"""Plotting functions for Voice Branding analysis."""

import plotly.graph_objects as go
import polars as pl


def plot_average_scores_with_counts(
    df: pl.DataFrame,
    title: str = "General Impression (1-10)<br>Per Voice with Number of Participants Who Rated It",
    x_label: str = "Stimuli",
    y_label: str = "Average General Impression Rating (1-10)",
    color: str = "#0077B6",
    height: int = 500,
    width: int = 1000,
) -> go.Figure:
    """
    Create a bar plot showing average scores and count of non-null values for each column.

    Parameters
    ----------
    df : pl.DataFrame
        DataFrame containing numeric columns to analyze.
    title : str, optional
        Plot title.
    x_label : str, optional
        X-axis label.
    y_label : str, optional
        Y-axis label.
    color : str, optional
        Bar color (hex code or named color).
    height : int, optional
        Plot height in pixels.
    width : int, optional
        Plot width in pixels.

    Returns
    -------
    go.Figure
        Plotly figure object.
    """
    # Calculate average and count of non-null values for each column
    stats = []
    for col in df.columns:
        avg_score = df[col].mean()
        non_null_count = df[col].drop_nulls().len()
        stats.append({
            'column': col,
            'average': avg_score,
            'count': non_null_count
        })

    # Sort by average score in descending order
    stats_df = pl.DataFrame(stats).sort('average', descending=True)

    # Extract voice identifiers from column names (e.g., "V14" from "Voice_Scale_1_10__V14")
    labels = [col.split('__')[-1] if '__' in col else col for col in stats_df['column']]

    # Create the plot
    fig = go.Figure()

    fig.add_trace(go.Bar(
        x=labels,
        y=stats_df['average'],
        text=stats_df['count'],
        textposition='inside',
        textfont=dict(size=10, color='black'),
        marker_color=color,
        hovertemplate='<b>%{x}</b><br>Average: %{y:.2f}<br>Count: %{text}<extra></extra>'
    ))

    fig.update_layout(
        title=title,
        xaxis_title=x_label,
        yaxis_title=y_label,
        height=height,
        width=width,
        plot_bgcolor='white',
        xaxis=dict(
            showgrid=True,
            gridcolor='lightgray',
            tickangle=-45
        ),
        yaxis=dict(
            range=[0, 10],
            showgrid=True,
            gridcolor='lightgray'
        ),
        font=dict(size=11)
    )

    return fig


def plot_top3_ranking_distribution(
    df: pl.DataFrame,
    title: str = "Top 3 Rankings Distribution<br>Count of 1st, 2nd, and 3rd Place Votes per Voice",
    x_label: str = "Voices",
    y_label: str = "Number of Mentions in Top 3",
    height: int = 600,
    width: int = 1000,
) -> go.Figure:
    """
    Create a stacked bar chart showing how often each voice was ranked 1st, 2nd, or 3rd.

    The total height of the bar represents the popularity (frequency of being in Top 3),
    while the segments show the quality of those rankings.

    Parameters
    ----------
    df : pl.DataFrame
        DataFrame containing ranking columns (values 1, 2, 3).
    title : str, optional
        Plot title.
    x_label : str, optional
        X-axis label.
    y_label : str, optional
        Y-axis label.
    height : int, optional
        Plot height in pixels.
    width : int, optional
        Plot width in pixels.

    Returns
    -------
    go.Figure
        Plotly figure object.
    """
    stats = []
    for col in df.columns:
        # Count occurrences of each rank (1, 2, 3)
        # We ensure we're just counting the specific integer values
        rank1 = df.filter(pl.col(col) == 1).height
        rank2 = df.filter(pl.col(col) == 2).height
        rank3 = df.filter(pl.col(col) == 3).height
        total = rank1 + rank2 + rank3

        # Only include if it received at least one vote (optional, but keeps chart clean)
        if total > 0:
            stats.append({
                'column': col,
                'Rank 1': rank1,
                'Rank 2': rank2,
                'Rank 3': rank3,
                'Total': total
            })

    # Sort by Total count descending (Most popular overall)
    # Tie-break with Rank 1 count
    stats_df = pl.DataFrame(stats).sort(['Total', 'Rank 1'], descending=[True, True])

    # Extract voice identifiers from column names
    labels = [col.split('__')[-1] if '__' in col else col for col in stats_df['column']]

    fig = go.Figure()

    # Add traces for Rank 1, 2, and 3.
    # Stack order: Rank 1 at bottom (Base) -> Rank 2 -> Rank 3
    # This makes it easy to compare the "First Choice" volume across bars.

    fig.add_trace(go.Bar(
        name='Rank 1 (1st Choice)',
        x=labels,
        y=stats_df['Rank 1'],
        marker_color='#004C6D',  # Dark Blue
        hovertemplate='<b>%{x}</b><br>Rank 1: %{y}<extra></extra>'
    ))

    fig.add_trace(go.Bar(
        name='Rank 2 (2nd Choice)',
        x=labels,
        y=stats_df['Rank 2'],
        marker_color='#008493',  # Teal
        hovertemplate='<b>%{x}</b><br>Rank 2: %{y}<extra></extra>'
    ))

    fig.add_trace(go.Bar(
        name='Rank 3 (3rd Choice)',
        x=labels,
        y=stats_df['Rank 3'],
        marker_color='#5AAE95',  # Sea Green
        hovertemplate='<b>%{x}</b><br>Rank 3: %{y}<extra></extra>'
    ))

    fig.update_layout(
        barmode='stack',
        title=title,
        xaxis_title=x_label,
        yaxis_title=y_label,
        height=height,
        width=width,
        plot_bgcolor='white',
        xaxis=dict(
            showgrid=True,
            gridcolor='lightgray',
            tickangle=-45
        ),
        yaxis=dict(
            showgrid=True,
            gridcolor='lightgray'
        ),
        legend=dict(
            orientation="h",
            yanchor="bottom",
            y=1.02,
            xanchor="right",
            x=1,
            traceorder="normal"
        ),
        font=dict(size=11)
    )

    return fig