"""Plotly visualization helpers."""

from __future__ import annotations

from typing import Any

import plotly.graph_objects as go


def build_solver_comparison_chart(rows: list[dict[str, Any]], metric: str = "objective_value") -> go.Figure:
    if not rows:
        return go.Figure()
    methods = [r.get("method_label", r.get("method_id", "")) for r in rows]
    values = [r.get(metric, 0) for r in rows]
    colors = ["#4f46e5" if r.get("winner") else "#94a3b8" for r in rows]
    fig = go.Figure(go.Bar(x=methods, y=values, marker_color=colors))
    fig.update_layout(
        title=f"Method Comparison — {metric.replace('_', ' ').title()}",
        xaxis_title="Method",
        yaxis_title=metric.replace("_", " ").title(),
        template="plotly_white",
        height=400,
    )
    return fig


def build_gap_timeline(rows: list[dict[str, Any]]) -> go.Figure:
    if not rows:
        return go.Figure()
    fig = go.Figure()
    for r in rows:
        fig.add_trace(go.Scatter(
            x=[r.get("elapsed_time_sec", 0)],
            y=[r.get("optimality_gap", 0)],
            mode="markers+text",
            name=r.get("method_label", ""),
            text=[r.get("method_label", "")],
            textposition="top center",
        ))
    fig.update_layout(
        title="Optimality Gap vs Solve Time",
        xaxis_title="Elapsed Time (s)",
        yaxis_title="Gap (%)",
        template="plotly_white",
        height=400,
    )
    return fig


def build_scalability_chart(rows: list[dict[str, Any]]) -> go.Figure:
    if not rows:
        return go.Figure()
    sizes = sorted(set(r.get("size", "") for r in rows))
    methods = sorted(set(r.get("method_id", "") for r in rows))
    fig = go.Figure()
    for mid in methods:
        subset = [r for r in rows if r.get("method_id") == mid]
        by_size = {r["size"]: r.get("elapsed_time_sec", 0) for r in subset}
        fig.add_trace(go.Scatter(
            x=sizes,
            y=[by_size.get(s, 0) for s in sizes],
            mode="lines+markers",
            name=mid,
        ))
    fig.update_layout(
        title="Scalability — Solve Time by Instance Size",
        xaxis_title="Size",
        yaxis_title="Time (s)",
        template="plotly_white",
        height=400,
    )
    return fig


def build_category_radar(rows: list[dict[str, Any]]) -> go.Figure:
    if not rows:
        return go.Figure()
    cats = sorted(set(r.get("method_category", "") for r in rows))
    metrics = ["objective_value", "optimality_gap", "elapsed_time_sec"]
    fig = go.Figure()
    for cat in cats:
        subset = [r for r in rows if r.get("method_category") == cat]
        if not subset:
            continue
        vals = []
        for m in metrics:
            avg = sum(r.get(m, 0) for r in subset) / len(subset)
            vals.append(avg)
        fig.add_trace(go.Scatterpolar(
            r=vals,
            theta=[m.replace("_", " ").title() for m in metrics],
            name=cat,
            fill="toself",
        ))
    fig.update_layout(
        polar=dict(radialaxis=dict(visible=True)),
        title="Method Category Profile",
        template="plotly_white",
        height=450,
    )
    return fig


def build_heatmap(comparisons: dict[str, Any], metric: str = "objective_value") -> go.Figure:
    if not comparisons:
        return go.Figure()
    problems = list(comparisons.keys())
    methods_set: set[str] = set()
    for pt_data in comparisons.values():
        for inst_data in pt_data.values():
            methods_set.update(inst_data.get("results", {}).keys())
    methods = sorted(methods_set)
    z = []
    for pt in problems:
        row = []
        for mid in methods:
            vals = []
            for inst_data in comparisons[pt].values():
                mdata = inst_data.get("results", {}).get(mid, {})
                if mdata:
                    vals.append(mdata.get(metric, 0))
            row.append(sum(vals) / len(vals) if vals else 0)
        z.append(row)
    fig = go.Figure(go.Heatmap(z=z, x=methods, y=problems, colorscale="Viridis"))
    fig.update_layout(
        title=f"Benchmark Heatmap — {metric.replace('_', ' ').title()}",
        template="plotly_white",
        height=500,
    )
    return fig


def build_progress_chart(result_metrics: dict[str, Any]) -> go.Figure:
    fig = go.Figure()
    labels = ["Objective", "Best Bound", "Gap %", "Time (s)", "Iterations"]
    values = [
        result_metrics.get("objective_value", 0),
        result_metrics.get("best_bound", 0),
        result_metrics.get("optimality_gap", 0),
        result_metrics.get("elapsed_time_sec", 0),
        result_metrics.get("iterations", 0),
    ]
    fig.add_trace(go.Bar(x=labels, y=values, marker_color=["#4f46e5", "#7c3aed", "#f59e0b", "#10b981", "#6366f1"]))
    fig.update_layout(title="Solve Progress Snapshot", template="plotly_white", height=350)
    return fig