// SPDX-License-Identifier: AGPL-3.0-or-later
// SPDX-FileCopyrightText: 2024 swt23w23
package catering.inventory;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.salespointframework.core.Currencies.EURO;

import java.util.Optional;
import java.util.Set;

import javax.money.MonetaryAmount;
import javax.money.NumberValue;

import org.javamoney.moneta.Money;
import org.junit.jupiter.api.Test;
import org.salespointframework.catalog.Product;
import org.salespointframework.inventory.UniqueInventoryItem;
import org.salespointframework.quantity.Metric;
import org.salespointframework.quantity.Quantity;

import catering.catalog.Consumable;
import catering.catalog.Rentable;
import catering.order.OrderType;
import net.jqwik.api.Arbitraries;
import net.jqwik.api.Arbitrary;
import net.jqwik.api.Assume;
import net.jqwik.api.Combinators;
import net.jqwik.api.ForAll;
import net.jqwik.api.Property;
import net.jqwik.api.Provide;
import net.jqwik.api.constraints.NotBlank;

public class InventoryMutateFormUnitTests {
	/*
	 * Providers for jqwik
	 */

	@Provide
	Arbitrary<MonetaryAmount> euroMonetaryAmount() {
		return Arbitraries.doubles()
				.filter(amount -> amount >= 0)
				.map(amount -> Money.of(amount, EURO));
	}

	@Provide
	Arbitrary<Optional<MonetaryAmount>> optionalEuroMonetaryAmount() {
		return euroMonetaryAmount().optional();
	}

	@Provide
	Arbitrary<Long> positiveOrZero() {
		return Arbitraries.longs().filter(x -> x >= 0);
	}

	@Provide
	Arbitrary<Consumable> consumable() {
		return Combinators
				.combine(Arbitraries.strings().filter(s -> !s.isBlank()), euroMonetaryAmount(), euroMonetaryAmount(),
						optionalEuroMonetaryAmount(), Arbitraries.subsetOf(OrderType.values()),
						Arbitraries.of(Metric.class))
				.as((name, retailPrice, wholesalePrice, promotionPrice, orderTypes, metric) -> new Consumable(name,
						retailPrice, wholesalePrice, promotionPrice, orderTypes, metric));
	}

	@Provide
	Arbitrary<Rentable> rentable() {
		return Combinators
				.combine(Arbitraries.strings().filter(s -> !s.isBlank()), euroMonetaryAmount(), euroMonetaryAmount(),
						Arbitraries.subsetOf(OrderType.values()),
						Arbitraries.of(Metric.class))
				.as((name, retailPrice, wholesalePrice, orderTypes, metric) -> new Rentable(name, retailPrice,
						wholesalePrice, orderTypes, metric));
	}

	Arbitrary<UniqueInventoryItem> item(Arbitrary<? extends Product> product) {
		return Combinators.combine(product, positiveOrZero())
				.as((prod, qty) -> new UniqueInventoryItem(prod, prod.createQuantity(qty)));
	}

	@Provide
	Arbitrary<UniqueInventoryItem> consumableItem() {
		return item(consumable());
	}

	@Provide
	Arbitrary<UniqueInventoryItem> rentableItem() {
		return item(rentable());
	}

	/*
	 * Property-based tests with jqwik
	 */

	@Property
	void property_formToConsumableToFormIsIdentity(@ForAll @NotBlank String name,
			@ForAll("positiveOrZero") long qty,
			@ForAll Metric metric,
			@ForAll("euroMonetaryAmount") MonetaryAmount retailPrice,
			@ForAll("euroMonetaryAmount") MonetaryAmount wholesalePrice,
			@ForAll("optionalEuroMonetaryAmount") Optional<MonetaryAmount> promotionPrice,
			@ForAll Set<OrderType> orderTypes) {
		ConsumableMutateForm form = new ConsumableMutateForm();
		Assume.that(form.supportedMetrics().contains(metric));
		form.setName(name);
		form.setQuantity(qty);
		form.setMetric(metric);
		form.setRetailPrice(retailPrice.getNumber().doubleValueExact());
		form.setWholesalePrice(retailPrice.getNumber().doubleValueExact());
		form.setPromotionPrice(promotionPrice.map(MonetaryAmount::getNumber).map(NumberValue::doubleValueExact));
		form.setOrderTypes(Set.of(OrderType.PARTY_SERVICE));

		Product product = form.toProduct();
		UniqueInventoryItem item = new UniqueInventoryItem(product, product.createQuantity(qty));
		assertThat(ConsumableMutateForm.of(item))
				.usingRecursiveComparison()
				.isEqualTo(form);
	}

	@Property
	void property_formToRentableToFormIsIdentity(@ForAll @NotBlank String name,
			@ForAll("positiveOrZero") long qty,
			@ForAll Metric metric,
			@ForAll("euroMonetaryAmount") MonetaryAmount retailPrice,
			@ForAll("euroMonetaryAmount") MonetaryAmount wholesalePrice,
			@ForAll Set<OrderType> orderTypes) {
		RentableMutateForm form = new RentableMutateForm();
		Assume.that(form.supportedMetrics().contains(metric));
		form.setName(name);
		form.setQuantity(qty);
		form.setMetric(metric);
		form.setRetailPrice(retailPrice.getNumber().doubleValueExact());
		form.setWholesalePrice(retailPrice.getNumber().doubleValueExact());
		form.setOrderTypes(Set.of(OrderType.PARTY_SERVICE));

		Product product = form.toProduct();
		UniqueInventoryItem item = new UniqueInventoryItem(product, product.createQuantity(qty));
		assertThat(RentableMutateForm.of(item))
				.usingRecursiveComparison()
				.isEqualTo(form);
	}

	@Property
	void property_consumableToFormToConsumableIsIdentity(@ForAll("consumableItem") UniqueInventoryItem item) {
		InventoryMutateForm form = InventoryMutateForm.of(item);

		assertThat(form).isInstanceOf(ConsumableMutateForm.class);
		assertThat(form.toProduct())
				.usingRecursiveComparison()
				.ignoringFields("id")
				.isEqualTo(item.getProduct());
		assertThat(form.getQuantity()).isEqualTo(item.getQuantity().getAmount().longValueExact());
	}

	@Property
	void property_rentableToFormToRentableIsIdentity(@ForAll("rentableItem") UniqueInventoryItem item) {
		InventoryMutateForm form = InventoryMutateForm.of(item);

		assertThat(form).isInstanceOf(RentableMutateForm.class);
		assertThat(form.toProduct())
				.usingRecursiveComparison()
				.ignoringFields("id")
				.isEqualTo(item.getProduct());
		assertThat(form.getQuantity()).isEqualTo(item.getQuantity().getAmount().longValueExact());
	}

	@Property
	void property_consumableFormModifiesExistingConsumable(@ForAll("consumableItem") UniqueInventoryItem item,
			@ForAll("consumable") Consumable product) {
		InventoryMutateForm.of(item).modifyProduct(product);

		assertThat(product)
				.usingRecursiveComparison()
				.ignoringFields("id")
				.ignoringFields("metric") // metric can’t be modified (salespoint limitation)
				.isEqualTo(item.getProduct());
	}

	@Property
	void property_rentableFormModifiesExistingConsumable(@ForAll("rentableItem") UniqueInventoryItem item,
			@ForAll("rentable") Rentable product) {
		InventoryMutateForm.of(item).modifyProduct(product);

		assertThat(product)
				.usingRecursiveComparison()
				.ignoringFields("id")
				.ignoringFields("metric") // metric can’t be modified (salespoint limitation)
				.isEqualTo(item.getProduct());
	}

	/*
	 * Edge cases with jqwik
	 */

	@Property
	void property_ofIllegal(@ForAll("consumableItem") UniqueInventoryItem consumableItem,
			@ForAll("rentableItem") UniqueInventoryItem rentableItem) {
		assertThatThrownBy(() -> InventoryMutateForm
				.of(new UniqueInventoryItem(new Product("no subclass", Money.of(0.0, EURO)), Quantity.of(1))))
				.isInstanceOf(IllegalArgumentException.class);

		assertThatThrownBy(() -> ConsumableMutateForm.of(rentableItem))
				.isInstanceOf(IllegalArgumentException.class);

		assertThatThrownBy(() -> RentableMutateForm.of(consumableItem))
				.isInstanceOf(IllegalArgumentException.class);
	}

	@Property
	void property_modifyIllegalProduct(@ForAll("consumableItem") UniqueInventoryItem consumableItem,
			@ForAll("rentableItem") UniqueInventoryItem rentableItem,
			@ForAll("consumable") Consumable consumable,
			@ForAll("rentable") Rentable rentable) {
		assertThatThrownBy(() -> InventoryMutateForm.of(rentableItem).modifyProduct(consumable))
				.isInstanceOf(IllegalArgumentException.class);

		assertThatThrownBy(() -> InventoryMutateForm.of(consumableItem).modifyProduct(rentable))
				.isInstanceOf(IllegalArgumentException.class);
	}

	/*
	 * JUnit Unit tests
	 */
	@Test
	void toConsumable() {
		ConsumableMutateForm form = new ConsumableMutateForm();
		form.setName("Weißwurst (vegan)");
		form.setQuantity(10L);
		form.setMetric(Metric.UNIT);
		form.setRetailPrice(3.46);
		form.setWholesalePrice(1.50);
		form.setPromotionPrice(Optional.of(3.33));
		form.setOrderTypes(Set.of(OrderType.PARTY_SERVICE));
		assertThat(form.getQuantity()).isEqualTo(10L);
		assertThat(form.toProduct())
				.usingRecursiveComparison()
				.ignoringFields("id")
				.isEqualTo(new Consumable("Weißwurst (vegan)", Money.of(3.46, EURO), Money.of(1.50, EURO),
						Optional.of(Money.of(3.33, EURO)), Set.of(OrderType.PARTY_SERVICE), Metric.UNIT));
	}

	@Test
	void toRentable() {
		RentableMutateForm form = new RentableMutateForm();
		form.setName("Kebab-Drehspieß „Der Gerät“ Alkadur");
		form.setQuantity(3L);
		form.setMetric(Metric.UNIT);
		form.setRetailPrice(20.0);
		form.setWholesalePrice(10000.0);
		form.setOrderTypes(Set.of(OrderType.EVENT_CATERING));
		assertThat(form.getQuantity()).isEqualTo(3L);
		assertThat(form.toProduct())
				.usingRecursiveComparison()
				.ignoringFields("id")
				.isEqualTo(new Rentable("Kebab-Drehspieß „Der Gerät“ Alkadur", Money.of(20.0, EURO),
						Money.of(10000.0, EURO), Set.of(OrderType.EVENT_CATERING), Metric.UNIT));
	}

	@Test
	void forProductType() {
		assertThat(InventoryMutateForm.forProductType(Consumable.class)).isInstanceOf(ConsumableMutateForm.class);
		assertThat(InventoryMutateForm.forProductType(Rentable.class)).isInstanceOf(RentableMutateForm.class);

		assertThatThrownBy(() -> InventoryMutateForm.forProductType(Product.class)).isInstanceOf(IllegalArgumentException.class);
	}
}