package io.gitlab.jfronny.libjf.config.impl.ui;

import io.gitlab.jfronny.libjf.config.api.v1.ui.ConfigScreenFactory;
import net.fabricmc.loader.api.FabricLoader;

import java.util.Comparator;
import java.util.List;

public class ConfigScreenFactoryDiscovery {
    private static ConfigScreenFactory<?> discovered1 = null;
    private static io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory discovered2 = null;

    @Deprecated
    public static ConfigScreenFactory<?> getConfigured() {
        if (discovered1 == null) {
            List<Object> entrypoints = getEntrypoints();
            discovered1 = entrypoints
                    .stream()
                    .filter(it -> it instanceof io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory<?,?>)
                    .map(it -> (io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory) it)
                    .max(Comparator.comparing(io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory::getPriority))
                    .<ConfigScreenFactory>map(ConfigScreenFactory2To1::new)
                    .orElseGet(() -> entrypoints
                            .stream()
                            .filter(it -> it instanceof ConfigScreenFactory<?>)
                            .map(it -> (ConfigScreenFactory) it)
                            .max(Comparator.comparing(ConfigScreenFactory::getPriority))
                            .orElseGet(() -> new ConfigScreenFactory2To1(new PlaceholderScreenFactory())));
        }
        return discovered1;
    }

    public static io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory<?, ?> getConfigured2() {
        if (discovered2 == null) {
            List<Object> entrypoints = getEntrypoints();
            discovered2 = entrypoints
                    .stream()
                    .filter(it -> it instanceof io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory<?,?>)
                    .map(it -> (io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory) it)
                    .max(Comparator.comparing(io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory::getPriority))
                    .orElseGet(() -> entrypoints
                            .stream()
                            .filter(it -> it instanceof ConfigScreenFactory<?>)
                            .map(it -> (ConfigScreenFactory) it)
                            .<io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory>map(ConfigScreenFactory1To2::new)
                            .max(Comparator.comparing(io.gitlab.jfronny.libjf.config.api.v2.ui.ConfigScreenFactory::getPriority))
                            .orElseGet(PlaceholderScreenFactory::new));
        }
        return discovered2;
    }

    private static List<Object> getEntrypoints() {
        return FabricLoader.getInstance().getEntrypoints("libjf:config_screen", Object.class);
    }
}