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package dev.jbang.source.resolvers;

import java.nio.file.Path;
import java.util.function.Function;

import dev.jbang.dependencies.DependencyUtil;
import dev.jbang.dependencies.ModularClassPath;
import dev.jbang.source.ResourceRef;
import dev.jbang.source.ResourceResolver;

/**
 * A ResourceResolver that, when given a resource string which
 * looks like a Maven GAV, will try to resolve that dependency and return a
 * reference to the downloaded artifact JAR.
 */
public class GavResourceResolver implements ResourceResolver {
	private final Function depResolver;

	public GavResourceResolver(Function depResolver) {
		this.depResolver = depResolver;
	}

	@Override
	public String description() {
		return "Maven GAV";
	}

	@Override
	public ResourceRef resolve(String resource) {
		ResourceRef result = null;

		if (DependencyUtil.looksLikeAGav(resource)) {
			// todo honor offline
			ModularClassPath mcp = depResolver.apply(resource);
			// We possibly get a whole bunch of artifacts but we're only interested in the
			// one we asked for, which we assume is always the first one in the list
			// (hopefully we're right).
			Path file = mcp.getArtifacts().get(0).getFile();
			result = ResourceRef.forCachedResource(resource, file);
		}

		return result;
	}
}