package io.gitlab.jfronny.glaunch.util.mojang;

import io.gitlab.jfronny.glaunch.GLaunch;
import io.gitlab.jfronny.glaunch.model.AssetIndex;
import io.gitlab.jfronny.glaunch.model.VersionInfo;
import io.gitlab.jfronny.glaunch.model.VersionsList;
import io.gitlab.jfronny.glaunch.model.VersionsListInfo;
import io.gitlab.jfronny.glaunch.util.Utils;

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

import static io.gitlab.jfronny.glaunch.util.Utils.downloadObject;

public class McApi {
    public static VersionsList getVersions() {
        try {
            return downloadObject("https://launchermeta.mojang.com/mc/game/version_manifest.json", VersionsList.class);
        } catch (IOException e) {
            throw new RuntimeException("Could not load version manifest", e);
        }
    }

    public static VersionInfo getVersionInfo(VersionsListInfo listInfo) throws IOException {
        return downloadObject(listInfo.url, VersionInfo.class);
    }

    public static AssetIndex getAssetIndex(VersionInfo info) throws IOException {
        Path file = GLaunch.ASSETS_DIR.resolve("indexes");
        if (!Files.exists(file)) Files.createDirectories(file);
        file = file.resolve(Path.of(info.assetIndex.url).getFileName());
        try {
            Utils.downloadFile(info.assetIndex.url, info.assetIndex.sha1, file);
        }
        catch (IOException e) {
            if (!Files.exists(file)) throw e;
        }
        return Utils.loadObject(file, AssetIndex.class);
    }

    public static void downloadAsset(AssetIndex.Asset asset, Path path) throws IOException {
        String url = "http://resources.download.minecraft.net/" + asset.hash.substring(0, 2) + "/" + asset.hash;
        Utils.downloadFile(url, asset.hash, path);
    }
}