"""Convert plain-text press releases to formatted .docx files."""

from __future__ import annotations

import logging
from pathlib import Path

from docx import Document
from docx.shared import Pt

log = logging.getLogger(__name__)

# Standard PR format
_HEADLINE_FONT = "Times New Roman"
_HEADLINE_SIZE = Pt(16)
_BODY_FONT = "Times New Roman"
_BODY_SIZE = Pt(12)


def text_to_docx(text: str, output_path: Path) -> Path:
    """Convert a plain-text press release into a formatted .docx file.

    Layout:
      - First non-blank line → headline (bold, 16pt Times New Roman)
      - Remaining lines → body paragraphs (12pt Times New Roman)
      - Blank lines in the source start new paragraphs.

    Returns the output path.
    """
    doc = Document()

    # Set default font for the document
    style = doc.styles["Normal"]
    style.font.name = _BODY_FONT
    style.font.size = _BODY_SIZE

    lines = text.strip().splitlines()
    if not lines:
        doc.save(str(output_path))
        return output_path

    # First non-blank line is the headline
    headline = lines[0].strip()
    h_para = doc.add_paragraph()
    h_run = h_para.add_run(headline)
    h_run.bold = True
    h_run.font.name = _HEADLINE_FONT
    h_run.font.size = _HEADLINE_SIZE

    # Group remaining lines into paragraphs (split on blank lines)
    body_lines = lines[1:]
    current_para_lines: list[str] = []

    for line in body_lines:
        if line.strip() == "":
            if current_para_lines:
                _add_body_paragraph(doc, " ".join(current_para_lines))
                current_para_lines = []
        else:
            current_para_lines.append(line.strip())

    # Flush any remaining lines
    if current_para_lines:
        _add_body_paragraph(doc, " ".join(current_para_lines))

    output_path.parent.mkdir(parents=True, exist_ok=True)
    doc.save(str(output_path))
    log.info("Saved .docx: %s", output_path)
    return output_path


def _add_body_paragraph(doc: Document, text: str) -> None:
    """Add a body paragraph with standard PR formatting."""
    para = doc.add_paragraph()
    run = para.add_run(text)
    run.font.name = _BODY_FONT
    run.font.size = _BODY_SIZE