#  Copyright 2026 zhaoxi826
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

from kilostar.core.postgres_database.model.individual import (
    BaseIndividualModel,
    SpecialistIndividualModel,
    OrdinaryIndividualModel,
    SpecialIndividualModel,
)
from sqlalchemy import select
from typing import List, Optional
from kilostar.core.postgres_database.database_exception import database_exception

from ulid import ULID

_AGENT_TYPE_MODEL_MAP = {
    "specialist": SpecialistIndividualModel,
    "ordinary": OrdinaryIndividualModel,
    "special": SpecialIndividualModel,
}


class IndividualDatabase:
    """Individual 表族（Base/Specialist/Ordinary/Special）的 DAO，按 agent_type 选择具体子表。"""

    def __init__(self, async_session_maker):
        self.async_session_maker = async_session_maker

    @staticmethod
    def _select_model(agent_type: str):
        return _AGENT_TYPE_MODEL_MAP.get(agent_type, BaseIndividualModel)

    @database_exception
    async def add_worker_individual(self, **kwargs):
        """新建一个 Worker Individual：自动生成 ULID，按 ``agent_type`` 选择对应子表写入。"""
        async with self.async_session_maker() as session:
            agent_id = str(ULID())
            agent_type = kwargs.get("agent_type", "base")
            model_cls = self._select_model(agent_type)
            individual = model_cls(agent_id=agent_id, **kwargs)
            session.add(individual)
            await session.commit()
            await session.refresh(individual)
            return individual

    @database_exception
    async def get_worker_individual(self, agent_id: str):
        """按 agent_id 取单个 Individual；不存在返回 None。"""
        async with self.async_session_maker() as session:
            statement = select(BaseIndividualModel).where(
                BaseIndividualModel.agent_id == agent_id
            )
            results = await session.execute(statement)
            return results.scalar_one_or_none()

    @database_exception
    async def get_worker_individual_list(self, owner_id: str):
        """读取某用户名下的所有 Individual。"""
        async with self.async_session_maker() as session:
            statement = select(BaseIndividualModel).where(
                BaseIndividualModel.owner_id == owner_id
            )
            results = await session.execute(statement)
            return list(results.scalars().all())

    @database_exception
    async def update_worker_individual(self, agent_id: str, **kwargs):
        """部分更新 Individual：只覆盖 kwargs 中非 None 的字段；找不到返回 None。"""
        async with self.async_session_maker() as session:
            statement = select(BaseIndividualModel).where(
                BaseIndividualModel.agent_id == agent_id
            )
            results = await session.execute(statement)
            individual = results.scalar_one_or_none()
            if not individual:
                return None
            for key, value in kwargs.items():
                if value is not None:
                    setattr(individual, key, value)
            session.add(individual)
            await session.commit()
            await session.refresh(individual)
            return individual

    @database_exception
    async def delete_worker_individual(self, agent_id: str) -> bool:
        """删除 Individual；不存在返回 False，删除成功返回 True。"""
        async with self.async_session_maker() as session:
            statement = select(BaseIndividualModel).where(
                BaseIndividualModel.agent_id == agent_id
            )
            results = await session.execute(statement)
            individual = results.scalar_one_or_none()
            if not individual:
                return False
            session.delete(individual)
            await session.commit()
            return True

    @database_exception
    async def get_all_worker_individual(self):
        """返回数据库中全部 Individual。"""
        async with self.async_session_maker() as session:
            statement = select(BaseIndividualModel)
            results = await session.execute(statement)
            return list(results.scalars().all())