package app.fedilab.fedilabtube;


import android.content.Intent;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.text.style.UnderlineSpan;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;

import org.jetbrains.annotations.NotNull;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

import app.fedilab.fedilabtube.asynctasks.RetrievePeertubeNotificationsAsyncTask;
import app.fedilab.fedilabtube.asynctasks.UpdateAccountInfoAsyncTask;
import app.fedilab.fedilabtube.client.APIResponse;
import app.fedilab.fedilabtube.client.HttpsConnection;
import app.fedilab.fedilabtube.client.entities.Account;
import app.fedilab.fedilabtube.client.entities.PeertubeNotification;
import app.fedilab.fedilabtube.drawer.PeertubeNotificationsListAdapter;
import app.fedilab.fedilabtube.helper.Helper;
import app.fedilab.fedilabtube.interfaces.OnRetrievePeertubeNotificationsInterface;
import app.fedilab.fedilabtube.sqlite.AccountDAO;
import app.fedilab.fedilabtube.sqlite.Sqlite;
import es.dmoral.toasty.Toasty;


public class LoginActivity extends AppCompatActivity implements OnRetrievePeertubeNotificationsInterface {


    //Peertube notification type
    public static int NEW_VIDEO_FROM_SUBSCRIPTION = 1;
    //  public static int NEW_COMMENT_ON_MY_VIDEO = 2;
    //  public static int NEW_VIDEO_ABUSE_FOR_MODERATORS = 3;
    public static int BLACKLIST_ON_MY_VIDEO = 4;
    public static int UNBLACKLIST_ON_MY_VIDEO = 5;
    public static int MY_VIDEO_PUBLISHED = 6;
    public static int MY_VIDEO_IMPORT_SUCCESS = 7;
    public static int MY_VIDEO_IMPORT_ERROR = 8;
    private static String client_id;
    private static String client_secret;
    //  public static int NEW_USER_REGISTRATION = 9;
    //public static int NEW_FOLLOW = 10;
    //  public static int COMMENT_MENTION = 11;
    LinearLayoutManager mLayoutManager;
    private EditText login_uid;
    private EditText login_passwd;
    private Button connectionButton;
    private String actionToken;
    private boolean flag_loading;
    private PeertubeNotificationsListAdapter notificationsListAdapter;
    private String max_id;
    private List<PeertubeNotification> notifications;
    private RelativeLayout mainLoader, nextElementLoader, textviewNoAction;
    private boolean firstLoad;
    private SwipeRefreshLayout swipeRefreshLayout;
    private boolean swiped;
    private AsyncTask<Void, Void, Void> asyncTask;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        setContentView(R.layout.activity_login);
        if (getSupportActionBar() != null)
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        TextView create_an_account_peertube = findViewById(R.id.create_an_account_peertube);


        SpannableString content_create = new SpannableString(getString(R.string.join_peertube));
        content_create.setSpan(new UnderlineSpan(), 0, content_create.length(), 0);
        content_create.setSpan(new ForegroundColorSpan(ContextCompat.getColor(LoginActivity.this, R.color.colorAccent)), 0, content_create.length(),
                Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        create_an_account_peertube.setText(content_create);

        create_an_account_peertube.setOnClickListener(v -> {
            Intent mainActivity = new Intent(LoginActivity.this, PeertubeRegisterActivity.class);
            Bundle b = new Bundle();
            mainActivity.putExtras(b);
            startActivity(mainActivity);
        });


        login_uid = findViewById(R.id.login_uid);
        login_passwd = findViewById(R.id.login_passwd);
        connectionButton = findViewById(R.id.login_button);

        LinearLayout connected = findViewById(R.id.connected);
        LinearLayout not_connected = findViewById(R.id.not_connected);

        if (Helper.isLoggedIn(LoginActivity.this)) {
            not_connected.setVisibility(View.GONE);
            connected.setVisibility(View.VISIBLE);
            SharedPreferences sharedpreferences = getSharedPreferences(Helper.APP_PREFS, MODE_PRIVATE);
            SQLiteDatabase db = Sqlite.getInstance(getApplicationContext(), Sqlite.DB_NAME, null, Sqlite.DB_VERSION).open();
            String userId = sharedpreferences.getString(Helper.PREF_KEY_ID, null);
            String instance = sharedpreferences.getString(Helper.PREF_INSTANCE, Helper.getLiveInstance(LoginActivity.this));

            TextView instanceView = findViewById(R.id.instance);
            Account account = new AccountDAO(LoginActivity.this, db).getUniqAccount(userId, instance);
            if (account == null) {
                account = new AccountDAO(LoginActivity.this, db).getUniqAccount(userId, Helper.getPeertubeUrl(instance));
            }
            if (account != null) {
                ImageView profile_picture = findViewById(R.id.profile_picture);
                TextView username = findViewById(R.id.username);
                TextView displayname = findViewById(R.id.displayname);

                Helper.loadGiF(LoginActivity.this, account, profile_picture);
                username.setText(String.format("@%s", account.getUsername()));
                displayname.setText(account.getDisplay_name());

                instanceView.setText(account.getInstance());

                Button logout_button = findViewById(R.id.logout_button);
                Account finalAccount = account;
                logout_button.setOnClickListener(v -> {
                    AlertDialog.Builder dialogBuilderLogoutAccount = new AlertDialog.Builder(LoginActivity.this);
                    dialogBuilderLogoutAccount.setMessage(getString(R.string.logout_account_confirmation, finalAccount.getUsername()));
                    dialogBuilderLogoutAccount.setPositiveButton(R.string.action_logout, (dialog, id) -> {
                        Helper.logoutCurrentUser(LoginActivity.this, finalAccount);
                        dialog.dismiss();
                    });
                    dialogBuilderLogoutAccount.setNegativeButton(R.string.cancel, (dialog, id) -> dialog.dismiss());
                    AlertDialog alertDialogLogoutAccount = dialogBuilderLogoutAccount.create();
                    alertDialogLogoutAccount.show();
                });
            } else {
                Helper.logoutCurrentUser(LoginActivity.this, null);
            }

            max_id = null;
            firstLoad = true;
            flag_loading = true;
            notifications = new ArrayList<>();
            swiped = false;
            swipeRefreshLayout = findViewById(R.id.swipeContainer);

            RecyclerView lv_notifications = findViewById(R.id.lv_notifications);
            mainLoader = findViewById(R.id.loader);
            nextElementLoader = findViewById(R.id.loading_next_notifications);
            textviewNoAction = findViewById(R.id.no_action);
            mainLoader.setVisibility(View.VISIBLE);
            nextElementLoader.setVisibility(View.GONE);
            notificationsListAdapter = new PeertubeNotificationsListAdapter(this.notifications);
            lv_notifications.setAdapter(notificationsListAdapter);
            mLayoutManager = new LinearLayoutManager(LoginActivity.this);
            lv_notifications.setLayoutManager(mLayoutManager);
            lv_notifications.addOnScrollListener(new RecyclerView.OnScrollListener() {
                public void onScrolled(@NotNull RecyclerView recyclerView, int dx, int dy) {
                    if (dy > 0) {
                        int visibleItemCount = mLayoutManager.getChildCount();
                        int totalItemCount = mLayoutManager.getItemCount();
                        int firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
                        if (firstVisibleItem + visibleItemCount == totalItemCount) {
                            if (!flag_loading) {
                                flag_loading = true;
                                asyncTask = new RetrievePeertubeNotificationsAsyncTask(LoginActivity.this, null, max_id, LoginActivity.this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                                nextElementLoader.setVisibility(View.VISIBLE);
                            }
                        } else {
                            nextElementLoader.setVisibility(View.GONE);
                        }
                    }
                }
            });


            swipeRefreshLayout.setOnRefreshListener(() -> {
                max_id = null;
                firstLoad = true;
                flag_loading = true;
                swiped = true;
                asyncTask = new RetrievePeertubeNotificationsAsyncTask(LoginActivity.this, null, null, LoginActivity.this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
            });
            asyncTask = new RetrievePeertubeNotificationsAsyncTask(LoginActivity.this, null, max_id, LoginActivity.this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
        } else {
            connected.setVisibility(View.GONE);
            not_connected.setVisibility(View.VISIBLE);
        }


        connectionButton.setOnClickListener(v -> {

            if (!android.util.Patterns.EMAIL_ADDRESS.matcher(login_uid.getText().toString().trim()).matches()) {
                Toasty.error(LoginActivity.this, getString(R.string.email_error)).show();
                return;
            }
            String[] emailArray = login_uid.getText().toString().split("@");
            if (emailArray.length > 1 && !Arrays.asList(Helper.valideEmails).contains(emailArray[1])) {
                Toasty.error(LoginActivity.this, getString(R.string.email_error_domain, emailArray[1])).show();
                return;
            }
            String host = emailArray[1];
            String instance = Helper.getPeertubeUrl(host);
            final HashMap<String, String> parameters = new HashMap<>();
            connectionButton.setEnabled(false);

            try {
                instance = URLEncoder.encode(instance, "utf-8");
            } catch (UnsupportedEncodingException e) {
                Toasty.error(LoginActivity.this, getString(R.string.client_error), Toast.LENGTH_LONG).show();
            }
            actionToken = "/api/v1/oauth-clients/local";
            parameters.clear();
            parameters.put(Helper.CLIENT_NAME, Helper.CLIENT_NAME_VALUE);
            parameters.put(Helper.REDIRECT_URIS, Helper.REDIRECT_CONTENT);
            parameters.put(Helper.SCOPES, Helper.OAUTH_SCOPES_PEERTUBE);
            parameters.put(Helper.WEBSITE, Helper.WEBSITE_VALUE);
            String finalInstance = instance;
            new Thread(() -> {
                try {
                    String response = new HttpsConnection(LoginActivity.this).get("https://" + finalInstance + actionToken, 30, parameters, null);
                    JSONObject resobj;
                    try {
                        resobj = new JSONObject(response);
                        client_id = resobj.get(Helper.CLIENT_ID).toString();
                        client_secret = resobj.get(Helper.CLIENT_SECRET).toString();
                        SharedPreferences sharedpreferences = getSharedPreferences(Helper.APP_PREFS, MODE_PRIVATE);
                        SharedPreferences.Editor editor = sharedpreferences.edit();
                        editor.putString(Helper.CLIENT_ID, client_id);
                        editor.putString(Helper.CLIENT_SECRET, client_secret);
                        editor.apply();
                        parameters.clear();
                        parameters.put(Helper.CLIENT_ID, sharedpreferences.getString(Helper.CLIENT_ID, null));
                        parameters.put(Helper.CLIENT_SECRET, sharedpreferences.getString(Helper.CLIENT_SECRET, null));
                        parameters.put("grant_type", "password");
                        try {
                            parameters.put("username", URLEncoder.encode(login_uid.getText().toString().trim().toLowerCase(), "UTF-8"));
                        } catch (UnsupportedEncodingException e) {
                            parameters.put("username", login_uid.getText().toString().trim().toLowerCase());
                        }
                        try {
                            parameters.put("password", URLEncoder.encode(login_passwd.getText().toString(), "UTF-8"));
                        } catch (UnsupportedEncodingException e) {
                            parameters.put("password", login_passwd.getText().toString());
                        }
                        parameters.put("scope", "user");
                        String oauthUrl = "/api/v1/users/token";
                        try {
                            String responseLogin = new HttpsConnection(LoginActivity.this).post("https://" + finalInstance + oauthUrl, 30, parameters, null);
                            runOnUiThread(() -> {
                                JSONObject resobjLogin;
                                try {
                                    resobjLogin = new JSONObject(responseLogin);
                                    String token = resobjLogin.getString("access_token");
                                    String refresh_token = resobjLogin.getString("refresh_token");
                                    editor.putString(Helper.PREF_KEY_OAUTH_TOKEN, token);
                                    editor.putString(Helper.PREF_INSTANCE, host);
                                    editor.apply();
                                    //Update the account with the token;
                                    new UpdateAccountInfoAsyncTask(LoginActivity.this, token, client_id, client_secret, refresh_token, host).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                                } catch (JSONException e) {
                                    e.printStackTrace();
                                    runOnUiThread(() -> connectionButton.setEnabled(true));
                                }
                            });
                        } catch (final Exception e) {
                            e.printStackTrace();
                            runOnUiThread(() -> {
                                connectionButton.setEnabled(true);
                                String message;
                                if (e.getLocalizedMessage() != null && e.getLocalizedMessage().trim().length() > 0)
                                    message = e.getLocalizedMessage();
                                else if (e.getMessage() != null && e.getMessage().trim().length() > 0)
                                    message = e.getMessage();
                                else
                                    message = getString(R.string.client_error);
                                Toasty.error(LoginActivity.this, message, Toast.LENGTH_LONG).show();
                            });
                        }

                    } catch (JSONException e) {
                        e.printStackTrace();
                        e.printStackTrace();
                        runOnUiThread(() -> connectionButton.setEnabled(true));
                    }
                } catch (final Exception e) {
                    e.printStackTrace();
                    runOnUiThread(() -> {
                        connectionButton.setEnabled(true);
                        String message = null;
                        if (e.getLocalizedMessage() != null) {
                            message = e.getMessage();
                        }
                        if (message == null) {
                            message = getString(R.string.client_error);
                        }
                        Toasty.error(LoginActivity.this, message, Toast.LENGTH_LONG).show();
                    });
                }
            }).start();
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (asyncTask != null && !asyncTask.isCancelled()) {
            asyncTask.cancel(true);
        }
    }


    @Override
    public void onRetrievePeertubeNotifications(APIResponse apiResponse, Account account) {
        mainLoader.setVisibility(View.GONE);
        nextElementLoader.setVisibility(View.GONE);
        if (apiResponse.getError() != null) {
            Toasty.error(LoginActivity.this, apiResponse.getError().getError(), Toast.LENGTH_LONG).show();
            flag_loading = false;
            swipeRefreshLayout.setRefreshing(false);
            swiped = false;
            return;
        }

        int previousPosition = notifications.size();
        max_id = apiResponse.getMax_id();
        List<PeertubeNotification> notifications = apiResponse.getPeertubeNotifications();
        if (!swiped && firstLoad && (notifications == null || notifications.size() == 0))
            textviewNoAction.setVisibility(View.VISIBLE);
        else
            textviewNoAction.setVisibility(View.GONE);
        if (swiped) {
            if (previousPosition > 0) {
                this.notifications.subList(0, previousPosition).clear();
                notificationsListAdapter.notifyItemRangeRemoved(0, previousPosition);
            }
            swiped = false;
        }

        if (notifications != null && notifications.size() > 0) {
            this.notifications.addAll(notifications);
            notificationsListAdapter.notifyItemRangeInserted(previousPosition, notifications.size());
        } else {
            if (firstLoad)
                textviewNoAction.setVisibility(View.VISIBLE);
        }
        swipeRefreshLayout.setRefreshing(false);
        firstLoad = false;
        //The initial call comes from a classic tab refresh
        flag_loading = (max_id == null);
    }

}