#!/usr/bin/env python3
"""
Visualize B-cell experiment results: Adaptive Prompt Selection vs Stack Baseline.

Reads cell-eval CSV outputs and generates comparison charts.

Usage:
    python code/adaptive_prompt_selection/visualize_results.py \
        --results-dir data/bcell_test_results \
        --output-dir data/bcell_test_results/figures
"""

import argparse
from pathlib import Path

import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
import matplotlib.ticker as mticker
import numpy as np
import pandas as pd


# ---------------------------------------------------------------------------
# Metric metadata
# ---------------------------------------------------------------------------

# Higher is better for these metrics; lower is better for the rest
HIGHER_IS_BETTER = {
    "overlap_at_N", "overlap_at_50", "overlap_at_100", "overlap_at_200", "overlap_at_500",
    "precision_at_N", "precision_at_50", "precision_at_100", "precision_at_200", "precision_at_500",
    "de_spearman_sig", "de_direction_match", "de_spearman_lfc_sig", "de_sig_genes_recall",
    "pr_auc", "roc_auc", "pearson_delta",
    "discrimination_score_l1", "discrimination_score_l2", "discrimination_score_cosine",
}
LOWER_IS_BETTER = {"mse", "mae", "mse_delta", "mae_delta"}

# Metrics to skip in visualizations (uninformative or broken)
SKIP_METRICS = {
    "de_nsig_counts_real", "de_nsig_counts_pred",
    "pearson_edistance",  # both -1
    "de_spearman_sig",    # both -1
}

# Group metrics for multi-panel display
METRIC_GROUPS = {
    "DE Gene Overlap": ["overlap_at_50", "overlap_at_100", "overlap_at_200", "overlap_at_500", "overlap_at_N"],
    "DE Precision": ["precision_at_50", "precision_at_100", "precision_at_200", "precision_at_500", "precision_at_N"],
    "DE Quality": ["de_direction_match", "de_spearman_lfc_sig", "de_sig_genes_recall"],
    "Classification": ["pr_auc", "roc_auc"],
    "Expression Error": ["pearson_delta", "mse", "mae", "mse_delta", "mae_delta"],
    "Discrimination": ["discrimination_score_l1", "discrimination_score_l2", "discrimination_score_cosine"],
}

NICE_NAMES = {
    "overlap_at_N": "Overlap@N",
    "overlap_at_50": "Overlap@50",
    "overlap_at_100": "Overlap@100",
    "overlap_at_200": "Overlap@200",
    "overlap_at_500": "Overlap@500",
    "precision_at_N": "Precision@N",
    "precision_at_50": "Precision@50",
    "precision_at_100": "Precision@100",
    "precision_at_200": "Precision@200",
    "precision_at_500": "Precision@500",
    "de_direction_match": "DE Direction Match",
    "de_spearman_lfc_sig": "DE Spearman LFC (sig)",
    "de_sig_genes_recall": "DE Sig Genes Recall",
    "pr_auc": "PR-AUC",
    "roc_auc": "ROC-AUC",
    "pearson_delta": "Pearson (delta)",
    "mse": "MSE",
    "mae": "MAE",
    "mse_delta": "MSE (delta)",
    "mae_delta": "MAE (delta)",
    "discrimination_score_l1": "Discrim L1",
    "discrimination_score_l2": "Discrim L2",
    "discrimination_score_cosine": "Discrim Cosine",
}


def load_per_pert_results(results_dir: Path):
    """Load per-perturbation results for both methods."""
    ada = pd.read_csv(results_dir / "celleval_adaptive" / "results.csv")
    bas = pd.read_csv(results_dir / "celleval_baseline" / "results.csv")
    return ada, bas


def load_comparison(results_dir: Path):
    """Load the mean comparison CSV."""
    return pd.read_csv(results_dir / "comparison_mean.csv")


# ---------------------------------------------------------------------------
# Figure 1: Per-drug side-by-side bars (key metrics only)
# ---------------------------------------------------------------------------

def plot_per_drug_bars(ada_df, bas_df, output_dir: Path, drug: str):
    """Side-by-side bar chart for a single drug across key metrics."""
    ada_row = ada_df[ada_df["perturbation"] == drug].iloc[0]
    bas_row = bas_df[bas_df["perturbation"] == drug].iloc[0]

    key_metrics = [
        "pearson_delta", "mse", "mae",
        "de_direction_match", "de_spearman_lfc_sig", "de_sig_genes_recall",
        "overlap_at_N", "pr_auc", "roc_auc",
    ]
    # Filter out metrics with identical perfect or broken values
    filtered = []
    for m in key_metrics:
        a, b = ada_row[m], bas_row[m]
        if abs(a) > 1e-10 or abs(b) > 1e-10:  # skip all-zero
            if a != -1.0 and b != -1.0:  # skip broken
                filtered.append(m)
    metrics = filtered

    ada_vals = [ada_row[m] for m in metrics]
    bas_vals = [bas_row[m] for m in metrics]
    labels = [NICE_NAMES.get(m, m) for m in metrics]

    x = np.arange(len(metrics))
    width = 0.35

    fig, ax = plt.subplots(figsize=(12, 5))
    bars_a = ax.bar(x - width / 2, ada_vals, width, label="Adaptive", color="#2196F3", alpha=0.85)
    bars_b = ax.bar(x + width / 2, bas_vals, width, label="Baseline (Random)", color="#FF9800", alpha=0.85)

    ax.set_ylabel("Metric Value")
    ax.set_title(f"Adaptive vs Baseline — {drug}", fontsize=14, fontweight="bold")
    ax.set_xticks(x)
    ax.set_xticklabels(labels, rotation=35, ha="right", fontsize=9)
    ax.legend(fontsize=11)
    ax.grid(axis="y", alpha=0.3)

    # Annotate differences
    for i, m in enumerate(metrics):
        a, b = ada_vals[i], bas_vals[i]
        diff = a - b
        if m in LOWER_IS_BETTER:
            better = "A" if diff < 0 else "B"
        else:
            better = "A" if diff > 0 else "B"
        color = "#2196F3" if better == "A" else "#FF9800"
        sign = "+" if diff > 0 else ""
        ax.annotate(f"{sign}{diff:.4f}", xy=(x[i], max(a, b)),
                    fontsize=7, ha="center", va="bottom", color=color, fontweight="bold")

    fig.tight_layout()
    fig.savefig(output_dir / f"per_drug_{drug.replace(' ', '_')}.png", dpi=150)
    plt.close(fig)
    print(f"  Saved per_drug_{drug.replace(' ', '_')}.png")


# ---------------------------------------------------------------------------
# Figure 2: Radar / Spider chart for key metrics
# ---------------------------------------------------------------------------

def plot_radar(ada_row, bas_row, output_dir: Path, drug: str):
    """Radar chart comparing the two methods on a single drug."""
    metrics = [
        "pearson_delta", "de_direction_match", "de_spearman_lfc_sig",
        "de_sig_genes_recall", "overlap_at_N", "pr_auc", "roc_auc",
    ]
    # Filter broken
    metrics = [m for m in metrics if ada_row[m] != -1.0 and bas_row[m] != -1.0]
    if len(metrics) < 3:
        return

    labels = [NICE_NAMES.get(m, m) for m in metrics]
    ada_vals = [ada_row[m] for m in metrics]
    bas_vals = [bas_row[m] for m in metrics]

    angles = np.linspace(0, 2 * np.pi, len(metrics), endpoint=False).tolist()
    ada_vals_c = ada_vals + [ada_vals[0]]
    bas_vals_c = bas_vals + [bas_vals[0]]
    angles_c = angles + [angles[0]]

    fig, ax = plt.subplots(figsize=(7, 7), subplot_kw=dict(polar=True))
    ax.plot(angles_c, ada_vals_c, "o-", linewidth=2, label="Adaptive", color="#2196F3")
    ax.fill(angles_c, ada_vals_c, alpha=0.15, color="#2196F3")
    ax.plot(angles_c, bas_vals_c, "s-", linewidth=2, label="Baseline", color="#FF9800")
    ax.fill(angles_c, bas_vals_c, alpha=0.15, color="#FF9800")

    ax.set_thetagrids(np.degrees(angles), labels, fontsize=9)
    ax.set_title(f"Adaptive vs Baseline — {drug}", fontsize=13, fontweight="bold", pad=20)
    ax.legend(loc="upper right", bbox_to_anchor=(1.3, 1.1), fontsize=10)
    ax.set_ylim(0, 1.05)

    fig.tight_layout()
    fig.savefig(output_dir / f"radar_{drug.replace(' ', '_')}.png", dpi=150)
    plt.close(fig)
    print(f"  Saved radar_{drug.replace(' ', '_')}.png")


# ---------------------------------------------------------------------------
# Figure 3: Grouped bar chart for all metric groups (mean comparison)
# ---------------------------------------------------------------------------

def plot_grouped_comparison(comparison_df, output_dir: Path):
    """Multi-panel grouped bar chart from the mean comparison."""
    # Filter out skip metrics and trivial ones
    comp = comparison_df[~comparison_df["metric"].isin(SKIP_METRICS)].copy()
    # Remove metrics where both are exactly equal (e.g. discrimination=1.0)
    comp = comp[comp["diff"].abs() > 1e-12]

    if comp.empty:
        print("  No non-trivial metric differences to plot.")
        return

    metrics = comp["metric"].tolist()
    ada_vals = comp["adaptive"].tolist()
    bas_vals = comp["baseline"].tolist()
    diffs = comp["diff"].tolist()
    labels = [NICE_NAMES.get(m, m) for m in metrics]

    x = np.arange(len(metrics))
    width = 0.35

    fig, (ax1, ax2) = plt.subplots(2, 1, figsize=(14, 8), gridspec_kw={"height_ratios": [3, 1]})

    # Top: absolute values
    ax1.bar(x - width / 2, ada_vals, width, label="Adaptive", color="#2196F3", alpha=0.85)
    ax1.bar(x + width / 2, bas_vals, width, label="Baseline", color="#FF9800", alpha=0.85)
    ax1.set_ylabel("Metric Value (mean across perturbations)")
    ax1.set_title("Adaptive Prompt Selection vs Random Baseline — Mean Comparison", fontsize=13, fontweight="bold")
    ax1.set_xticks(x)
    ax1.set_xticklabels(labels, rotation=40, ha="right", fontsize=8)
    ax1.legend(fontsize=10)
    ax1.grid(axis="y", alpha=0.3)

    # Bottom: difference (adaptive - baseline)
    colors = []
    for m, d in zip(metrics, diffs):
        if m in LOWER_IS_BETTER:
            colors.append("#2196F3" if d < 0 else "#FF9800")  # lower = adaptive wins
        else:
            colors.append("#2196F3" if d > 0 else "#FF9800")  # higher = adaptive wins
    ax2.bar(x, diffs, 0.5, color=colors, alpha=0.85)
    ax2.axhline(0, color="black", linewidth=0.8)
    ax2.set_ylabel("Diff (Adaptive - Baseline)")
    ax2.set_xticks(x)
    ax2.set_xticklabels(labels, rotation=40, ha="right", fontsize=8)
    ax2.grid(axis="y", alpha=0.3)

    # Color legend for diff chart
    from matplotlib.patches import Patch
    legend_elements = [
        Patch(facecolor="#2196F3", alpha=0.85, label="Adaptive wins"),
        Patch(facecolor="#FF9800", alpha=0.85, label="Baseline wins"),
    ]
    ax2.legend(handles=legend_elements, fontsize=9, loc="upper right")

    fig.tight_layout()
    fig.savefig(output_dir / "comparison_mean_bars.png", dpi=150)
    plt.close(fig)
    print("  Saved comparison_mean_bars.png")


# ---------------------------------------------------------------------------
# Figure 4: Dabrafenib-focused detailed comparison
# ---------------------------------------------------------------------------

def plot_dabrafenib_detail(ada_df, bas_df, output_dir: Path):
    """Detailed comparison for Dabrafenib only (the real test drug)."""
    if "Dabrafenib" not in ada_df["perturbation"].values:
        print("  No Dabrafenib data found, skipping detail plot.")
        return

    ada = ada_df[ada_df["perturbation"] == "Dabrafenib"].iloc[0]
    bas = bas_df[bas_df["perturbation"] == "Dabrafenib"].iloc[0]

    # All informative metrics
    all_metrics = []
    for group_name, group_metrics in METRIC_GROUPS.items():
        for m in group_metrics:
            if m in SKIP_METRICS:
                continue
            a, b = ada.get(m, None), bas.get(m, None)
            if a is None or b is None:
                continue
            if a == -1.0 and b == -1.0:
                continue
            all_metrics.append((group_name, m, a, b))

    if not all_metrics:
        return

    fig, ax = plt.subplots(figsize=(10, max(6, len(all_metrics) * 0.4)))

    y_pos = np.arange(len(all_metrics))
    labels = []
    ada_vals = []
    bas_vals = []
    win_colors = []

    for group, m, a, b in all_metrics:
        labels.append(f"[{group}] {NICE_NAMES.get(m, m)}")
        ada_vals.append(a)
        bas_vals.append(b)
        diff = a - b
        if m in LOWER_IS_BETTER:
            win_colors.append("#2196F3" if diff < 0 else "#FF9800")
        else:
            win_colors.append("#2196F3" if diff > 0 else "#FF9800")

    # Horizontal bar chart: show absolute values
    h = 0.35
    ax.barh(y_pos - h / 2, ada_vals, h, label="Adaptive", color="#2196F3", alpha=0.8)
    ax.barh(y_pos + h / 2, bas_vals, h, label="Baseline", color="#FF9800", alpha=0.8)

    ax.set_yticks(y_pos)
    ax.set_yticklabels(labels, fontsize=8)
    ax.invert_yaxis()
    ax.set_xlabel("Metric Value")
    ax.set_title("Dabrafenib — Detailed Metric Comparison", fontsize=13, fontweight="bold")
    ax.legend(fontsize=10, loc="lower right")
    ax.grid(axis="x", alpha=0.3)

    # Annotate diffs on the right
    for i, (_, m, a, b) in enumerate(all_metrics):
        diff = a - b
        sign = "+" if diff > 0 else ""
        ax.annotate(f"{sign}{diff:.4f}", xy=(max(a, b) + 0.01, y_pos[i]),
                    fontsize=7, va="center", color=win_colors[i], fontweight="bold")

    fig.tight_layout()
    fig.savefig(output_dir / "dabrafenib_detail.png", dpi=150)
    plt.close(fig)
    print("  Saved dabrafenib_detail.png")


# ---------------------------------------------------------------------------
# Summary table
# ---------------------------------------------------------------------------

def print_summary_table(ada_df, bas_df):
    """Print a text summary of per-drug results."""
    drugs = sorted(set(ada_df["perturbation"]) & set(bas_df["perturbation"]))

    key_metrics = [
        ("pearson_delta", True),   # higher is better
        ("mse", False),            # lower is better
        ("mae", False),
        ("de_direction_match", True),
        ("de_spearman_lfc_sig", True),
        ("de_sig_genes_recall", True),
        ("overlap_at_N", True),
        ("pr_auc", True),
        ("roc_auc", True),
    ]

    print("\n" + "=" * 80)
    print("EXPERIMENT RESULTS SUMMARY")
    print("=" * 80)

    for drug in drugs:
        ada = ada_df[ada_df["perturbation"] == drug].iloc[0]
        bas = bas_df[bas_df["perturbation"] == drug].iloc[0]

        print(f"\n--- {drug} ---")
        print(f"{'Metric':<25} {'Adaptive':>12} {'Baseline':>12} {'Diff':>12} {'Winner':>10}")
        print("-" * 75)

        a_wins = 0
        b_wins = 0
        for m, higher_better in key_metrics:
            a_val, b_val = ada[m], bas[m]
            if a_val == -1.0 and b_val == -1.0:
                continue
            diff = a_val - b_val
            if higher_better:
                winner = "Adaptive" if diff > 0 else "Baseline" if diff < 0 else "Tie"
            else:
                winner = "Adaptive" if diff < 0 else "Baseline" if diff > 0 else "Tie"

            if winner == "Adaptive":
                a_wins += 1
            elif winner == "Baseline":
                b_wins += 1

            sign = "+" if diff > 0 else ""
            print(f"{NICE_NAMES.get(m, m):<25} {a_val:>12.6f} {b_val:>12.6f} {sign}{diff:>11.6f} {winner:>10}")

        print(f"\n  Score: Adaptive {a_wins} — Baseline {b_wins}")

    # Overall summary across non-trivial drugs
    nontrivial_drugs = []
    for drug in drugs:
        ada = ada_df[ada_df["perturbation"] == drug].iloc[0]
        # Skip drugs where pearson_delta ≈ 1.0 (trivial)
        if ada.get("pearson_delta", 0) < 0.999:
            nontrivial_drugs.append(drug)

    if nontrivial_drugs:
        print("\n" + "=" * 80)
        print(f"NON-TRIVIAL DRUGS ({len(nontrivial_drugs)}): {nontrivial_drugs}")
        print("=" * 80)
        for m, higher_better in key_metrics:
            a_mean = np.mean([ada_df[ada_df["perturbation"] == d].iloc[0][m] for d in nontrivial_drugs])
            b_mean = np.mean([bas_df[bas_df["perturbation"] == d].iloc[0][m] for d in nontrivial_drugs])
            if a_mean == -1.0 and b_mean == -1.0:
                continue
            diff = a_mean - b_mean
            if higher_better:
                winner = "Adaptive" if diff > 0 else "Baseline"
            else:
                winner = "Adaptive" if diff < 0 else "Baseline"
            sign = "+" if diff > 0 else ""
            print(f"  {NICE_NAMES.get(m, m):<25} A={a_mean:.6f}  B={b_mean:.6f}  diff={sign}{diff:.6f}  -> {winner}")


# ---------------------------------------------------------------------------
# Main
# ---------------------------------------------------------------------------

def main():
    parser = argparse.ArgumentParser(description="Visualize B-cell experiment results")
    parser.add_argument("--results-dir", required=True, help="Path to bcell_test_results")
    parser.add_argument("--output-dir", default=None, help="Output dir for figures (default: results-dir/figures)")
    args = parser.parse_args()

    results_dir = Path(args.results_dir)
    output_dir = Path(args.output_dir) if args.output_dir else results_dir / "figures"
    output_dir.mkdir(parents=True, exist_ok=True)

    print(f"Results dir: {results_dir}")
    print(f"Output dir:  {output_dir}")

    # Load data
    ada_df, bas_df = load_per_pert_results(results_dir)
    comparison_df = load_comparison(results_dir)

    # Print text summary
    print_summary_table(ada_df, bas_df)

    # Generate figures
    print("\nGenerating figures...")

    # Per-drug bar charts
    drugs = sorted(set(ada_df["perturbation"]) & set(bas_df["perturbation"]))
    for drug in drugs:
        plot_per_drug_bars(ada_df, bas_df, output_dir, drug)
        ada_row = ada_df[ada_df["perturbation"] == drug].iloc[0]
        bas_row = bas_df[bas_df["perturbation"] == drug].iloc[0]
        plot_radar(ada_row, bas_row, output_dir, drug)

    # Mean comparison
    plot_grouped_comparison(comparison_df, output_dir)

    # Dabrafenib detail
    plot_dabrafenib_detail(ada_df, bas_df, output_dir)

    print(f"\nAll figures saved to {output_dir}")


if __name__ == "__main__":
    main()