import { describe, it, expect } from "vitest";
import {
  BINARY_FILE_EXTENSIONS,
  getFileExtension,
  getFileTypeIcon,
  isBinaryFilePath,
  linkifyFilePaths,
} from "./filePaths";

describe("getFileExtension", () => {
  it("returns the lowercase extension of a simple path", () => {
    expect(getFileExtension("/tmp/report.pdf")).toBe("pdf");
  });

  it("returns the lowercase extension for uppercase file names", () => {
    expect(getFileExtension("/tmp/AUDIO.MP3")).toBe("mp3");
  });

  it("returns the extension for a path with multiple dots", () => {
    expect(getFileExtension("/tmp/my.file.docx")).toBe("docx");
  });

  it("returns an empty string when there is no extension", () => {
    expect(getFileExtension("/tmp/noextension")).toBe("");
  });

  it("returns an empty string for an empty string input", () => {
    expect(getFileExtension("")).toBe("");
  });

  it("returns the extension for a home-relative path", () => {
    expect(getFileExtension("~/downloads/track.wav")).toBe("wav");
  });
});

describe("getFileTypeIcon", () => {
  it("returns the PDF icon for .pdf files", () => {
    expect(getFileTypeIcon("/tmp/doc.pdf")).toBe("📄");
  });

  it("returns the Word icon for .docx files", () => {
    expect(getFileTypeIcon("/tmp/report.docx")).toBe("📝");
  });

  it("returns the Word icon for .doc files", () => {
    expect(getFileTypeIcon("/tmp/old.doc")).toBe("📝");
  });

  it("returns the spreadsheet icon for .xlsx files", () => {
    expect(getFileTypeIcon("/tmp/data.xlsx")).toBe("📊");
  });

  it("returns the spreadsheet icon for .xls files", () => {
    expect(getFileTypeIcon("/tmp/data.xls")).toBe("📊");
  });

  it("returns the presentation icon for .pptx files", () => {
    expect(getFileTypeIcon("/tmp/slides.pptx")).toBe("📽️");
  });

  it("returns the presentation icon for .ppt files", () => {
    expect(getFileTypeIcon("/tmp/slides.ppt")).toBe("📽️");
  });

  it("returns the audio icon for .mp3 files", () => {
    expect(getFileTypeIcon("/tmp/song.mp3")).toBe("🎵");
  });

  it("returns the audio icon for .wav files", () => {
    expect(getFileTypeIcon("/tmp/sound.wav")).toBe("🎵");
  });

  it("returns the audio icon for .ogg files", () => {
    expect(getFileTypeIcon("/tmp/audio.ogg")).toBe("🎵");
  });

  it("returns the audio icon for .flac files", () => {
    expect(getFileTypeIcon("/tmp/lossless.flac")).toBe("🎵");
  });

  it("returns the audio icon for .aac files", () => {
    expect(getFileTypeIcon("/tmp/compressed.aac")).toBe("🎵");
  });

  it("returns the audio icon for .m4a files", () => {
    expect(getFileTypeIcon("/tmp/itunes.m4a")).toBe("🎵");
  });

  it("returns the video icon for .mp4 files", () => {
    expect(getFileTypeIcon("/tmp/video.mp4")).toBe("🎬");
  });

  it("returns the video icon for .avi files", () => {
    expect(getFileTypeIcon("/tmp/old.avi")).toBe("🎬");
  });

  it("returns the video icon for .mov files", () => {
    expect(getFileTypeIcon("/tmp/clip.mov")).toBe("🎬");
  });

  it("returns the video icon for .mkv files", () => {
    expect(getFileTypeIcon("/tmp/film.mkv")).toBe("🎬");
  });

  it("returns the video icon for .webm files", () => {
    expect(getFileTypeIcon("/tmp/stream.webm")).toBe("🎬");
  });

  it("returns the archive icon for .zip files", () => {
    expect(getFileTypeIcon("/tmp/bundle.zip")).toBe("📦");
  });

  it("returns the archive icon for .tar files", () => {
    expect(getFileTypeIcon("/tmp/archive.tar")).toBe("📦");
  });

  it("returns the archive icon for .gz files", () => {
    expect(getFileTypeIcon("/tmp/compressed.gz")).toBe("📦");
  });

  it("returns the disk icon for .bin files", () => {
    expect(getFileTypeIcon("/tmp/firmware.bin")).toBe("💿");
  });

  it("returns the disk icon for .iso files", () => {
    expect(getFileTypeIcon("/tmp/image.iso")).toBe("💿");
  });

  it("returns the generic folder icon for an unknown extension", () => {
    expect(getFileTypeIcon("/tmp/file.unknown")).toBe("📁");
  });

  it("returns the generic folder icon for a file with no extension", () => {
    expect(getFileTypeIcon("/tmp/noext")).toBe("📁");
  });
});

describe("isBinaryFilePath", () => {
  it("returns true for a PDF path", () => {
    expect(isBinaryFilePath("/tmp/report.pdf")).toBe(true);
  });

  it("returns true for an audio path", () => {
    expect(isBinaryFilePath("/tmp/song.mp3")).toBe(true);
  });

  it("returns true for a video path", () => {
    expect(isBinaryFilePath("/tmp/clip.mp4")).toBe(true);
  });

  it("returns true for a document path", () => {
    expect(isBinaryFilePath("/tmp/doc.docx")).toBe(true);
  });

  it("returns false for a TypeScript file", () => {
    expect(isBinaryFilePath("/src/index.ts")).toBe(false);
  });

  it("returns false for a text file", () => {
    expect(isBinaryFilePath("/tmp/output.txt")).toBe(false);
  });

  it("returns false for a path with no extension", () => {
    expect(isBinaryFilePath("/tmp/file")).toBe(false);
  });
});

describe("BINARY_FILE_EXTENSIONS", () => {
  it("includes pdf", () => {
    expect(BINARY_FILE_EXTENSIONS).toContain("pdf");
  });

  it("includes common audio extensions", () => {
    expect(BINARY_FILE_EXTENSIONS).toContain("mp3");
    expect(BINARY_FILE_EXTENSIONS).toContain("wav");
  });

  it("includes common video extensions", () => {
    expect(BINARY_FILE_EXTENSIONS).toContain("mp4");
  });

  it("includes common document extensions", () => {
    expect(BINARY_FILE_EXTENSIONS).toContain("docx");
    expect(BINARY_FILE_EXTENSIONS).toContain("xlsx");
  });
});

describe("linkifyFilePaths", () => {
  it("converts a PDF path in plain text to a file link", () => {
    const html = "<p>Saved to /tmp/report.pdf successfully.</p>";
    const result = linkifyFilePaths(html);
    expect(result).toContain('data-filepath="/tmp/report.pdf"');
    expect(result).toContain("📄");
    expect(result).toContain('class="file-link"');
  });

  it("converts an audio path to a file link", () => {
    const html = "<p>Audio saved to /tmp/output.mp3</p>";
    const result = linkifyFilePaths(html);
    expect(result).toContain('data-filepath="/tmp/output.mp3"');
    expect(result).toContain("🎵");
  });

  it("does not linkify paths inside code blocks", () => {
    const html = "<p>Example:</p><pre><code>/tmp/file.pdf</code></pre>";
    const result = linkifyFilePaths(html);
    expect(result).not.toContain('data-filepath="/tmp/file.pdf"');
    expect(result).toContain("/tmp/file.pdf");
  });

  it("does not linkify paths inside inline code", () => {
    const html = "<p>Use <code>/tmp/file.pdf</code> to open it.</p>";
    const result = linkifyFilePaths(html);
    expect(result).not.toContain('data-filepath="/tmp/file.pdf"');
    expect(result).toContain("/tmp/file.pdf");
  });

  it("does not modify HTML that has no binary file paths", () => {
    const html = "<p>Hello, this is regular text with /tmp/script.sh</p>";
    const result = linkifyFilePaths(html);
    expect(result).toBe(html);
  });

  it("does not linkify text file paths", () => {
    const html = "<p>Saved to /tmp/output.txt</p>";
    const result = linkifyFilePaths(html);
    expect(result).not.toContain("data-filepath");
  });

  it("handles a home-relative path", () => {
    const html = "<p>Saved to ~/downloads/audio.flac</p>";
    const result = linkifyFilePaths(html);
    expect(result).toContain('data-filepath="~/downloads/audio.flac"');
    expect(result).toContain("🎵");
  });

  it("handles multiple file paths in the same HTML", () => {
    const html = "<p>Files: /tmp/a.pdf and /tmp/b.mp3</p>";
    const result = linkifyFilePaths(html);
    expect(result).toContain('data-filepath="/tmp/a.pdf"');
    expect(result).toContain('data-filepath="/tmp/b.mp3"');
  });

  it("does not linkify paths that contain double quotes (invalid path character)", () => {
    // Double quotes are excluded from path chars so the path is not matched
    const html = `<p>Saved to /tmp/my"file.pdf</p>`;
    const result = linkifyFilePaths(html);
    expect(result).not.toContain("data-filepath");
  });

  it("preserves existing HTML tags and attributes", () => {
    const html = '<p class="foo">Saved to /tmp/report.pdf</p>';
    const result = linkifyFilePaths(html);
    expect(result).toContain('class="foo"');
    expect(result).toContain('data-filepath="/tmp/report.pdf"');
  });

  it("does not double-linkify a path already inside an anchor tag", () => {
    const html = '<a href="/tmp/file.pdf">/tmp/file.pdf</a>';
    const result = linkifyFilePaths(html);
    // The href is inside a tag (placeholder), the text content IS linkified
    // but the href itself should not be modified
    const hrefMatches = result.match(/href="[^"]*\/tmp\/file\.pdf[^"]*"/g) ?? [];
    expect(hrefMatches.length).toBe(1);
  });

  it("returns the input unchanged when html is empty", () => {
    expect(linkifyFilePaths("")).toBe("");
  });
});