import importlib.util
import os

_SPEC = importlib.util.spec_from_file_location(
    "friction_scan",
    os.path.join(os.path.dirname(__file__), "..", "scripts", "friction-scan.py"),
)
fs = importlib.util.module_from_spec(_SPEC)
_SPEC.loader.exec_module(fs)

SAMPLE = """# FRICTION.md

## Open signals

_(append new raw signals here)_

- `[gotcha]` **First thing** (2026-06-01): body line one.
  continuation line two.
- `[friction]` **Second thing** (2026-06-10): only one line.

---

## Kaizen reviews — decisions ledger

- `[gotcha]` **Should not be parsed** (2026-01-01): in the ledger.
"""


def test_extract_open_section_stops_at_next_heading():
    section = fs.extract_open_section(SAMPLE)
    assert "First thing" in section
    assert "Second thing" in section
    assert "Should not be parsed" not in section


def test_split_signals_finds_two_items_and_joins_continuations():
    signals = fs.split_signals(fs.extract_open_section(SAMPLE))
    assert len(signals) == 2
    assert "continuation line two" in signals[0]
    assert signals[1].startswith("`[friction]`")


import datetime

TODAY = datetime.date(2026, 6, 15)


def test_parse_signal_extracts_tag_and_date_and_age():
    raw = fs.split_signals(fs.extract_open_section(SAMPLE))[0]
    sig = fs.parse_signal(raw, TODAY)
    assert sig["tag"] == "gotcha"
    assert sig["first_seen"] == "2026-06-01"
    assert sig["age_days"] == 14
    assert "First thing" in sig["text"]


def test_parse_signal_handles_missing_date():
    sig = fs.parse_signal("`[unused]` **No date here** something", TODAY)
    assert sig["tag"] == "unused"
    assert sig["first_seen"] is None
    assert sig["age_days"] is None