package org.bndtools.headless.build.plugin.gradle;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;

import org.bndtools.api.NamedPlugin;
import org.bndtools.headless.build.manager.api.HeadlessBuildPlugin;
import org.bndtools.utils.copy.bundleresource.BundleResourceCopier;
import org.bndtools.utils.copy.bundleresource.CopyMode;
import org.bndtools.versioncontrol.ignores.manager.api.VersionControlIgnoresManager;
import org.osgi.framework.BundleContext;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;

import aQute.bnd.build.Workspace;
import aQute.bnd.osgi.Constants;

@Component
public class GradleHeadlessBuildPlugin implements HeadlessBuildPlugin {
	private final AtomicReference<VersionControlIgnoresManager> versionControlIgnoresManager = new AtomicReference<>();

	@Reference(cardinality = ReferenceCardinality.OPTIONAL, policy = ReferencePolicy.DYNAMIC)
	public void setVersionControlIgnoresManager(VersionControlIgnoresManager versionControlIgnoresManager) {
		this.versionControlIgnoresManager.set(versionControlIgnoresManager);
	}

	public void unsetVersionControlIgnoresManager(VersionControlIgnoresManager versionControlIgnoresManager) {
		this.versionControlIgnoresManager.compareAndSet(versionControlIgnoresManager, null);
	}

	@Activate
	public void activate(BundleContext bundleContext) {
		copier = new BundleResourceCopier(bundleContext.getBundle());
	}

	@Deactivate
	public void deactivate() {
		copier = null;
	}

	private BundleResourceCopier copier = null;

	/*
	 * HeadlessBuildPlugin
	 */

	@Override
	public NamedPlugin getInformation() {
		return new GradleHeadlessBuildPluginInformation();
	}

	@Override
	@Deprecated
	public void setup(boolean cnf, File projectDir, boolean add, Set<String> enabledIgnorePlugins) throws IOException {
		setup(cnf, projectDir, add, enabledIgnorePlugins, new LinkedList<String>());
	}

	@Override
	public void setup(boolean cnf, File projectDir, boolean add, Set<String> enabledIgnorePlugins,
		List<String> warnings) throws IOException {
		if (!cnf) {
			return;
		}

		/* cnf */

		File workspaceRoot = projectDir.getParentFile();

		String baseDir = "templates/root/";
		copier.addOrRemoveDirectory(workspaceRoot, baseDir, "/", add ? CopyMode.ADD : CopyMode.REMOVE);

		Collection<File> files = copier.addOrRemoveDirectory(projectDir, baseDir, "/",
			add ? CopyMode.ADD : CopyMode.CHECK);
		for (File file : files) {
			String warning;
			if (add)
				warning = String.format("Not overwriting existing Gradle build file: %s", file);
			else
				warning = String.format("Gradle build file may need to be removed: %s", file);
			warnings.add(warning);
		}

		VersionControlIgnoresManager ignoresManager = versionControlIgnoresManager.get();
		if (ignoresManager != null) {
			List<String> ignoredEntries = new LinkedList<>();
			ignoredEntries.add(ignoresManager.sanitiseGitIgnoreGlob(true, "/.gradle/", true));
			ignoredEntries.add(ignoresManager.sanitiseGitIgnoreGlob(true, "/reports/", true));
			ignoredEntries.add(ignoresManager.sanitiseGitIgnoreGlob(true, Workspace.getDefaults()
				.getProperty(Constants.DEFAULT_PROP_TARGET_DIR), true));

			ignoresManager.addIgnores(enabledIgnorePlugins, workspaceRoot, ignoredEntries);
		}
	}
}
