import json

from .base import Base


class Session(Base):
    def __init__(self, rag, res_dict):
        self.id = None
        self.name = "New session"
        self.messages = [
            {"role": "assistant", "content": "Hi! I am your assistant，can I help you?"}
        ]
        for key, value in res_dict.items():
            if key == "chat_id" and value is not None:
                self.chat_id = None
                self.__session_type = "chat"
            if key == "agent_id" and value is not None:
                self.agent_id = None
                self.__session_type = "agent"
        super().__init__(rag, res_dict)

    def ask(self, question="", stream=True, **kwargs):
        if self.__session_type == "agent":
            res = self._ask_agent(question, stream)
        elif self.__session_type == "chat":
            res = self._ask_chat(question, stream, **kwargs)
        for line in res.iter_lines():
            line = line.decode("utf-8")
            if line.startswith("{"):
                json_data = json.loads(line)
                raise Exception(json_data["message"])
            if not line.startswith("data:"):
                continue
            json_data = json.loads(line[5:])
            if json_data["data"] is True or json_data["data"].get("running_status"):
                continue
            answer = json_data["data"]["answer"]
            reference = json_data["data"].get("reference", {})
            temp_dict = {"content": answer, "role": "assistant"}
            if reference and "chunks" in reference:
                chunks = reference["chunks"]
                temp_dict["reference"] = chunks
            message = Message(self.rag, temp_dict)
            yield message

    def _ask_chat(self, question: str, stream: bool, **kwargs):
        json_data = {"question": question, "stream": True, "session_id": self.id}
        json_data.update(kwargs)
        res = self.post(f"/chats/{self.chat_id}/completions", json_data, stream=stream)
        return res

    def _ask_agent(self, question: str, stream: bool):
        res = self.post(
            f"/agents/{self.agent_id}/completions",
            {"question": question, "stream": True, "session_id": self.id},
            stream=stream,
        )
        return res

    def update(self, update_message):
        res = self.put(f"/chats/{self.chat_id}/sessions/{self.id}", update_message)
        res = res.json()
        if res.get("code") != 0:
            raise Exception(res.get("message"))


class Message(Base):
    def __init__(self, rag, res_dict):
        self.content = "Hi! I am your assistant，can I help you?"
        self.reference = None
        self.role = "assistant"
        self.prompt = None
        self.id = None
        super().__init__(rag, res_dict)
