import datetime
import requests
import pytz
import yaml
import spaces
from smolagents import CodeAgent, DuckDuckGoSearchTool, HfApiModel, load_tool, tool
from tools.final_answer import FinalAnswerTool
from Gradio_UI import GradioUI

# Instantiate pre-made search tool
web_search_tool = DuckDuckGoSearchTool()


# Custom Tool 1: Timezone Checker
@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """A tool that fetches the current local time in a specified timezone.
    Args:
        timezone: A string representing a valid timezone (e.g., 'America/New_York').
    """
    try:
        tz = pytz.timezone(timezone)
        local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
        return f"The current local time in {timezone} is: {local_time}"
    except Exception as e:
        return f"Error fetching time for timezone '{timezone}': {str(e)}"

# Custom Tool 2: Weather Checker
@tool
def get_weather(city: str) -> str:
    """A tool that fetches the current weather temperature for a given city.
    Args:
        city: The name of the city to get weather for (e.g., 'Cairo').
    """
    try:
        url = f"https://wttr.in/{city}?format=%C+%t"
        response = requests.get(url, timeout=5)
        if response.status_code == 200:
            return f"The current weather in {city} is {response.text.strip()}."
        return f"Could not retrieve weather for {city}."
    except Exception as e:
        return f"Error fetching weather: {str(e)}"
        

# Import tool from Hub
_raw_image_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

# Wrap GPU-intensive tool execution with ZeroGPU decorator
@tool
@spaces.GPU
def generate_image(prompt: str) -> str:
    """A tool that generates an image from a text prompt on GPU.
    Args:
        prompt: The text description of the image to generate.
    """
    return _raw_image_tool(prompt)

final_answer = FinalAnswerTool()

# If the agent does not answer, the model is overloaded, please use another model or the following Hugging Face Endpoint that also contains qwen2.5 coder:
# model_id='https://pflgm2locj2t89co.us-east-1.aws.endpoints.huggingface.cloud' 

model = HfApiModel(
    max_tokens=2096,
    temperature=0.5,
    model_id='Qwen/Qwen2.5-Coder-32B-Instruct', # it is possible that this model may be overloaded
    custom_role_conversions=None,
)

with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)

agent = CodeAgent(
    model=model,
    tools=[final_answer, 
           generate_image,
            web_search_tool, 
            get_current_time_in_timezone, 
            get_weather], ## add your tools here (don't remove final answer)
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name="CourseAgent",
    description="An agent capable of searching the web, generating images, checking local times, and getting weather updates.",
    prompt_templates=prompt_templates
)

GradioUI(agent).launch()