"""Intermediate IR blocks between DOCX walk and Markdown emit."""

from __future__ import annotations

from dataclasses import dataclass, field


@dataclass
class InlineSpan:
    text: str
    bold: bool = False
    italic: bool = False
    strike: bool = False
    href: str | None = None  # external URL
    math: str | None = None  # inline latex-ish


@dataclass
class HeadingBlock:
    level: int
    text: str
    numbered: bool = True  # False → # *TITLE


@dataclass
class ParagraphBlock:
    spans: list[InlineSpan] = field(default_factory=list)
    style: str = "Normal"
    is_bibliography: bool = False
    biblio_key: str | None = None


@dataclass
class CaptionBlock:
    kind: str  # figure | table | listing
    number: str
    text: str | None = None
    is_continuation: bool = False
    landscape: bool = False
    unique_id: str = ""


@dataclass
class ImageBlock:
    rel_path: str  # relative to md file
    alt: str = ""
    caption_id: str | None = None
    caption_text: str | None = None


@dataclass
class TableBlock:
    rows: list[list[str]]
    merges: list[list[tuple[str, str]]] | None = None  # (v, h) per cell
    caption_id: str | None = None
    caption_text: str | None = None
    landscape: bool = False


@dataclass
class ListingBlock:
    lines: list[str]
    language: str = ""
    caption_id: str | None = None
    caption_text: str | None = None


@dataclass
class EquationBlock:
    latex: str
    number: str | None = None
    unique_id: str | None = None


@dataclass
class ListBlock:
    ordered: bool
    items: list[str]
    level: int = 1


@dataclass
class TocPlaceholder:
    """Emitted as # *СОДЕРЖАНИЕ + [TOC]."""


@dataclass
class PageBreakBlock:
    pass


@dataclass
class SkipNote:
    """Logged skip; not emitted."""
    message: str


Block = (
    HeadingBlock
    | ParagraphBlock
    | CaptionBlock
    | ImageBlock
    | TableBlock
    | ListingBlock
    | EquationBlock
    | ListBlock
    | TocPlaceholder
    | PageBreakBlock
    | SkipNote
)