import httpx
import json
import os
import random
from typing import AsyncGenerator, Optional, List, Any
from ai_client import AIClient
from dotenv import load_dotenv

load_dotenv()

class GitHubClient(AIClient):
    def __init__(self):
        self.api_keys = []
        # Support GITHUB_API_KEY, GITHUB_API_KEY2, etc.
        for key in ["GITHUB_API_KEY", "GITHUB_API_KEY2", "GITHUB_TOKEN_GROK", "GITHUB_TOKEN_PROMPT"]:
            val = os.getenv(key)
            if val:
                self.api_keys.append(val.strip())
        
        self.client = httpx.AsyncClient(timeout=60.0)

    def _get_api_key(self) -> str:
        if not self.api_keys:
            return ""
        return random.choice(self.api_keys)

    async def async_stream_request(
        self, 
        model_id: str, 
        prompt: str, 
        system_prompt: Optional[str] = None,
        **kwargs: Any
    ) -> AsyncGenerator[str, None]:
        api_key = self._get_api_key()
        headers = {
            "Authorization": f"Bearer {api_key}",
            "Content-Type": "application/json"
        }
        
        # GitHub Models API is OpenAI-compatible
        messages = []
        if system_prompt:
            messages.append({"role": "system", "content": system_prompt})
        messages.append({"role": "user", "content": prompt})

        # Base URL for GitHub Models
        url = "https://models.inference.ai.azure.com/chat/completions"
        
        payload = {
            "model": model_id,
            "messages": messages,
            "stream": True,
            "temperature": kwargs.get("temperature", 1.0),
            "top_p": 1.0,
            "max_tokens": kwargs.get("max_tokens", 1000)
        }

        try:
            async with self.client.stream("POST", url, headers=headers, json=payload) as response:
                if response.status_code != 200:
                    err_text = await response.aread()
                    yield f"Error from GitHub ({response.status_code}): {err_text.decode()}"
                    return

                async for line in response.aiter_lines():
                    if line.startswith("data: "):
                        data_str = line[6:].strip()
                        if data_str == "[DONE]":
                            break
                        try:
                            data = json.loads(data_str)
                            content = data.get("choices", [{}])[0].get("delta", {}).get("content", "")
                            if content:
                                yield content
                        except Exception:
                            continue
        except Exception as e:
            yield f"Connection error: {str(e)}"

    async def close(self) -> None:
        await self.client.aclose()