/********************************************************************************
 * Copyright (C) 2018-2019 Ericsson and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/

import { Container, injectable } from 'inversify';
import { CppTaskProvider } from './cpp-task-provider';
import { TaskResolverRegistry } from '@theia/task/lib/browser/task-contribution';
import { CppBuildConfigurationManager } from './cpp-build-configurations';
import { Event } from '@theia/core';
import { expect } from 'chai';
import { TaskConfiguration } from '@theia/task/lib/common';
import { ProcessTaskConfiguration } from '@theia/task/lib/common/process/task-protocol';
import { TaskDefinitionRegistry } from '@theia/task/lib/browser/task-definition-registry';
import { ProblemMatcherRegistry } from '@theia/task/lib/browser/task-problem-matcher-registry';
import { ProblemPatternRegistry } from '@theia/task/lib/browser/task-problem-pattern-registry';
import { CppBuildConfiguration } from '../common/cpp-build-configuration-protocol';

// The object under test.
let taskProvider: CppTaskProvider;

@injectable()
class MockCppBuildConfigurationManager implements CppBuildConfigurationManager {
    /**
     * Get available build configurations.
     *
     * @returns the list of build configurations.
     */
    getConfigs(): CppBuildConfiguration[] {
        return [{
            name: 'Build 1',
            directory: '/tmp/build1',
        }, {
            name: 'Build 2',
            directory: '/tmp/build2',
            commands: {
                build: 'very complex command',
            }
        }];
    }

    /**
     * Get the list of valid build configurations.
     *
     * @returns the list of valid build configurations.
     */
    getValidConfigs(): CppBuildConfiguration[] {
        return this.getConfigs();
    }

    /**
     * Get the active build configuration.
     *
     * @returns the active build configuration if it exists.
     */
    getActiveConfig(): CppBuildConfiguration | undefined {
        return undefined;
    }

    /**
     * Change the active build configuration.
     * @param config the build configuration. If `undefined` no active build configuration exists.
     */
    setActiveConfig(config: CppBuildConfiguration | undefined): void { }

    /**
     * Event emitted when the active build configuration changes.
     */
    onActiveConfigChange: Event<CppBuildConfiguration | undefined>;

    /**
     * Event emitted when an active build configuration changes.
     */
    onActiveConfigChange2: Event<Map<string, CppBuildConfiguration>>;

    /**
     * Promise resolved when the list of build configurations has been read
     * once, and the active configuration has been set, if relevant.
     */
    ready: Promise<void> = Promise.resolve();
}

beforeEach(function (): void {
    const container: Container = new Container();
    container.bind(CppTaskProvider).toSelf().inSingletonScope();
    container.bind(CppBuildConfigurationManager).to(MockCppBuildConfigurationManager);
    container.bind(TaskResolverRegistry).toSelf().inSingletonScope();
    container.bind(TaskDefinitionRegistry).toSelf().inSingletonScope();
    container.bind(ProblemMatcherRegistry).toSelf().inSingletonScope();
    container.bind(ProblemPatternRegistry).toSelf().inSingletonScope();

    taskProvider = container.get(CppTaskProvider);

    // Register a task resolver of type 'shell', on which the cpp build tasks
    // depend.  Just return the task as-is, since we only need to verify what
    // CppTaskProvider passed to the shell task resolver.
    container.get(TaskResolverRegistry).register('shell', {
        async resolveTask(task: TaskConfiguration): Promise<TaskConfiguration> {
            return task;
        }
    });
});

describe('CppTaskProvider', function (): void {
    it('provide a task for each build config with a build command', async function (): Promise<void> {
        const tasks = await taskProvider.provideTasks();
        expect(tasks).length(1);
        expect(tasks[0].config.name).to.be.equal('Build 2');

        const resolvedTask = await taskProvider.resolveTask(tasks[0]);
        expect(resolvedTask.type === 'shell');
        expect((<ProcessTaskConfiguration>resolvedTask).options!.cwd).to.be.equal('/tmp/build2');
        expect((<ProcessTaskConfiguration>resolvedTask).command).to.be.equal('very');
        expect((<ProcessTaskConfiguration>resolvedTask).args).to.deep.equal(['complex', 'command']);
    });
});