4 edit objects </param>
        void UpdateUserFriendPerms(LLUUID friendlistowner, LLUUID friend, uint perms);

        /// <summary>
        /// Returns a list of FriendsListItems that describe the friends and permissions in the friend relationship for LLUUID friendslistowner
        /// </summary>
        /// <param name="friendlistowner">The agent that we're retreiving the friends Data.</param>
        List<FriendListItem> GetUserFriendList(LLUUID friendlistowner);

        /// <summary>
        /// Attempts to move currency units between accounts (NOT RELIABLE / TRUSTWORTHY. DONT TRY RUN YOUR OWN CURRENCY EXCHANGE WITH REAL VALUES)
        /// </summary>
        /// <param name="from">The account to transfer from</param>
        /// <param name="to">The account to transfer to</param>
        /// <param name="amount">The amount to transfer</param>
        /// <returns>Successful?</returns>
        bool MoneyTransferRequest(LLUUID from, LLUUID to, uint amount);

        /// <summary>
        /// Attempts to move inventory between accounts, if inventory is copyable it will be copied into the target account.
        /// </summary>
        /// <param name="from">User to transfer from</param>
        /// <param name="to">User to transfer to</param>
        /// <param name="inventory">Specified inventory item</param>
        /// <returns>Successful?</returns>
        bool InventoryTransferRequest(LLUUID from, LLUUID to, LLUUID inventory);

        /// <summary>
        /// Returns the plugin version
        /// </summary>
        /// <returns>Plugin version in MAJOR.MINOR.REVISION.BUILD format</returns>
        string GetVersion();

        /// <summary>
        /// Returns the plugin name
        /// </summary>
        /// <returns>Plugin name, eg MySQL User Provider</returns>
        string getName();

        /// <summary>
        /// Initialises the plugin (artificial constructor)
        /// </summary>
        void Initialise();

        /// <summary>
        /// Gets the user appearance
        /// </summer>
        UserAppearance GetUserAppearance(LLUUID user);

        void UpdateUserAppearance(LLUUID user, UserAppearance appearance);
        
        
        void AddAttachment(LLUUID user, LLUUID item);
        void RemoveAttachment(LLUUID user, LLUUID item);
        List<LLUUID> GetAttachments(LLUUID user);
    }
}