"""Detect if autoresearch experiments are stuck on the same files."""
import sys
import os

sys.path.insert(0, os.path.dirname(__file__))
from log_append import read_entries


def is_stuck(project: str, entries: list, window: int = 3) -> bool:
    """Return True if the last `window` entries for `project` all touch the same non-empty set of files."""
    project_entries = [e for e in entries if e.get('project') == project]
    if len(project_entries) < window:
        return False
    recent = project_entries[-window:]
    file_sets = [frozenset(e.get('files_changed') or []) for e in recent]
    # Empty file sets don't count as stuck
    if file_sets[0] == frozenset():
        return False
    return len(set(file_sets)) == 1


if __name__ == '__main__':
    project = sys.argv[1] if len(sys.argv) > 1 else ''
    if not project:
        print("Usage: stuck_check.py <project-name>", file=sys.stderr)
        sys.exit(2)
    entries = read_entries()
    if is_stuck(project, entries):
        print(f"STUCK: project '{project}' has touched the same files 3 times in a row")
        sys.exit(1)
    print("ok")
    sys.exit(0)