import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import { applyLoraValuesToText, debounce, __testables } from "../../../web/comfyui/lora_syntax_utils.js";

const { normalizeStrengthValue, shouldIncludeClipStrength, cleanupLoraSyntax } = __testables();

describe("applyLoraValuesToText", () => {
  it("updates existing LoRA strengths", () => {
    const original = "<lora:StrengthTest:0.50>";
    const result = applyLoraValuesToText(original, [
      { name: "StrengthTest", strength: 0.8 }
    ]);

    expect(result).toBe("<lora:StrengthTest:0.80>");
  });

  it("updates clip strength while preserving syntax", () => {
    const original = "<lora:ClipTest:1.00:0.50>";
    const result = applyLoraValuesToText(original, [
      { name: "ClipTest", strength: 1, clipStrength: 0.75 }
    ]);

    expect(result).toBe("<lora:ClipTest:1.00:0.75>");
  });

  it("appends missing LoRAs to the input text", () => {
    const original = "<lora:Present:0.70>";
    const result = applyLoraValuesToText(original, [
      { name: "Present", strength: 0.7 },
      { name: "Additional", strength: 0.4 }
    ]);

    expect(result).toBe("<lora:Present:0.70> <lora:Additional:0.40>");
  });

  it("keeps clip entry when expanded even if values match", () => {
    const original = "<lora:Expanded:1.00>";
    const result = applyLoraValuesToText(original, [
      { name: "Expanded", strength: 1, clipStrength: 1, expanded: true }
    ]);

    expect(result).toBe("<lora:Expanded:1.00:1.00>");
  });
});

describe("normalizeStrengthValue", () => {
  it("defaults to 1.00 for non-numeric input", () => {
    expect(normalizeStrengthValue("foo")).toBe("1.00");
  });

  it("formats numeric input to two decimals", () => {
    expect(normalizeStrengthValue(0.3333)).toBe("0.33");
  });
});

describe("shouldIncludeClipStrength", () => {
  it("returns true when clip differs", () => {
    expect(
      shouldIncludeClipStrength({ strength: 1, clipStrength: 0.8 }, undefined)
    ).toBe(true);
  });

  it("returns true when expanded despite equal values", () => {
    expect(
      shouldIncludeClipStrength({ strength: 1, clipStrength: 1, expanded: true }, undefined)
    ).toBe(true);
  });

  it("falls back to existing syntax when clip missing", () => {
    expect(shouldIncludeClipStrength({}, "0.7")).toBe(true);
  });
});

describe("cleanupLoraSyntax", () => {
  it("collapses whitespace and stray commas", () => {
    expect(cleanupLoraSyntax("  <lora:A:1.00>  , ," )).toBe("<lora:A:1.00>");
  });
});

describe("debounce", () => {
  beforeEach(() => {
    vi.useFakeTimers();
  });

  afterEach(() => {
    vi.useRealTimers();
  });

  it("delays execution and keeps latest arguments", () => {
    const spy = vi.fn();
    const debounced = debounce(spy, 100);

    debounced("first");
    debounced("second");

    expect(spy).not.toHaveBeenCalled();

    vi.advanceTimersByTime(100);

    expect(spy).toHaveBeenCalledTimes(1);
    expect(spy).toHaveBeenCalledWith("second");
  });

  it("flushes pending calls immediately", () => {
    const spy = vi.fn();
    const debounced = debounce(spy, 200);

    debounced("queued");
    debounced.flush();

    expect(spy).toHaveBeenCalledTimes(1);
    expect(spy).toHaveBeenCalledWith("queued");
  });
});