import os
from datetime import datetime
from fastapi import APIRouter

from ... import config as app_config

router = APIRouter()


@router.get("/status")
def is_running():
    """Return a small status dict: whether pipeline appears to be running and last run time."""
    json_folder = os.path.join(app_config.DATA_DIR, 'merged', 'features')
    has_json = False
    if os.path.exists(json_folder):
        try:
            has_json = any(f.endswith('.json') for f in os.listdir(json_folder))
        except Exception:
            has_json = False

    last_run_file = app_config.LAST_RUN_PATH
    last_run_display = 'Unknown'
    try:
        if os.path.exists(last_run_file):
            with open(last_run_file, 'r') as f:
                last_run_str = f.read().strip()
            last_run_dt = datetime.strptime(last_run_str, '%Y-%m-%d %H:%M:%S')
            minutes_ago = int((datetime.now() - last_run_dt).total_seconds() // 60)
            last_run_display = f"{minutes_ago} minutes ago"
    except Exception:
        last_run_display = 'Unknown'

    status = "Running" if not has_json else "Not Running"
    return {"status": status, "last_run": last_run_display}