/*
 * Copyright 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.server.bluetooth;

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

import static org.junit.Assert.assertThrows;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import android.annotation.SuppressLint;
import android.bluetooth.BluetoothAdapter;
import android.os.Binder;
import android.os.RemoteException;

import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;

import com.android.server.bluetooth.BluetoothShellCommand.BluetoothCommand;

import com.google.common.truth.Expect;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import java.io.FileDescriptor;
import java.io.PrintWriter;

@SmallTest
@RunWith(AndroidJUnit4.class)
@SuppressLint("AndroidFrameworkRequiresPermission")
public class BluetoothShellCommandTest {
    @Rule public final Expect expect = Expect.create();

    @Mock BluetoothManagerService mManagerService;

    @Mock BluetoothServiceBinder mBinder;

    BluetoothShellCommand mShellCommand;

    @Before
    public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);
        doReturn(mBinder).when(mManagerService).getBinder();

        mShellCommand = new BluetoothShellCommand(mManagerService);
        mShellCommand.init(
                mock(Binder.class),
                mock(FileDescriptor.class),
                mock(FileDescriptor.class),
                mock(FileDescriptor.class),
                new String[0],
                -1);
    }

    @After
    public void tearDown() {
        verifyNoMoreInteractions(mBinder);
        // verifyNoMoreInteractions(mManagerService); // TODO(b/280518177): Apply after cleanup
    }

    @Test
    public void enableCommand() throws Exception {
        BluetoothCommand enableCmd = mShellCommand.new Enable();
        String cmdName = "enable";

        assertThat(enableCmd.getName()).isEqualTo(cmdName);
        assertThat(enableCmd.isMatch(cmdName)).isTrue();
        assertThat(enableCmd.isPrivileged()).isFalse();
        when(mBinder.enable(any())).thenReturn(true);
        assertThat(enableCmd.exec(cmdName)).isEqualTo(0);
        verify(mBinder).enable(any());
    }

    @Test
    public void disableCommand() throws Exception {
        BluetoothCommand disableCmd = mShellCommand.new Disable();
        String cmdName = "disable";

        assertThat(disableCmd.getName()).isEqualTo(cmdName);
        assertThat(disableCmd.isMatch(cmdName)).isTrue();
        assertThat(disableCmd.isPrivileged()).isFalse();
        when(mBinder.disable(any(), anyBoolean())).thenReturn(true);
        assertThat(disableCmd.exec(cmdName)).isEqualTo(0);
        verify(mBinder).disable(any(), anyBoolean());
    }

    @Test
    public void waitForStateCommand() throws Exception {
        BluetoothCommand waitCmd = mShellCommand.new WaitForAdapterState();

        expect.that(waitCmd.getName()).isEqualTo("wait-for-state");
        String[] validCmd = {
            "wait-for-state:STATE_OFF", "wait-for-state:STATE_ON",
        };
        for (String m : validCmd) {
            expect.that(waitCmd.isMatch(m)).isTrue();
        }
        String[] falseCmd = {
            "wait-for-stateSTATE_ON", "wait-for-foo:STATE_ON",
        };
        for (String m : falseCmd) {
            expect.that(waitCmd.isMatch(m)).isFalse();
        }
        String[] throwCmd = {
            "wait-for-state:STATE_BLE_TURNING_ON",
            "wait-for-state:STATE_ON:STATE_OFF",
            "wait-for-state::STATE_ON",
            "wait-for-state:STATE_ON:",
        };
        for (String m : throwCmd) {
            assertThrows(m, IllegalArgumentException.class, () -> waitCmd.isMatch(m));
        }

        expect.that(waitCmd.isPrivileged()).isFalse();
        when(mManagerService.waitForManagerState(eq(BluetoothAdapter.STATE_OFF))).thenReturn(true);

        expect.that(waitCmd.exec(validCmd[0])).isEqualTo(0);
    }

    @Test
    public void onCommand_withNullString_callsOnHelp() {
        BluetoothShellCommand command = spy(mShellCommand);

        command.onCommand(null);

        verify(command).onHelp();
    }

    @Test
    public void onCommand_withEnableString_callsEnableCommand() throws Exception {
        BluetoothCommand enableCmd = spy(mShellCommand.new Enable());
        mShellCommand.mBluetoothCommands[0] = enableCmd;

        mShellCommand.onCommand("enable");

        verify(enableCmd).exec(eq("enable"));
        verify(mBinder).enable(any());
    }

    static class TestPrivilegedCmd extends BluetoothCommand {
        TestPrivilegedCmd() {
            super(true, TestPrivilegedCmd.class.getSimpleName());
        }

        @Override
        int exec(String cmd) throws RemoteException {
            return 0;
        }

        @Override
        public void onHelp(PrintWriter pw) {}
    }

    @Test
    public void onCommand_withPrivilegedCommandName_throwsSecurityException() {
        mShellCommand.mBluetoothCommands[0] = new TestPrivilegedCmd();

        assertThrows(
                SecurityException.class,
                () -> mShellCommand.onCommand(TestPrivilegedCmd.class.getSimpleName()));
    }
}