"""Skill 数据访问。"""

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.skills import Skill


async def add_skill(session: AsyncSession, skill: Skill) -> None:
    session.add(skill)
    await session.flush()


async def get_skill(session: AsyncSession, skill_id: str) -> Skill | None:
    return await session.get(Skill, skill_id)


async def get_skill_by_name(session: AsyncSession, name: str) -> Skill | None:
    result = await session.execute(select(Skill).where(Skill.name == name))
    return result.scalar_one_or_none()


async def list_skills(session: AsyncSession, *, status: str | None = None) -> list[Skill]:
    conditions = []
    if status is not None:
        conditions.append(Skill.status == status)
    stmt = select(Skill)
    if conditions:
        stmt = stmt.where(*conditions)
    stmt = stmt.order_by(Skill.created_at.desc())
    result = await session.execute(stmt)
    return list(result.scalars().all())