import os
import datetime
import requests
import pytz
import yaml
from dotenv import load_dotenv
from smolagents import CodeAgent, HfApiModel, load_tool, tool
from tools.final_answer import FinalAnswerTool
from Gradio_UI import GradioUI

# Load environment variables from .env
load_dotenv()

@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """
    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)}"

@tool
def get_realtime_weather(location: str) -> str:
    """
    Fetches current weather for a given location.
    Args:
        location: City name (and optional country code), e.g. "Montreal,CA" or "Paris,FR".
    Returns:
        A human-readable summary of temperature, conditions, humidity, etc.
    """
    api_key = os.getenv("OPENWEATHER_API_KEY")
    if not api_key:
        return "Error: OPENWEATHER_API_KEY not set in environment."

    params = {
        "q": location,
        "appid": api_key,
        "units": "metric",  # use "imperial" for °F
        "lang": "en"
    }

    try:
        resp = requests.get("https://api.openweathermap.org/data/2.5/weather", params=params)
        resp.raise_for_status()
        data = resp.json()

        weather = data["weather"][0]["description"].capitalize()
        temp = data["main"]["temp"]
        feels = data["main"]["feels_like"]
        humidity = data["main"]["humidity"]
        wind = data["wind"]["speed"]

        return (
            f"Weather in {data['name']}: {weather}. "
            f"🌡️ Temp: {temp}°C (feels like {feels}°C), "
            f"💧 Humidity: {humidity}%, "
            f"💨 Wind: {wind} m/s."
        )
    except requests.HTTPError as e:
        return f"HTTP error fetching weather for '{location}': {e}"
    except Exception as e:
        return f"Error fetching weather for '{location}': {e}"

# Final answer tool
final_answer = FinalAnswerTool()

# Load other tools
image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

# Load prompt templates
with open("prompts.yaml", "r") as stream:
    prompt_templates = yaml.safe_load(stream)

# Model setup
model = HfApiModel(
    max_tokens=2096,
    temperature=0.5,
    model_id="Qwen/Qwen2.5-Coder-32B-Instruct",
)

# Agent configuration
agent = CodeAgent(
    model=model,
    tools=[
        final_answer,
        get_current_time_in_timezone,
        get_realtime_weather,
        image_generation_tool,
    ],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name=None,
    description=None,
    prompt_templates=prompt_templates
)

# Launch the Gradio UI
GradioUI(agent).launch()