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


using NeoSmart.AsyncLock;


using ServerCore; using ServerBase;


using MASTER_GUID = System.String;


namespace ServerBase;

public class EntityTransactionRunnerWithScopLock : IDisposable
{
    private readonly EntityBase m_owner;
    private readonly MASTER_GUID m_transact_master_guid;

    public EntityTransactionRunnerWithScopLock(EntityBase owner, string transactMasterGuid = "")
    {
        m_owner = owner;

        m_transact_master_guid = transactMasterGuid;
    }

    public void Dispose()
    {
        if (m_transact_master_guid.isNullOrWhiteSpace())
        {
            return;
        }

        var master_guid = m_owner.getMasterGuid();
        if (m_transact_master_guid != master_guid)
        {
            Log.getLogger().error($"Not matched MasterGuid !!! - attachedMasterGuid:{master_guid} == settedMasterGuid:{m_transact_master_guid}");
            return;
        }

        m_owner.detachMasterGuid();
    }

    public async Task<T> tryInvokeWithAsyncLock<T>(Func<Task<T>> func)
    {
        var owner = getOwner();
        NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

        var result = default(T);
        var err_msg = string.Empty;

        using (var releaser = await m_owner.getAsyncLock())
        {
            err_msg = $"AsyncLock() Start !!! - {m_owner.toBasicString()}";
            Log.getLogger().debug(err_msg);

            if(false == m_transact_master_guid.isNullOrWhiteSpace())
            {
                ConditionValidCheckHelper.throwIfFalseWithCondition( () => true == m_owner.attachMasterGuid(m_transact_master_guid)
                                                                   , () => $"Failed to attach Master !!! : transactMasterGuid:{m_transact_master_guid} - {owner.toBasicString()}");
            }
             
            result = await func();

            err_msg = $"AsyncLock() End !!! - {m_owner.toBasicString()}";
            Log.getLogger().debug(err_msg);
        }

        return result;
    }

    public EntityBase getOwner() => m_owner;
}