"""
End-to-end verification: run the smart-fit PDF translator on the
real test PDF and verify the output preserves the font hierarchy.
"""
import fitz
import shutil
import tempfile
from pathlib import Path

# Create a temp copy of the test PDF
src = Path("sample_files/test_corpus/test_pdf.pdf")
with tempfile.TemporaryDirectory() as tmp:
    work = Path(tmp) / "test.pdf"
    shutil.copy(src, work)
    out = Path(tmp) / "out.pdf"

    # Run the translator
    from translators.pdf_translator import PDFTranslator
    translator = PDFTranslator()
    translator.translate_file(
        work, out,
        target_language="fr",
        source_language="en",
    )

    # Compare fonts
    orig = fitz.open(src)
    new = fitz.open(out)

    print(f"Original:   {len(orig)} pages, {src.stat().st_size} bytes")
    print(f"Translated: {len(new)} pages, {out.stat().st_size} bytes")
    print()

    print(f"{'Page':<6}{'Original fonts':<40}{'Translated fonts':<40}")
    print("=" * 90)
    for i in range(min(len(orig), len(new))):
        o = orig[i]
        t = new[i]

        o_fonts = set()
        t_fonts = set()
        for block in o.get_text("dict").get("blocks", []):
            for line in block.get("lines", []):
                for span in line.get("spans", []):
                    o_fonts.add(round(span.get("size", 0), 1))
        for block in t.get_text("dict").get("blocks", []):
            for line in block.get("lines", []):
                for span in line.get("spans", []):
                    t_fonts.add(round(span.get("size", 0), 1))

        # Filter out the 6.0pt placeholder
        t_fonts_real = {s for s in t_fonts if s > 6.5}

        print(f"{i+1:<6}{sorted(o_fonts)!s:<40}{sorted(t_fonts_real)!s:<40}")

    orig.close()
    new.close()

# Save the translated output for the user to inspect
shutil.copy(out, "sample_files/test_corpus/test_pdf_translated_v2.pdf")
print()
print("Translated output saved to: sample_files/test_corpus/test_pdf_translated_v2.pdf")