"""Debug the smart-fit behavior on a real PDF."""
import sys
sys.path.insert(0, '.')
import importlib.util

spec = importlib.util.spec_from_file_location("pdf_mod", "translators/pdf_translator.py")
pdf_mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(pdf_mod)

import fitz

# Open the test PDF
doc = fitz.open("sample_files/test_corpus/test_pdf.pdf")
page = doc[0]

# Extract blocks
translator = pdf_mod.PDFTranslator()
raw_blocks = translator._extract_text_blocks(page)
merged = translator._merge_adjacent_blocks(raw_blocks, page.rect)

# Show block info
for i, block in enumerate(merged[:5]):
    print(f"Block {i}:")
    print(f"  bbox: {block['bbox']}")
    print(f"  font_size: {block['font_size']}")
    print(f"  text: {block['text'][:50]!r}")
    print()

# Manually try the smart-fit on the title block
title = merged[0]
print("=" * 60)
print("Smart-fit trace on title block:")
print("=" * 60)
import fitz
original_rect = fitz.Rect(title["bbox"])
page_rect = page.rect
print(f"  original_rect: {original_rect}")
print(f"  page_rect: {page_rect}")
print(f"  page width: {page_rect.x1 - page_rect.x0}")
print(f"  original width: {original_rect.width}, height: {original_rect.height}")

# Simulate the expansion
margin = 18
max_x1 = page_rect.x1 - margin
expanded_h = fitz.Rect(
    max(original_rect.x0, page_rect.x0 + margin),
    original_rect.y0,
    max_x1,
    original_rect.y1,
)
print(f"  expanded_h: {expanded_h}, width: {expanded_h.width}")

next_block_y = page_rect.y1 - margin
max_expand_y = min(
    next_block_y - original_rect.y1,
    original_rect.height * pdf_mod.MAX_VERTICAL_EXPANSION,
)
expanded_v = fitz.Rect(
    expanded_h.x0,
    expanded_h.y0,
    expanded_h.x1,
    expanded_h.y1 + max_expand_y,
)
print(f"  expanded_v: {expanded_v}, width: {expanded_v.width}, height: {expanded_v.height}")

# Try the actual insert
from fitz import TEXT_ALIGN_LEFT
french_text = "Spécification technique : Office Translator v3.0"
rc = page.insert_textbox(
    expanded_v,
    french_text,
    fontsize=title["font_size"],
    fontname="helv",
    color=(0.1, 0.2, 0.5),
    align=TEXT_ALIGN_LEFT,
    overlay=True,
)
print(f"  insert_textbox rc (with expanded_v at original size): {rc}")
print(f"  >= 0 = fit, < 0 = overflow of {rc} points")

doc.close()