"""Markdown + YAML frontmatter rendering for processed notes.

Renders:
  - Frontmatter with title, date, tags, people, projects, source
  - Body with wiki-links inserted
  - Action Items section at the end
"""

import logging
from datetime import datetime, timezone
from pathlib import Path

import yaml

from ingestion.enrichment.models import EnrichmentResult

logger = logging.getLogger(__name__)


def render_note(
    enrichment: EnrichmentResult, body_text: str, source_file: Path
) -> str:
    """Render a complete markdown note with YAML frontmatter.

    Args:
        enrichment: The enrichment result with metadata and entities.
        body_text: The document body (with wiki-links already inserted).
        source_file: Original source file path for provenance.

    Returns:
        Complete markdown string with frontmatter, body, and action items.
    """
    # Build frontmatter data
    frontmatter: dict = {
        "title": enrichment.title,
    }

    # Extract date from entities or use today
    date_entities = [e for e in enrichment.entities if e.type == "date"]
    if date_entities:
        frontmatter["date"] = date_entities[0].value
    else:
        frontmatter["date"] = datetime.now(timezone.utc).strftime("%Y-%m-%d")

    if enrichment.tags:
        frontmatter["tags"] = enrichment.tags

    # People and projects from entities
    people = list(
        {e.value for e in enrichment.entities if e.type == "person"}
    )
    projects = list(
        {e.value for e in enrichment.entities if e.type == "project"}
    )

    if people:
        frontmatter["people"] = sorted(people)
    if projects:
        frontmatter["projects"] = sorted(projects)

    frontmatter["source"] = {
        "file": source_file.name,
        "imported": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%S"),
    }

    # Render YAML frontmatter
    yaml_str = yaml.dump(
        frontmatter,
        default_flow_style=False,
        allow_unicode=True,
        sort_keys=False,
    )

    # Build the full document
    parts = [
        "---",
        yaml_str.rstrip(),
        "---",
        "",
        body_text.rstrip(),
    ]

    # Add action items section if any
    if enrichment.action_items:
        parts.append("")
        parts.append("## Action Items")
        parts.append("")
        for item in enrichment.action_items:
            line = f"- [ ] {item.description}"
            if item.assignee:
                line += f" ({item.assignee})"
            if item.deadline:
                line += f" (deadline: {item.deadline})"
            parts.append(line)

    parts.append("")  # trailing newline
    return "\n".join(parts)