import { describe, expect, it } from "vitest";
import { getGroupPosition, stackEdgeRadius, stackRadiusProps } from "./groupGeometry";

describe("getGroupPosition", () => {
  it("returns only for singleton or empty groups", () => {
    expect(getGroupPosition(0, 1)).toBe("only");
    expect(getGroupPosition(0, 0)).toBe("only");
  });

  it("maps first/middle/last by index", () => {
    expect(getGroupPosition(0, 3)).toBe("first");
    expect(getGroupPosition(1, 3)).toBe("middle");
    expect(getGroupPosition(2, 3)).toBe("last");
  });

  it("a two-item group has no middle", () => {
    expect(getGroupPosition(0, 2)).toBe("first");
    expect(getGroupPosition(1, 2)).toBe("last");
  });
});

describe("stackRadiusProps (vertical)", () => {
  const r = "$4";

  it("first rounds only the top corners", () => {
    expect(stackRadiusProps("first", r)).toEqual({
      borderStartStartRadius: r,
      borderStartEndRadius: r,
      borderEndStartRadius: 0,
      borderEndEndRadius: 0,
    });
  });

  it("last rounds only the bottom corners", () => {
    expect(stackRadiusProps("last", r)).toEqual({
      borderStartStartRadius: 0,
      borderStartEndRadius: 0,
      borderEndStartRadius: r,
      borderEndEndRadius: r,
    });
  });

  it("middle is square on every corner", () => {
    expect(stackRadiusProps("middle", r)).toEqual({
      borderStartStartRadius: 0,
      borderStartEndRadius: 0,
      borderEndStartRadius: 0,
      borderEndEndRadius: 0,
    });
  });

  it("only rounds all four corners", () => {
    expect(stackRadiusProps("only", r)).toEqual({
      borderStartStartRadius: r,
      borderStartEndRadius: r,
      borderEndStartRadius: r,
      borderEndEndRadius: r,
    });
  });
});

describe("stackRadiusProps (horizontal)", () => {
  const r = "$4";

  it("first rounds only the inline-start corners", () => {
    expect(stackRadiusProps("first", r, "horizontal")).toEqual({
      borderStartStartRadius: r,
      borderEndStartRadius: r,
      borderStartEndRadius: 0,
      borderEndEndRadius: 0,
    });
  });

  it("last rounds only the inline-end corners", () => {
    expect(stackRadiusProps("last", r, "horizontal")).toEqual({
      borderStartStartRadius: 0,
      borderEndStartRadius: 0,
      borderStartEndRadius: r,
      borderEndEndRadius: r,
    });
  });
});

describe("stackEdgeRadius", () => {
  it("supports conditional edges (open accordion trigger: last item, bottom square)", () => {
    expect(stackEdgeRadius("$4", { start: false, end: false })).toEqual({
      borderStartStartRadius: 0,
      borderStartEndRadius: 0,
      borderEndStartRadius: 0,
      borderEndEndRadius: 0,
    });
    expect(stackEdgeRadius("$4", { start: true })).toEqual({
      borderStartStartRadius: "$4",
      borderStartEndRadius: "$4",
      borderEndStartRadius: 0,
      borderEndEndRadius: 0,
    });
  });

  it("treats undefined radius as 0 (radius:none world stays square)", () => {
    expect(stackEdgeRadius(undefined, { start: true, end: true })).toEqual({
      borderStartStartRadius: 0,
      borderStartEndRadius: 0,
      borderEndStartRadius: 0,
      borderEndEndRadius: 0,
    });
  });
});