import { describe, expect, test } from "bun:test";
import {
  getElementSnapDelta,
  getSnapLines,
  getValuesOnAxis,
} from "../snapUtils";

describe("getElementSnapDelta", () => {
  test("Right of moving to left of stationary", () => {
    const movingRect = { x: 105, y: 110, width: 100, height: 100 };
    const stationaryRect = { x: 209, y: 100, width: 100, height: 100 };

    expect(
      getElementSnapDelta({
        movingValues: getValuesOnAxis(movingRect, "x"),
        stationaryValues: getValuesOnAxis(stationaryRect, "x"),
        proximity: 5,
      })
    ).toEqual(4);
  });

  test("Left of moving to left of stationary", () => {
    const movingRect = { x: 109, y: 100, width: 100, height: 100 };
    const stationaryRect = { x: 105, y: 110, width: 100, height: 100 };

    expect(
      getElementSnapDelta({
        movingValues: getValuesOnAxis(movingRect, "x"),
        stationaryValues: getValuesOnAxis(stationaryRect, "x"),
        proximity: 5,
      })
    ).toEqual(-4);
  });

  test("Left of moving to right of stationary", () => {
    const movingRect = { x: 209, y: 100, width: 100, height: 100 };
    const stationaryRect = { x: 105, y: 110, width: 100, height: 100 };

    expect(
      getElementSnapDelta({
        movingValues: getValuesOnAxis(movingRect, "x"),
        stationaryValues: getValuesOnAxis(stationaryRect, "x"),
        proximity: 5,
      })
    ).toEqual(-4);
  });

  test("Right of moving to right of stationary", () => {
    const movingRect = { x: 100, y: 110, width: 50, height: 100 };
    const stationaryRect = { x: 54, y: 100, width: 100, height: 100 };

    expect(
      getElementSnapDelta({
        movingValues: getValuesOnAxis(movingRect, "x"),
        stationaryValues: getValuesOnAxis(stationaryRect, "x"),
        proximity: 5,
      })
    ).toEqual(4);
  });
});

describe("getSnapLines", () => {
  test("Snap line should cover all shapes when moving shape snaps to multiple shapes on X axis", () => {
    const movingRect = { x: 204, y: 900, width: 100, height: 100 };
    const stationaryRects = [
      { x: 204, y: 100, width: 100, height: 100 },
      { x: 4, y: 300, width: 200, height: 100 },
    ];

    const snapLines = getSnapLines({
      movingRect,
      stationaryRects,
      axis: "x",
    });

    expect(snapLines).toEqual([
      { x1: 204, x2: 204, y1: 100, y2: 1000 },
      { x1: 254, x2: 254, y1: 100, y2: 1000 },
      { x1: 304, x2: 304, y1: 100, y2: 1000 },
    ]);
  });
});