from datetime import datetime
import httpx

from app.config.config import settings
from app.utils.rsa_crypto import BishengCrypto


class BishengService:
    def __init__(self, base_url: str):
        self.base_url = base_url

    def _check_response(self, response: httpx.Response):
        if response.status_code not in [200, 201]:
            raise Exception(f"Failed to fetch data from Bisheng API: {response.text}")
        response_data = response.json()
        status_code = response_data.get("status_code", 0)
        if status_code != 200:
            raise Exception(f"Failed to fetch data from Bisheng API: {response.text}")
        # 检查返回的数据类型
        if isinstance(response_data.get("data"), dict):
            return response_data.get("data", {})
        elif isinstance(response_data.get("data"), list):
            return response_data.get("data", [])
        else:
            return {}

    async def register(self, username: str, password: str):
        public_key = await self.get_public_key_api()
        password = BishengCrypto(public_key, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/api/v1/user/regist",
                json={"user_name": username, "password": password},
                headers={'Content-Type': 'application/json'}
            )
            return self._check_response(response)

    async def login(self, username: str, password: str) -> str:
        public_key = await self.get_public_key_api()
        password = BishengCrypto(public_key, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/api/v1/user/login",
                json={"user_name": username, "password": password},
                headers={'Content-Type': 'application/json'}
            )
            data = self._check_response(response)
            return data.get('access_token')

    async def get_public_key_api(self) -> dict:
        async with httpx.AsyncClient() as client:
            response = await client.get(
                f"{self.base_url}/api/v1/user/public_key",
                headers={'Content-Type': 'application/json'}
            )
            data = self._check_response(response)
            return data.get('public_key')

    async def get_chat_sessions(self, token: str) -> list:
        url = f"{self.base_url}/api/v1/chat/list?page=1&limit=40"
        headers = {'cookie': f"access_token_cookie={token};"}
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            data = self._check_response(response)

            result = [
                {
                    "id": item["chat_id"],
                    "name": item["latest_message"]["message"],
                    "updated_time": int(datetime.strptime(item["update_time"], "%Y-%m-%dT%H:%M:%S").timestamp() * 1000)
                }
                for item in data
            ]
            return result

    async def get_session_log(self, token: str, agent_id: str, conversation_id: str):
        url = (
            f"{self.base_url}/api/v1/chat/history?"
            f"flow_id={agent_id}&"
            f"chat_id={conversation_id}&page_size=30&id="
        )
        headers = {'cookie': f"access_token_cookie={token};"}
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            response.raise_for_status()
            data = self._check_response(response)
            session_log = [
                    {
                        "message": message.get("message"),
                        "role": message.get("category"),
                        "ts": message.get("create_time")
                    }
                    for message in data
                ]

            # 把session_log 按ts 升序排序
            session_log.sort(key=lambda x: x['ts'])
            return session_log

    async def variable_list(self, token: str, agent_id: str) -> list:
        url = f"{self.base_url}/api/v1/variable/list?flow_id={agent_id}"
        headers = {'cookie': f"access_token_cookie={token};"}
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            data = self._check_response(response)
            return data

    async def upload(self, token: str, filename: str, file: bytes) -> dict:
        url = f"{self.base_url}/api/v1/knowledge/upload"
        headers = {'cookie': f"access_token_cookie={token};"}

        # 创建表单数据，包含文件
        files = {"file": (filename, file)}
        async with httpx.AsyncClient() as client:
            response = await client.post(url, headers=headers, files=files)
            data = self._check_response(response)
            file_path = data.get("file_path", "")
            result = {
                "file_path": file_path
            }

            return result

    async def user_list(self, token: str) -> list:
        url = f"{self.base_url}/api/v1/user/list"
        headers = {'cookie': f"access_token_cookie={token};"}
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            data = self._check_response(response)
            return data


    async def change_password_public(self, token: str, username: str, password: str, new_password:str) -> dict:
        url = f"{self.base_url}/api/v1/user/change_password_public"
        headers = {'cookie': f"access_token_cookie={token};"}
        public_key = await self.get_public_key_api()
        password = BishengCrypto(public_key, settings.PRIVATE_KEY).encrypt(password)
        new_password = BishengCrypto(public_key, settings.PRIVATE_KEY).encrypt(new_password)
        json = {"username": username, "password": password, "new_password": new_password}
        async with httpx.AsyncClient() as client:
            response = await client.post(url, headers=headers, json=json)
            data = self._check_response(response)

            return data