package ctbrec.ui.sites.cam4;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collections;
import java.util.Objects;
import java.util.function.Consumer;

import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ctbrec.Config;
import ctbrec.sites.cam4.Cam4;
import ctbrec.ui.ExternalBrowser;
import okhttp3.Cookie;
import okhttp3.Cookie.Builder;
import okhttp3.CookieJar;
import okhttp3.HttpUrl;

public class Cam4ElectronLoginDialog {

    private static final Logger LOG = LoggerFactory.getLogger(Cam4ElectronLoginDialog.class);
    public static final String DOMAIN = "cam4.com";
    public static final String URL = Cam4.BASE_URI + "/login";
    private CookieJar cookieJar;
    private ExternalBrowser browser;

    public Cam4ElectronLoginDialog(CookieJar cookieJar) throws IOException {
        this.cookieJar = cookieJar;
        browser = ExternalBrowser.getInstance();
        try {
            JSONObject config = new JSONObject();
            config.put("url", URL);
            config.put("w", 480);
            config.put("h", 640);
            JSONObject msg = new JSONObject();
            msg.put("config", config);
            browser.run(msg, msgHandler);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new IOException("Couldn't wait for login dialog", e);
        } finally {
            browser.close();
        }
    }

    private Consumer<String> msgHandler = line -> {
        if(!line.startsWith("{")) {
            LOG.error("Didn't received a JSON object {}", line);
        } else {
            JSONObject json = new JSONObject(line);
            if(json.has("url")) {
                String url = json.getString("url");

                if(url.endsWith("/login")) {
                    try {
                        String username = Config.getInstance().getSettings().cam4Username;
                        if (username != null && !username.trim().isEmpty()) {
                            browser.executeJavaScript("document.querySelector('#loginPageForm input[name=\"username\"]').value = '" + username + "';");
                        }
                        String password = Config.getInstance().getSettings().cam4Password;
                        if (password != null && !password.trim().isEmpty()) {
                            password = password.replace("'", "\\'");
                            browser.executeJavaScript("document.querySelector('#loginPageForm input[name=\"password\"]').value = '" + password + "';");
                        }
                        browser.executeJavaScript("document.getElementById('footer').setAttribute('style', 'display:none');");
                        browser.executeJavaScript("document.getElementById('promptArea').setAttribute('style', 'display:none');");
                        browser.executeJavaScript("document.getElementById('content').setAttribute('style', 'padding: 0');");
                        browser.executeJavaScript("document.querySelector('div[class~=\"navbar\"]').setAttribute('style', 'display:none');");
                    } catch(Exception e) {
                        LOG.warn("Couldn't auto fill username and password for Cam4", e);
                    }
                }

                if(json.has("cookies")) {
                    JSONArray cookiesFromBrowser = json.getJSONArray("cookies");
                    try {
                        for (int i = 0; i < cookiesFromBrowser.length(); i++) {
                            JSONObject cookie = cookiesFromBrowser.getJSONObject(i);
                            if(cookie.getString("domain").contains("cam4")) {
                                String domain = cookie.getString("domain");
                                if(domain.startsWith(".")) {
                                    domain = domain.substring(1);
                                }
                                Cookie c = createCookie(domain, cookie);
                                cookieJar.saveFromResponse(HttpUrl.parse(url), Collections.singletonList(c));
                                c = createCookie("cam4.com", cookie);
                                cookieJar.saveFromResponse(HttpUrl.parse(Cam4.BASE_URI), Collections.singletonList(c));
                            }
                        }
                        if (Objects.equals(new URL(url).getPath(), "/")) {
                            closeBrowser();
                        }
                    } catch (MalformedURLException e) {
                        LOG.error("Couldn't parse new url {}", url, e);
                    }
                }
            }
        }
    };

    private Cookie createCookie(String domain, JSONObject cookie) {
        Builder b = new Cookie.Builder()
                .path(cookie.getString("path"))
                .domain(domain)
                .name(cookie.getString("name"))
                .value(cookie.getString("value"))
                .expiresAt((long) cookie.optDouble("expirationDate"));
        if(cookie.optBoolean("hostOnly")) {
            b.hostOnlyDomain(domain);
        }
        if(cookie.optBoolean("httpOnly")) {
            b.httpOnly();
        }
        if(cookie.optBoolean("secure")) {
            b.secure();
        }
        return b.build();
    }

    private void closeBrowser() {
        try {
            browser.close();
        } catch(IOException e) {
            LOG.error("Couldn't send close request to browser", e);
        }
    }
}