#  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.

import os
import asyncio

import ray
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
from sqlalchemy.orm import sessionmaker
from sqlmodel import SQLModel

from pretor.core.database.module.individual import IndividualDatabase
from pretor.core.database.module.user import AuthDatabase
from pretor.core.database.module.provider import ProviderDatabase
from pretor.core.database.module.system_node import SystemNodeDatabase

@ray.remote
class PostgresDatabase:
    def __init__(self):
        user = os.environ.get('POSTGRES_USER')
        password = os.environ.get('POSTGRES_PASSWORD')
        host = os.environ.get('POSTGRES_HOST')
        port = os.environ.get('POSTGRES_PORT')
        database = os.environ.get('POSTGRES_DB')
        database_url = f"postgresql+asyncpg://{user}:{password}@{host}:{port}/{database}"
        self.async_engine = create_async_engine(database_url, echo=True)
        self.async_session_maker = sessionmaker(self.async_engine, class_=AsyncSession, expire_on_commit=False)

        self._auth_database = AuthDatabase(self.async_session_maker)
        self._provider_database = ProviderDatabase(self.async_session_maker)
        self._individual_database = IndividualDatabase(self.async_session_maker)
        self._system_node_database = SystemNodeDatabase(self.async_session_maker)

        self.ready_event = asyncio.Event()

    async def init_db(self) -> None:
        try:
            async with self.async_engine.begin() as conn:
                await conn.run_sync(SQLModel.metadata.create_all)
        except Exception as e:
            # Provide a warning if the database is not accessible, allowing
            # the app to start up for development/UI tests without crashing immediately.
            print(f"Warning: Failed to initialize PostgreSQL database: {e}")
        finally:
            self.ready_event.set()

    # Auth Database Methods
    async def add_user(self, user_name: str, hashed_password: str):
        await self.ready_event.wait()
        return await self._auth_database.add_user(user_name, hashed_password)

    async def change_password(self, user_name, old_password, new_password):
        await self.ready_event.wait()
        return await self._auth_database.change_password(user_name, old_password, new_password)

    async def delete_user(self, user_name: str):
        await self.ready_event.wait()
        return await self._auth_database.delete_user(user_name)

    async def delete_user_by_id(self, user_id: str):
        await self.ready_event.wait()
        return await self._auth_database.delete_user_by_id(user_id)

    async def login_user(self, user_name: str):
        await self.ready_event.wait()
        return await self._auth_database.login_user(user_name)

    async def get_all_users(self):
        await self.ready_event.wait()
        return await self._auth_database.get_all_users()

    async def get_user_authority(self, user_id: str):
        await self.ready_event.wait()
        return await self._auth_database.get_user_authority(user_id)

    async def change_user_authority(self, user_id: str, new_authority):
        await self.ready_event.wait()
        return await self._auth_database.change_user_authority(user_id, new_authority)

    # Provider Database Methods
    async def get_provider(self):
        await self.ready_event.wait()
        return await self._provider_database.get_provider()

    async def add_provider_db(self, **kwargs):
        await self.ready_event.wait()
        return await self._provider_database.add_provider(**kwargs)

    async def delete_provider_db(self, provider_id: str):
        await self.ready_event.wait()
        return await self._provider_database.delete_provider(provider_id)

    async def update_provider_db(self, provider_id: str, **kwargs):
        await self.ready_event.wait()
        return await self._provider_database.update_provider(provider_id, **kwargs)

    # System Node Database Methods
    async def upsert_system_node_config(self, node_name: str, provider_title: str, model_id: str, tools: list[str] = None):
        await self.ready_event.wait()
        return await self._system_node_database.upsert_system_node_config(node_name, provider_title, model_id, tools)

    async def get_all_system_node_configs(self):
        await self.ready_event.wait()
        return await self._system_node_database.get_all_system_node_configs()

    # Individual Database Methods
    async def add_worker_individual(self, **kwargs):
        await self.ready_event.wait()
        return await self._individual_database.add_worker_individual(**kwargs)

    async def get_worker_individual(self, agent_id: str):
        await self.ready_event.wait()
        return await self._individual_database.get_worker_individual(agent_id)

    async def get_worker_individual_list(self, owner_id: str):
        await self.ready_event.wait()
        return await self._individual_database.get_worker_individual_list(owner_id)

    async def update_worker_individual(self, agent_id: str, **kwargs):
        await self.ready_event.wait()
        return await self._individual_database.update_worker_individual(agent_id, **kwargs)

    async def delete_worker_individual(self, agent_id: str):
        await self.ready_event.wait()
        return await self._individual_database.delete_worker_individual(agent_id)

    async def get_all_worker_individual(self):
        await self.ready_event.wait()
        return await self._individual_database.get_all_worker_individual()