import pymysql
from sqlalchemy import create_engine, text
from urllib.parse import quote_plus

from utils.log import log

# 数据库配置
DB_CONFIG = {
    'host': '10.130.75.149',
    'port': 3307,
    'user': 'yto_crm',
    'password': '%3sFUlsolaRI',
    'database': 'crm_uat',
    'charset': 'utf8mb4'
}

def get_commodity_id(commodity_name):
    """根据商品名称查询数据库，获取商品 ID 和商品名称"""
    fix_commodity_name = commodity_name
    if commodity_name.endswith("）") or commodity_name.endswith(")"):
        fix_commodity_name = commodity_name.rsplit("（")[0] or commodity_name.rsplit("(")[0]
    fix_commodity_name = fix_commodity_name.replace('*', '').replace('#', '').replace('“', '').replace('”', '').replace('。', '')

    try:
        # 连接数据库
        connection = pymysql.connect(**DB_CONFIG)
        with connection.cursor() as cursor:
            # 执行查询
            sql = "SELECT e.id, e.commodity_name FROM t_yujin_crossborder_prov_commodity_category e WHERE e.commodity_name like %s"
            cursor.execute(sql, (f"{fix_commodity_name}%",))
            result = cursor.fetchall()
            if result:
                if len(result) == 1:
                    return result[0][0], result[0][1]
                else:
                    log.info(f"查询结果为多条，商品id为：{result}，fix_commodity_name：{fix_commodity_name}，commodity_name: {commodity_name}")
                    sql = "SELECT e.id, e.commodity_name FROM t_yujin_crossborder_prov_commodity_category e WHERE e.commodity_name = %s"
                    cursor.execute(sql, (f"{fix_commodity_name}",))
                    result = cursor.fetchone()
                    if not result:
                        # 用原商品名称再查一次
                        commodity_name = commodity_name.replace("(", "（").replace(")", "）")
                        log.info(f"原商品名称查询，commodity_name：{commodity_name}")
                        sql = "SELECT e.id, e.commodity_name FROM t_yujin_crossborder_prov_commodity_category e WHERE e.commodity_name = %s"
                        cursor.execute(sql, (f"{commodity_name}",))
                        result = cursor.fetchone()
                        if result:
                            return result[0], result[1]
                        else:
                            return None, None
                    else:
                        return result[0], result[1]
            else:
                return None, None
    except Exception as e:
        log.info(f"查询数据库时发生异常: {str(e)}")
        return None, None
    finally:
        if connection:
            connection.close()


def get_hs_all():
    try:
        # 连接数据库
        connection = pymysql.connect(**DB_CONFIG)
        with connection.cursor() as cursor:
            # 执行查询
            sql = "SELECT e.id,e.category_name FROM t_yujin_crossborder_hs_category e"
            cursor.execute(sql)
            all_records = cursor.fetchall()
            if all_records:
                return all_records
            else:
                return None
    except Exception as e:
        log.info(f"查询数据库时发生异常: {str(e)}")
        return None
    finally:
        if connection:
            connection.close()

# 对密码进行 URL 编码
encoded_password = quote_plus(DB_CONFIG["password"])

# 构建 SQLAlchemy 引擎
engine = create_engine(
    f"mysql+pymysql://{DB_CONFIG['user']}:{encoded_password}@{DB_CONFIG['host']}:{DB_CONFIG['port']}/{DB_CONFIG['database']}?charset={DB_CONFIG['charset']}",
    pool_size=5,
    max_overflow=10
)

def bulk_insert(sql_statements):
    """
    批量执行 SQL 插入语句
    :param sql_statements: 包含多个 INSERT 语句的列表
    """
    if not sql_statements:
        log.info("未提供有效的 SQL 插入语句，跳过操作")
        return

    try:
        with engine.connect() as conn:
            with conn.begin():
                for sql in sql_statements:
                    stmt = text(sql.strip())
                    conn.execute(stmt)
                log.info(f"成功执行 {len(sql_statements)} 条 SQL 插入语句")
    except Exception as e:
        log.info(f"数据库操作失败: {str(e)}")
        raise

def update_january_yoy(prov_name):
    """
    更新指定省份1月份同比数据
    :param prov_name: 省份名称，默认为福建省
    """
    update_sql = text("""
                      UPDATE t_yujin_crossborder_prov_region_trade AS curr
                          INNER JOIN t_yujin_crossborder_prov_region_trade AS prev
                      ON curr.city_code = prev.city_code
                          AND prev.crossborder_year_month = DATE_FORMAT(
                          DATE_SUB(
                          STR_TO_DATE(CONCAT(curr.crossborder_year_month, '-01'), '%Y-%m-%d'),
                          INTERVAL 1 YEAR
                          ),
                          '%Y-01'
                          )
                          SET
                              curr.yoy_import_export = COALESCE (
                              ROUND(
                              (curr.monthly_total - prev.monthly_total) / NULLIF (prev.monthly_total, 0) * 100, 4
                              ), 0.0000
                              ), curr.yoy_import = COALESCE (
                              ROUND(
                              (curr.monthly_import - prev.monthly_import) / NULLIF (prev.monthly_import, 0) * 100, 4
                              ), 0.0000
                              ), curr.yoy_export = COALESCE (
                              ROUND(
                              (curr.monthly_export - prev.monthly_export) / NULLIF (prev.monthly_export, 0) * 100, 4
                              ), 0.0000
                              )
                      WHERE
                          curr.prov_name = :prov_name
                        AND curr.crossborder_year_month LIKE '%-01'
                        AND curr.crossborder_year_month
                          > '2023-01'
                      """)

    try:
        with engine.begin() as conn:
            result = conn.execute(update_sql, {'prov_name': prov_name})
            log.info(f"Updated {result.rowcount} rows for {prov_name}")
            return result.rowcount

    except Exception as e:
        log.info(f"Update failed: {str(e)}")
        raise RuntimeError(f"同比数据更新失败: {str(e)}") from e

def clear_old_shandong_yoy(prov_name):
    """
    清理山东省2024年前数据的同比指标
    """
    clear_sql = text("""
                     UPDATE t_yujin_crossborder_prov_region_trade
                     SET yoy_import_export = 0.0000,
                         yoy_export        = 0.0000,
                         yoy_import        = 0.0000
                     WHERE prov_name = :prov_name
                       AND crossborder_year_month < '2024-01'
                       AND (yoy_import_export != 0 
           OR yoy_export != 0 
           OR yoy_import != 0) -- 优化：仅更新非零记录
                     """)

    try:
        with engine.begin() as conn:
            result = conn.execute(clear_sql, {'prov_name': prov_name})
            log.info(f"{prov_name} 旧数据清零记录数: {result.rowcount}")
            return result.rowcount
    except Exception as e:
        log.info(f"旧数据清零失败: {str(e)}")
        raise

def update_shandong_yoy(prov_name):
    """
    完整更新山东省同比数据（包含新旧数据处理）
    """
    try:
        # 步骤1：清理旧数据
        cleared = clear_old_shandong_yoy(prov_name)

        # 步骤2：计算新数据
        updated = _update_shandong_new_yoy(prov_name)

        log.info(f"{prov_name} 同比处理完成 | 清零:{cleared} 更新:{updated}")
        return {'cleared': cleared, 'updated': updated}
    except Exception as e:
        log.info("{prov_name} 数据处理失败", exc_info=True)
        raise

def _update_shandong_new_yoy(prov_name):
    """
    处理2024年及之后的山东省数据（内部方法）
    """
    update_sql = text("""UPDATE t_yujin_crossborder_prov_region_trade AS curr
                                INNER JOIN t_yujin_crossborder_prov_region_trade AS prev
                            ON curr.city_code = prev.city_code
                                AND prev.crossborder_year_month = DATE_FORMAT(
                                    DATE_SUB(
                                        STR_TO_DATE(CONCAT(curr.crossborder_year_month, '-01'), '%Y-%m-%d'),
                                        INTERVAL 1 YEAR
                                    ),
                                    '%Y-%m'
                                )
                            SET
                                curr.yoy_import_export = COALESCE (
                                    TRUNCATE((curr.monthly_total - prev.monthly_total) / NULLIF (prev.monthly_total, 0) * 100, 4),
                                    0.0000
                                ),
                                curr.yoy_import = COALESCE (
                                    TRUNCATE((curr.monthly_import - prev.monthly_import) / NULLIF (prev.monthly_import, 0) * 100, 4),
                                    0.0000
                                ),
                                curr.yoy_export = COALESCE (
                                    TRUNCATE((curr.monthly_export - prev.monthly_export) / NULLIF (prev.monthly_export, 0) * 100, 4),
                                    0.0000
                                )
                            WHERE
                                curr.prov_name = :prov_name
                              AND curr.crossborder_year_month >= '2024-01'
                              AND prev.monthly_total IS NOT NULL
                        """)

    with engine.begin() as conn:
        result = conn.execute(update_sql, {'prov_name': prov_name})
        log.info(f"{prov_name} 新数据更新数: {result.rowcount}")
        return result.rowcount


if __name__ == '__main__':
    update_january_yoy('浙江省')
    update_shandong_yoy('浙江省')
    log.info("同比sql处理完成")