package dev.loki.loparkour.schematic.schem;

import com.sk89q.worldedit.extent.clipboard.Clipboard;
import com.sk89q.worldedit.extent.clipboard.io.ClipboardFormat;
import com.sk89q.worldedit.extent.clipboard.io.ClipboardFormats;
import com.sk89q.worldedit.extent.clipboard.io.ClipboardReader;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public final class SchemLoader {

    private static final int MAX_FILE_SIZE = 10 * 1024 * 1024;

    private SchemLoader() {
    }

    @NotNull
    public static Clipboard load(@NotNull File file) throws IOException {
        if (file.length() > MAX_FILE_SIZE) {
            throw new IOException("Schematic file too large: " + file.getName());
        }
        final ClipboardFormat format = ClipboardFormats.findByFile(file);
        if (format == null) {
            throw new IOException("Unsupported schematic file: " + file.getName());
        }
        try (FileInputStream in = new FileInputStream(file);
             ClipboardReader reader = format.getReader(in)) {
            final Clipboard clipboard = reader.read();
            if (clipboard == null) {
                throw new IOException("Schematic file returned no clipboard: " + file.getName());
            }
            return clipboard;
        }
    }
}