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


# 🔥 CUSTOM TOOL 1: Calculator
@tool
def calculator(expression: str) -> str:
    """Evaluates a mathematical expression.
    Args:
        expression: A math expression like '2+3*5'
    """
    try:
        result = eval(expression)
        return f"Result is {result}"
    except Exception as e:
        return f"Error: {str(e)}"


# 🔥 CUSTOM TOOL 2: Time Tool
@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """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: {str(e)}"


# 🔥 CUSTOM TOOL 3: Weather Tool
@tool
def get_weather(city: str) -> str:
    """Fetches current weather for a city.
    Args:
        city: Name of the city
    """
    try:
        url = f"https://wttr.in/{city}?format=3"
        response = requests.get(url)
        return response.text
    except:
        return "Error fetching weather"


# 🔥 FINAL ANSWER TOOL (MANDATORY)
final_answer = FinalAnswerTool()


# 🤖 MODEL (LLM)
model = HfApiModel(
    max_tokens=2048,
    temperature=0.5,
    model_id='Qwen/Qwen2.5-7B-Instruct',  # smaller & stable model
    custom_role_conversions=None,
)


# 🖼️ IMAGE GENERATION TOOL (from Hugging Face Hub)
image_generation_tool = load_tool(
    "agents-course/text-to-image",
    trust_remote_code=True
)


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


# 🧠 CREATE AGENT
agent = CodeAgent(
    model=model,
    tools=[
        final_answer,
        calculator,
        get_current_time_in_timezone,
        get_weather,
        DuckDuckGoSearchTool(),
        image_generation_tool
    ],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name="Smart AI Agent",
    description="An AI agent that can search, calculate, fetch time, weather, and generate images.",
    prompt_templates=prompt_templates
)


# 🖥️ LAUNCH UI
GradioUI(agent).launch()