package dev.dinauer.oidcproxy.startup;

import dev.dinauer.oidcproxy.startup.model.ConfigRoute;
import dev.dinauer.oidcproxy.startup.model.ConfigRules;
import io.quarkus.runtime.Startup;
import jakarta.enterprise.context.ApplicationScoped;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Strings;
import org.apache.commons.lang3.tuple.Pair;
import tools.jackson.databind.ObjectMapper;
import tools.jackson.dataformat.yaml.YAMLFactory;

import java.io.File;
import java.util.LinkedList;
import java.util.List;
import java.util.Optional;

@ApplicationScoped
public class RouteService
{
    private List<ProxyRoute> routes;

    @Startup
    void start()
    {
        ConfigRules rules = new ObjectMapper(new YAMLFactory()).readValue(new File("/home/andreas/Documents/dev/oidc-proxy/src/main/resources/routes.yaml"), ConfigRules.class);

        List<ProxyRoute> result = new LinkedList<>();
        for (ConfigRoute route : rules.routes())
        {
            if (StringUtils.isBlank(rules.root()))
            {
                result.add(new ProxyRoute(route.path(), route.target(), route.strategy()));
            }
            else
            {
                result.add(new ProxyRoute(StringUtils.join(rules.root(), route.path()), route.target(), route.strategy()));
            }
        }
        this.routes = result;
    }

    public Optional<ProxyRoute> match(List<String> request)
    {
        Pair<Integer, ProxyRoute> best = null;
        for (ProxyRoute proxyRoute : this.routes)
        {
            Optional<Integer> match = SegmentMatcher.match(proxyRoute.segments(), request);
            if (match.isPresent())
            {
                int matchLength = match.get();
                if (best == null || best.getLeft() < matchLength)
                {
                    best = Pair.ofNonNull(matchLength, proxyRoute);
                }
            }
        }
        if (best != null)
        {
            return Optional.of(best.getRight());
        }
        return Optional.empty();
    }
}