/*
 * Copyright (C) 2015 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.tv.dvr;

import static com.android.tv.testing.dvr.RecordingTestUtils.createTestRecordingWithIdAndPeriod;
import static com.android.tv.testing.dvr.RecordingTestUtils.normalizePriority;

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

import android.os.Build;
import android.util.Range;

import com.android.tv.data.ChannelImpl;
import com.android.tv.data.ProgramImpl;
import com.android.tv.data.api.Channel;
import com.android.tv.data.api.Program;
import com.android.tv.dvr.data.ScheduledRecording;
import com.android.tv.testing.TestSingletonApp;
import com.android.tv.testing.dvr.RecordingTestUtils;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

/** Tests for {@link ScheduledRecordingTest} */
@RunWith(RobolectricTestRunner.class)
@Config(sdk = Build.VERSION_CODES.N, application = TestSingletonApp.class)
public class ScheduledRecordingTest {
    private static final String INPUT_ID = "input_id";
    private static final int CHANNEL_ID = 273;

    @Test
    public void testIsOverLapping() {
        ScheduledRecording r =
                createTestRecordingWithIdAndPeriod(1, INPUT_ID, CHANNEL_ID, 10L, 20L);
        assertOverLapping(false, 1L, 9L, r);

        assertOverLapping(true, 1L, 20L, r);
        assertOverLapping(false, 1L, 10L, r);
        assertOverLapping(true, 10L, 19L, r);
        assertOverLapping(true, 10L, 20L, r);
        assertOverLapping(true, 11L, 20L, r);
        assertOverLapping(true, 11L, 21L, r);
        assertOverLapping(false, 20L, 21L, r);

        assertOverLapping(false, 21L, 29L, r);
    }

    @Test
    public void testBuildProgram() {
        Channel c = new ChannelImpl.Builder().build();
        Program p = new ProgramImpl.Builder().build();
        ScheduledRecording actual =
                ScheduledRecording.builder(INPUT_ID, p).setChannelId(c.getId()).build();
        assertWithMessage("type").that(actual.getType()).isEqualTo(ScheduledRecording.TYPE_PROGRAM);
    }

    @Test
    public void testBuildTime() {
        ScheduledRecording actual =
                createTestRecordingWithIdAndPeriod(1, INPUT_ID, CHANNEL_ID, 10L, 20L);
        assertWithMessage("type").that(actual.getType()).isEqualTo(ScheduledRecording.TYPE_TIMED);
    }

    @Test
    public void testBuildFrom() {
        ScheduledRecording expected =
                createTestRecordingWithIdAndPeriod(1, INPUT_ID, CHANNEL_ID, 10L, 20L);
        ScheduledRecording actual = ScheduledRecording.buildFrom(expected).build();
        RecordingTestUtils.assertRecordingEquals(expected, actual);
    }

    @Test
    public void testBuild_priority() {
        ScheduledRecording a =
                normalizePriority(
                        createTestRecordingWithIdAndPeriod(1, INPUT_ID, CHANNEL_ID, 10L, 20L));
        ScheduledRecording b =
                normalizePriority(
                        createTestRecordingWithIdAndPeriod(2, INPUT_ID, CHANNEL_ID, 10L, 20L));
        ScheduledRecording c =
                normalizePriority(
                        createTestRecordingWithIdAndPeriod(3, INPUT_ID, CHANNEL_ID, 10L, 20L));

        // default priority
        assertThat(sortByPriority(c, b, a)).containsExactly(a, b, c).inOrder();

        // make A preferred over B
        a = ScheduledRecording.buildFrom(a).setPriority(b.getPriority() + 2).build();
        assertThat(sortByPriority(a, b, c)).containsExactly(b, c, a).inOrder();
    }

    public Collection<ScheduledRecording> sortByPriority(
            ScheduledRecording a, ScheduledRecording b, ScheduledRecording c) {
        List<ScheduledRecording> list = Arrays.asList(a, b, c);
        Collections.sort(list, ScheduledRecording.PRIORITY_COMPARATOR);
        return list;
    }

    private void assertOverLapping(boolean expected, long lower, long upper, ScheduledRecording r) {
        assertWithMessage("isOverlapping(Range(" + lower + "," + upper + "), recording " + r)
                .that(r.isOverLapping(new Range<>(lower, upper)))
                .isEqualTo(expected);
    }
}