package io.gitlab.jfronny.glaunch.install.steps;

import io.gitlab.jfronny.glaunch.GLaunch;
import io.gitlab.jfronny.glaunch.install.SetupStepInfo;
import io.gitlab.jfronny.glaunch.install.Step;
import io.gitlab.jfronny.glaunch.model.VersionInfo;
import io.gitlab.jfronny.glaunch.util.Utils;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

public class DownloadLibrariesStep implements Step {
    @Override
    public void execute(SetupStepInfo info) throws IOException {
        for (VersionInfo.Library library : info.version().libraries) {
            if (library.rules != null && !library.rules.allow()) continue;
            if (library.downloads.classifiers != null && library.natives != null && library.natives.containsKey(Utils.OS)) {
                downloadLib(library.downloads.classifiers.get(library.natives.get(Utils.OS)));
            }
            if (library.downloads.artifact == null) {
                GLaunch.LOGGER.info("Null library artifact @ " + library.name);
                continue;
            }
            downloadLib(library.downloads.artifact);
        }
    }

    private void downloadLib(VersionInfo.Library.Downloads.Artifact artifact) throws IOException {
        Path path = GLaunch.LIBRARIES_DIR.resolve(artifact.path);
        if (Files.exists(path)) return;
        //TODO allow maven-like download for fabric
        GLaunch.LOGGER.info("Downloading library: " + artifact.path);
        if (!Files.exists(path.getParent())) Files.createDirectories(path.getParent());
        Utils.downloadFile(artifact.url, artifact.sha1, path);
    }
}