/*
 * 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 OpenSimulator 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;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using OpenMetaverse;
using OpenSim.Framework;
using System.Reflection;
using System.Text;
using log4net;
using Npgsql;
using NpgsqlTypes;

namespace OpenSim.Data.PGSQL
{
    public class PGSQLXInventoryData : IXInventoryData
    {
//        private static readonly ILog m_log = LogManager.GetLogger(
//                MethodBase.GetCurrentMethod().DeclaringType);

        private PGSQLFolderHandler m_Folders;
        private PGSQLItemHandler m_Items;

        public PGSQLXInventoryData(string conn, string realm)
        {
            m_Folders = new PGSQLFolderHandler(
                    conn, "inventoryfolders", "InventoryStore");
            m_Items = new PGSQLItemHandler(
                    conn, "inventoryitems", String.Empty);
        }

        public static UUID str2UUID(string strUUID)
        {
            UUID newUUID = UUID.Zero;

            UUID.TryParse(strUUID, out newUUID);

            return newUUID;
        }

        public XInventoryFolder[] GetFolders(string[] fields, string[] vals)
        {
            return m_Folders.Get(fields, vals);
        }

        public XInventoryItem[] GetItems(string[] fields, string[] vals)
        {
            return m_Items.Get(fields, vals);
        }

        public bool StoreFolder(XInventoryFolder folder)
        {
            if (folder.folderName.Length > 64)
                folder.folderName = folder.folderName.Substring(0, 64);
            return m_Folders.Store(folder);
        }

        public bool StoreItem(XInventoryItem item)
        {
            if (item.inventoryName.Length > 64)
                item.inventoryName = item.inventoryName.Substring(0, 64);
            if (item.inventoryDescription.Length > 128)
                item.inventoryDescription = item.inventoryDescription.Substring(0, 128);

            return m_Items.Store(item);
        }

        public bool DeleteFolders(string field, string val)
        {
            return m_Folders.Delete(field, val);
        }

        public bool DeleteFolders(string[] fields, string[] vals)
        {
            return m_Folders.Delete(fields, vals);
        }

        public bool DeleteItems(string field, string val)
        {
            return m_Items.Delete(field, val);
        }

        public bool DeleteItems(string[] fields, string[] vals)
        {
            return m_Items.Delete(fields, vals);
        }

        public bool MoveItem(string id, string newParent)
        {
            return m_Items.MoveItem(id, newParent);
        }

        public bool MoveFolder(string id, string newParent)
        {
            return m_Folders.MoveFolder(id, newParent);
        }

        public XInventoryItem[] GetActiveGestures(UUID principalID)
        {
            return m_Items.GetActiveGestures(principalID.ToString());
        }

        public int GetAssetPermissions(UUID principalID, UUID assetID)
        {
            return m_Items.GetAssetPermissions(principalID, assetID);
        }
    }

    public class PGSQLItemHandler : PGSQLInventoryHandler<XInventoryItem>
    {
        public PGSQLItemHandler(string c, string t, string m) :
            base(c, t, m)
        {
        }

        public bool MoveItem(string id, string newParent)
        {
            XInventoryItem[] retrievedItems = Get(new string[] { "inventoryID" }, new string[] { id });
            if (retrievedItems.Length == 0)
                return false;

            UUID oldParent = retrievedItems[0].parentFolderID;

            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand())
                {
                    cmd.CommandText = String.Format(@"update {0} set ""parentFolderID"" = :ParentFolderID where ""inventoryID"" = :InventoryID", m_Realm);
                    cmd.Parameters.Add(m_database.CreateParameter("ParentFolderID", newParent));
                    cmd.Parameters.Add(m_database.CreateParameter("InventoryID", id ));
                    cmd.Connection = conn;
                    conn.Open();

                    if (cmd.ExecuteNonQuery() == 0)
                        return false;
                }
            }

            IncrementFolderVersion(oldParent);
            IncrementFolderVersion(newParent);

            return true;
        }

        public XInventoryItem[] GetActiveGestures(string principalID)
        {
            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand())
                {
                    cmd.CommandText = String.Format(@"select * from inventoryitems where ""avatarID"" = :uuid and ""assetType"" = :type and ""flags"" = 1", m_Realm);

                    UUID princID = UUID.Zero;
                    UUID.TryParse(principalID, out princID);

                    cmd.Parameters.Add(m_database.CreateParameter("uuid", principalID));
                    cmd.Parameters.Add(m_database.CreateParameter("type", (int)AssetType.Gesture));
                    cmd.Connection = conn;
                    conn.Open();
                    return DoQuery(cmd);
                }
            }
        }

        public int GetAssetPermissions(UUID principalID, UUID assetID)
        {
            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand())
                {
                    cmd.CommandText = String.Format(@"select bit_or(""inventoryCurrentPermissions"") as ""inventoryCurrentPermissions"" 
                                 from inventoryitems 
                                 where ""avatarID"" = :PrincipalID 
                                   and ""assetID"" = :AssetID 
                                 group by ""assetID"" ", m_Realm);

                    cmd.Parameters.Add(m_database.CreateParameter("PrincipalID", principalID));
                    cmd.Parameters.Add(m_database.CreateParameter("AssetID", assetID));
                    cmd.Connection = conn;
                    conn.Open();
                    using (NpgsqlDataReader reader = cmd.ExecuteReader())
                    {

                        int perms = 0;

                        if (reader.Read())
                        {
                            perms = Convert.ToInt32(reader["inventoryCurrentPermissions"]);
                        }

                        return perms;
                    }

                }
            }
        }

        public override bool Store(XInventoryItem item)
        {
            if (!base.Store(item))
                return false;

            IncrementFolderVersion(item.parentFolderID);

            return true;
        }
    }

    public class PGSQLFolderHandler : PGSQLInventoryHandler<XInventoryFolder>
    {
        public PGSQLFolderHandler(string c, string t, string m) :
            base(c, t, m)
        {
        }

        public bool MoveFolder(string id, string newParentFolderID)
        {
            XInventoryFolder[] folders = Get(new string[] { "folderID" }, new string[] { id });

            if (folders.Length == 0)
                return false;

            UUID oldParentFolderUUID = folders[0].parentFolderID;

            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand())
                {
                    UUID foldID = UUID.Zero;
                    UUID.TryParse(id, out foldID);

                    UUID newPar = UUID.Zero;
                    UUID.TryParse(newParentFolderID, out newPar);

                    cmd.CommandText = String.Format(@"update {0} set ""parentFolderID"" = :ParentFolderID where ""folderID"" = :folderID", m_Realm);
                    cmd.Parameters.Add(m_database.CreateParameter("ParentFolderID", newPar));
                    cmd.Parameters.Add(m_database.CreateParameter("folderID", foldID));
                    cmd.Connection = conn;
                    conn.Open();

                    if (cmd.ExecuteNonQuery() == 0)
                        return false;
                }
            }

            IncrementFolderVersion(oldParentFolderUUID);
            IncrementFolderVersion(newParentFolderID);

            return true;
        }

        public override bool Store(XInventoryFolder folder)
        {
            if (!base.Store(folder))
                return false;

            IncrementFolderVersion(folder.parentFolderID);

            return true;
        }
    }

    public class PGSQLInventoryHandler<T> : PGSQLGenericTableHandler<T> where T: class, new()
    {
        public PGSQLInventoryHandler(string c, string t, string m) : base(c, t, m) {}

        protected bool IncrementFolderVersion(UUID folderID)
        {
            return IncrementFolderVersion(folderID.ToString());
        }

        protected bool IncrementFolderVersion(string folderID)
        {
//            m_log.DebugFormat("[PGSQL ITEM HANDLER]: Incrementing version on folder {0}", folderID);
//            Util.PrintCallStack();

            string sql = @"update inventoryfolders set version=version+1 where ""folderID"" = :folderID";

            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand(sql, conn))
                {
                    UUID foldID = UUID.Zero;
                    UUID.TryParse(folderID, out foldID);

                    conn.Open();

                    cmd.Parameters.Add( m_database.CreateParameter("folderID", foldID) );

                    try
                    {
                        cmd.ExecuteNonQuery();
                    }
                    catch (Exception)
                    {
                        return false;
                    }
                }
            }

            return true;
        }
    }
}