import { describe, it, expect } from "vitest";
import { buildPdfOptions, PdfRenderOptions } from "../services/browser.js";

describe("buildPdfOptions", () => {
  it("returns sensible defaults when no options given", () => {
    const result = buildPdfOptions({});
    expect(result).toEqual({
      format: "A4",
      landscape: false,
      printBackground: true,
      margin: { top: "0", right: "0", bottom: "0", left: "0" },
    });
  });

  it("passes through all provided options", () => {
    const opts: PdfRenderOptions = {
      format: "Letter",
      landscape: true,
      printBackground: false,
      margin: { top: "10mm", bottom: "10mm" },
      scale: 1.5,
      pageRanges: "1-3",
      preferCSSPageSize: true,
      width: "210mm",
      height: "297mm",
      headerTemplate: "<span>Header</span>",
      footerTemplate: "<span>Footer</span>",
      displayHeaderFooter: true,
    };
    const result = buildPdfOptions(opts);
    expect(result.format).toBe("Letter");
    expect(result.landscape).toBe(true);
    expect(result.printBackground).toBe(false);
    expect(result.margin).toEqual({ top: "10mm", bottom: "10mm" });
    expect(result.scale).toBe(1.5);
    expect(result.pageRanges).toBe("1-3");
    expect(result.preferCSSPageSize).toBe(true);
    expect(result.width).toBe("210mm");
    expect(result.height).toBe("297mm");
    expect(result.headerTemplate).toBe("<span>Header</span>");
    expect(result.footerTemplate).toBe("<span>Footer</span>");
    expect(result.displayHeaderFooter).toBe(true);
  });

  it("omits undefined optional fields from output", () => {
    const result = buildPdfOptions({ format: "A4" });
    expect(result).not.toHaveProperty("scale");
    expect(result).not.toHaveProperty("pageRanges");
    expect(result).not.toHaveProperty("preferCSSPageSize");
    expect(result).not.toHaveProperty("width");
    expect(result).not.toHaveProperty("height");
    expect(result).not.toHaveProperty("headerTemplate");
    expect(result).not.toHaveProperty("footerTemplate");
  });

  it("handles printBackground false explicitly", () => {
    const result = buildPdfOptions({ printBackground: false });
    expect(result.printBackground).toBe(false);
  });

  it("defaults displayHeaderFooter to false only when explicitly set", () => {
    const r1 = buildPdfOptions({});
    expect(r1).not.toHaveProperty("displayHeaderFooter");

    const r2 = buildPdfOptions({ displayHeaderFooter: false });
    expect(r2.displayHeaderFooter).toBe(false);
  });
});