/*
 * Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

using Framework.Constants;
using Framework.Dynamic;
using Game.Entities;
using System;
using System.Collections.Generic;
using System.Numerics;

namespace Game.Networking.Packets
{
    // CMSG_BANKER_ACTIVATE
    // CMSG_BINDER_ACTIVATE
    // CMSG_BINDER_CONFIRM
    // CMSG_GOSSIP_HELLO
    // CMSG_LIST_INVENTORY
    // CMSG_TRAINER_LIST
    // CMSG_BATTLEMASTER_HELLO
    public class Hello : ClientPacket
    {
        public Hello(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            Unit = _worldPacket.ReadPackedGuid();
        }

        public ObjectGuid Unit;
    }

    public class GossipMessagePkt : ServerPacket
    {
        public GossipMessagePkt() : base(ServerOpcodes.GossipMessage) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(GossipGUID);
            _worldPacket.WriteUInt32(GossipID);
            _worldPacket.WriteInt32(FriendshipFactionID);
            _worldPacket.WriteInt32(TextID);

            _worldPacket.WriteInt32(GossipOptions.Count);
            _worldPacket.WriteInt32(GossipText.Count);

            foreach (ClientGossipOptions options in GossipOptions)
            {
                _worldPacket.WriteInt32(options.ClientOption);
                _worldPacket.WriteUInt8((byte)options.OptionNPC);
                _worldPacket.WriteUInt8(options.OptionFlags);
                _worldPacket.WriteInt32(options.OptionCost);
                _worldPacket.WriteUInt32(options.OptionLanguage);

                _worldPacket.WriteBits(options.Text.GetByteCount(), 12);
                _worldPacket.WriteBits(options.Confirm.GetByteCount(), 12);
                _worldPacket.WriteBits((byte)options.Status, 2);
                _worldPacket.WriteBit(options.SpellID.HasValue);
                _worldPacket.FlushBits();

                options.Treasure.Write(_worldPacket);

                _worldPacket.WriteString(options.Text);
                _worldPacket.WriteString(options.Confirm);

                if (options.SpellID.HasValue)
                    _worldPacket.WriteInt32(options.SpellID.Value);
            }

            foreach (ClientGossipText text in GossipText)
                text.Write(_worldPacket);
        }

        public List<ClientGossipOptions> GossipOptions = new();
        public int FriendshipFactionID;
        public ObjectGuid GossipGUID;
        public List<ClientGossipText> GossipText = new();
        public int TextID;
        public uint GossipID;
    }

    public class GossipSelectOption : ClientPacket
    {
        public GossipSelectOption(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            GossipUnit = _worldPacket.ReadPackedGuid();
            GossipID = _worldPacket.ReadUInt32();
            GossipIndex = _worldPacket.ReadUInt32();

            uint length = _worldPacket.ReadBits<uint>(8);
            PromotionCode = _worldPacket.ReadString(length);
        }

        public ObjectGuid GossipUnit;
        public uint GossipIndex;
        public uint GossipID;
        public string PromotionCode;
    }

    public class GossipComplete : ServerPacket
    {
        public bool SuppressSound;

        public GossipComplete() : base(ServerOpcodes.GossipComplete) { }

        public override void Write()
        {
            _worldPacket.WriteBit(SuppressSound);
            _worldPacket.FlushBits();
        }
    }

    public class VendorInventory : ServerPacket
    {
        public VendorInventory() : base(ServerOpcodes.VendorInventory, ConnectionType.Instance) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(Vendor);
            _worldPacket.WriteUInt8(Reason);
            _worldPacket.WriteInt32(Items.Count);

            foreach (VendorItemPkt item in Items)
                item.Write(_worldPacket);
        }

        public byte Reason = 0;
        public List<VendorItemPkt> Items = new();
        public ObjectGuid Vendor;
    }

    public class TrainerList : ServerPacket
    {
        public TrainerList() : base(ServerOpcodes.TrainerList, ConnectionType.Instance) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(TrainerGUID);
            _worldPacket.WriteInt32(TrainerType);
            _worldPacket.WriteInt32(TrainerID);

            _worldPacket.WriteInt32(Spells.Count);
            foreach (TrainerListSpell spell in Spells)
            {
                _worldPacket.WriteUInt32(spell.SpellID);
                _worldPacket.WriteUInt32(spell.MoneyCost);
                _worldPacket.WriteUInt32(spell.ReqSkillLine);
                _worldPacket.WriteUInt32(spell.ReqSkillRank);

                for (uint i = 0; i < SharedConst.MaxTrainerspellAbilityReqs; ++i)
                    _worldPacket.WriteUInt32(spell.ReqAbility[i]);

                _worldPacket.WriteUInt8((byte)spell.Usable);
                _worldPacket.WriteUInt8(spell.ReqLevel);
            }

            _worldPacket.WriteBits(Greeting.GetByteCount(), 11);
            _worldPacket.FlushBits();
            _worldPacket.WriteString(Greeting);
        }

        public ObjectGuid TrainerGUID;
        public int TrainerType;
        public int TrainerID = 1;
        public List<TrainerListSpell> Spells = new();
        public string Greeting;
    }

    public class ShowBank : ServerPacket
    {
        public ShowBank() : base(ServerOpcodes.ShowBank, ConnectionType.Instance) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(Guid);
        }

        public ObjectGuid Guid;
    }

    public class PlayerTabardVendorActivate : ServerPacket
    {
        public PlayerTabardVendorActivate() : base(ServerOpcodes.PlayerTabardVendorActivate) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(Vendor);
        }

        public ObjectGuid Vendor;
    }

    class GossipPOI : ServerPacket
    {
        public GossipPOI() : base(ServerOpcodes.GossipPoi) { }

        public override void Write()
        {
            _worldPacket.WriteUInt32(Id);
            _worldPacket.WriteVector3(Pos);
            _worldPacket.WriteUInt32(Icon);
            _worldPacket.WriteUInt32(Importance);
            _worldPacket.WriteUInt32(WMOGroupID);
            _worldPacket.WriteBits(Flags, 14);
            _worldPacket.WriteBits(Name.GetByteCount(), 6);
            _worldPacket.FlushBits();
            _worldPacket.WriteString(Name);
        }

        public uint Id;
        public uint Flags;
        public Vector3 Pos;
        public uint Icon;
        public uint Importance;
        public uint WMOGroupID;
        public string Name;
    }

    class SpiritHealerActivate : ClientPacket
    {
        public SpiritHealerActivate(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            Healer = _worldPacket.ReadPackedGuid();
        }

        public ObjectGuid Healer;
    }

    public class SpiritHealerConfirm : ServerPacket
    {
        public SpiritHealerConfirm() : base(ServerOpcodes.SpiritHealerConfirm) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(Unit);
        }

        public ObjectGuid Unit;
    }

    class TrainerBuySpell : ClientPacket
    {
        public TrainerBuySpell(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            TrainerGUID = _worldPacket.ReadPackedGuid();
            TrainerID = _worldPacket.ReadUInt32();
            SpellID= _worldPacket.ReadUInt32();
        }

        public ObjectGuid TrainerGUID;
        public uint TrainerID;
        public uint SpellID;
    }

    class TrainerBuyFailed : ServerPacket
    {
        public TrainerBuyFailed() : base(ServerOpcodes.TrainerBuyFailed) { }

        public override void Write()
        {
            _worldPacket.WritePackedGuid(TrainerGUID);
            _worldPacket.WriteUInt32(SpellID);
            _worldPacket.WriteUInt32((uint)TrainerFailedReason);
        }

        public ObjectGuid TrainerGUID;
        public uint SpellID;
        public TrainerFailReason TrainerFailedReason;
    }

    class RequestStabledPets : ClientPacket
    {
        public RequestStabledPets(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            StableMaster = _worldPacket.ReadPackedGuid();
        }

        public ObjectGuid StableMaster;
    }

    class SetPetSlot : ClientPacket
    {
        public SetPetSlot(WorldPacket packet) : base(packet) { }

        public override void Read()
        {
            PetNumber = _worldPacket.ReadUInt32();
            DestSlot = _worldPacket.ReadUInt8();
            StableMaster = _worldPacket.ReadPackedGuid();
        }

        public ObjectGuid StableMaster;
        public uint PetNumber;
        public byte DestSlot;
    }
    
    //Structs
    public struct TreasureItem
    {
        public GossipOptionRewardType Type;
        public int ID;
        public int Quantity;

        public void Write(WorldPacket data)
        {
            data.WriteBits((byte)Type, 1);
            data.WriteInt32(ID);
            data.WriteInt32(Quantity);
        }
    }

    public class TreasureLootList
    {
        public List<TreasureItem> Items = new();

        public void Write(WorldPacket data)
        {
            data.WriteInt32(Items.Count);
            foreach (TreasureItem treasureItem in Items)
                treasureItem.Write(data);
        }
    }

    public class ClientGossipOptions
    {
        public int ClientOption;
        public GossipOptionNpc OptionNPC;
        public byte OptionFlags;
        public int OptionCost;
        public uint OptionLanguage;
        public GossipOptionStatus Status;
        public string Text;
        public string Confirm;
        public TreasureLootList Treasure = new();
        public int? SpellID;
    }

    public class ClientGossipText
    {
        public uint QuestID;
        public uint ContentTuningID;
        public int QuestType;
        public bool Repeatable;
        public string QuestTitle;
        public uint QuestFlags;
        public uint QuestFlagsEx;

        public void Write(WorldPacket data)
        {
            data.WriteUInt32(QuestID);
            data.WriteUInt32(ContentTuningID);
            data.WriteInt32(QuestType);
            data.WriteUInt32(QuestFlags);
            data.WriteUInt32(QuestFlagsEx);

            data.WriteBit(Repeatable);
            data.WriteBits(QuestTitle.GetByteCount(), 9);
            data.FlushBits();

            data.WriteString(QuestTitle);
        }
    }

    public class VendorItemPkt
    {
        public void Write(WorldPacket data)
        {
            data.WriteInt32(MuID);
            data.WriteInt32(Type);
            data.WriteInt32(Quantity);
            data.WriteUInt64(Price);
            data.WriteInt32(Durability);
            data.WriteInt32(StackCount);
            data.WriteInt32(ExtendedCostID);
            data.WriteInt32(PlayerConditionFailed);
            Item.Write(data);
            data.WriteBit(Locked);
            data.WriteBit(DoNotFilterOnVendor);
            data.WriteBit(Refundable);
            data.FlushBits();
        }

        public int MuID;
        public int Type;
        public ItemInstance Item = new();
        public int Quantity = -1;
        public ulong Price;
        public int Durability;
        public int StackCount;
        public int ExtendedCostID;
        public int PlayerConditionFailed;
        public bool Locked;
        public bool DoNotFilterOnVendor;
        public bool Refundable;
    }

    public class TrainerListSpell
    {
        public uint SpellID;
        public uint MoneyCost;
        public uint ReqSkillLine;
        public uint ReqSkillRank;
        public uint[] ReqAbility = new uint[SharedConst.MaxTrainerspellAbilityReqs];
        public TrainerSpellState Usable;
        public byte ReqLevel;
    }
}