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

import pytest
from docx import Document
from docx.oxml import OxmlElement
from docx.oxml.ns import qn
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"
ATRA_MANUAL = Path(r"q:\RIP_Help_Source\atra-manual.docx")


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 _add_hyperlink_paragraph(doc: Document, text: str, anchor: str = "toc1"):
    """TOC-style параграф: текстът е само в w:hyperlink/w:r (para.runs == [])."""
    p = doc.add_paragraph()
    for child in list(p._element):
        if child.tag == qn("w:r"):
            p._element.remove(child)
    hl = OxmlElement("w:hyperlink")
    hl.set(qn("w:anchor"), anchor)
    r = OxmlElement("w:r")
    t = OxmlElement("w:t")
    t.set(qn("xml:space"), "preserve")
    t.text = text
    r.append(t)
    hl.append(r)
    p._element.append(hl)
    assert len(p.runs) == 0
    assert text in (p.text or "")
    return p


def _add_external_blip_paragraph(doc: Document, image_path: Path):
    """Параграф с a:blip/@r:link към външен файл (като atra-manual.docx)."""
    from docx.opc.constants import RELATIONSHIP_TYPE as RT

    rel = doc.part.rels.get_or_add_ext_rel(RT.IMAGE, image_path.resolve().as_uri())
    rId = rel if isinstance(rel, str) else rel.rId

    p = doc.add_paragraph()
    r = OxmlElement("w:r")
    drawing = OxmlElement("w:drawing")
    inline = OxmlElement("wp:inline")
    inline.set("distT", "0")
    inline.set("distB", "0")
    inline.set("distL", "0")
    inline.set("distR", "0")
    extent = OxmlElement("wp:extent")
    extent.set("cx", "914400")
    extent.set("cy", "914400")
    inline.append(extent)
    docPr = OxmlElement("wp:docPr")
    docPr.set("id", "1")
    docPr.set("name", "Picture")
    inline.append(docPr)
    graphic = OxmlElement("a:graphic")
    graphicData = OxmlElement("a:graphicData")
    graphicData.set(
        "uri", "http://schemas.openxmlformats.org/drawingml/2006/picture"
    )
    pic = OxmlElement("pic:pic")
    nvPicPr = OxmlElement("pic:nvPicPr")
    cNvPr = OxmlElement("pic:cNvPr")
    cNvPr.set("id", "0")
    cNvPr.set("name", "pic")
    nvPicPr.append(cNvPr)
    nvPicPr.append(OxmlElement("pic:cNvPicPr"))
    pic.append(nvPicPr)
    blipFill = OxmlElement("pic:blipFill")
    blip = OxmlElement("a:blip")
    blip.set(qn("r:link"), rId)
    blipFill.append(blip)
    blipFill.append(OxmlElement("a:stretch"))
    pic.append(blipFill)
    spPr = OxmlElement("pic:spPr")
    pic.append(spPr)
    graphicData.append(pic)
    graphic.append(graphicData)
    inline.append(graphic)
    drawing.append(inline)
    r.append(drawing)
    p._element.append(r)
    return p


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_docx_hyperlink_toc_and_style_bold_in_html(tmp_path: Path):
    """TOC в w:hyperlink + Heading bold без run.bold → html_text ги пази."""
    doc = Document()
    doc.add_heading("NESPERTCAM Launcher - тест", level=1)
    doc.add_heading("Съдържание", level=3)
    _add_hyperlink_paragraph(doc, "1. Преглед на приложението")
    _add_hyperlink_paragraph(doc, "2. Инсталация и настройка")
    doc.add_heading("1. Преглед на приложението", level=2)
    h3 = doc.add_heading("Какво е NESPERTCAM?", level=3)
    # Heading style → run.bold is None, style.font.bold True
    assert h3.runs and h3.runs[0].bold is not True
    p = doc.add_paragraph()
    p.add_run("Тяло с достатъчно думи за секцията на ръководството.")

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

    sections = merge_preamble_sections(merge_short_sections(parse_docx(out)))
    assert sections
    preamble = sections[0]
    assert "Съдържание" in (preamble.text or "")
    assert "1. Преглед" in (preamble.text or "")
    html = preamble.html_text or ""
    assert "Съдържание" in html
    assert "1. Преглед" in html
    assert "2. Инсталация" in html

    overview = next(s for s in sections if s.title.startswith("1. Преглед"))
    assert "<b>" in (overview.html_text or "")
    assert "Какво е NESPERTCAM?" in (overview.html_text or "")


def test_docx_external_r_link_image(tmp_path: Path):
    png = _mini_png()
    img_path = tmp_path / "ext.png"
    img_path.write_bytes(png)
    try:
        from io import BytesIO
        from PIL import Image

        assert Image.open(BytesIO(png)).size[0] >= 50
    except Exception:
        pytest.skip("PIL unavailable for size check")

    doc = Document()
    doc.add_heading("1. С картинка", level=1)
    doc.add_paragraph("Преди фигурата.")
    try:
        _add_external_blip_paragraph(doc, img_path)
    except Exception as exc:
        pytest.skip(f"cannot build r:link drawing: {exc}")
    doc.add_paragraph("След фигурата.")

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

    sections = merge_preamble_sections(merge_short_sections(parse_docx(out)))
    body = sections[0]
    assert body.images, "r:link external image must be loaded"
    assert "[IMG:" in (body.text or "")
    assert "[IMG:" in (body.html_text or "")


@pytest.mark.skipif(not ATRA_MANUAL.is_file(), reason="atra-manual.docx not mounted")
def test_atra_manual_toc_bold_and_image_in_html():
    """Регресия върху реалния NESPERTCAM Launcher manual."""
    sections = merge_preamble_sections(merge_short_sections(parse_docx(ATRA_MANUAL)))
    assert len(sections) >= 3
    first = sections[0]
    assert "NESPERTCAM" in first.title
    assert "Съдържание" in (first.text or "")
    assert "1. Преглед" in (first.text or "") or "Инсталация" in (first.text or "")
    html0 = first.html_text or ""
    assert "Съдържание" in html0
    assert "1. Преглед" in html0 or "Инсталация" in html0

    # Style-bold подзаглавия + изричен bold по-нататък
    assert any("<b>" in (s.html_text or "") for s in sections)

    # Фигура 1 е външен UNC линк — ако share-ът е достъпен, трябва [IMG:]
    overview = next((s for s in sections if "Преглед" in s.title), None)
    assert overview is not None
    if overview.images or "[IMG:" in (overview.text or ""):
        assert "[IMG:" in (overview.html_text or "")
    else:
        # Документът сочи към външен файл; ако UNC липсва, plain caption остава
        assert "Фигура 1" in (overview.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")