import pandas as pd
import plotly.express as px

def histogram_tool(file_path: str, column: str):
    df = pd.read_csv(file_path)
    fig = px.histogram(df, x=column, nbins=30, title=f"Histogram – {column}", template="plotly_dark")
    return fig

def scatter_matrix_tool(file_path: str, cols: list[str]):
    df = pd.read_csv(file_path)
    fig = px.scatter_matrix(df[cols], title="Scatter‑Matrix", template="plotly_dark")
    return fig

def corr_heatmap_tool(file_path: str):
    df = pd.read_csv(file_path).select_dtypes("number")
    corr = df.corr(numeric_only=True)
    fig = px.imshow(
        corr,
        color_continuous_scale="RdBu",
        title="Correlation Heat‑map",
        aspect="auto",
        labels=dict(color="ρ"),
        template="plotly_dark",
    )
    return fig