package appointmentplanner;

import static org.assertj.core.api.Assertions.assertThat;

import java.time.Duration;
import java.time.Instant;
import java.util.List;
import java.util.stream.Stream;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

import appointmentplanner.api.LocalDay;
import appointmentplanner.api.LocalDayPlan;
import appointmentplanner.api.TimeSlot;

public class LocalDayPlanTest {

  private static Stream<Arguments> provideLocalDPDataset() {
    return Stream.of(
        Arguments.of(new LocalDay(), Instant.parse("2023-01-01T08:30:00Z"), Instant.parse("2023-01-01T17:30:00Z")),
        Arguments.of(new LocalDay(), Instant.parse("2023-06-15T09:00:00Z"), Instant.parse("2023-06-15T18:00:00Z")),
        Arguments.of(new LocalDay(), Instant.parse("2024-12-31T07:00:00Z"), Instant.parse("2024-12-31T16:00:00Z")));
  }

  @ParameterizedTest
  @MethodSource("provideLocalDPDataset")
  void ldpInit_shouldBeSuccessful(LocalDay day, Instant start, Instant end) {
    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);
    assertThat(plan).isNotNull();
  }

  @ParameterizedTest
  @MethodSource("provideLocalDPDataset")
  void ldpGetters_shouldReturnSetValues(LocalDay day, Instant start, Instant end) {
    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);

    assertThat(plan.day()).isEqualTo(day);
    assertThat(plan.startOfDay()).isEqualTo(start);
    assertThat(plan.endOfDay()).isEqualTo(end);
  }

  @ParameterizedTest
  @MethodSource("provideLocalDPDataset")
  void ldpToString_shouldReturnStringContainingLocalDateAndTimeZone(LocalDay day, Instant start, Instant end) {
    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);

    assertThat(plan.toString()).contains(day.zone().toString(), day.date().toString());
  }

  @Test
  void ldpFindMatchingFreeSlotsOnEmptyDay() {
    LocalDayPlan plan = TestData.emptyWorkingDay();

    List<TimeSlot> freeSlots = plan.findGapsFitting(Duration.ofHours(2));

    assertThat(freeSlots.size()).isEqualTo(1);
  }
}