using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections.Concurrent;


using ServerCore; using ServerBase;
using ServerCommon.Cache;


namespace ServerCommon;


public class PartyServerAttribute : EntityAttributeBase, ICopyEntityAttributeFromCache
{
    private ConcurrentBag<string> m_party_servers { get; set; }= new();

    public PartyServerAttribute(EntityBase owner) : base(owner)
    {
    }
    
    public override async Task<Result> onInit() => await Task.FromResult(new Result());
    
    public override void onClear()
    {
        m_party_servers.Clear();

        getAttributeState().reset();
    }

    public override EntityAttributeBase onCloned()
    {
        var cloned = new PartyServerAttribute(getOwner());

        foreach (var server in m_party_servers)
        {
            cloned.m_party_servers.Add(server);
        }
        
        return cloned;
    }

    public ConcurrentBag<string> getPartyServers() => m_party_servers;

    public void addPartyServer(string server_name) => m_party_servers.Add(server_name);

    public void deleteServer(string delete_server)
    {
        var new_bag = new ConcurrentBag<string>();
        foreach (var server in m_party_servers)
        {
            if (server == delete_server) continue;
            new_bag.Add(server);
        }

        m_party_servers = new_bag;
    }
    
    public bool copyEntityAttributeFromCache(CacheBase? cacheBase)
    {
        var party_server_cache = cacheBase as PartyServerCache;
        if(null == party_server_cache)
        {
            var err_msg = $"Failed to copyEntityAttributeFromCache() !!!, party_cache is null :{nameof(PartyServerCache)}";
            Log.getLogger().error(err_msg);
            return false;
        }

        //=====================================================================================
        // Cache => Attribute
        //=====================================================================================
        m_party_servers.Clear();
        foreach (var server in party_server_cache.PartyServers)
        {
            m_party_servers.Add(server);
        }

        return true;
    }
    
    public bool copyEntityAttributeFromAttribute(PartyServerAttribute from_attribute)
    {
        //=====================================================================================
        // Attribute => Attribute
        //=====================================================================================
        m_party_servers.Clear();
        foreach (var server in from_attribute.getPartyServers())
        {
            m_party_servers.Add(server);
        }

        return true;
    }
    
    public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
    {
        return new PartyServerAttributeTransactor(getOwner());
    }

    public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
    {
        await Task.CompletedTask;

        return (new Result(), null);
    }
}

public class PartyServerAttributeTransactor : EntityAttributeTransactorBase<PartyMemberAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
{
    public PartyServerAttributeTransactor(EntityBase owner) : base(owner) 
    { 
    }

    public bool copyEntityAttributeTransactorFromEntityAttribute(EntityAttributeBase entityAttributeBase)
    {
        string err_msg;

        var copy_from_party_server_attribute = entityAttributeBase as PartyServerAttribute;
        if (null == copy_from_party_server_attribute)
        {
            err_msg = $"Failed to copyEntityAttributeTransactorFromEntityAttribute() !!!, copy_from_party_server_attribute is null :{nameof(PartyServerAttribute)}";
            Log.getLogger().error(err_msg);
            return false;
        }

        var copy_to_party_server_attribute = getClonedEntityAttribute() as PartyServerAttribute;
        if (null == copy_to_party_server_attribute)
        {
            err_msg = $"Failed to copyEntityAttributeTransactorFromEntityAttribute() !!!, copy_to_party_server_attribute is null :{nameof(PartyServerAttribute)}";
            Log.getLogger().error(err_msg);
            return false;
        }

        copy_to_party_server_attribute.copyEntityAttributeFromAttribute(copy_from_party_server_attribute);
        
        return true;
    }
}