import { describe, expect, it } from "vitest";
import {
  DEFAULT_OO_AVATAR,
  decodeOoAvatar,
  encodeOoAvatar,
  isValidAvatarValue,
  normalizeOoLook,
  OO_AVATAR_MAX_LENGTH,
  OO_EYE_ASYMMETRY_MIN_RATIO,
  OO_RIG_EYES,
  type OoAvatar,
  ooAvatarColor,
  ooLensRadius,
  ooLookFormat,
} from "./oo-avatar.js";

const styled: OoAvatar = {
  species: "cat",
  color: "#FF781C",
  shape: null,
  arms: "paw",
  lashes: "full",
  liner: "wing",
  eyeshadow: "rose",
  iris: "green",
  sparkle: "heart",
  brows: "fine",
  cheeks: "freckles",
  eyewear: "round",
  head: "chef",
  neck: "bell",
  energy: 1.3,
  playful: 0.8,
};

describe("oo avatar value", () => {
  it("round-trips a fully styled look", () => {
    const value = encodeOoAvatar(styled);
    expect(value).toBe(
      "oo1:c=FF781C;sp=cat;ar=paw;la=full;li=wing;es=rose;ir=green;sk=heart;br=fine;ck=freckles;ew=round;hd=chef;nk=bell;en=1.30;pl=0.80",
    );
    expect(decodeOoAvatar(value)).toEqual(styled);
  });

  it("writes only the colour for the default look", () => {
    expect(encodeOoAvatar({ ...DEFAULT_OO_AVATAR, color: "#a97efe" })).toBe("oo1:c=A97EFE");
    expect(encodeOoAvatar({ ...DEFAULT_OO_AVATAR, shape: 3 })).toBe("oo1:c=8B5CF6;sh=3");
  });

  it("clamps temperament and falls back to the default colour when encoding", () => {
    const value = encodeOoAvatar({ ...DEFAULT_OO_AVATAR, color: "violet", energy: 9, playful: -1 });
    expect(value).toBe("oo1:c=8B5CF6;en=1.60;pl=0.00");
    expect(decodeOoAvatar(value)).toMatchObject({ energy: 1.6, playful: 0 });
  });

  it("reads legacy colour and shape values unchanged", () => {
    expect(decodeOoAvatar("#8b5cf6::shape_3")).toEqual({
      ...DEFAULT_OO_AVATAR,
      color: "#8B5CF6",
      shape: 3,
    });
    expect(decodeOoAvatar("#10B981::shape_11")?.shape).toBe(3);
    expect(decodeOoAvatar("#10B981::shape_x")?.shape).toBe(0);
    expect(decodeOoAvatar("#fff")).toMatchObject({ color: "#FFFFFF", shape: null });
    expect(decodeOoAvatar("violet")).toMatchObject({ color: "violet", shape: null });
  });

  it("treats uploaded pictures as no look", () => {
    expect(decodeOoAvatar("data:image/webp;base64,AAAA")).toBeNull();
    expect(ooAvatarColor("data:image/webp;base64,AAAA")).toBe("");
  });

  it("rejects malformed oo1 values", () => {
    for (const value of [
      "oo1:",
      "oo1:sp=cat",
      "oo1:c=XYZXYZ",
      "oo1:c=FF781C;sp=dragon",
      "oo1:c=FF781C;sh=8",
      "oo1:c=FF781C;en=3",
      "oo1:c=FF781C;pl=1.5",
      "oo1:c=FF781C;broken",
      `oo1:c=FF781C;${"x=1;".repeat(OO_AVATAR_MAX_LENGTH)}`,
    ]) {
      expect(decodeOoAvatar(value), value).toBeNull();
      expect(isValidAvatarValue(value), value).toBe(false);
    }
  });

  it("ignores keys from newer clients", () => {
    expect(decodeOoAvatar("oo1:c=FF781C;sp=dog;zz=new")).toMatchObject({
      species: "dog",
      color: "#FF781C",
    });
  });

  it("accepts every legacy value for persistence", () => {
    expect(isValidAvatarValue("#8B5CF6::shape_0")).toBe(true);
    expect(isValidAvatarValue("data:image/png;base64,AAAA")).toBe(true);
  });

  it("exposes a plain colour for CSS consumers", () => {
    expect(ooAvatarColor("oo1:c=FF781C;sp=cat")).toBe("#FF781C");
    expect(ooAvatarColor("#8B5CF6::shape_2")).toBe("#8B5CF6");
  });

  it("takes a model-written look only as a valid oo1 value", () => {
    expect(normalizeOoLook(" oo1:c=#f4a7b9;sp=cat;ew=round ")).toBe("oo1:c=F4A7B9;sp=cat;ew=round");
    expect(normalizeOoLook("oo1:sp=cat")).toBeNull();
    expect(normalizeOoLook("oo1:c=F4A7B9;sp=dragon")).toBeNull();
    expect(normalizeOoLook("#8B5CF6")).toBeNull();
    expect(normalizeOoLook(42)).toBeNull();
  });

  it("documents the format with the example it gives", () => {
    const example = /e\.g\. (oo1:\S+)\./.exec(ooLookFormat())?.[1];
    expect(example && normalizeOoLook(example)).toBe(example);
    expect(ooLookFormat()).toContain("penguin");
  });
});

describe("oo rig brand lock", () => {
  it("keeps the big eye φ times the small eye", () => {
    const ratio = OO_RIG_EYES.big.r / OO_RIG_EYES.small.r;
    expect(ratio).toBeGreaterThanOrEqual(OO_EYE_ASYMMETRY_MIN_RATIO);
    expect(ratio).toBeCloseTo(1.618, 3);
  });

  it("keeps glasses as asymmetric as the eyes", () => {
    const ratio = ooLensRadius("big") / ooLensRadius("small");
    expect(ratio).toBeGreaterThanOrEqual(OO_EYE_ASYMMETRY_MIN_RATIO);
    expect(ooLensRadius("big")).toBeGreaterThan(OO_RIG_EYES.big.r);
  });
});