/*
 * Copyright 2021 - 2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 org.springframework.rewrite.resource.finder;

import org.openrewrite.SourceFile;
import org.springframework.rewrite.resource.ProjectResourceSet;
import org.springframework.rewrite.resource.RewriteSourceFileHolder;

import java.nio.file.Path;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

public class AbsolutePathResourcesFinder
		implements ProjectResourceFinder<List<RewriteSourceFileHolder<? extends SourceFile>>> {

	private final Set<Path> absoluteResourcePaths;

	public AbsolutePathResourcesFinder(List<Path> absoluteResourcePaths) {
		this(new HashSet<>(absoluteResourcePaths));
	}

	public AbsolutePathResourcesFinder(Path... absoluteResourcePath) {
		this(Arrays.asList(absoluteResourcePath));
	}

	public AbsolutePathResourcesFinder(Path absoluteResourcePath) {
		this(Set.of(absoluteResourcePath));
	}

	public AbsolutePathResourcesFinder(Set<Path> absoluteResourcePaths) {
		String invalidPaths = absoluteResourcePaths.stream()
			.filter(absoluteResourcePath -> absoluteResourcePath == null || !absoluteResourcePath.isAbsolute())
			.map(p -> {
				if (p == null) {
					return "null";
				}
				else {
					return p.toString();
				}
			})
			.collect(Collectors.joining("', '"));

		if (invalidPaths != null) {
			throw new IllegalArgumentException("Given paths '" + invalidPaths + "' were not absolute");
		}

		this.absoluteResourcePaths = absoluteResourcePaths.stream().map(Path::normalize).collect(Collectors.toSet());
	}

	@Override
	public List<RewriteSourceFileHolder<? extends SourceFile>> apply(ProjectResourceSet projectResourceSet) {
		return projectResourceSet.stream()
			.filter(r -> absoluteResourcePaths.contains(r.getAbsolutePath()))
			.collect(Collectors.toList());
	}

}
