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package dev.jbang.source.buildsteps;

import java.io.IOException;
import java.util.Map;
import java.util.Properties;

import dev.jbang.source.BuildContext;
import dev.jbang.source.Builder;
import dev.jbang.source.Project;
import dev.jbang.spi.IntegrationManager;
import dev.jbang.spi.IntegrationResult;

/**
 * This class takes a Project and the result of a previous
 * "compile" step and runs any integrations that might be found. Those
 * integration can make changes to the project that will be used as the input
 * for the next build step.
 */
public class IntegrationBuildStep implements Builder {
	private final BuildContext ctx;

	public IntegrationBuildStep(BuildContext ctx) {
		this.ctx = ctx;
	}

	@Override
	public IntegrationResult build() throws IOException {
		// todo: setting properties to avoid loosing properties in integration call.
		Project project = ctx.getProject();
		Properties oldProps = System.getProperties();
		Properties tempProps = new Properties();
		tempProps.putAll(oldProps);
		System.setProperties(tempProps);
		for (Map.Entry entry : project.getProperties().entrySet()) {
			System.setProperty(entry.getKey(), entry.getValue());
		}
		try {
			IntegrationResult integrationResult = IntegrationManager.runIntegrations(ctx);

			if (project.getMainClass() == null) { // if non-null user forced set main
				if (integrationResult.mainClass != null) {
					project.setMainClass(integrationResult.mainClass);
				}
			}
			if (integrationResult.javaArgs != null && !integrationResult.javaArgs.isEmpty()) {
				// Add integration options to the java options
				project.addRuntimeOptions(integrationResult.javaArgs);
			}
			return integrationResult;
		} finally {
			System.setProperties(oldProps);
		}
	}
}