import json
import logging
from dataclasses import dataclass

import requests

logger = logging.getLogger(__name__)


@dataclass
class ToolCall:
    id: str
    name: str
    arguments: dict[str, object]


@dataclass
class LLMResponse:
    content: str | None
    tool_calls: list[ToolCall]


class LLM:
    def __init__(self, url: str) -> None:
        self.url = url

    def chat(
        self,
        messages: list[dict[str, object]],
        tools: list[dict[str, object]] | None = None,
        max_tokens: int = 512,
    ) -> LLMResponse:
        payload: dict[str, object] = {
            "messages": messages,
            "max_tokens": max_tokens,
            "temperature": 0.9,
        }

        if tools is not None:
            payload["tools"] = tools

        logger.info("LLM request started")
        response = requests.post(
            self.url,
            json=payload,  # type: ignore[arg-type]
        )
        response.raise_for_status()

        data = response.json()
        logger.debug("LLM response: %s", data)
        # print(f"\n[debug: {data}]\n")
        message = data["choices"][0]["message"]

        content = message.get("content")

        tool_calls: list[ToolCall] = []

        for call in message.get("tool_calls", []):
            function = call["function"]

            tool_calls.append(
                ToolCall(
                    id=call["id"],
                    name=function["name"],
                    arguments=json.loads(function["arguments"]),
                )
            )

        logger.info(
            "LLM response received: tool_calls=%d, content_present=%s",
            len(tool_calls),
            content is not None,
        )

        return LLMResponse(
            content=content,
            tool_calls=tool_calls,
        )


if __name__ == "__main__":
    from personal_agent.tools import HelloTool, ToolRegistry

    registry = ToolRegistry()
    registry.register(HelloTool())
    llm = LLM("http://localhost:8080/v1/chat/completions")

    response = llm.chat(
        messages=[
            {
                "role": "user",
                "content": "Say hello to Joseph using the hello tool.",
            },
        ],
        tools=registry.schemas(),
    )

    print(response)