"""
A file that contains some helpers functions

"""


from typing import IO
import pandas as pd
import plotly.express as px
from plotly.graph_objs._figure import Figure


def load_data(file: IO) -> tuple[str
, str]:
    global df
    df = pd.read_csv(file.name)
    return df.head().to_html(), f"Rows: {df.shape[0]}, Cols: {df.shape[1]}"

def show_summary() -> str:
    if df is None:
        return "Please upload a dataset first."
    return df.describe().to_html()

def plot_column(colname: str) -> Figure | str:
    if df is None:
        return "Please upload a dataset first."
    fig = px.histogram(df, x=colname)
    return fig