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package cdm.event.common.functions;

import cdm.base.math.NonNegativeQuantitySchedule;
import cdm.base.math.UnitType;
import cdm.base.math.metafields.ReferenceWithMetaNonNegativeQuantitySchedule;
import cdm.base.staticdata.party.Counterparty;
import cdm.base.staticdata.party.CounterpartyRoleEnum;
import cdm.base.staticdata.party.Party;
import cdm.base.staticdata.party.PayerReceiver;
import cdm.base.staticdata.party.functions.ExtractCounterpartyByRole;
import cdm.base.staticdata.party.metafields.ReferenceWithMetaParty;
import cdm.event.common.Reset;
import cdm.event.common.Trade;
import cdm.event.common.TradeState;
import cdm.event.common.Transfer;
import cdm.event.common.Transfer.TransferBuilder;
import cdm.observable.asset.Price;
import cdm.product.asset.FixedRateSpecification;
import cdm.product.asset.FloatingRateSpecification;
import cdm.product.asset.InterestRatePayout;
import cdm.product.asset.RateSpecification;
import cdm.product.asset.functions.FixedAmount;
import cdm.product.asset.functions.FloatingAmount;
import cdm.product.asset.metafields.ReferenceWithMetaInterestRatePayout;
import cdm.product.common.settlement.ResolvablePriceQuantity;
import cdm.product.template.TradableProduct;
import com.google.inject.ImplementedBy;
import com.rosetta.model.lib.expression.CardinalityOperator;
import com.rosetta.model.lib.functions.ModelObjectValidator;
import com.rosetta.model.lib.functions.RosettaFunction;
import com.rosetta.model.lib.mapper.Mapper;
import com.rosetta.model.lib.mapper.MapperC;
import com.rosetta.model.lib.mapper.MapperS;
import com.rosetta.model.lib.mapper.MapperUtils;
import com.rosetta.model.lib.records.Date;
import com.rosetta.model.metafields.FieldWithMetaString;
import java.math.BigDecimal;
import java.util.List;
import java.util.Optional;
import javax.inject.Inject;

import static com.rosetta.model.lib.expression.ExpressionOperators.*;

@ImplementedBy(InterestCashSettlementAmount.InterestCashSettlementAmountDefault.class)
public abstract class InterestCashSettlementAmount implements RosettaFunction {
	
	@Inject protected ModelObjectValidator objectValidator;
	
	// RosettaFunction dependencies
	//
	@Inject protected ExtractCounterpartyByRole extractCounterpartyByRole;
	@Inject protected FixedAmount fixedAmount;
	@Inject protected FloatingAmount floatingAmount;

	/**
	* @param tradeState 
	* @param interestRatePayout 
	* @param resets 
	* @param date 
	* @return interestCashSettlementAmount 
	*/
	public Transfer evaluate(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
		Transfer.TransferBuilder interestCashSettlementAmountBuilder = doEvaluate(tradeState, interestRatePayout, resets, date);
		
		final Transfer interestCashSettlementAmount;
		if (interestCashSettlementAmountBuilder == null) {
			interestCashSettlementAmount = null;
		} else {
			interestCashSettlementAmount = interestCashSettlementAmountBuilder.build();
			objectValidator.validate(Transfer.class, interestCashSettlementAmount);
		}
		
		return interestCashSettlementAmount;
	}

	protected abstract Transfer.TransferBuilder doEvaluate(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date);

	protected abstract Mapper performance(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date);

	protected abstract Mapper payer(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date);

	protected abstract Mapper receiver(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date);

	public static class InterestCashSettlementAmountDefault extends InterestCashSettlementAmount {
		@Override
		protected Transfer.TransferBuilder doEvaluate(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
			Transfer.TransferBuilder interestCashSettlementAmount = Transfer.builder();
			return assignOutput(interestCashSettlementAmount, tradeState, interestRatePayout, resets, date);
		}
		
		protected Transfer.TransferBuilder assignOutput(Transfer.TransferBuilder interestCashSettlementAmount, TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
			interestCashSettlementAmount
				.getOrCreateQuantity()
				.setValue(MapperS.of(performance(tradeState, interestRatePayout, resets, date).get()).get());
			
			interestCashSettlementAmount
				.getOrCreateQuantity()
				.getOrCreateUnit()
				.setCurrencyValue(MapperS.of(interestRatePayout).map("getPriceQuantity", payoutBase -> payoutBase.getPriceQuantity()).map("getQuantitySchedule", resolvablePriceQuantity -> resolvablePriceQuantity.getQuantitySchedule()).map("getValue", _f->_f.getValue()).map("getUnit", measureBase -> measureBase.getUnit()).map("getCurrency", unitType -> unitType.getCurrency()).map("getValue", _f->_f.getValue()).get());
			
			interestCashSettlementAmount
				.getOrCreatePayerReceiver()
				.setPayerPartyReferenceValue(MapperUtils.runSinglePolymorphic(() -> {
					if (greaterThanEquals(MapperS.of(performance(tradeState, interestRatePayout, resets, date).get()), MapperS.of(Integer.valueOf(0)), CardinalityOperator.All).getOrDefault(false)) {
						return MapperS.of(payer(tradeState, interestRatePayout, resets, date).get());
					}
					else {
						return MapperS.of(receiver(tradeState, interestRatePayout, resets, date).get());
					}
				}).get());
			
			interestCashSettlementAmount
				.getOrCreatePayerReceiver()
				.setReceiverPartyReferenceValue(MapperUtils.runSinglePolymorphic(() -> {
					if (greaterThanEquals(MapperS.of(performance(tradeState, interestRatePayout, resets, date).get()), MapperS.of(Integer.valueOf(0)), CardinalityOperator.All).getOrDefault(false)) {
						return MapperS.of(receiver(tradeState, interestRatePayout, resets, date).get());
					}
					else {
						return MapperS.of(payer(tradeState, interestRatePayout, resets, date).get());
					}
				}).get());
			
			interestCashSettlementAmount
				.getOrCreateSettlementDate()
				.setAdjustedDateValue(MapperS.of(date).get());
			
			interestCashSettlementAmount
				.getOrCreateSettlementOrigin()
				.setInterestRatePayout(ReferenceWithMetaInterestRatePayout.builder()
					.setGlobalReference(Optional.ofNullable(MapperS.of(interestRatePayout).get())
						.map(r -> r.getMeta())
						.map(m -> m.getGlobalKey())
						.orElse(null))
					.setExternalReference(Optional.ofNullable(MapperS.of(interestRatePayout).get())
						.map(r -> r.getMeta())
						.map(m -> m.getExternalKey())
						.orElse(null))
					.build()
				);
			
			return Optional.ofNullable(interestCashSettlementAmount)
				.map(o -> o.prune())
				.orElse(null);
		}
		
		@Override
		protected Mapper performance(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
			return MapperUtils.runSingle(() -> {
				if (exists(MapperS.of(interestRatePayout).map("getRateSpecification", _interestRatePayout -> _interestRatePayout.getRateSpecification()).map("getFixedRate", rateSpecification -> rateSpecification.getFixedRate())).getOrDefault(false)) {
					return MapperS.of(fixedAmount.evaluate(MapperS.of(interestRatePayout).get(), MapperS.of(interestRatePayout).map("getPriceQuantity", payoutBase -> payoutBase.getPriceQuantity()).map("getQuantitySchedule", resolvablePriceQuantity -> resolvablePriceQuantity.getQuantitySchedule()).map("getValue", _f->_f.getValue()).map("getValue", measureBase -> measureBase.getValue()).get(), MapperS.of(date).get(), null));
				}
				else if (exists(MapperS.of(interestRatePayout).map("getRateSpecification", _interestRatePayout -> _interestRatePayout.getRateSpecification()).map("getFloatingRate", rateSpecification -> rateSpecification.getFloatingRate())).getOrDefault(false)) {
					return MapperS.of(floatingAmount.evaluate(MapperS.of(interestRatePayout).get(), MapperS.of(MapperC.of(resets).get()).map("getResetValue", reset -> reset.getResetValue()).map("getValue", measureBase -> measureBase.getValue()).get(), MapperS.of(interestRatePayout).map("getPriceQuantity", payoutBase -> payoutBase.getPriceQuantity()).map("getQuantitySchedule", resolvablePriceQuantity -> resolvablePriceQuantity.getQuantitySchedule()).map("getValue", _f->_f.getValue()).map("getValue", measureBase -> measureBase.getValue()).get(), MapperS.of(date).get(), null));
				}
				else {
					return MapperS.ofNull();
				}
			});
		}
		
		@Override
		protected Mapper payer(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
			return MapperS.of(extractCounterpartyByRole.evaluate(MapperS.of(tradeState).map("getTrade", _tradeState -> _tradeState.getTrade()).map("getTradableProduct", trade -> trade.getTradableProduct()).mapC("getCounterparty", tradableProduct -> tradableProduct.getCounterparty()).getMulti(), MapperS.of(interestRatePayout).map("getPayerReceiver", payoutBase -> payoutBase.getPayerReceiver()).map("getPayer", payerReceiver -> payerReceiver.getPayer()).get())).map("getPartyReference", counterparty -> counterparty.getPartyReference()).map("getValue", _f->_f.getValue());
		}
		
		@Override
		protected Mapper receiver(TradeState tradeState, InterestRatePayout interestRatePayout, List resets, Date date) {
			return MapperS.of(extractCounterpartyByRole.evaluate(MapperS.of(tradeState).map("getTrade", _tradeState -> _tradeState.getTrade()).map("getTradableProduct", trade -> trade.getTradableProduct()).mapC("getCounterparty", tradableProduct -> tradableProduct.getCounterparty()).getMulti(), MapperS.of(interestRatePayout).map("getPayerReceiver", payoutBase -> payoutBase.getPayerReceiver()).map("getReceiver", payerReceiver -> payerReceiver.getReceiver()).get())).map("getPartyReference", counterparty -> counterparty.getPartyReference()).map("getValue", _f->_f.getValue());
		}
	}
}