from sqlalchemy import text

from config.pgDb import pg_pool
from config.ssDb import mssql_pool


def executeSQL(sql: str):
    """
    执行 SQL 并返回结果列表，每行是 dict
    """
    with mssql_pool.getConn() as conn:
        result = conn.execute(text(sql))
        # SQLAlchemy 2.x 返回 Row 对象，转成 dict
        return [dict(row._mapping) for row in result]


def execute_parameterized_sql(sql: str, params: dict | None = None):
    """执行参数化只读 SQL，返回列名和字典行。"""
    with mssql_pool.getConn() as conn:
        result = conn.execute(text(sql), params or {})
        columns = list(result.keys())
        rows = [dict(row._mapping) for row in result]
    return columns, rows


def execute_parameterized_scalar(sql: str, params: dict | None = None):
    with mssql_pool.getConn() as conn:
        result = conn.execute(text(sql), params or {})
        return result.scalar()


def get_company_list(user_id: str):
    # 1️⃣ 从 PostgreSQL 获取 tenant_id
    with pg_pool.getConn() as pg_conn:
        with pg_conn.cursor() as cur:
            cur.execute(
                "SELECT bbit_tenant_id FROM sys_users WHERE id = %s", (user_id,)
            )
            row = cur.fetchone()
            tenant_id = row[0] if row else None

    # 2️⃣ 从 SQL Server 查询租户信息
    if tenant_id:
        query = text("SELECT Id, Name FROM dbo.POC_TENANTS WHERE Id = :tenant_id")
        params = {"tenant_id": tenant_id}
    else:
        query = text("SELECT Id, Name FROM dbo.POC_TENANTS")
        params = {}

    with mssql_pool.getConn() as mssql_conn:
        result = mssql_conn.execute(query, params)
        return [{"id": str(row[0]), "name": row[1]} for row in result.fetchall()]


def get_user_company_scope(user_id: str):
    """返回数据助手使用的租户范围；用户不存在时绝不能按全局用户处理。"""
    with pg_pool.getConn() as pg_conn:
        with pg_conn.cursor() as cur:
            cur.execute(
                "SELECT bbit_tenant_id FROM sys_users WHERE id = %s", (user_id,)
            )
            row = cur.fetchone()

    if not row:
        return {"canGlobal": False, "companies": []}

    tenant_id = row[0]
    if tenant_id:
        query = text("SELECT Id, Name FROM dbo.POC_TENANTS WHERE Id = :tenant_id")
        params = {"tenant_id": tenant_id}
        can_global = False
    else:
        query = text("SELECT Id, Name FROM dbo.POC_TENANTS ORDER BY Name")
        params = {}
        can_global = True

    with mssql_pool.getConn() as mssql_conn:
        result = mssql_conn.execute(query, params)
        companies = [
            {"id": str(item[0]), "name": item[1]} for item in result.fetchall()
        ]
    return {"canGlobal": can_global, "companies": companies}