import { describe, expect, it } from "vitest";
import communitySize from "../../messages/en/create/community/communitySize.json";
import { SIZE_BANDS } from "../../lib/create/deckTypes";
import { isCommunitySizeStepBlocked } from "../../app/(app)/create/utils/createFlowFooterLabels";

/**
 * Inclusive bounds. 100 stays in 13 to 100. More than 100 starts at 101.
 * The last band has no upper bound.
 */
const BOUNDS: Record<(typeof SIZE_BANDS)[number], { min: number; max: number | null }> = {
  oneMember: { min: 1, max: 1 },
  twoToFive: { min: 2, max: 5 },
  sixToTwelve: { min: 6, max: 12 },
  thirteenToOneHundred: { min: 13, max: 100 },
  oneHundredToOneHundredK: { min: 101, max: null },
};

function bandsForCount(count: number): string[] {
  return SIZE_BANDS.filter((id) => {
    const bound = BOUNDS[id];
    return count >= bound.min && (bound.max == null || count <= bound.max);
  });
}

describe("community size bands", () => {
  it("offers the five engine bands, with exclusive labels", () => {
    expect(communitySize.header.description).toBe(
      "Count the people who have a say in your big decisions. If others take part without a vote, you can say so later in setup.",
    );
    expect(communitySize.communitySizes).toEqual([
      { id: "oneMember", label: "One member" },
      { id: "twoToFive", label: "2 to 5" },
      { id: "sixToTwelve", label: "6 to 12" },
      { id: "thirteenToOneHundred", label: "13 to 100" },
      { id: "oneHundredToOneHundredK", label: "More than 100" },
    ]);
    expect(communitySize.communitySizes.map((row) => row.id)).toEqual([
      ...SIZE_BANDS,
    ]);
  });

  it("puts each count in exactly one band, with 100 in 13 to 100", () => {
    expect(bandsForCount(1)).toEqual(["oneMember"]);
    expect(bandsForCount(5)).toEqual(["twoToFive"]);
    expect(bandsForCount(6)).toEqual(["sixToTwelve"]);
    expect(bandsForCount(12)).toEqual(["sixToTwelve"]);
    expect(bandsForCount(13)).toEqual(["thirteenToOneHundred"]);
    expect(bandsForCount(100)).toEqual(["thirteenToOneHundred"]);
    expect(bandsForCount(101)).toEqual(["oneHundredToOneHundredK"]);
    for (let count = 1; count <= 500; count += 1) {
      expect(bandsForCount(count)).toHaveLength(1);
    }
  });

  it("blocks continue on the size step until one band is chosen", () => {
    expect(isCommunitySizeStepBlocked("community-size", undefined)).toBe(true);
    expect(isCommunitySizeStepBlocked("community-size", [])).toBe(true);
    expect(isCommunitySizeStepBlocked("community-size", [""])).toBe(true);
    expect(
      isCommunitySizeStepBlocked("community-size", ["thirteenToOneHundred"]),
    ).toBe(false);
    expect(
      isCommunitySizeStepBlocked("community-structure", undefined),
    ).toBe(false);
  });
});