app.py

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 Tools
@tool
def convert_time_between_timezones(
    time_str: str,
    from_tz: str,
    to_tz: str,
    time_format: str = "%Y-%m-%d %H:%M:%S"
) -> str:
    """Converts a time between two timezones, handling DST automatically.
    Args:
        time_str: The time string to convert (e.g., '2023-12-25 16:00:00')
        from_tz: Source timezone (e.g., 'Europe/Madrid', 'UTC+2', 'America/Mexico_City')
        to_tz: Target timezone (e.g., 'America/Sao_Paulo', 'UTC-3')
        time_format: Format of input/output time strings
    """
    try:
        # Handle UTC offsets (like 'UTC+2')
        if from_tz.startswith('UTC'):
            from_tz = f'Etc/GMT{-int(from_tz[3:])}' if '+' in from_tz else f'Etc/GMT{+int(from_tz[3:])}'
        if to_tz.startswith('UTC'):
            to_tz = f'Etc/GMT{-int(to_tz[3:])}' if '+' in to_tz else f'Etc/GMT{+int(to_tz[3:])}'

        # Get timezone objects
        from_zone = pytz.timezone(from_tz)
        to_zone = pytz.timezone(to_tz)
        
        # Parse time (naive) and localize to source timezone
        naive_time = datetime.datetime.strptime(time_str, time_format)
        localized_time = from_zone.localize(naive_time)
        
        # Convert to target timezone
        converted_time = localized_time.astimezone(to_zone)
        
        # Get current UTC offsets to show the difference
        from_offset = localized_time.strftime('%z')
        to_offset = converted_time.strftime('%z')
        
        return (f"{localized_time.strftime(time_format)} {from_tz} ({from_offset}) "
                f"is {converted_time.strftime(time_format)} {to_tz} ({to_offset})")
    
    except pytz.UnknownTimeZoneError as e:
        common_tz = {
            'Spain': 'Europe/Madrid',
            'São Paulo': 'America/Sao_Paulo',
            'SP': 'America/Sao_Paulo',
            'Paulo, Mexico': 'America/Mexico_City',
            'CEST': 'Europe/Madrid',  # Central European Summer Time
            'CET': 'Europe/Paris',    # Central European Time
            'BRT': 'America/Sao_Paulo'
        }
        if e.args[0] in common_tz:
            return f"Note: Using '{common_tz[e.args[0]]}' for '{e.args[0]}'.\n" + \
                   convert_time_between_timezones(time_str, common_tz[e.args[0]], to_tz, time_format)
        return f"Error: Unknown timezone - {str(e)}. Common timezones: Europe/Madrid, America/Sao_Paulo, etc."
    except Exception as e:
        return f"Error converting time: {str(e)}"

@tool
def weather_lookup(city: str) -> str:
    """Fetches current weather conditions for a specified city.
    Args:
        city: The city name to get weather for (e.g., 'Paris, France')
    """
    try:
        response = requests.get(f"https://wttr.in/{city}?format=%C+%t")
        return f"Weather in {city}: {response.text}"
    except Exception as e:
        return f"Error fetching weather: {str(e)}"

@tool
def unit_converter(value: float, from_unit: str, to_unit: str) -> str:
    """Converts between different units (length, weight, temperature).
    Args:
        value: The numerical value to convert
        from_unit: The unit to convert from (e.g., 'miles')
        to_unit: The unit to convert to (e.g., 'kilometers')
    """
    # Simplified conversion examples
    conversions = {
        ('miles', 'kilometers'): lambda x: x * 1.60934,
        ('fahrenheit', 'celsius'): lambda x: (x - 32) * 5/9,
        ('pounds', 'kilograms'): lambda x: x * 0.453592
    }
    try:
        if (from_unit, to_unit) in conversions:
            result = conversions[(from_unit, to_unit)](value)
            return f"{value} {from_unit} = {result:.2f} {to_unit}"
        return f"Conversion from {from_unit} to {to_unit} not supported"
    except Exception as e:
        return f"Conversion error: {str(e)}"

# Initialize tools
final_answer = FinalAnswerTool()
duckduckgo_search = DuckDuckGoSearchTool()
image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

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

# Load system prompt
with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)
    
# Create agent with all tools
agent = CodeAgent(
    model=model,
    tools=[final_answer, duckduckgo_search, image_generation_tool, convert_time_between_timezones],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name=None,
    description=None,
    prompt_templates=prompt_templates
)

# Launch the interface
GradioUI(agent).launch()