using MetaAssets;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Storage;
using Microsoft.Extensions.Logging;
using ServerBase;
using ServerCommon;

namespace BrokerApiCore;
//=========================================================================================
// 플래닛의 아이템을 칼리버스 재화로 교환하는 주문 생성
// Broker의 rdb(순수 교환 정보)와 DynamoDB(유저의 게임정보)를 사용하여 교환 주문을 생성한다.
// 유저의 게임 정보에서 재화가 차감되면
//=========================================================================================
public class CurrencyExchangeCreationStrategy : IOrderCreationStrategy
{
	private readonly PlanetUserEntity m_planet_user_entity;
	private readonly MetaverseBrokerDbContext m_broker_db_context;
	private readonly PlanetItemExchangeOrderRepo m_planet_item_exchange_repo;
	private readonly PlanetItemExchangeOrderAmountTotalLimitRepo m_planet_item_exchange_order_amount_total_limit;
	private readonly PlanetItemExchangeOrderAmountUserLimitRepo m_planet_item_exchange_order_amount_user_limit;
	private readonly DynamoDbClient m_dynamo_db_client;
	private readonly EchoSystemService m_echo_system_service;
	private readonly ILogger<CurrencyExchangeCreationStrategy>? m_logger;

	public CurrencyExchangeCreationStrategy(
		IServerLogic serverLogic,
		PlanetUserEntity planetUserEntity,
		MetaverseBrokerDbContext brokerDbContext,
		PlanetItemExchangeOrderRepo planetItemExchangeRepo,
		PlanetItemExchangeOrderAmountTotalLimitRepo planetItemExchangeOrderAmountTotalLimit,
		PlanetItemExchangeOrderAmountUserLimitRepo planetItemExchangeOrderAmountUserLimit,
		EchoSystemService echoSystemService,
		ILogger<CurrencyExchangeCreationStrategy>? logger = null!)
	{
		m_planet_user_entity = planetUserEntity;
		m_broker_db_context = brokerDbContext;
		m_planet_item_exchange_repo = planetItemExchangeRepo;
		m_planet_item_exchange_order_amount_total_limit = planetItemExchangeOrderAmountTotalLimit;
		m_planet_item_exchange_order_amount_user_limit = planetItemExchangeOrderAmountUserLimit;
		m_dynamo_db_client = serverLogic.getDynamoDbClient();
		m_echo_system_service = echoSystemService;
		m_logger = logger;
	}

	public async Task<(Result, PlanetItemExchangeOrder)> createOrder(
		PlanetItemExchangeOrder order,
		string planetServerType,
		PlanetItemExchangePolicyMetaData exchangePolicy, CancellationToken cancellationToken = default)
	{
		var exchange_date = DateOnly.FromDateTime(order.CreatedAt.ToUniversalTime());
		var exchange_amount = order.ExchangeMetaAmount;
		var strategy = m_broker_db_context.Database.CreateExecutionStrategy();
		var execute_result = await strategy.ExecuteAsync<Result>(async () =>
		{
			var transaction_result = new Result();
			await using var transaction = await m_broker_db_context.Database.BeginTransactionAsync(cancellationToken);
			try
			{
				var daily_limit_checker = new DailyAmountLimitChecker(
					m_planet_item_exchange_order_amount_total_limit,
					m_planet_item_exchange_order_amount_user_limit);
				var (result, total_limit, user_limit) = await daily_limit_checker.dailyLimitCheck(order, exchangePolicy, cancellationToken);

				// 신규 주문 정보 삽입
				await m_planet_item_exchange_repo.add(order, cancellationToken);
				Guard.Against.resultFail(result);
				Guard.Against.isNull(total_limit, ServerErrorCode.RdbError,
					()=>"PlanetItemExchangeOrderAmountTotalLimit not found");
				Guard.Against.isNull(user_limit, ServerErrorCode.RdbError,
					()=>"PlanetItemExchangeOrderAmountUserLimit not found");

				var (currency_result, _) = await updateCurrency(exchange_amount, exchangePolicy);
				Guard.Against.resultFail(currency_result);

				await m_planet_item_exchange_order_amount_total_limit.increaseDailyAmount(total_limit,
					exchange_amount, cancellationToken);

				await m_planet_item_exchange_order_amount_user_limit.increaseDailyAmount(user_limit,
					exchange_amount, cancellationToken);

				await transaction.CommitAsync(cancellationToken);

				// 사파이어 처리인 경우 에코시스템에 통보
				if (string.Equals(exchangePolicy.CaliverseItemId, CurrencyType.Sapphire.ToString(),
					    StringComparison.OrdinalIgnoreCase))
				{
					var sapphire_delta = exchange_amount * exchangePolicy.CaliverseItemAmount;
					_ = notifyToEchoSystemEvent(planetServerType, sapphire_delta).ConfigureAwait(false);
				}
			}
			catch
			{
				if (transaction.GetDbTransaction().Connection is not null)
				{
					await transaction.RollbackAsync(cancellationToken);
				}

				throw;
			}
			return transaction_result;
		});
		return (execute_result, order);
	}

	private async Task<(Result, long)> updateCurrency(
		int exchangeMetaAmount,
		PlanetItemExchangePolicyMetaData exchangePolicy)
	{
		var currency_delta = exchangeMetaAmount * exchangePolicy.CaliverseItemAmount;
		CurrencyControlHelper.setDbConnector(m_dynamo_db_client);
		var (result, current_sapphire_amount_double) =
			await CurrencyControlHelper.spendMoneyByUserGuid(getUserGuid(), CurrencyType.Sapphire, currency_delta);
		var current_sapphire_amount = Convert.ToInt64(current_sapphire_amount_double);
		return (result, current_sapphire_amount);
	}

	//===========================================================================================
	// 사파이어 처리인 경우 외부에 있는 에코시스템에 이벤트를 통보하여야 한다.
	//===========================================================================================
	private async Task notifyToEchoSystemEvent(
		string planetServerType,
		long sapphireDelta)
	{
		try
		{
			await m_echo_system_service.createAndSetEventPayload(
				accountId: getUserAccountId(),
				nickname: getUserNickname(),
				userGuid: getUserGuid(),
				sapphireDelta,
				planetServerType,
				CaliumEventType.extra_get.ToString()
			);

			_ = await m_echo_system_service.processCaliumEvent(m_planet_user_entity);
		}
		catch (Exception ex)
		{
			m_logger?.LogError(ex, "Failed to process calium event");
			throw;
		}
	}

	private string getUserAccountId() =>
		m_planet_user_entity.getEntityAttributeNotNull<AccountAttribute>().AccountId;

	private string getUserGuid() =>
		m_planet_user_entity.getEntityAttributeNotNull<AccountAttribute>().UserGuid;

	private string getUserNickname() =>
		m_planet_user_entity.getEntityAttributeNotNull<NicknameAttribute>().Nickname;
}