// <copyright file="TalkNpcHandlerPlugInBase.cs" company="MUnique">
// Licensed under the MIT License. See LICENSE file in the project root for full license information.
// </copyright>

namespace MUnique.OpenMU.GameServer.MessageHandler;

using MUnique.OpenMU.GameLogic;
using MUnique.OpenMU.GameLogic.NPC;
using MUnique.OpenMU.GameLogic.PlayerActions;
using MUnique.OpenMU.Network.Packets.ClientToServer;

/// <summary>
/// Handler for talk npc request packets.
/// </summary>
internal abstract class TalkNpcHandlerPlugInBase : IPacketHandlerPlugIn
{
    /// <inheritdoc/>
    public virtual bool IsEncryptionExpected => false;

    /// <inheritdoc/>
    public byte Key => TalkToNpcRequest.Code;

    /// <summary>
    /// Gets the talk NPC action.
    /// </summary>
    protected abstract TalkNpcAction TalkNpcAction { get; }

    /// <inheritdoc/>
    public async ValueTask HandlePacketAsync(Player player, Memory<byte> packet)
    {
        TalkToNpcRequest message = packet;

        // ADAMU-CUSTOM: remote NPC ("NPC list" mobile feature). Object id'leri her zaman <= 0x7FFF
        // (GameMap IdGenerator), o yüzden yüksek bit serbest marker. Set edilmişse alt 15 bit bir
        // NPC *definition number*'dır — o NPC'nin penceresini konum/harita bağımsız aç.
        if ((message.NpcId & 0x8000) != 0)
        {
            await this.TalkNpcAction.TalkToNpcByNumberAsync(player, (short)(message.NpcId & 0x7FFF)).ConfigureAwait(false);
            return;
        }
        // ADAMU-CUSTOM end

        if (player.CurrentMap?.GetObject(message.NpcId) is NonPlayerCharacter npc)
        {
            await this.TalkNpcAction.TalkToNpcAsync(player, npc).ConfigureAwait(false);
        }
    }
}