/*
 * 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 tech.tablesaw.columns.dates;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static tech.tablesaw.columns.dates.PackedLocalDate.asLocalDate;
import static tech.tablesaw.columns.dates.PackedLocalDate.minusDays;
import static tech.tablesaw.columns.dates.PackedLocalDate.pack;
import static tech.tablesaw.columns.dates.PackedLocalDate.plusDays;

import java.time.LocalDate;
import java.time.Month;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import tech.tablesaw.api.DateColumn;
import tech.tablesaw.api.IntColumn;
import tech.tablesaw.api.StringColumn;
import tech.tablesaw.api.Table;
import tech.tablesaw.selection.Selection;

public class DateFiltersTest {

  private DateColumn localDateColumn = DateColumn.create("testing");
  private Table table = Table.create("test");

  @BeforeEach
  public void setUp() {
    localDateColumn.append(LocalDate.of(2016, 2, 28)); // sunday
    localDateColumn.append(LocalDate.of(2016, 2, 29)); // monday
    localDateColumn.append(LocalDate.of(2016, 3, 1)); // tues
    localDateColumn.append(LocalDate.of(2016, 3, 2)); // weds
    localDateColumn.append(LocalDate.of(2016, 3, 3)); // thurs
    localDateColumn.append(LocalDate.of(2016, 4, 1));
    localDateColumn.append(LocalDate.of(2016, 4, 2));
    localDateColumn.append(LocalDate.of(2016, 3, 4)); // fri
    localDateColumn.append(LocalDate.of(2016, 3, 5)); // sat
    table.addColumns(localDateColumn);
  }

  @Test
  public void testDow() {

    assertTrue(localDateColumn.isSunday().contains(0));
    assertTrue(localDateColumn.isMonday().contains(1));
    assertTrue(localDateColumn.isTuesday().contains(2));
    assertTrue(localDateColumn.isWednesday().contains(3));
    assertTrue(localDateColumn.isThursday().contains(4));
    assertTrue(localDateColumn.isFriday().contains(7));
    assertTrue(localDateColumn.isSaturday().contains(8));
  }

  @Test
  public void testIsFirstDayOfTheMonth() {
    Selection selection = localDateColumn.isFirstDayOfMonth();
    assertFalse(selection.contains(0));
    assertFalse(selection.contains(1));
    assertTrue(selection.contains(2));
    assertTrue(selection.contains(5));
    assertFalse(selection.contains(6));
  }

  @Test
  public void testIsLastDayOfTheMonth() {
    Selection selection = localDateColumn.isLastDayOfMonth();
    assertFalse(selection.contains(0));
    assertTrue(selection.contains(1));
    assertFalse(selection.contains(2));
  }

  @Test
  public void testIsInYear() {
    Selection selection = localDateColumn.isInYear(2016);
    assertTrue(selection.contains(0));
    assertTrue(selection.contains(1));
    assertTrue(selection.contains(2));

    selection = localDateColumn.isInYear(2015);
    assertFalse(selection.contains(0));
    assertFalse(selection.contains(1));
    assertFalse(selection.contains(2));
  }

  @Test
  public void testGetMonthValue() {
    LocalDate date = LocalDate.of(2015, 1, 25);
    Month[] months = Month.values();

    DateColumn dateColumn = DateColumn.create("test");
    for (int i = 0; i < months.length; i++) {
      dateColumn.append(date);
      date = date.plusMonths(1);
    }

    StringColumn month = dateColumn.month();
    IntColumn monthValue = dateColumn.monthValue();

    for (int i = 0; i < months.length; i++) {
      assertEquals(months[i].name(), month.get(i).toUpperCase());
      assertEquals(i + 1, monthValue.get(i), 0.001);
    }

    assertTrue(dateColumn.isInJanuary().contains(0));
    assertTrue(dateColumn.isInFebruary().contains(1));
    assertTrue(dateColumn.isInMarch().contains(2));
    assertTrue(dateColumn.isInApril().contains(3));
    assertTrue(dateColumn.isInMay().contains(4));
    assertTrue(dateColumn.isInJune().contains(5));
    assertTrue(dateColumn.isInJuly().contains(6));
    assertTrue(dateColumn.isInAugust().contains(7));
    assertTrue(dateColumn.isInSeptember().contains(8));
    assertTrue(dateColumn.isInOctober().contains(9));
    assertTrue(dateColumn.isInNovember().contains(10));
    assertTrue(dateColumn.isInDecember().contains(11));

    assertTrue(dateColumn.isInQ1().contains(2));
    assertTrue(dateColumn.isInQ2().contains(4));
    assertTrue(dateColumn.isInQ3().contains(8));
    assertTrue(dateColumn.isInQ4().contains(11));

    Table t = Table.create("Test");
    t.addColumns(dateColumn);
    IntColumn index = IntColumn.indexColumn("index", t.rowCount(), 0);
    t.addColumns(index);

    assertTrue(t.where(t.dateColumn("test").isInJanuary()).intColumn("index").contains(0));
    assertTrue(t.where(t.dateColumn("test").isInFebruary()).intColumn("index").contains(1));
    assertTrue(t.where(t.dateColumn("test").isInMarch()).intColumn("index").contains(2));
    assertTrue(t.where(t.dateColumn("test").isInApril()).intColumn("index").contains(3));
    assertTrue(t.where(t.dateColumn("test").isInMay()).intColumn("index").contains(4));
    assertTrue(t.where(t.dateColumn("test").isInJune()).intColumn("index").contains(5));
    assertTrue(t.where(t.dateColumn("test").isInJuly()).intColumn("index").contains(6));
    assertTrue(t.where(t.dateColumn("test").isInAugust()).intColumn("index").contains(7));
    assertTrue(t.where(t.dateColumn("test").isInSeptember()).intColumn("index").contains(8));
    assertTrue(t.where(t.dateColumn("test").isInOctober()).intColumn("index").contains(9));
    assertTrue(t.where(t.dateColumn("test").isInNovember()).intColumn("index").contains(10));
    assertTrue(t.where(t.dateColumn("test").isInDecember()).intColumn("index").contains(11));

    assertTrue(t.where(t.dateColumn("test").isInQ1()).intColumn("index").contains(2));
    assertTrue(t.where(t.dateColumn("test").isInQ2()).intColumn("index").contains(4));
    assertTrue(t.where(t.dateColumn("test").isInQ3()).intColumn("index").contains(8));
    assertTrue(t.where(t.dateColumn("test").isInQ4()).intColumn("index").contains(11));
  }

  @Test
  public void testComparison() {
    LocalDate date = LocalDate.of(2015, 1, 25);
    int packed = pack(date);

    DateColumn dateColumn = DateColumn.create("test");

    int before = minusDays(1, packed);
    int after = plusDays(1, packed);

    LocalDate beforeDate = asLocalDate(before);
    LocalDate afterDate = asLocalDate(after);

    dateColumn.appendInternal(before);
    dateColumn.appendInternal(packed);
    dateColumn.appendInternal(after);

    assertTrue(dateColumn.isBefore(packed).contains(0));
    assertTrue(dateColumn.isBefore(date).contains(0));
    assertTrue(dateColumn.isOnOrBefore(date).contains(0));

    assertTrue(dateColumn.isEqualTo(packed).contains(1));
    assertTrue(dateColumn.isEqualTo(date).contains(1));
    assertTrue(dateColumn.isOnOrBefore(date).contains(1));
    assertTrue(dateColumn.isOnOrAfter(date).contains(1));

    assertFalse(dateColumn.isOnOrBefore(date).contains(2));
    assertTrue(dateColumn.isAfter(packed).contains(2));
    assertTrue(dateColumn.isAfter(date).contains(2));
    assertTrue(dateColumn.isOnOrAfter(date).contains(2));

    assertTrue(dateColumn.isBetweenExcluding(beforeDate, afterDate).contains(1));
    assertTrue(dateColumn.isBetweenIncluding(beforeDate, afterDate).contains(2));
    assertTrue(dateColumn.isBetweenIncluding(beforeDate, afterDate).contains(0));
    assertFalse(dateColumn.isBetweenExcluding(beforeDate, afterDate).contains(2));
    assertFalse(dateColumn.isBetweenExcluding(beforeDate, afterDate).contains(0));

    IntColumn index = IntColumn.indexColumn("index", dateColumn.size(), 0);
    Table t = Table.create("test", dateColumn, index);

    assertTrue(t.where(dateColumn.isBefore(packed)).intColumn("index").contains(0));
    assertTrue(t.where(dateColumn.isEqualTo(packed)).intColumn("index").contains(1));
    assertTrue(t.where(dateColumn.isAfter(packed)).intColumn("index").contains(2));
    assertTrue(
        t.where(t.dateColumn("test").isBetweenExcluding(beforeDate, afterDate))
            .intColumn("index")
            .contains(1));
    assertTrue(
        t.where(t.dateColumn("test").isBetweenIncluding(beforeDate, afterDate))
            .intColumn("index")
            .contains(2));
    assertTrue(
        t.where(t.dateColumn("test").isBetweenIncluding(beforeDate, afterDate))
            .intColumn("index")
            .contains(0));
    assertFalse(
        t.where(t.dateColumn("test").isBetweenExcluding(beforeDate, afterDate))
            .intColumn("index")
            .contains(2));
    assertFalse(
        t.where(t.dateColumn("test").isBetweenExcluding(beforeDate, afterDate))
            .intColumn("index")
            .contains(0));
  }

  @Test
  public void testIsMissing() {
    DateColumn column = DateColumn.create("test");
    column.append(LocalDate.now());
    column.appendInternal(DateColumnType.missingValueIndicator());

    assertTrue(column.isMissing().contains(1));
    assertTrue(column.isNotMissing().contains(0));
    assertTrue(column.isNotMissing().contains(0));
    assertTrue(column.isMissing().contains(1));
  }

  @Test
  public void testColumnComparisons() {
    LocalDate dateTime = LocalDate.of(2015, 1, 25);
    DateColumn dateColumn = DateColumn.create("test");

    LocalDate beforeDate = dateTime.minusDays(1);
    LocalDate afterDate = dateTime.plusDays(1);

    dateColumn.append(beforeDate);
    dateColumn.append(dateTime);
    dateColumn.append(afterDate);

    DateColumn same = DateColumn.create("same");
    same.append(beforeDate);
    same.append(dateTime);
    same.append(afterDate);

    DateColumn before = DateColumn.create("before");
    before.append(beforeDate.minusDays(1));
    before.append(dateTime.minusDays(1));
    before.append(afterDate.minusDays(1));

    DateColumn after = DateColumn.create("after");
    after.append(beforeDate.plusDays(1));
    after.append(dateTime.plusDays(1));
    after.append(afterDate.plusDays(1));

    Table t = Table.create("test", dateColumn, same, before, after);

    assertTrue(dateColumn.isOnOrAfter(same).contains(0));
    assertTrue(t.dateColumn("test").isOnOrAfter(same).contains(0));
    assertTrue(t.dateColumn("test").isOnOrAfter(t.dateColumn("same")).contains(0));

    assertTrue(dateColumn.isOnOrBefore(same).contains(0));
    assertTrue(t.dateColumn("test").isOnOrBefore(same).contains(0));
    assertTrue(t.dateColumn("test").isOnOrBefore(t.dateColumn("same")).contains(0));

    assertTrue(dateColumn.isEqualTo(same).contains(0));
    assertTrue(t.dateColumn("test").isEqualTo(same).contains(0));
    assertTrue(t.dateColumn("test").isEqualTo(t.dateColumn("same")).contains(0));

    assertTrue(dateColumn.isBefore(after).contains(0));
    assertFalse(dateColumn.isOnOrAfter(after).contains(0));
    assertTrue(t.dateColumn("test").isBefore(after).contains(0));
    assertTrue(t.dateColumn("test").isBefore(t.dateColumn("after")).contains(0));

    assertTrue(dateColumn.isAfter(before).contains(0));
    assertFalse(dateColumn.isOnOrBefore(before).contains(0));
    assertTrue(t.dateColumn("test").isAfter(before).contains(0));
    assertTrue(t.dateColumn("test").isAfter(t.dateColumn("before")).contains(0));

    assertFalse(dateColumn.isNotEqualTo(same).contains(0));
    assertFalse(t.dateColumn("test").isNotEqualTo(same).contains(0));
    assertFalse(t.dateColumn("test").isNotEqualTo(t.dateColumn("same")).contains(0));

    assertTrue(dateColumn.isOnOrBefore(same).contains(0));
    assertTrue(dateColumn.isOnOrBefore(after).contains(0));
    assertFalse(dateColumn.isOnOrBefore(before).contains(0));
    assertTrue(dateColumn.isNotEqualTo(before).contains(0));

    assertTrue(dateColumn.isOnOrAfter(same).contains(1));
    assertTrue(dateColumn.isOnOrAfter(before).contains(2));
    assertFalse(dateColumn.isOnOrAfter(after).contains(2));
    assertTrue(dateColumn.isNotEqualTo(after).contains(0));

    /*
            assertTrue(t.dateColumn("test")
                    .isOnOrAfter(t.dateColumn("same")).contains(0));
            assertTrue(t.dateColumn("test")
                    .isOnOrAfter(same).contains(0));

            assertFalse(t.dateColumn("test")
                    .isOnOrAfter(t.dateColumn("after")).contains(0));
            assertFalse(t.dateColumn("test")
                    .isOnOrAfter(after).contains(0));

            assertTrue(t.dateColumn("test")
                    .isOnOrBefore(t.dateColumn("same")).contains(0));
            assertTrue(t.dateColumn("test")
                    .isOnOrBefore(same).contains(0));

            assertTrue(t.dateColumn("test")
                    .isOnOrBefore(t.dateColumn("after")).contains(0));
            assertTrue(t.dateColumn("test")
                    .isOnOrBefore(after).contains(0));

            assertFalse(t.dateColumn("test")
                    .isOnOrBefore(t.dateColumn("before")).contains(0));
            assertFalse(t.dateColumn("test")
                    .isOnOrBefore(before).contains(0));
    */

    assertTrue(t.dateColumn("test").isNotEqualTo(t.dateColumn("before")).contains(0));
    assertTrue(t.dateColumn("test").isNotEqualTo(before).contains(0));
    assertFalse(t.dateColumn("test").isNotEqualTo(t.dateColumn("same")).contains(0));
    assertFalse(t.dateColumn("test").isNotEqualTo(same).contains(0));
  }
}
