import dagster as dg
from dagster_snowflake import SnowflakeResource
from src.utils.snowflake.constants import Warehouse
from src.utils.snowflake.query import load_query
from src.utils.snowflake.partition_utils import parse_hourly_partition_key

SURVEY_QUESTIONS_TABLE_NAME = "RDS_SURVEY_QUESTIONS"
WAREHOUSE = Warehouse.SUNO_PROD_RDS_HOURLY_X_SMALL.value


@dg.asset_check(asset="rds_survey_questions", description="Verify ID uniqueness within partition", blocking=False)
def check_survey_questions_id_uniqueness(context: dg.AssetCheckExecutionContext, snowflake: SnowflakeResource) -> dg.AssetCheckResult:
    """
    Checks for ID uniqueness within the current hourly partition of the RDS_SURVEY_QUESTIONS table.
    """
    partition_key = context.op_execution_context.partition_key
    p_date, p_hour = parse_hourly_partition_key(partition_key)

    with snowflake.get_connection() as conn:
        cursor = conn.cursor()
        cursor.execute(load_query("src/utils/snowflake/queries/use_warehouse.sql", params={"warehouse": WAREHOUSE}))

        query = f"""
            SELECT
                COUNT(*),
                COUNT(DISTINCT ID),
                COUNT(*) - COUNT(DISTINCT ID)
            FROM {SURVEY_QUESTIONS_TABLE_NAME}
            WHERE P_DATE = '{p_date}' AND P_HOUR = {p_hour}
        """
        cursor.execute(query)
        total, distinct, dupes = cursor.fetchone() or (0, 0, 0)

        return dg.AssetCheckResult(
            passed=dupes == 0,
            description=f"{'Unique' if dupes == 0 else f'{dupes} duplicates'}",
            metadata={
                "total_rows": total,
                "distinct_ids": distinct,
                "duplicates": dupes,
                "partition_key": partition_key,
            }
        )


asset_checks = [
    check_survey_questions_id_uniqueness,
]

__all__ = ["asset_checks"]