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/*
 *
 *                         _ _        ____  ____
 *               _____   _(_) |_ __ _|  _ \| __ )
 *              / _ \ \ / / | __/ _` | | | |  _ \
 *             |  __/\ V /| | || (_| | |_| | |_) |
 *              \___| \_/ |_|\__\__,_|____/|____/
 *
 *   Copyright (c) 2023
 *
 *   Licensed under the Business Source License, Version 1.1 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   https://github.com/FgForrest/evitaDB/blob/master/LICENSE
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

package io.evitadb.api.requestResponse.schema.mutation.attribute;

import io.evitadb.api.exception.InvalidSchemaMutationException;
import io.evitadb.api.requestResponse.schema.AttributeSchemaContract;
import io.evitadb.api.requestResponse.schema.CatalogSchemaContract;
import io.evitadb.api.requestResponse.schema.EntityAttributeSchemaContract;
import io.evitadb.api.requestResponse.schema.EntitySchemaContract;
import io.evitadb.api.requestResponse.schema.GlobalAttributeSchemaContract;
import io.evitadb.api.requestResponse.schema.ReferenceSchemaContract;
import io.evitadb.api.requestResponse.schema.builder.InternalSchemaBuilderHelper.MutationCombinationResult;
import io.evitadb.api.requestResponse.schema.dto.AttributeSchema;
import io.evitadb.api.requestResponse.schema.dto.EntityAttributeSchema;
import io.evitadb.api.requestResponse.schema.dto.EntitySchemaProvider;
import io.evitadb.api.requestResponse.schema.dto.GlobalAttributeSchema;
import io.evitadb.api.requestResponse.schema.mutation.CatalogSchemaMutation;
import io.evitadb.api.requestResponse.schema.mutation.CombinableCatalogSchemaMutation;
import io.evitadb.api.requestResponse.schema.mutation.CombinableEntitySchemaMutation;
import io.evitadb.api.requestResponse.schema.mutation.EntitySchemaMutation;
import io.evitadb.api.requestResponse.schema.mutation.LocalCatalogSchemaMutation;
import io.evitadb.utils.Assert;
import lombok.EqualsAndHashCode;
import lombok.Getter;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import javax.annotation.concurrent.ThreadSafe;
import java.io.Serial;

/**
 * Mutation is responsible for renaming an existing {@link AttributeSchemaContract} in {@link EntitySchemaContract}
 * or {@link GlobalAttributeSchemaContract} in {@link CatalogSchemaContract}.
 * Mutation can be used for altering also the existing {@link AttributeSchemaContract} or
 * {@link GlobalAttributeSchemaContract} alone.
 * Mutation implements {@link CombinableEntitySchemaMutation} allowing to resolve conflicts with the same mutation
 * if the mutation is placed twice in the mutation pipeline.
 *
 * @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2022
 */
@ThreadSafe
@Immutable
@EqualsAndHashCode
public class ModifyAttributeSchemaNameMutation
	implements EntityAttributeSchemaMutation, GlobalAttributeSchemaMutation, ReferenceAttributeSchemaMutation,
				CombinableEntitySchemaMutation, CombinableCatalogSchemaMutation, CatalogSchemaMutation {
	@Serial private static final long serialVersionUID = -9180398601079510531L;
	@Nonnull @Getter private final String name;
	@Getter @Nonnull private final String newName;

	public ModifyAttributeSchemaNameMutation(@Nonnull String name, @Nonnull String newName) {
		this.name = name;
		this.newName = newName;
	}

	@Nullable
	@Override
	public MutationCombinationResult combineWith(@Nonnull CatalogSchemaContract currentCatalogSchema, @Nonnull LocalCatalogSchemaMutation existingMutation) {
		if (existingMutation instanceof ModifyAttributeSchemaNameMutation theExistingMutation && name.equals(theExistingMutation.getName())) {
			return new MutationCombinationResult<>(null, this);
		} else {
			return null;
		}
	}

	@Nullable
	@Override
	public MutationCombinationResult combineWith(@Nonnull CatalogSchemaContract currentCatalogSchema, @Nonnull EntitySchemaContract currentEntitySchema, @Nonnull EntitySchemaMutation existingMutation) {
		if (existingMutation instanceof ModifyAttributeSchemaNameMutation theExistingMutation && name.equals(theExistingMutation.getName())) {
			return new MutationCombinationResult<>(null, this);
		} else {
			return null;
		}
	}

	@Nonnull
	@Override
	public  S mutate(@Nullable CatalogSchemaContract catalogSchema, @Nullable S attributeSchema, @Nonnull Class schemaType) {
		Assert.isPremiseValid(attributeSchema != null, "Attribute schema is mandatory!");
		if (attributeSchema instanceof GlobalAttributeSchema globalAttributeSchema) {
			//noinspection unchecked,rawtypes
			return (S) GlobalAttributeSchema._internalBuild(
				newName,
				globalAttributeSchema.getDescription(),
				globalAttributeSchema.getDeprecationNotice(),
				globalAttributeSchema.getUniquenessType(),
				globalAttributeSchema.getGlobalUniquenessType(),
				globalAttributeSchema.isFilterable(),
				globalAttributeSchema.isSortable(),
				globalAttributeSchema.isLocalized(),
				globalAttributeSchema.isNullable(),
				globalAttributeSchema.isRepresentative(),
				(Class) globalAttributeSchema.getType(),
				globalAttributeSchema.getDefaultValue(),
				globalAttributeSchema.getIndexedDecimalPlaces()
			);
		} else if (attributeSchema instanceof EntityAttributeSchema entityAttributeSchema) {
			//noinspection unchecked,rawtypes
			return (S) EntityAttributeSchema._internalBuild(
				newName,
				entityAttributeSchema.getDescription(),
				entityAttributeSchema.getDeprecationNotice(),
				entityAttributeSchema.getUniquenessType(),
				entityAttributeSchema.isFilterable(),
				entityAttributeSchema.isSortable(),
				entityAttributeSchema.isLocalized(),
				entityAttributeSchema.isNullable(),
				entityAttributeSchema.isRepresentative(),
				(Class)entityAttributeSchema.getType(),
				entityAttributeSchema.getDefaultValue(),
				entityAttributeSchema.getIndexedDecimalPlaces()
			);
		} else {
			//noinspection unchecked,rawtypes
			return (S) AttributeSchema._internalBuild(
				newName,
				attributeSchema.getDescription(),
				attributeSchema.getDeprecationNotice(),
				attributeSchema.getUniquenessType(),
				attributeSchema.isFilterable(),
				attributeSchema.isSortable(),
				attributeSchema.isLocalized(),
				attributeSchema.isNullable(),
				(Class) attributeSchema.getType(),
				attributeSchema.getDefaultValue(),
				attributeSchema.getIndexedDecimalPlaces()
			);
		}
	}

	@Nullable
	@Override
	public CatalogSchemaWithImpactOnEntitySchemas mutate(@Nullable CatalogSchemaContract catalogSchema, @Nonnull EntitySchemaProvider entitySchemaAccessor) {
		Assert.isPremiseValid(catalogSchema != null, "Catalog schema is mandatory!");
		final GlobalAttributeSchemaContract existingAttributeSchema = catalogSchema.getAttribute(name)
			.orElseThrow(() -> new InvalidSchemaMutationException(
				"The attribute `" + name + "` is not defined in catalog `" + catalogSchema.getName() + "` schema!"
			));

		final GlobalAttributeSchemaContract updatedAttributeSchema = mutate(catalogSchema, existingAttributeSchema, GlobalAttributeSchemaContract.class);
		return replaceAttributeIfDifferent(
			catalogSchema, existingAttributeSchema, updatedAttributeSchema, entitySchemaAccessor, this
		);
	}

	@Nonnull
	@Override
	public EntitySchemaContract replaceAttributeIfDifferent(@Nonnull EntitySchemaContract entitySchema, @Nonnull AttributeSchemaContract existingAttributeSchema, @Nonnull EntityAttributeSchemaContract updatedAttributeSchema) {
		return EntityAttributeSchemaMutation.super.replaceAttributeIfDifferent(entitySchema, existingAttributeSchema, updatedAttributeSchema);
	}

	@Nullable
	@Override
	public EntitySchemaContract mutate(@Nonnull CatalogSchemaContract catalogSchema, @Nullable EntitySchemaContract entitySchema) {
		Assert.isPremiseValid(entitySchema != null, "Entity schema is mandatory!");
		final EntityAttributeSchemaContract existingAttributeSchema = entitySchema.getAttribute(name)
			.orElseThrow(() -> new InvalidSchemaMutationException(
				"The attribute `" + name + "` is not defined in entity `" + entitySchema.getName() + "` schema!"
			));

		final EntityAttributeSchemaContract updatedAttributeSchema = mutate(catalogSchema, existingAttributeSchema, EntityAttributeSchemaContract.class);
		return replaceAttributeIfDifferent(
			entitySchema, existingAttributeSchema, updatedAttributeSchema
		);
	}

	@Nullable
	@Override
	public ReferenceSchemaContract mutate(@Nonnull EntitySchemaContract entitySchema, @Nullable ReferenceSchemaContract referenceSchema) {
		Assert.isPremiseValid(referenceSchema != null, "Reference schema is mandatory!");
		final AttributeSchemaContract existingAttributeSchema = referenceSchema.getAttribute(name)
			.orElseThrow(() -> new InvalidSchemaMutationException(
				"The attribute `" + name + "` is not defined in entity `" + entitySchema.getName() +
					"` schema for reference with name `" + referenceSchema.getName() + "`!"
			));

		final AttributeSchemaContract updatedAttributeSchema = mutate(null, existingAttributeSchema, AttributeSchemaContract.class);
		return replaceAttributeIfDifferent(
			referenceSchema, existingAttributeSchema, updatedAttributeSchema
		);
	}

	@Override
	public String toString() {
		return "Modify attribute `" + name + "` schema: " +
			"newName='" + newName + '\'';
	}
}