/*
 * Copyright (C) 2013-2017 microG Project Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.microg.gms.auth.loginservice;

import static android.accounts.AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE;
import static android.accounts.AccountManager.KEY_ACCOUNT_NAME;
import static android.accounts.AccountManager.KEY_ACCOUNT_TYPE;
import static android.accounts.AccountManager.KEY_ANDROID_PACKAGE_NAME;
import static android.accounts.AccountManager.KEY_AUTHTOKEN;
import static android.accounts.AccountManager.KEY_BOOLEAN_RESULT;
import static android.accounts.AccountManager.KEY_CALLER_PID;
import static android.accounts.AccountManager.KEY_CALLER_UID;
import static android.accounts.AccountManager.KEY_INTENT;

import android.accounts.AbstractAccountAuthenticator;
import android.accounts.Account;
import android.accounts.AccountAuthenticatorResponse;
import android.accounts.AccountManager;
import android.accounts.NetworkErrorException;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

import org.microg.gms.auth.AuthConstants;
import org.microg.gms.auth.AuthManager;
import org.microg.gms.auth.AuthResponse;
import org.microg.gms.auth.login.LoginActivity;
import org.microg.gms.common.PackageUtils;

import java.util.Arrays;
import java.util.List;

class AccountAuthenticator extends AbstractAccountAuthenticator {
    private static final String TAG = "GmsAuthenticator";
    private final Context context;
    private final String accountType;

    public AccountAuthenticator(Context context) {
        super(context);
        this.context = context;
        this.accountType = AuthConstants.DEFAULT_ACCOUNT_TYPE;
    }

    @Override
    public Bundle editProperties(AccountAuthenticatorResponse response, String accountType) {
        Log.d(TAG, "editProperties: " + accountType);
        return null;
    }

    @Override
    public Bundle addAccount(AccountAuthenticatorResponse response, String accountType, String authTokenType, String[] requiredFeatures, Bundle options) throws NetworkErrorException {
        if (accountType.equals(this.accountType)) {
            final Intent i = new Intent(context, LoginActivity.class);
            i.putExtras(options);
            i.putExtra(LoginActivity.EXTRA_TMPL, LoginActivity.TMPL_NEW_ACCOUNT);
            i.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
            final Bundle result = new Bundle();
            result.putParcelable(KEY_INTENT, i);
            return result;
        }
        return null;
    }

    @Override
    public Bundle confirmCredentials(AccountAuthenticatorResponse response, Account account, Bundle options) throws NetworkErrorException {
        Log.d(TAG, "confirmCredentials: " + account + ", " + options);
        return null;
    }

    @Override
    public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) throws NetworkErrorException {
        options.keySet();
        Log.d(TAG, "getAuthToken: " + account + ", " + authTokenType + ", " + options);
        String app = options.getString(KEY_ANDROID_PACKAGE_NAME);
        app = PackageUtils.getAndCheckPackage(context, app, options.getInt(KEY_CALLER_UID), options.getInt(KEY_CALLER_PID));
        AuthManager authManager = new AuthManager(context, account.name, app, authTokenType);
        try {
            AuthResponse res = authManager.requestAuth(true);
            if (res.auth != null) {
                Log.d(TAG, "getAuthToken: " + res.auth);
                Bundle result = new Bundle();
                result.putString(KEY_ACCOUNT_TYPE, account.type);
                result.putString(KEY_ACCOUNT_NAME, account.name);
                result.putString(KEY_AUTHTOKEN, res.auth);
                return result;
            }
        } catch (Exception e) {
            Log.w(TAG, e);
            return null;
        }
        return null;
    }

    @Override
    public String getAuthTokenLabel(String authTokenType) {
        Log.d(TAG, "getAuthTokenLabel: " + authTokenType);
        return null;
    }

    @Override
    public Bundle updateCredentials(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) throws NetworkErrorException {
        Log.d(TAG, "updateCredentials: " + account + ", " + authTokenType + ", " + options);
        return null;
    }

    @Override
    public Bundle hasFeatures(AccountAuthenticatorResponse response, Account account, String[] features) throws NetworkErrorException {
        Log.d(TAG, "hasFeatures: " + account + ", " + Arrays.toString(features));
        AccountManager accountManager = AccountManager.get(context);
        String services = accountManager.getUserData(account, "services");
        boolean res = true;
        if (services != null) {
            List<String> servicesList = Arrays.asList(services.split(","));
            for (String feature : features) {
                if (feature.startsWith("service_") && !servicesList.contains(feature.substring(8))) {
                    res = false;
                    break;
                }
            }
        } else {
            res = false;
        }
        Bundle result = new Bundle();
        result.putBoolean(KEY_BOOLEAN_RESULT, res);
        return result;
    }
}