#!/usr/bin/env python3
"""Parse docs/FRICTION.md 'Open signals' into structured data for /kaizen.

Stdlib only. Modes:
  --json  (default): emit the open signals as JSON (Phase-0 input for /kaizen)
  --nudge          : print a one-line 'loop overdue?' summary

Authoritative design: docs/superpowers/specs/2026-06-14-kaizen-command-design.md
"""
import argparse
import datetime
import json
import os
import re

REPO_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
FRICTION = os.path.join(REPO_ROOT, "docs", "FRICTION.md")


def extract_open_section(text):
    """Return the body between '## Open signals' and the next '## ' heading."""
    lines = text.splitlines()
    start = None
    for i, line in enumerate(lines):
        if line.strip().lower() == "## open signals":
            start = i + 1
            break
    if start is None:
        return ""
    end = len(lines)
    for j in range(start, len(lines)):
        if lines[j].startswith("## "):
            end = j
            break
    return "\n".join(lines[start:end])


def split_signals(section):
    """Split the Open-signals body into raw per-signal blocks.

    A signal starts with a top-level '- ' bullet; indented or blank lines are
    continuations. Returns a list of multi-line strings with the leading '- '
    stripped from the first line."""
    signals = []
    current = None
    for line in section.splitlines():
        if line.startswith("- "):
            if current is not None:
                signals.append("\n".join(current).strip())
            current = [line[2:]]
        elif current is not None:
            if line.strip() == "" or line.startswith("  "):
                current.append(line.strip())
            else:
                signals.append("\n".join(current).strip())
                current = None
    if current is not None:
        signals.append("\n".join(current).strip())
    return [s for s in signals if s]


if __name__ == "__main__":  # pragma: no cover (filled in Task 4)
    pass