/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   http://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.apache.maven.internal.impl;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;

import org.apache.maven.api.Session;
import org.apache.maven.api.Toolchain;
import org.apache.maven.api.services.ToolchainManager;
import org.apache.maven.api.services.ToolchainManagerException;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.toolchain.DefaultToolchainManagerPrivate;
import org.apache.maven.toolchain.MisconfiguredToolchainException;
import org.apache.maven.toolchain.ToolchainPrivate;

@Named
@Singleton
public class DefaultToolchainManager implements ToolchainManager {
    private final DefaultToolchainManagerPrivate toolchainManagerPrivate;

    @Inject
    public DefaultToolchainManager(DefaultToolchainManagerPrivate toolchainManagerPrivate) {
        this.toolchainManagerPrivate = toolchainManagerPrivate;
    }

    @Override
    public List<Toolchain> getToolchains(Session session, String type, Map<String, String> requirements)
            throws ToolchainManagerException {
        MavenSession s = ((DefaultSession) session).getMavenSession();
        List<org.apache.maven.toolchain.Toolchain> toolchains =
                toolchainManagerPrivate.getToolchains(s, type, requirements);
        return new MappedList<>(toolchains, this::toToolchain);
    }

    @Override
    public Optional<Toolchain> getToolchainFromBuildContext(Session session, String type)
            throws ToolchainManagerException {
        MavenSession s = ((DefaultSession) session).getMavenSession();
        return Optional.ofNullable(toolchainManagerPrivate.getToolchainFromBuildContext(type, s))
                .map(this::toToolchain);
    }

    @Override
    public List<Toolchain> getToolchainsForType(Session session, String type) throws ToolchainManagerException {
        try {
            MavenSession s = ((DefaultSession) session).getMavenSession();
            ToolchainPrivate[] toolchains = toolchainManagerPrivate.getToolchainsForType(type, s);
            return new MappedList<>(Arrays.asList(toolchains), this::toToolchain);
        } catch (MisconfiguredToolchainException e) {
            throw new ToolchainManagerException("Unable to get toochains for type " + type, e);
        }
    }

    @Override
    public void storeToolchainToBuildContext(Session session, Toolchain toolchain) throws ToolchainManagerException {
        MavenSession s = ((DefaultSession) session).getMavenSession();
        org.apache.maven.toolchain.ToolchainPrivate tc =
                (org.apache.maven.toolchain.ToolchainPrivate) ((ToolchainWrapper) toolchain).toolchain;
        toolchainManagerPrivate.storeToolchainToBuildContext(tc, s);
    }

    private Toolchain toToolchain(org.apache.maven.toolchain.Toolchain toolchain) {
        return new ToolchainWrapper(toolchain);
    }

    private static class ToolchainWrapper implements Toolchain {
        private final org.apache.maven.toolchain.Toolchain toolchain;

        ToolchainWrapper(org.apache.maven.toolchain.Toolchain toolchain) {
            this.toolchain = toolchain;
        }

        @Override
        public String getType() {
            return toolchain.getType();
        }

        @Override
        public String findTool(String toolName) {
            return toolchain.findTool(toolName);
        }

        @Override
        public boolean matchesRequirements(Map<String, String> requirements) {
            return ((ToolchainPrivate) toolchain).matchesRequirements(requirements);
        }
    }
}
