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path: root/src/main/java/moe/nea/zwirn/Zwirn.java
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package moe.nea.zwirn;

import net.fabricmc.stitch.commands.tinyv2.TinyFile;
import org.jetbrains.annotations.NotNull;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.List;

public class Zwirn {
    public static @NotNull TinyFile mergeTinyFile(
            @NotNull TinyFile base, @NotNull TinyFile overlay,
            @NotNull String sharedNamespace) {
        var namespaces = base.getHeader().getNamespaces();
        if (!namespaces.containsAll(overlay.getHeader().getNamespaces()))
            throw new IllegalArgumentException("When merging a tiny file, overlay may not introduce a new namespace.");
        if (!overlay.getHeader().getNamespaces().contains(sharedNamespace))
            throw new IllegalArgumentException("When merging a tiny file, overlay must contain the shared namespace");
        return new TinyMerger(base, overlay, sharedNamespace).merge();
    }

    public static @NotNull TinyFile enrichSeargeWithMCP(@NotNull TinyFile searge, @NotNull Path mcpArchiveRoot) throws IOException {
        if (!searge.getHeader().getNamespaces().equals(Arrays.asList("left", "right")))
            throw new IllegalArgumentException("Searge namespaces need to be left and right");
        var fields = mcpArchiveRoot.resolve("fields.csv");
        var methods = mcpArchiveRoot.resolve("methods.csv");
        var params = mcpArchiveRoot.resolve("params.csv");
        if (!Files.exists(fields))
            throw new IllegalArgumentException("Missing fields.csv");
        if (!Files.exists(methods))
            throw new IllegalArgumentException("Missing methods.csv");
        if (!Files.exists(params))
            throw new IllegalArgumentException("Missing params.csv");
        return new EnrichSeargeWithMCP(searge, fields, methods, params).mergeTinyFile();
    }

    public static @NotNull TinyFile createOverlayTinyFile(
            @NotNull TinyFile base, @NotNull TinyFile overlay,
            @NotNull List<@NotNull String> retainedNamespaces,
            @NotNull String sharedNamespace
    ) {
        if (!base.getHeader().getNamespaces().equals(overlay.getHeader().getNamespaces()))
            throw new IllegalArgumentException("Namespaces in input must be equal");
        if (!base.getHeader().getNamespaces().containsAll(retainedNamespaces))
            throw new IllegalArgumentException("Retained namespaces must be present in input files");
        if (!retainedNamespaces.contains(sharedNamespace))
            throw new IllegalArgumentException("Shared namespace must be retained");
        return new TinyDiffer(base, overlay, retainedNamespaces).createDiff();
    }
}