import httpx

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


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

    async def register(self, username: str, password: str):
        password = RagflowCrypto(settings.PUBLIC_KEY, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/v1/user/register",
                json={"nickname": username, "email": f"{username}@example.com", "password": password},
                headers={'Content-Type': 'application/json'}
            )
            if response.status_code != 200:
                raise Exception(f"Ragflow registration failed: {response.text}")

    async def login(self, username: str, password: str) -> str:
        password = RagflowCrypto(settings.PUBLIC_KEY, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/v1/user/login",
                json={"email": f"{username}@example.com", "password": password},
                headers={'Content-Type': 'application/json'}
            )
            if response.status_code != 200:
                raise Exception(f"Ragflow login failed: {response.text}")
                # 从响应头中提取 Authorization 字段
            authorization = response.headers.get('Authorization')
            if not authorization:
                raise Exception("Authorization header not found in response")
            return authorization

    async def chat(self, token: str, chat_id: str, chat_history: list):
        data = {
            "conversation_id": chat_id,
            "messages": chat_history
        }
        target_url = f"{self.base_url}/v1/conversation/completion"
        async with httpx.AsyncClient() as client:
            headers = {
                'Content-Type': 'application/json',
                'Authorization': token
            }
            # 创建流式请求
            async with client.stream("POST", target_url, json=data, headers=headers) as response:
                # 检查响应状态码
                if response.status_code == 200:
                    # 流式读取响应
                    try:
                        async for answer in response.aiter_text():
                            yield answer
                    except GeneratorExit as e:
                        print(e)
                        return
                else:
                    yield f"Error: {response.status_code}"

    async def get_chat_sessions(self, token: str, dialog_id: str) -> list:
        url = f"{self.base_url}/v1/conversation/list?dialog_id={dialog_id}"
        headers = {
            "Authorization": token
        }
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            if response.status_code != 200:
                raise Exception(f"Failed to fetch data from Ragflow API: {response.text}")

            data = response.json().get("data", [])
            result = [
                {
                    "id": item["id"],
                    "name": item["name"],
                    "updated_time": item["update_time"]
                }
                for item in data
            ]
            return result

    async def set_session(self, token: str, dialog_id: str, name: str, chat_id: str, is_new: bool) -> list:
        url = f"{self.base_url}/v1/conversation/set?dialog_id={dialog_id}"
        headers = {
            "Authorization": token
        }

        data = {
                "dialog_id": dialog_id,
                "name": name,
                "is_new": is_new,
                "conversation_id": chat_id,
            }

        async with httpx.AsyncClient() as client:
            response = await client.post(url, headers=headers, json=data)
            if response.status_code != 200:
                return []
            ret_code = response.json().get("retcode")
            if ret_code != 0:
                return []

            return [
                {
                    "content": "你好！ 我是你的助理，有什么可以帮到你的吗？",
                    "role": "assistant"
                },
                {
                    "content": name,
                    "doc_ids": [],
                    "role": "user"
                }
            ]