# Procyon — self-improvement loop. Logs outcomes, surfaces what works.

import db


def log_outcome(app_id, stage, notes=''):
    db.add_outcome(app_id, stage, notes)
    db.update_application(app_id, status=stage)


def insights():
    """Aggregate outcomes -> simple actionable insights."""
    conn = db.get_conn()
    try:
        rows = conn.execute(
            'SELECT stage, COUNT(*) c FROM outcomes GROUP BY stage').fetchall()
        sent = conn.execute(
            "SELECT COUNT(*) c FROM applications WHERE outcome IN ('response','interview','offer')"
        ).fetchone()['c']
        total = conn.execute('SELECT COUNT(*) c FROM applications').fetchone()['c']
        by_stage = {r['stage']: r['c'] for r in rows}
        resp_rate = round(sent / total, 3) if total else 0.0
        return {
            'total_applications': total,
            'by_stage': by_stage,
            'positive_outcomes': sent,
            'response_rate': resp_rate,
            'note': ('Response rate is positive-outcome / total applications. '
                     'Higher = your tailoring and targeting are landing.'),
        }
    finally:
        conn.close()