import { describe, expect, it } from "vitest";

import {
  detectKind,
  fileExtension,
  inventoryIdentity,
} from "../../src/privacy";
import { jpegFixture, pngFixture, webpFixture } from "../fixtures/images";

describe("file identity", () => {
  it("detects supported containers from bytes", () => {
    expect(detectKind(jpegFixture())).toBe("jpeg");
    expect(detectKind(pngFixture())).toBe("png");
    expect(detectKind(webpFixture())).toBe("webp");
    expect(detectKind(Uint8Array.from([0x25, 0x50, 0x44, 0x46, 0x2d]))).toBe(
      "pdf",
    );
  });

  it("normalizes leaf extensions without trusting paths", () => {
    expect(fileExtension("folder\\PHOTO.JPEG")).toBe("jpeg");
    expect(fileExtension(".hidden")).toBe("");
    expect(fileExtension("no-extension")).toBe("");
  });

  it("reports claimed and extension mismatches", () => {
    const identity = inventoryIdentity(
      "portrait.jpg",
      "image/jpeg",
      pngFixture(),
    );
    expect(identity).toMatchObject({
      detectedKind: "png",
      detectedType: "image/png",
      typeMatch: "mismatch",
    });
  });

  it("does not infer an unknown payload from its extension", () => {
    const identity = inventoryIdentity(
      "claim.png",
      "image/png",
      Uint8Array.from([1, 2, 3]),
    );
    expect(identity.detectedKind).toBe("unknown");
    expect(identity.typeMatch).toBe("unknown");
  });
});