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package cdm.event.common.functions;

import cdm.base.math.UnitType;
import cdm.base.math.functions.Abs;
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.observable.asset.PriceSchedule;
import cdm.observable.asset.metafields.FieldWithMetaPriceSchedule;
import cdm.product.asset.functions.ResolveEquityInitialPrice;
import cdm.product.common.settlement.PriceQuantity;
import cdm.product.template.ContractualProduct;
import cdm.product.template.EconomicTerms;
import cdm.product.template.Payout;
import cdm.product.template.PerformancePayout;
import cdm.product.template.Product;
import cdm.product.template.TradableProduct;
import cdm.product.template.TradeLot;
import cdm.product.template.metafields.ReferenceWithMetaPerformancePayout;
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.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.Optional;
import javax.inject.Inject;

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

@ImplementedBy(EquityCashSettlementAmount.EquityCashSettlementAmountDefault.class)
public abstract class EquityCashSettlementAmount implements RosettaFunction {
	
	@Inject protected ModelObjectValidator objectValidator;
	
	// RosettaFunction dependencies
	//
	@Inject protected Abs abs;
	@Inject protected EquityPerformance equityPerformance0;
	@Inject protected ExtractCounterpartyByRole extractCounterpartyByRole;
	@Inject protected ResolveCashSettlementDate resolveCashSettlementDate;
	@Inject protected ResolveEquityInitialPrice resolveEquityInitialPrice;

	/**
	* @param tradeState 
	* @param date 
	* @return equityCashSettlementAmount 
	*/
	public Transfer evaluate(TradeState tradeState, Date date) {
		Transfer.TransferBuilder equityCashSettlementAmountBuilder = doEvaluate(tradeState, date);
		
		final Transfer equityCashSettlementAmount;
		if (equityCashSettlementAmountBuilder == null) {
			equityCashSettlementAmount = null;
		} else {
			equityCashSettlementAmount = equityCashSettlementAmountBuilder.build();
			objectValidator.validate(Transfer.class, equityCashSettlementAmount);
		}
		
		return equityCashSettlementAmount;
	}

	protected abstract Transfer.TransferBuilder doEvaluate(TradeState tradeState, Date date);

	protected abstract Mapper equityPerformancePayout(TradeState tradeState, Date date);

	protected abstract Mapper equityPerformance1(TradeState tradeState, Date date);

	protected abstract Mapper payer(TradeState tradeState, Date date);

	protected abstract Mapper receiver(TradeState tradeState, Date date);

	public static class EquityCashSettlementAmountDefault extends EquityCashSettlementAmount {
		@Override
		protected Transfer.TransferBuilder doEvaluate(TradeState tradeState, Date date) {
			Transfer.TransferBuilder equityCashSettlementAmount = Transfer.builder();
			return assignOutput(equityCashSettlementAmount, tradeState, date);
		}
		
		protected Transfer.TransferBuilder assignOutput(Transfer.TransferBuilder equityCashSettlementAmount, TradeState tradeState, Date date) {
			equityCashSettlementAmount
				.getOrCreateQuantity()
				.setValue(MapperS.of(abs.evaluate(MapperS.of(equityPerformance1(tradeState, date).get()).get())).get());
			
			equityCashSettlementAmount
				.getOrCreateQuantity()
				.getOrCreateUnit()
				.setCurrencyValue(MapperS.of(resolveEquityInitialPrice.evaluate(MapperS.of(MapperS.of(tradeState).map("getTrade", _tradeState -> _tradeState.getTrade()).map("getTradableProduct", trade -> trade.getTradableProduct()).mapC("getTradeLot", tradableProduct -> tradableProduct.getTradeLot()).get()).mapC("getPriceQuantity", tradeLot -> tradeLot.getPriceQuantity()).mapC("getPrice", priceQuantity -> priceQuantity.getPrice()).map("getValue", _f->_f.getValue()).getMulti())).map("getUnit", measureBase -> measureBase.getUnit()).map("getCurrency", unitType -> unitType.getCurrency()).map("getValue", _f->_f.getValue()).get());
			
			equityCashSettlementAmount
				.getOrCreatePayerReceiver()
				.setPayerPartyReferenceValue(MapperUtils.runSinglePolymorphic(() -> {
					if (greaterThanEquals(MapperS.of(equityPerformance1(tradeState, date).get()), MapperS.of(Integer.valueOf(0)), CardinalityOperator.All).getOrDefault(false)) {
						return MapperS.of(payer(tradeState, date).get());
					}
					else {
						return MapperS.of(receiver(tradeState, date).get());
					}
				}).get());
			
			equityCashSettlementAmount
				.getOrCreatePayerReceiver()
				.setReceiverPartyReferenceValue(MapperUtils.runSinglePolymorphic(() -> {
					if (greaterThanEquals(MapperS.of(equityPerformance1(tradeState, date).get()), MapperS.of(Integer.valueOf(0)), CardinalityOperator.All).getOrDefault(false)) {
						return MapperS.of(receiver(tradeState, date).get());
					}
					else {
						return MapperS.of(payer(tradeState, date).get());
					}
				}).get());
			
			equityCashSettlementAmount
				.getOrCreateSettlementDate()
				.setAdjustedDateValue(MapperS.of(resolveCashSettlementDate.evaluate(MapperS.of(tradeState).get())).get());
			
			equityCashSettlementAmount
				.getOrCreateSettlementOrigin()
				.setPerformancePayout(ReferenceWithMetaPerformancePayout.builder()
					.setGlobalReference(Optional.ofNullable(MapperS.of(equityPerformancePayout(tradeState, date).get()).get())
						.map(r -> r.getMeta())
						.map(m -> m.getGlobalKey())
						.orElse(null))
					.setExternalReference(Optional.ofNullable(MapperS.of(equityPerformancePayout(tradeState, date).get()).get())
						.map(r -> r.getMeta())
						.map(m -> m.getExternalKey())
						.orElse(null))
					.build()
				);
			
			return Optional.ofNullable(equityCashSettlementAmount)
				.map(o -> o.prune())
				.orElse(null);
		}
		
		@Override
		protected Mapper equityPerformancePayout(TradeState tradeState, Date date) {
			return MapperS.of(MapperS.of(tradeState).map("getTrade", _tradeState -> _tradeState.getTrade()).map("getTradableProduct", trade -> trade.getTradableProduct()).map("getProduct", tradableProduct -> tradableProduct.getProduct()).map("getContractualProduct", product -> product.getContractualProduct()).map("getEconomicTerms", contractualProduct -> contractualProduct.getEconomicTerms()).map("getPayout", economicTerms -> economicTerms.getPayout()).mapC("getPerformancePayout", payout -> payout.getPerformancePayout()).get());
		}
		
		@Override
		protected Mapper equityPerformance1(TradeState tradeState, Date date) {
			return MapperS.of(equityPerformance0.evaluate(MapperS.of(tradeState).map("getTrade", _tradeState -> _tradeState.getTrade()).get(), MapperS.of(MapperS.of(tradeState).mapC("getResetHistory", _tradeState -> _tradeState.getResetHistory()).get()).map("getResetValue", reset -> reset.getResetValue()).get(), MapperS.of(date).get()));
		}
		
		@Override
		protected Mapper payer(TradeState tradeState, 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(equityPerformancePayout(tradeState, date).get()).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, 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(equityPerformancePayout(tradeState, date).get()).map("getPayerReceiver", payoutBase -> payoutBase.getPayerReceiver()).map("getReceiver", payerReceiver -> payerReceiver.getReceiver()).get())).map("getPartyReference", counterparty -> counterparty.getPartyReference()).map("getValue", _f->_f.getValue());
		}
	}
}