/*
 * Decompiled with CFR 0.152.
 * 
 * Could not load the following classes:
 *  com.google.common.base.Splitter
 *  com.google.gson.JsonObject
 *  com.google.gson.JsonParseException
 *  com.mojang.logging.LogUtils
 *  org.slf4j.Logger
 */
package net.minecraft.client.resources;

import com.google.common.base.Splitter;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.mojang.logging.LogUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;
import net.minecraft.server.packs.linkfs.LinkFileSystem;
import net.minecraft.util.GsonHelper;
import org.slf4j.Logger;

public class IndexedAssetSource {
    private static final Logger LOGGER = LogUtils.getLogger();
    public static final Splitter PATH_SPLITTER = Splitter.on((char)'/');

    public static Path createIndexFs(Path assetsDirectory, String index) {
        Path objectsDirectory = assetsDirectory.resolve("objects");
        LinkFileSystem.Builder builder = LinkFileSystem.builder();
        Path indexFile = assetsDirectory.resolve("indexes/" + index + ".json");
        try (BufferedReader reader = Files.newBufferedReader(indexFile, StandardCharsets.UTF_8);){
            JsonObject root = GsonHelper.parse(reader);
            JsonObject objects = GsonHelper.getAsJsonObject(root, "objects", null);
            if (objects != null) {
                for (Map.Entry entry : objects.entrySet()) {
                    JsonObject object = (JsonObject)entry.getValue();
                    String filename = (String)entry.getKey();
                    List path = PATH_SPLITTER.splitToList((CharSequence)filename);
                    String hash = GsonHelper.getAsString(object, "hash");
                    Path file = objectsDirectory.resolve(hash.substring(0, 2) + "/" + hash);
                    builder.put(path, file);
                }
            }
        }
        catch (JsonParseException ignored) {
            LOGGER.error("Unable to parse resource index file: {}", (Object)indexFile);
        }
        catch (IOException ignored) {
            LOGGER.error("Can't open the resource index file: {}", (Object)indexFile);
        }
        return builder.build("index-" + index).getPath("/", new String[0]);
    }
}