"""
author: CT
description: 从 Hive dim_keepa_asin_info 读取 keepa 数据，过滤 updated_time 超过 3 个月的 asin（keepa 过期），
             并关联近期有月销的 asin（dwt_flow_asin 最近 3 个月 ∪ Doris dwt.{site}_flow_asin_30day），
             只导出"过期 + 近期有月销"的 asin 到 PG us_asin_profit_keepa_add，触发爬虫重新抓取 Keepa。
             导出前 LEFT ANTI 剔除 PG 表中已存在的 asin，避免重复触发。
执行示例: spark-submit export_keepa_asin_del.py us
"""
import os
import sys
from datetime import datetime
from dateutil.relativedelta import relativedelta

sys.path.append(os.path.dirname(sys.path[0]))

from pyspark.sql import functions as F

from utils.spark_util import SparkUtil
from utils.db_util import DBUtil
from utils.DorisHelper import DorisHelper

if __name__ == '__main__':
    site_name = sys.argv[1]

    spark = SparkUtil.get_spark_session(f'export_keepa_asin_del_{site_name}')

    # 1. 全量读取 keepa 数据（updated_time 过滤改到 Spark 端）
    sql_keepa = f"""
        SELECT asin, updated_time
        FROM dim_keepa_asin_info
        WHERE site_name = '{site_name}'
    """
    print(f"sql_keepa=\n{sql_keepa}")
    df_keepa = spark.sql(sqlQuery=sql_keepa).cache()
    print(f"全量读取 keepa 数据：{df_keepa.count():,}")

    # 2. 过滤超过 3 个月的 asin（keepa 过期）
    three_months_ago = (datetime.now() - relativedelta(months=3)).strftime('%Y-%m-%d %H:%M:%S')
    print(f"过滤阈值 updated_time < {three_months_ago}")

    df_keepa_expired = df_keepa.filter(F.col('updated_time') < F.lit(three_months_ago)) \
        .select('asin') \
        .dropDuplicates(['asin']) \
        .repartition(40, 'asin') \
        .cache()
    print(f"keepa 过期 asin 数量：{df_keepa_expired.count():,}")

    # 3. 读取 Hive dwt_flow_asin 最近 3 个月（基于 MySQL workflow_everyday 最大 report_date 向前推 3 个月）、月销 > 0 的 asin
    sql_max_month = f"select MAX(report_date) as date_info from workflow_everyday where site_name = '{site_name}' and date_type = 'month' and page = '流量选品'"
    print(f"sql_max_month=\n{sql_max_month}")
    mysql_con = DBUtil.get_connection_info('mysql', site_name)
    max_date_info = SparkUtil.read_jdbc_query(
        session=spark, url=mysql_con['url'],
        pwd=mysql_con['pwd'], username=mysql_con['username'], query=sql_max_month,
    ).collect()[0]['date_info']
    print(f"workflow_everyday 最大 report_date：{max_date_info}")
    base_dt = datetime.strptime(str(max_date_info), '%Y-%m')
    months_3 = [(base_dt - relativedelta(months=i)).strftime('%Y-%m') for i in range(3)]
    months_in = ",".join([f"'{m}'" for m in months_3])
    print(f"取最近 3 个月：{months_3}")

    sql_dwt = f"""
        SELECT asin, asin_bought_month
        FROM dwt_flow_asin
        WHERE site_name = '{site_name}'
          AND date_type = 'month'
          AND date_info IN ({months_in})
          AND asin_bought_month > 0
    """
    print(f"sql_dwt=\n{sql_dwt}")
    df_dwt_sales = spark.sql(sqlQuery=sql_dwt).repartition(40, 'asin')

    # 4. 读取 Doris dwt.{site}_flow_asin_30day asin + 月销
    #    spark_import_with_connector 不支持 WHERE 下推，asin_bought_month > 0 过滤改到 Spark 端；
    #    doris.read.field 不保证只返回指定字段，显式 select 收窄 schema 确保 union 兼容
    table_identifier = f"dwt.{site_name}_flow_asin_30day"
    read_fields = "asin,asin_bought_month"
    df_doris_sales = DorisHelper.spark_import_with_connector(spark, table_identifier, read_fields) \
        .filter(F.col('asin_bought_month') > 0) \
        .select(F.col('asin'), F.col('asin_bought_month')) \
        .repartition(40, 'asin')

    # 5. union 两源，按 asin 聚合月销累加，过滤累加月销 >= 50
    SALES_THRESHOLD = 50
    df_asin_with_sales = df_dwt_sales.unionByName(df_doris_sales) \
        .groupBy('asin') \
        .agg(F.sum('asin_bought_month').alias('total_bought_month')) \
        .filter(F.col('total_bought_month') >= SALES_THRESHOLD) \
        .select('asin') \
        .repartition(40, 'asin') \
        .cache()
    print(f"累加月销 >= {SALES_THRESHOLD} 的 asin 数量：{df_asin_with_sales.count():,}")

    # 6. INNER JOIN：只保留"过期 + 近期有月销"的 asin
    df_target = df_keepa_expired.join(df_asin_with_sales, on='asin', how='inner').cache()
    print(f"过期且近期有月销的 asin 数量：{df_target.count():,}")

    # 7. 读取 PG 已导出 asin（去重），用于 LEFT ANTI 剔除
    con_info = DBUtil.get_connection_info(db_type='postgresql_cluster', site_name=site_name)
    table_name = 'us_asin_profit_keepa_add'
    df_pg_existing = spark.read.format("jdbc") \
        .option("url", con_info["url"]) \
        .option("dbtable", table_name) \
        .option("user", con_info["username"]) \
        .option("password", con_info["pwd"]) \
        .load() \
        .select('asin') \
        .dropDuplicates(['asin']).cache()
    print(f"PG 已导出 asin 数量：{df_pg_existing.count():,}")

    # 8. LEFT ANTI 剔除已导出 + 附加 month 字段（过期 keepa 默认 month = '1970-01'）
    df_need_export = df_target \
        .join(df_pg_existing, on='asin', how='left_anti') \
        .select(
            F.col('asin'),
            F.lit('1970-01').alias('month'),
        ).cache()
    print(f"导出数据量：{df_need_export.count():,}")

    df_need_export.write.format("jdbc") \
        .option("url", con_info["url"]) \
        .option("dbtable", table_name) \
        .option("user", con_info["username"]) \
        .option("password", con_info["pwd"]) \
        .mode("append") \
        .save()

    df_keepa.unpersist()
    df_keepa_expired.unpersist()
    df_asin_with_sales.unpersist()
    df_target.unpersist()
    df_pg_existing.unpersist()
    df_need_export.unpersist()
    print("success")
