"""
Utility functions for generating Word documents (DOCX) from course outlines.

This module provides a helper to convert a course outline into a .docx file.
It uses the python-docx library to construct a simple document with a title,
outline sections, optional bullet points, and a references section. The
generated file is saved to a temporary location and the path is returned.

Dependencies:
    python-docx >= 1.1.0

"""

from datetime import datetime
from typing import List, Dict, Optional

from docx import Document
from docx.shared import Pt


def outline_to_docx(
    title: str,
    outline_text: str,
    references: Optional[List[Dict[str, str]]] = None,
    path: str = "/tmp/course_outline.docx",
) -> str:
    """Create a Word document from a course outline.

    Args:
        title: Title for the course or outline.
        outline_text: Plain text of the outline. Each line will be written as a
            separate paragraph. If you need more structured output, consider
            extending this function to parse the text.
        references: Optional list of dictionaries with 'title' and 'url' keys.
            These will be included in a references section at the end.
        path: File system path where the document will be written. Defaults
            to '/tmp/course_outline.docx'.

    Returns:
        The file path to the generated document.
    """
    # Create a new document
    doc = Document()

    # Title heading
    title_heading = doc.add_heading(level=1)
    run = title_heading.add_run(title or "Course Outline")
    run.bold = True
    run.font.size = Pt(20)

    # Write each line of the outline as a paragraph
    for line in (outline_text or "").splitlines():
        line = line.strip()
        if not line:
            continue
        # Use list bullet style if the line looks like a bullet (starts with '-' or '*')
        if line.lstrip().startswith(("-", "*")):
            # Remove leading bullet characters
            content = line.lstrip("-* ")
            p = doc.add_paragraph(content, style="List Bullet")
        else:
            p = doc.add_paragraph(line)
        # Standard font size
        for r in p.runs:
            r.font.size = Pt(12)

    # References
    if references:
        doc.add_heading("References", level=2)
        for ref in references:
            ref_title = ref.get("title", "")
            ref_url = ref.get("url", "")
            para = doc.add_paragraph()
            if ref_title:
                para.add_run(ref_title).bold = True
                para.add_run(" — ")
            para.add_run(ref_url)
            for r in para.runs:
                r.font.size = Pt(11)

    # Timestamp
    doc.add_paragraph()
    timestamp = datetime.now().strftime("Generated %Y-%m-%d %H:%M:%S")
    footer = doc.add_paragraph(timestamp)
    for r in footer.runs:
        r.font.size = Pt(8)

    # Save document
    doc.save(path)
    return path