package ctbrec.sites.streamate;

import static ctbrec.io.HttpConstants.*;

import java.io.IOException;
import java.util.Collections;
import java.util.Locale;
import java.util.NoSuchElementException;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

import ctbrec.Config;
import ctbrec.io.HttpClient;
import ctbrec.io.HttpException;
import okhttp3.Cookie;
import okhttp3.HttpUrl;
import okhttp3.MediaType;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class StreamateHttpClient extends HttpClient {

    private static final String SAKEY_KEY = "sakey";

    private static final Logger LOG = LoggerFactory.getLogger(StreamateHttpClient.class);

    private Long userId;
    private String saKey = "";
    private String userNickname = "";
    private String xsrfToken = null;

    public StreamateHttpClient() {
        super("streamate");

        // this cookie is needed for the search
        Cookie searchCookie = new Cookie.Builder()
                .domain("streamate.com")
                .name("Xld_rct")
                .value("1")
                .build();
        getCookieJar().saveFromResponse(HttpUrl.parse(Streamate.BASE_URL), Collections.singletonList(searchCookie));

        // try to load sakey from cookie
        try {
            Cookie cookie = getCookieJar().getCookie(HttpUrl.parse("https://www.streamate.com"), SAKEY_KEY);
            saKey = cookie.value();
        } catch (NoSuchElementException e) {
            // ignore
        }

        loadXsrfToken();
    }

    private void loadXsrfToken() {
        // do a first request to get cookies and stuff
        Request req = new Request.Builder() //
                .url(Streamate.BASE_URL + "/initialData.js") //
                .header(USER_AGENT, Config.getInstance().getSettings().httpUserAgent) //
                .header(COOKIE, "smtid="+UUID.randomUUID().toString()+"; Xld_rct=1;") //
                .header(REFERER, Streamate.BASE_URL)
                .build();
        try (Response resp = execute(req)) {
            if (resp.code() == 200) {
                LOG.info("Initial request was fine, Extracting XSRF token");
                Matcher m = Pattern.compile("\"xsrfToken\":\"(.*?)\"").matcher(resp.body().string());
                if (m.find()) {
                    xsrfToken = m.group(1);
                }
            } else {
                throw new HttpException(resp.code(), resp.message());
            }
        } catch (IOException e) {
            LOG.error("Initial request failed", e);
        }
    }

    @Override
    public synchronized boolean login() throws IOException {
        if(loggedIn) {
            return true;
        }

        boolean cookiesWorked = checkLoginSuccess();
        if(cookiesWorked) {
            loggedIn = true;
            LOG.debug("Logged in with cookies");
            return true;
        }

        loggedIn = loginWithoutCookies();
        return loggedIn;
    }

    private synchronized boolean loginWithoutCookies() throws IOException {
        JSONObject loginRequest = new JSONObject();
        loginRequest.put("allowLoginRedirection", true);
        loginRequest.put("email", Config.getInstance().getSettings().streamateUsername);
        loginRequest.put("password", Config.getInstance().getSettings().streamatePassword);
        loginRequest.put("referrerId", 0);
        loginRequest.put("siteId", 1);
        loginRequest.put("siteType", "premium");
        loginRequest.put("tzOffsetMinutes", 0);
        RequestBody body = RequestBody.create(MediaType.parse("application/json"), loginRequest.toString());
        Request login = newRequestBuilder()
                .url(Streamate.BASE_URL + "/api/member/login")
                .post(body)
                .build();
        try (Response response = client.newCall(login).execute()) {
            String content = response.body().string();
            if(response.isSuccessful()) {
                JSONObject json = new JSONObject(content);
                //LOG.debug(json.toString(2));
                loggedIn = json.has(SAKEY_KEY);
                saKey = json.optString(SAKEY_KEY);
                JSONObject account = json.getJSONObject("account");
                userId = account.getLong("userid");
                userNickname = account.getString("nickname");
            } else {
                throw new IOException("Login failed: " + response.code() + " " + response.message());
            }
        }

        return loggedIn;
    }

    public Request.Builder newRequestBuilder() {
        return new Request.Builder() // @formatter:off
                .header(USER_AGENT, Config.getInstance().getSettings().httpUserAgent)
                .header(ACCEPT, MIMETYPE_APPLICATION_JSON)
                .header(ACCEPT_LANGUAGE, Locale.ENGLISH.getLanguage())
                .header(REFERER, Streamate.BASE_URL)
                .header(X_REQUESTED_WITH, XML_HTTP_REQUEST)
                .header("X-XSRF-TOKEN", getXsrfToken()); // @formatter:on
    }

    /**
     * Check, if the login worked by loading the favorites
     */
    public boolean checkLoginSuccess() {
        String url = Streamate.BASE_URL + "/api/search/v1/favorites?host=streamate.com&domain=streamate.com";
        url = url + "&page_number=1&results_per_page=48&sakey=" + saKey + "&userid=" + userId;
        Request request = newRequestBuilder().url(url).build();
        try (Response response = execute(request)) {
            if (response.isSuccessful()) {
                String content = response.body().string();
                JSONObject json = new JSONObject(content);
                return json.optString("status").equals("SM_OK");
            } else {
                return false;
            }
        } catch (Exception e) {
            return false;
        }
    }

    public String getSaKey() {
        return saKey;
    }

    public Long getUserId() throws IOException {
        if(userId == null) {
            loginWithoutCookies();
        }
        return userId;
    }

    public String getUserNickname() {
        return userNickname;
    }

    public String getXsrfToken() {
        return xsrfToken;
    }
}