from smolagents import CodeAgent, HfApiModel, load_tool, tool
import datetime
import requests
import pytz
import yaml
import os

from tools.final_answer import FinalAnswerTool
from Gradio_UI import GradioUI


# =========================
# 🌦 WEATHER TOOL
# =========================
@tool
def get_weather(city: str) -> str:
    """
    A tool that fetches the current weather for a given city using OpenWeather API.

    Args:
        city: Name of the city (e.g., 'London', 'Bangalore')
    """
    try:
        api_key = os.getenv("OPENWEATHER_API_KEY")  # safer method

        if not api_key:
            return "OpenWeather API key not found. Please set OPENWEATHER_API_KEY."

        url = (
            f"http://api.openweathermap.org/data/2.5/weather?"
            f"q={city}&appid={api_key}&units=metric"
        )

        response = requests.get(url)
        data = response.json()

        if response.status_code != 200:
            return f"Error fetching weather: {data.get('message', 'Unknown error')}"

        temperature = data["main"]["temp"]
        description = data["weather"][0]["description"]
        humidity = data["main"]["humidity"]
        wind_speed = data["wind"]["speed"]

        return (
            f"Weather in {city}:\n"
            f"Temperature: {temperature}°C\n"
            f"Condition: {description}\n"
            f"Humidity: {humidity}%\n"
            f"Wind Speed: {wind_speed} m/s"
        )

    except Exception as e:
        return f"Error occurred: {str(e)}"


# =========================
# 🕒 TIME TOOL
# =========================
@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 valid timezone (e.g., 'Asia/Kolkata')
    """
    try:
        tz = pytz.timezone(timezone)
        local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
        return f"Current time in {timezone}: {local_time}"
    except Exception as e:
        return f"Error fetching time: {str(e)}"


# =========================
# 🎯 FINAL ANSWER TOOL
# =========================
final_answer = FinalAnswerTool()


# =========================
# 🤖 MODEL SETUP
# =========================
model = HfApiModel(
    max_tokens=2096,
    temperature=0.5,
    model_id="Qwen/Qwen2.5-Coder-32B-Instruct",
    custom_role_conversions=None,
)


# =========================
# 📜 LOAD PROMPTS
# =========================
with open("prompts.yaml", "r") as stream:
    prompt_templates = yaml.safe_load(stream)


# =========================
# 🧠 AGENT SETUP
# =========================
agent = CodeAgent(
    model=model,
    tools=[
        get_weather,
        get_current_time_in_timezone,
        final_answer
    ],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name="smart_assistant_agent",
    description="An AI agent that can fetch weather and time information.",
    prompt_templates=prompt_templates,
)


# =========================
# 🚀 LAUNCH UI
# =========================
GradioUI(agent).launch()