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


# ─────────────────────────────────────────
# TOOL 1: Get current time in any timezone
# ─────────────────────────────────────────
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)}"


# ─────────────────────────────────────────
# TOOL 2: Get weather for any city (free API)
# ─────────────────────────────────────────
def get_weather(city: str) -> str:
    """Gets the current weather for a given city using wttr.in.
    Args:
        city: The name of the city to get weather for (e.g., 'Bengaluru').
    """
    try:
        url = f"https://wttr.in/{city}?format=3"
        response = requests.get(url, timeout=5)
        return response.text.strip()
    except Exception as e:
        return f"Could not fetch weather for {city}: {str(e)}"


# ─────────────────────────────────────────
# TOOL 3: Simple calculator
# ─────────────────────────────────────────
def calculator(expression: str) -> str:
    """Evaluates a basic math expression and returns the result.
    Args:
        expression: A math expression as a string, e.g. '25 * 4 + 10'.
    """
    try:
        result = eval(expression, {"__builtins__": {}})
        return f"Result of '{expression}' = {result}"
    except Exception as e:
        return f"Could not evaluate '{expression}': {str(e)}"


# ─────────────────────────────────────────
# TOOL 4: Get a fun fact about any number
# ─────────────────────────────────────────
def number_fact(number: int) -> str:
    """Returns an interesting fact about a given number.
    Args:
        number: An integer to get a fun fact about.
    """
    try:
        response = requests.get(f"http://numbersapi.com/{number}", timeout=5)
        return response.text
    except Exception as e:
        return f"Could not fetch fact for {number}: {str(e)}"


# ─────────────────────────────────────────
# AGENT SETUP (don't change this much)
# ─────────────────────────────────────────
final_answer = FinalAnswerTool()

model = InferenceClientModel(
    max_tokens=2096,
    temperature=0.5,
    model_id='Qwen/Qwen2.5-Coder-32B-Instruct',
    custom_role_conversions=None,
)

# Load image generation tool from HF Hub
image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

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

# ← THIS is where you register all your tools
agent = CodeAgent(
    model=model,
    tools=[
        final_answer,
        DuckDuckGoSearchTool(),       # web search
        get_current_time_in_timezone, # time zones
        get_weather,                  # weather
        calculator,                   # math
        number_fact,                  # fun facts
        image_generation_tool,        # generate images
    ],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name=None,
    description=None,
    prompt_templates=prompt_templates
)

GradioUI(agent).launch()