import { describe, expect, it } from "vitest";
import {
  SAMPLE_FILE_EXTENSIONS,
  fileKindFromUrl,
  imageContentTypeFromUrl,
  imageFormatFromUrl,
} from "@/utils/file-kind";

describe("fileKindFromUrl", () => {
  it("pdf → pdf, รูปทุกนามสกุล → image (case-insensitive)", () => {
    expect(fileKindFromUrl("/samples/a.pdf")).toBe("pdf");
    expect(fileKindFromUrl("/samples/photo.JPG")).toBe("image");
    expect(fileKindFromUrl("/uploads/scan.Jpeg")).toBe("image");
    expect(fileKindFromUrl("/uploads/scan.png")).toBe("image");
    expect(fileKindFromUrl("/uploads/scan.TIF")).toBe("image");
    expect(fileKindFromUrl("/uploads/scan.tiff")).toBe("image");
  });

  it("ไม่รู้จัก extension = pdf ตามพฤติกรรมก่อน N3", () => {
    expect(fileKindFromUrl("/samples/file.docx")).toBe("pdf");
    expect(fileKindFromUrl("/samples/noext")).toBe("pdf");
    expect(fileKindFromUrl("/samples/.jpg")).toBe("pdf"); // dotfile ไม่ใช่ extension
  });
});

describe("imageFormatFromUrl", () => {
  it("จับคู่นามสกุล → format (รวม query string / จุดซ้ำในชื่อ)", () => {
    expect(imageFormatFromUrl("/a/b/x.jpg?v=2")).toBe("jpeg");
    expect(imageFormatFromUrl("/a/b/x.jpeg")).toBe("jpeg");
    expect(imageFormatFromUrl("/a/b/scan.v2.png")).toBe("png");
    expect(imageFormatFromUrl("/a/b/x.tif")).toBe("tiff");
    expect(imageFormatFromUrl("/a/b/x.tiff")).toBe("tiff");
  });

  it("ไม่ใช่รูป → null (รวมชื่อที่คล้ายนามสกุลแต่เป็นโฟลเดอร์)", () => {
    expect(imageFormatFromUrl("/a/b/x.pdf")).toBeNull();
    expect(imageFormatFromUrl("/jpg.png/jpg")).toBeNull();
    expect(imageFormatFromUrl("")).toBeNull();
  });
});

describe("imageContentTypeFromUrl", () => {
  it("map format → MIME ที่ถูกต้อง", () => {
    expect(imageContentTypeFromUrl("/a/x.jpg")).toBe("image/jpeg");
    expect(imageContentTypeFromUrl("/a/x.PNG")).toBe("image/png");
    expect(imageContentTypeFromUrl("/a/x.tiff")).toBe("image/tiff");
    expect(imageContentTypeFromUrl("/a/x.pdf")).toBe("application/octet-stream");
  });
});

describe("SAMPLE_FILE_EXTENSIONS", () => {
  it("ครบทุกนามสกุลที่ requirement 5.3.4 ระบุ", () => {
    for (const ext of [".pdf", ".jpg", ".jpeg", ".png", ".tif", ".tiff"]) {
      expect(SAMPLE_FILE_EXTENSIONS).toContain(ext);
    }
  });
});