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package com.oracle.truffle.runtime;

import java.util.function.Function;

import org.graalvm.options.OptionDescriptors;
import org.graalvm.options.OptionValues;

import com.oracle.truffle.api.TruffleLogger;

public interface EngineCacheSupport extends OptimizedRuntimeServiceProvider {

    void onEngineCreated(EngineData e);

    void onEnginePatch(EngineData e);

    boolean onEngineClosing(EngineData e);

    void onEngineClosed(EngineData e);

    boolean isStoreEnabled(OptionValues options);

    Object tryLoadingCachedEngine(OptionValues options, Function loggerFactory);

    final class Disabled implements EngineCacheSupport {

        @Override
        public void onEngineCreated(EngineData e) {
        }

        @Override
        public void onEnginePatch(EngineData e) {
        }

        @Override
        public Object tryLoadingCachedEngine(OptionValues options, Function loggerFactory) {
            return null;
        }

        @Override
        public boolean onEngineClosing(EngineData e) {
            return false;
        }

        @Override
        public boolean isStoreEnabled(OptionValues options) {
            return false;
        }

        @Override
        public void onEngineClosed(EngineData e) {
        }

        @Override
        public int getPriority() {
            // only last resort
            return Integer.MIN_VALUE;
        }

        @Override
        public OptionDescriptors getEngineOptions() {
            return OptionDescriptors.EMPTY;
        }

    }

    static EngineCacheSupport get() {
        return OptimizedTruffleRuntime.getRuntime().getEngineCacheSupport();
    }

}