"""验证 SCD2 修复后 assistant_level_name NULL 情况"""
import os, sys
from pathlib import Path
from dotenv import load_dotenv

load_dotenv(Path(__file__).resolve().parents[2] / ".env")

import psycopg2
import psycopg2.extras

dsn = os.environ.get("PG_DSN")
if not dsn:
    raise RuntimeError("PG_DSN 未设置")

conn = psycopg2.connect(dsn)
cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)

# 1. daily_detail 中 NULL level_name 统计
cur.execute("""
    SELECT 
        COUNT(*) AS total,
        COUNT(*) FILTER (WHERE assistant_level_name IS NULL) AS null_name,
        COUNT(*) FILTER (WHERE assistant_level_name IS NOT NULL) AS non_null_name
    FROM dws.dws_assistant_daily_detail
""")
row = cur.fetchone()
print("=== dws_assistant_daily_detail ===")
print(f"  总行数: {row['total']}")
print(f"  level_name NULL: {row['null_name']}")
print(f"  level_name 非NULL: {row['non_null_name']}")

# 2. monthly_summary 中 NULL level_name 统计
cur.execute("""
    SELECT 
        COUNT(*) AS total,
        COUNT(*) FILTER (WHERE assistant_level_name IS NULL) AS null_name,
        COUNT(*) FILTER (WHERE assistant_level_name IS NOT NULL) AS non_null_name
    FROM dws.dws_assistant_monthly_summary
""")
row = cur.fetchone()
print("\n=== dws_assistant_monthly_summary ===")
print(f"  总行数: {row['total']}")
print(f"  level_name NULL: {row['null_name']}")
print(f"  level_name 非NULL: {row['non_null_name']}")

# 3. 如果 daily 还有 NULL，看看是哪些
cur.execute("""
    SELECT assistant_id, stat_date, assistant_level_code, assistant_level_name
    FROM dws.dws_assistant_daily_detail
    WHERE assistant_level_name IS NULL
    ORDER BY stat_date DESC
    LIMIT 10
""")
rows = cur.fetchall()
if rows:
    print("\n=== daily NULL level_name 样本 ===")
    for r in rows:
        print(f"  assistant_id={r['assistant_id']}, date={r['stat_date']}, code={r['assistant_level_code']}")
else:
    print("\n✅ daily_detail 中无 NULL level_name")

cur.close()
conn.close()