package ir.cblock.test;

import org.bukkit.Bukkit;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.plugin.java.JavaPlugin;

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public final class Test extends JavaPlugin {

    private static final String PLUGIN_NAME = "CTTest";
    private static final String API_URL_TEMPLATE = "https://restrict.craft-tech.ir/safe/license?license=%s&plugin_name=%s&server_ip=%s";
    private static final String IP_API_URL = "https://files.craft-tech.ir/ip.php";

    @Override
    public void onEnable() {
        if (!Bukkit.getPluginManager().isPluginEnabled("CTLoader")) {
            getLogger().severe("CTLoader dependency not found! Disabling plugin.");
            Bukkit.getPluginManager().disablePlugin(this);
            return;
        }

        saveDefaultConfig();
        FileConfiguration config = getConfig();
        String licenseKey = config.getString("license-key", "").trim();

        if (licenseKey.isEmpty() || licenseKey.equals("YOUR_LICENSE_KEY")) {
            getLogger().warning("Please provide a valid license key in config.yml! Disabling plugin.");
            Bukkit.getPluginManager().disablePlugin(this);
            return;
        }

        getLogger().info("Checking license, please wait...");

        Bukkit.getScheduler().runTaskAsynchronously(this, () -> {
            try {
                String publicIp = getPublicIp();
                boolean isValid = checkLicense(licenseKey, publicIp);

                if (isValid) {
                    getLogger().info("License successfully verified!");
                } else {
                    getLogger().severe("Invalid or expired license! Disabling plugin.");
                    disablePluginOnMainThread();
                }
            } catch (Exception e) {
                getLogger().severe("Failed to connect to the license server: " + e.getMessage());
                disablePluginOnMainThread();
            }
        });
    }

    @Override
    public void onDisable() {
    }

    private String getPublicIp() throws Exception {
        HttpClient client = HttpClient.newBuilder()
                .connectTimeout(Duration.ofSeconds(5))
                .build();

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(IP_API_URL))
                .timeout(Duration.ofSeconds(5))
                .GET()
                .build();

        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

        if (response.statusCode() == 200) {
            String body = response.body();
            Pattern pattern = Pattern.compile("\"ip\"\\s*:\\s*\"([^\"]+)\"");
            Matcher matcher = pattern.matcher(body);
            if (matcher.find()) {
                return matcher.group(1);
            }
        }
        throw new IllegalStateException("Could not parse IP from response");
    }

    private boolean checkLicense(String licenseKey, String publicIp) throws Exception {
        String finalUrl = String.format(API_URL_TEMPLATE, licenseKey, PLUGIN_NAME, publicIp);

        HttpClient client = HttpClient.newBuilder()
                .connectTimeout(Duration.ofSeconds(5))
                .build();

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(finalUrl))
                .timeout(Duration.ofSeconds(5))
                .GET()
                .build();

        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

        if (response.statusCode() == 200) {
            String body = response.body();
            Pattern pattern = Pattern.compile("\"status\"\\s*:\\s*\"(valid)\"");
            Matcher matcher = pattern.matcher(body);
            return matcher.find();
        }

        return false;
    }

    private void disablePluginOnMainThread() {
        Bukkit.getScheduler().runTask(this, () -> Bukkit.getPluginManager().disablePlugin(this));
    }
}