import { describe, expect, it } from "vitest";
import {
  inspectGraphemeClusters,
  joinEmojiWithZwj,
  setEmojiPresentation,
  setEmojiSkinTone,
} from "../../src/unicode/graphemes";
import {
  codePointFallbackStatus,
  codePointLabel,
  compareNormalization,
  decodeCodePointList,
  inspectText,
  parseCodeChartRange,
  parseCodePointList,
} from "../../src/unicode/model";

describe("Unicode helper integration", () => {
  it("parses and decodes scalar values", () => {
    expect(parseCodePointList("U+0041 1F600")).toEqual([0x41, 0x1f600]);
    expect(decodeCodePointList("41, 1F600")).toBe("A😀");
    expect(() => parseCodePointList("D800")).toThrow(/scalar value/u);
  });

  it("inspects code points separately from graphemes", () => {
    const result = inspectText("e\u0301");
    expect(result.codePointCount).toBe(2);
    expect(result.graphemes).toHaveLength(1);
    expect(result.points[1]?.javascript).toBe("\\u0301");
  });

  it("compares all normalization forms", () => {
    const result = compareNormalization("e\u0301");
    expect(result.forms.find((item) => item.form === "NFC")?.value).toBe("é");
    expect(codePointLabel(0x1f600)).toBe("U+1F600");
  });

  it("classifies non-character code-space regions explicitly", () => {
    expect(codePointFallbackStatus(0x0378)).toBe("unassigned");
    expect(codePointFallbackStatus(0xe000)).toBe("private-use");
    expect(codePointFallbackStatus(0xd800)).toBe("surrogate");
    expect(codePointFallbackStatus(0xfdd0)).toBe("noncharacter");
    expect(codePointFallbackStatus(0x10ffff)).toBe("noncharacter");
  });

  it("accepts bounded hexadecimal chart ranges", () => {
    expect(parseCodeChartRange("U+D7F0", "0xE010")).toEqual({
      start: 0xd7f0,
      end: 0xe010,
    });
    expect(() => parseCodeChartRange("110000", "110001")).toThrow(/U\+10FFFF/u);
    expect(() => parseCodeChartRange("100", "FF")).toThrow(/must not follow/u);
  });

  it("reports emoji structure at grapheme-cluster boundaries", () => {
    const result = inspectGraphemeClusters("👨‍👩‍👧‍👦 🇩🇪 1️⃣");
    expect(result[0]).toMatchObject({
      value: "👨‍👩‍👧‍👦",
      containsZwj: true,
      extendedPictographic: true,
    });
    expect(result.find((item) => item.value === "🇩🇪")?.regionalIndicators).toBe(
      2,
    );
    expect(result.find((item) => item.value === "1️⃣")?.keycap).toBe(true);
  });

  it("edits bounded emoji sequences without claiming RGI validity", () => {
    expect(setEmojiPresentation("☕", "emoji")).toBe("☕️");
    expect(setEmojiSkinTone("👍", 1)).toBe("👍🏻");
    expect(setEmojiSkinTone("☝️", 1)).toBe("☝🏻");
    expect(joinEmojiWithZwj(["👩", "💻"])).toBe("👩‍💻");
    expect(() => setEmojiPresentation("👩‍💻", "text")).toThrow(
      /individual components/u,
    );
    expect(() => setEmojiPresentation("👍🏻", "text")).toThrow(
      /sequence-specific/u,
    );
    expect(() => joinEmojiWithZwj(["👩"])).toThrow(/2–8/u);
  });
});