package market.guess.ui.desktop;

import static org.junit.jupiter.api.Assertions.assertEquals;

import market.guess.ui.desktop.components.graphic.GraphicHelper;
import market.guess.ui.desktop.components.graphic.MarketChartGraphic;
import market.guess.ui.desktop.components.graphic.Motion;
import market.guess.ui.desktop.components.graphic.SparklineGraphic;
import org.junit.jupiter.api.Test;

/**
 * The handoff requires "animations off" to show the frozen final frame, fully legible and never
 * blank. Since every graphic renders as a function of progress, that contract is exactly: at
 * progress 1, every driver lands on its designed end value.
 */
class AnimTest {
  private static final double[] BAR1 = {0, .35, .30, 1, .60, .6, 1, .35};

  @Test
  void keyframesHoldTheirEndValue() {
    assertEquals(.35, GraphicHelper.at(0, BAR1), 1e-9);
    assertEquals(1.0, GraphicHelper.at(.30, BAR1), 1e-9);
    assertEquals(.35, GraphicHelper.at(1, BAR1), 1e-9);
    assertEquals(.675, GraphicHelper.at(.15, BAR1), 1e-9); // interpolates linearly between stops
    assertEquals(.35, Motion.at(0, BAR1), 1e-9);
  }

  @Test
  void ridersEndOnTheLastPointOfTheirPath() {
    assertEquals(
        MarketChartGraphic.YES_CURVE[6],
        MarketChartGraphic.rideCurve(MarketChartGraphic.YES_CURVE, 1)[0],
        1e-6);
    assertEquals(
        MarketChartGraphic.YES_CURVE[7],
        MarketChartGraphic.rideCurve(MarketChartGraphic.YES_CURVE, 1)[1],
        1e-6);

    int last = SparklineGraphic.SPARK.length;
    assertEquals(
        SparklineGraphic.SPARK[last - 2],
        SparklineGraphic.ridePolyline(SparklineGraphic.SPARK, 1)[0],
        1e-6);
    assertEquals(
        SparklineGraphic.SPARK[last - 1],
        SparklineGraphic.ridePolyline(SparklineGraphic.SPARK, 1)[1],
        1e-6);
  }

  @Test
  void ridersStartOnTheFirstPointOfTheirPath() {
    assertEquals(
        MarketChartGraphic.YES_CURVE[0],
        MarketChartGraphic.rideCurve(MarketChartGraphic.YES_CURVE, 0)[0],
        1e-6);
    assertEquals(
        MarketChartGraphic.YES_CURVE[1],
        MarketChartGraphic.rideCurve(MarketChartGraphic.YES_CURVE, 0)[1],
        1e-6);

    assertEquals(
        SparklineGraphic.SPARK[0],
        SparklineGraphic.ridePolyline(SparklineGraphic.SPARK, 0)[0],
        1e-6);
    assertEquals(
        SparklineGraphic.SPARK[1],
        SparklineGraphic.ridePolyline(SparklineGraphic.SPARK, 0)[1],
        1e-6);
  }
}