/*
 * Copyright (C) 2022 The Android Open Source Project
 *
 * 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 com.android.bedstead.nene.bluetooth;

import static android.os.Build.VERSION_CODES.R;

import static com.android.bedstead.nene.permissions.CommonPermissions.BLUETOOTH;
import static com.android.bedstead.nene.permissions.CommonPermissions.BLUETOOTH_CONNECT;
import static com.android.bedstead.nene.permissions.CommonPermissions.INTERACT_ACROSS_USERS_FULL;
import static com.android.bedstead.nene.permissions.CommonPermissions.NETWORK_SETTINGS;
import static com.android.bedstead.nene.utils.Versions.T;

import static com.google.common.truth.Truth.assertThat;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;

import com.android.bedstead.nene.TestApis;
import com.android.bedstead.nene.logging.Logger;
import com.android.bedstead.nene.permissions.PermissionContext;
import com.android.bedstead.nene.utils.Poll;
import com.android.compatibility.common.util.BlockingBroadcastReceiver;

/** Test APIs related to bluetooth. */
public final class Bluetooth {

    public static final Bluetooth sInstance = new Bluetooth();

    private static final Context sContext = TestApis.context().instrumentedContext();
    private static final BluetoothManager sBluetoothManager =
            sContext.getSystemService(BluetoothManager.class);
    private static final BluetoothAdapter sBluetoothAdapter = sBluetoothManager.getAdapter();

    private final Logger mLogger = Logger.forInstance(this);

    private Bluetooth() {
        mLogger.constructor();
    }

    /** Enable or disable bluetooth on the device. */
    public void setEnabled(boolean enabled) {
        mLogger.method("setEnabled", enabled, () -> {
            if (isEnabled() == enabled) {
                return;
            }

            if (enabled) {
                enable();
            } else {
                disable();
            }
        });
    }

    private void enable() {
        mLogger.method("enable", () -> {
            try (PermissionContext p =
                         TestApis.permissions()
                                 .withPermission(BLUETOOTH_CONNECT, INTERACT_ACROSS_USERS_FULL)
                                 .withPermissionOnVersionAtLeast(T, NETWORK_SETTINGS)) {
                BlockingBroadcastReceiver r = BlockingBroadcastReceiver.create(
                        sContext,
                        BluetoothAdapter.ACTION_STATE_CHANGED,
                        this::isStateEnabled).register();

                try {
                    assertThat(sBluetoothAdapter.enable()).isTrue();

                    r.awaitForBroadcast();
                    Poll.forValue("Bluetooth Enabled", this::isEnabled)
                            .toBeEqualTo(true)
                            .errorOnFail()
                            .await();
                } finally {
                    r.unregisterQuietly();
                }
            }
        });
    }

    private void disable() {
        mLogger.method("disable", () -> {
            try (PermissionContext p =
                         TestApis.permissions()
                                 .withPermission(BLUETOOTH_CONNECT, INTERACT_ACROSS_USERS_FULL)
                                 .withPermissionOnVersionAtLeast(T, NETWORK_SETTINGS)) {
                BlockingBroadcastReceiver r = BlockingBroadcastReceiver.create(
                        sContext,
                        BluetoothAdapter.ACTION_STATE_CHANGED,
                        this::isStateDisabled).register();

                try {
                    assertThat(sBluetoothAdapter.disable()).isTrue();

                    r.awaitForBroadcast();
                    Poll.forValue("Bluetooth Enabled", this::isEnabled)
                            .toBeEqualTo(false)
                            .errorOnFail()
                            .await();
                } finally {
                    r.unregisterQuietly();
                }
            }
        });
    }

    /** {@code true} if bluetooth is enabled. */
    public boolean isEnabled() {
        return mLogger.method("isEnabled", () -> {
            try (PermissionContext p =
                         TestApis.permissions().withPermissionOnVersionAtMost(R, BLUETOOTH)) {
                return sBluetoothAdapter.isEnabled();
            }
        });
    }

    private boolean isStateEnabled(Intent intent) {
        return mLogger.method("isStateEnabled", intent, () ->
                intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1)
                        == BluetoothAdapter.STATE_ON);
    }

    private boolean isStateDisabled(Intent intent) {
        return mLogger.method("isStateDisabled", intent, () ->
                intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1)
                        == BluetoothAdapter.STATE_OFF);
    }
}