/*
 *  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
 *
 *      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 grails.dev.commands

import groovy.transform.CompileStatic

import org.grails.core.io.support.GrailsFactoriesLoader

/**
 * A registry of {@grails.dev.commands.ApplicationContextCommand} instances
 *
 * @author Graeme Rocher
 * @since 3.0
 */
@CompileStatic
@Singleton(strict = false)
class ApplicationContextCommandRegistry {

    private final Map<String, ApplicationCommand> commands = [:]

    ApplicationContextCommandRegistry() {
        for (ApplicationCommand cmd  : GrailsFactoriesLoader.loadFactories(ApplicationCommand)) {
            if (!commands.containsKey(cmd.name)) {
                commands[cmd.name] = cmd
            }
        }

        // If this is reflectively loaded from the delegating cli, we need to make sure the context class loader is also used to pull any commands that are loaded from the gradle classpath
        for (ApplicationCommand cmd : GrailsFactoriesLoader.loadFactories(ApplicationCommand, Thread.currentThread().contextClassLoader)) {
            if (!commands.containsKey(cmd.name)) {
                commands[cmd.name] = cmd
            }
        }
    }

    Collection<ApplicationCommand> findCommands() {
        commands.values()
    }

    ApplicationCommand findCommand(String name) {
        commands[name]
    }
}
