package org.shedlang.compiler.backends;

import org.shedlang.compiler.backends.cranelift.CraneliftBackendFactory;
import org.shedlang.compiler.backends.llvm.LlvmBackendFactory;
import org.shedlang.compiler.backends.targets.ShedTarget;
import org.shedlang.compiler.backends.wasm.WasmBackendFactory;

import java.util.List;
import java.util.Optional;

public class Backends {
    private Backends() {
    }

    private static final List<BackendFactory> BACKEND_FACTORIES = List.of(
        new LlvmBackendFactory(),
        new WasmBackendFactory(),
        new CraneliftBackendFactory(),
        PatioNativeCHeadersBackend.FACTORY,
        PatioTextBackend.FACTORY,
        ShidTextBackend.FACTORY
    );

    public static List<String> backendNames() {
        return BACKEND_FACTORIES.stream()
            .map(factory -> factory.name())
            .toList();
    }

    public static Optional<BackendFactory> backendFactory(String backendName) {
        return BACKEND_FACTORIES.stream()
            .filter(factory -> factory.name().equals(backendName))
            .findFirst();
    }

    public static Backend backendForTarget(ShedTarget target) {
        for (var factory : BACKEND_FACTORIES) {
            var backend = factory.backendForTarget(target);
            if (backend.isPresent()) {
                return backend.get();
            }
        }

        throw new UnsupportedOperationException("TODO");
    }
}