from smolagents import CodeAgent, tool, load_tool
import datetime
import requests
import pytz
import yaml
import io
import base64
import schemdraw
from schemdraw import flow
from tools.final_answer import FinalAnswerTool
from Gradio_UI import GradioUI

@tool
def text_to_flowchart(steps_text: str) -> str:
    """
    Generates a flowchart diagram from pre-processed text that lists sequential process steps.
    The input should be a text with each step on a new line (optionally prefixed by bullet markers).
    
    Args:
        steps_text: A string containing the process steps.
    
    Returns:
        A data URL for a PNG image of the generated flowchart.
    """
    # Parse steps from the input text
    parsed_steps = []
    for line in steps_text.splitlines():
        line = line.strip()
        if line.startswith(("-", "*", "•")):
            line = line[1:].strip()
        elif line and line[0].isdigit():
            dot_index = line.find('.')
            if dot_index != -1:
                line = line[dot_index+1:].strip()
        if line:
            parsed_steps.append(line)
    if not parsed_steps:
        parsed_steps = ["No steps provided."]
    
    # Create the flowchart using SchemDraw's flow module
    d = schemdraw.Drawing(unit=0.5, fontsize=10)
    d += flow.Terminal().label("Start")
    for step in parsed_steps:
        d += flow.Arrow()
        d += flow.Process().label(step)
    d += flow.Arrow()
    d += flow.Terminal().label("End")
    
    # Render diagram to PNG and encode as a data URL
    buf = io.BytesIO()
    d.draw()
    d.fig.savefig(buf, format='png', bbox_inches='tight')
    buf.seek(0)
    encoded_image = base64.b64encode(buf.getvalue()).decode('utf-8')
    data_url = f"data:image/png;base64,{encoded_image}"
    
    return data_url

@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """
    Fetches the current local time for a specified timezone.
    
    Args:
        timezone: A valid timezone string (e.g., 'America/New_York').
    
    Returns:
        A string with the current local time or an error message.
    """
    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)}"

final_answer = FinalAnswerTool()

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

with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)
    
agent = CodeAgent(
    model=model,
    tools=[text_to_flowchart, final_answer],
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name="Flowchart Generator",
    description="Generates a flowchart diagram from sequential steps using SchemDraw's flow module.",
    prompt_templates=prompt_templates
)

GradioUI(agent).launch()