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package org.wordpress.android.ui.accounts;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.Window;

import com.google.android.gms.auth.api.credentials.Credential;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;

import org.wordpress.android.R;
import org.wordpress.android.WordPress;
import org.wordpress.android.analytics.AnalyticsTracker;
import org.wordpress.android.analytics.AnalyticsTracker.Stat;
import org.wordpress.android.models.Blog;
import org.wordpress.android.ui.ActivityId;
import org.wordpress.android.ui.accounts.SmartLockHelper.Callback;
import org.wordpress.android.util.AppLog;
import org.wordpress.android.util.AppLog.T;

public class SignInActivity extends AppCompatActivity implements ConnectionCallbacks, OnConnectionFailedListener {
    public static final int SIGN_IN_REQUEST = 1;
    public static final int REQUEST_CODE = 5000;
    public static final int ADD_SELF_HOSTED_BLOG = 2;
    public static final int SHOW_CERT_DETAILS = 4;
    public static final int SMART_LOCK_SAVE = 5;
    public static final int SMART_LOCK_READ = 6;

    public static final String EXTRA_START_FRAGMENT = "start-fragment";
    public static final String EXTRA_JETPACK_SITE_AUTH = "EXTRA_JETPACK_SITE_AUTH";
    public static final String EXTRA_JETPACK_MESSAGE_AUTH = "EXTRA_JETPACK_MESSAGE_AUTH";
    public static final String EXTRA_IS_AUTH_ERROR = "EXTRA_IS_AUTH_ERROR";
    public static final String EXTRA_PREFILL_URL = "EXTRA_PREFILL_URL";

    private SmartLockHelper mSmartLockHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.welcome_activity);

        String action = getIntent().getAction();
        Uri data = getIntent().getData();

        if (Intent.ACTION_VIEW.equals(action) && data != null) {
            if (data.getBooleanQueryParameter("selfhosted", false)) {
                getIntent().putExtra(SignInActivity.EXTRA_START_FRAGMENT, SignInActivity.ADD_SELF_HOSTED_BLOG);
                if (data.getQueryParameter("url") != null) {
                    getIntent().putExtra(EXTRA_PREFILL_URL, data.getQueryParameter("url"));
                }
            }
        }

        if (savedInstanceState == null) {
            addSignInFragment();
        }

        mSmartLockHelper = new SmartLockHelper(this);
        mSmartLockHelper.initSmartLockForPasswords();

        ActivityId.trackLastActivity(ActivityId.LOGIN);
    }

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

    protected void addSignInFragment() {
        SignInFragment signInFragment = new SignInFragment();
        FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fragment_container, signInFragment, SignInFragment.TAG);
        fragmentTransaction.commit();
    }

    protected void actionMode(Bundle extras) {
        int actionMode = SIGN_IN_REQUEST;
        String prefillUrl = "";
        if (extras != null) {
            actionMode = extras.getInt(EXTRA_START_FRAGMENT, -1);
            if (extras.containsKey(EXTRA_JETPACK_SITE_AUTH)) {
                Blog jetpackBlog = WordPress.getBlog(extras.getInt(EXTRA_JETPACK_SITE_AUTH));
                if (jetpackBlog != null) {
                    String customMessage = extras.getString(EXTRA_JETPACK_MESSAGE_AUTH, null);
                    getSignInFragment().setBlogAndCustomMessageForJetpackAuth(jetpackBlog, customMessage);
                }
            } else if (extras.containsKey(EXTRA_IS_AUTH_ERROR)) {
                getSignInFragment().showAuthErrorMessage();
            }
            prefillUrl = extras.getString(EXTRA_PREFILL_URL, "");
        }
        switch (actionMode) {
            case ADD_SELF_HOSTED_BLOG:
                getSignInFragment().forceSelfHostedMode(prefillUrl);
                break;
            default:
                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == SHOW_CERT_DETAILS) {
            getSignInFragment().askForSslTrust();
        } else if (requestCode == SMART_LOCK_SAVE) {
            if (resultCode == RESULT_OK) {
                AnalyticsTracker.track(Stat.LOGIN_AUTOFILL_CREDENTIALS_UPDATED);
                AppLog.d(T.NUX, "Credentials saved");
            } else {
                AppLog.d(T.NUX, "Credentials save cancelled");
            }
        } else if (requestCode == SMART_LOCK_READ) {
            if (resultCode == RESULT_OK) {
                AppLog.d(T.NUX, "Credentials retrieved");
                Credential credential = data.getParcelableExtra(Credential.EXTRA_KEY);
                SignInFragment signInFragment =
                        (SignInFragment) getSupportFragmentManager().findFragmentByTag(SignInFragment.TAG);
                if (signInFragment != null) {
                    signInFragment.onCredentialRetrieved(credential);
                }
            } else {
                AppLog.e(T.NUX, "Credential read failed");
            }
        }
    }

    public SignInFragment getSignInFragment() {
        SignInFragment signInFragment = (SignInFragment) getSupportFragmentManager().findFragmentByTag(SignInFragment.TAG);
        if (signInFragment == null) {
            return new SignInFragment();
        } else {
            return signInFragment;
        }
    }

    public SmartLockHelper getSmartLockHelper() {
        return mSmartLockHelper;
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        AppLog.d(T.NUX, "Connection result: " + connectionResult);
    }

    @Override
    public void onConnected(Bundle bundle) {
        AppLog.d(T.NUX, "Google API client connected");
        SignInFragment signInFragment =
                (SignInFragment) getSupportFragmentManager().findFragmentByTag(SignInFragment.TAG);
        // Autofill only if signInFragment is there and if it can be autofilled (ie. username and password fields are
        // empty).
        if (signInFragment != null && signInFragment.canAutofillUsernameAndPassword()) {
            mSmartLockHelper.smartLockAutoFill(new Callback() {
                @Override
                public void onCredentialRetrieved(Credential credential) {
                    SignInFragment signInFragment =
                            (SignInFragment) getSupportFragmentManager().findFragmentByTag(SignInFragment.TAG);
                    if (signInFragment != null) {
                        signInFragment.onCredentialRetrieved(credential);
                    }
                }
            });
        }
    }

    @Override
    public void onConnectionSuspended(int i) {
        AppLog.d(T.NUX, "Google API client connection suspended");
    }
}