"""Bold / цветове / картинки / спец. символи в html_text (DOCX + HTML)."""
from pathlib import Path

from docx import Document
from docx.shared import RGBColor

from help_processor import (
    clean_text,
    merge_preamble_sections,
    merge_short_sections,
    parse_docx,
    parse_html,
)

FIXTURES = Path(__file__).parent / "fixtures"


def _mini_png(w: int = 64, h: int = 64) -> bytes:
    """Минимален валиден RGB PNG ≥ MIN_IMAGE_PX без PIL зависимост в теста."""
    try:
        from io import BytesIO
        from PIL import Image

        buf = BytesIO()
        Image.new("RGB", (w, h), color=(40, 120, 200)).save(buf, format="PNG")
        return buf.getvalue()
    except Exception:
        # 1×1 PNG — ще се филтрира; тестът за картинка се пропуска частично
        return (
            b"\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01"
            b"\x00\x00\x00\x01\x08\x02\x00\x00\x00\x90wS\xde\x00\x00\x00"
            b"\x0cIDATx\x9cc\xf8\x0f\x00\x00\x01\x01\x00\x05\x18\xd8N"
            b"\x00\x00\x00\x00IEND\xaeB`\x82"
        )


def test_docx_preserves_bold_color_specials_and_images(tmp_path: Path):
    doc = Document()
    doc.add_heading("1. Форматиране", level=1)
    p = doc.add_paragraph()
    r1 = p.add_run("Bold ")
    r1.bold = True
    r2 = p.add_run("и червено")
    r2.font.color.rgb = RGBColor(0xC0, 0x00, 0x00)
    p2 = doc.add_paragraph()
    p2.add_run("Стрелка → и булет • в текста")

    img_path = tmp_path / "pic.png"
    png = _mini_png()
    img_path.write_bytes(png)
    try:
        from io import BytesIO
        from PIL import Image

        assert Image.open(BytesIO(png)).size[0] >= 50
        doc.add_picture(str(img_path))
        expect_img = True
    except Exception:
        expect_img = False

    out = tmp_path / "rich.docx"
    doc.save(out)

    sections = merge_preamble_sections(merge_short_sections(parse_docx(out)))
    assert len(sections) >= 1
    body = next(s for s in sections if "Bold" in (s.text or "") or (s.html_text and "Bold" in s.html_text))
    assert "Bold" in body.text
    assert "→" in body.text
    assert "•" in body.text
    assert "<b>" in (body.html_text or "")
    assert "color:#C00000" in (body.html_text or "")
    # Plain text без HTML тагове — за Claude / keywords
    assert "<b>" not in body.text
    if expect_img:
        assert body.images
        assert "[IMG:" in body.text
        assert "[IMG:" in (body.html_text or "")


def test_html_preserves_bold_and_style_color(tmp_path: Path):
    html = tmp_path / "rich.html"
    html.write_text(
        """<!DOCTYPE html><html><body>
        <h1>1. Цветове</h1>
        <p>Обикновен <b>bold</b> и
        <span style="color:#00aa00; font-size:20px">зелен</span>
        плюс <font color="#0000cc">син</font>.</p>
        </body></html>""",
        encoding="utf-8",
    )
    sections = merge_preamble_sections(merge_short_sections(parse_html(html)))
    assert sections
    sec = sections[0]
    assert "bold" in sec.text
    html_body = sec.html_text or ""
    assert "<b>" in html_body or "<strong>" in html_body
    assert "color:#00aa00" in html_body or "color: #00aa00" in html_body
    assert "font-size" not in html_body  # декоративното се маха
    assert 'color="#0000cc"' in html_body or "color:#0000cc" in html_body


def test_clean_text_strips_nul_keeps_bullets():
    assert "\x00" not in clean_text("a\x00b\tc")
    assert "•" in clean_text("елемент • едно")
    assert "→" in clean_text("A → B")