#!/usr/bin/env python3

"""Plot per-model non-LLM overhead breakdown across models for *mix projects.

Usage:
    python plot_model_overhead_bars_mix.py

This script scans all direct subdirectories under the current "Part2" folder
whose names end with "mix" (e.g. RecruitmentAssistant-H_A2A).
If a subdirectory contains a "performance_breakdown_summary_by_model.csv",
we read that file and, for that project, generate one stacked bar chart:

- One figure per project (per CSV).
- In each figure there are up to 7 bars, one per model, with fixed
  left-to-right order:
    GPT-5, GPT-4o-mini, DeepSeek-V3-1, DeepSeek-R1,
    Gemini-2.5-flash, Gemini-2.5-flash-nothinking, Qwen3-235b.
- Each bar is stacked by the following components (ms totals over all runs):
    total_Tool_OVERHEAD,
    total_A2A_OVERHEAD,
    total_LangGraph_Framework_OVERHEAD,
    total_CrewAI_Framework_OVERHEAD,
    total_AutoGen_Framework_OVERHEAD,
    total_Server_OVERHEAD.
- Within a bar, these 6 components are normalized so that the total bar
  height is 1.0 (Latency Breakdown from 0 to 1).
- Each segment is annotated with its absolute time in ms.

The resulting PNG is written into each project folder as
"model_overhead_bars_mix.pdf".
"""

import csv
from collections import defaultdict
from pathlib import Path
from typing import Dict, List
import math

import matplotlib.pyplot as plt
from matplotlib.ticker import FuncFormatter

# Use a serif font similar to "New Roma time" for all text
plt.rcParams["font.family"] = "Times New Roman"

# Fixed model order (must match the names used in the CSV files)
MODEL_ORDER: List[str] = [
    "GPT-5",
    "GPT-4o-mini",
    "DeepSeek-V3-1",
    "DeepSeek-R1",
    "Gemini-2.5-flash",
    "Gemini-2.5-flash-nothinking",
    "Qwen3-235b",
]

# Optional display labels
MODEL_LABELS: Dict[str, str] = {
    "GPT-5": "GPT-5",
    "GPT-4o-mini": "GPT-4o-mini",
    "DeepSeek-V3-1": "DeepSeek-V3.1",
    "DeepSeek-R1": "DeepSeek-R1",
    "Gemini-2.5-flash": "Gemini-2.5",
    "Gemini-2.5-flash-nothinking": "Gemini-2.5-NT",
    "Qwen3-235b": "Qwen3-235b",
}

# Short labels for project (mix) names on the x-axis
PROJECT_LABELS: Dict[str, str] = {
    "SQLAssistant-H_A2A": "SQL Asst.",
    "RecruitmentAssistant-H_A2A": "Recruitment",
    "LandingPageGenerator-H_A2A": "Landing Pg.",
    "SocialMediaManager-H_A2A": "Social M. M.",
    "BookWriter-H_A2A": "Write Book",
    "__overall__": "Overall",
}

# Components to visualize (key in CSV -> logical name -> color)
COMPONENT_KEYS: List[str] = [
    "total_Tool_OVERHEAD",
    "total_Framework_OVERHEAD",
    "total_A2A_OVERHEAD",
    "total_Server_OVERHEAD",
]

COMPONENT_LABELS: Dict[str, str] = {
    "total_Tool_OVERHEAD": "Tool",
    "total_Framework_OVERHEAD": "Framework",
    "total_A2A_OVERHEAD": "A2A",
    "total_Server_OVERHEAD": "Server",
}

COMPONENT_COLORS: Dict[str, str] = {
    # Custom conference-style palette (low saturation, easily distinguishable)
    "total_Tool_OVERHEAD": "#88a4c9",
    "total_Framework_OVERHEAD": "#ff8696",
    "total_A2A_OVERHEAD": "#bbe6dd",
    "total_Server_OVERHEAD": "#fde8b2",
}


def find_model_summary_csvs(root: Path) -> List[Path]:
    """Find all performance_breakdown_summary_by_model.csv under *mix subdirs."""

    csv_paths: List[Path] = []
    for sub in root.iterdir():
        if not sub.is_dir():
            continue
        if not sub.name.endswith("H_A2A"):
            continue
        candidate = sub / "performance_breakdown_summary_by_model.csv"
        if candidate.exists():
            csv_paths.append(candidate)
    csv_paths.sort()
    return csv_paths


def load_model_components(csv_path: Path) -> Dict[str, Dict[str, float]]:
    """Load per-model component times from a summary CSV.

    Returns:
        data[model][component_key] = value_ms
    """

    data: Dict[str, Dict[str, float]] = defaultdict(dict)
    with csv_path.open("r", encoding="utf-8", newline="") as f:
        reader = csv.DictReader(f)
        for row in reader:
            model = (row.get("model") or "").strip()
            if not model:
                continue
            for key in COMPONENT_KEYS:
                try:
                    val = float(row.get(key, "0") or 0)
                except ValueError:
                    val = 0.0
                data[model][key] = val
    return data


def compute_percent_labels(shares: List[float]) -> List[float]:
    total = sum(shares)
    if total <= 0.0:
        return [0.0 for _ in shares]
    raw = [(s / total) * 10000.0 for s in shares]
    floors = [int(math.floor(r)) for r in raw]
    floor_sum = sum(floors)
    diff = 10000 - floor_sum
    remainders = [r - f for r, f in zip(raw, floors)]
    order = sorted(range(len(shares)), key=lambda i: remainders[i], reverse=True)
    if diff > 0:
        for k in range(min(diff, len(order))):
            floors[order[k]] += 1
    elif diff < 0:
        for k in range(min(-diff, len(order))):
            floors[order[-1 - k]] -= 1
    return [v / 100.0 for v in floors]


def compute_mix_component_shares(
    model_to_components: Dict[str, Dict[str, float]],
) -> Dict[str, float]:
    """Compute average component shares across models for one mix project."""

    # Weighted by absolute non-LLM time (sum of the four components) so that
    # models with more total non-LLM overhead contribute proportionally more.
    sums = {k: 0.0 for k in COMPONENT_KEYS}
    total_ms_sum = 0.0

    for model in MODEL_ORDER:
        comps = model_to_components.get(model)
        if not comps:
            continue
        ms_vals = [float(comps.get(k, 0.0) or 0.0) for k in COMPONENT_KEYS]
        total_ms = sum(ms_vals)
        if total_ms <= 0.0:
            continue
        total_ms_sum += total_ms
        for key, val in zip(COMPONENT_KEYS, ms_vals):
            sums[key] += val

    if total_ms_sum <= 0.0:
        print("  all models have zero non-LLM overhead; leaving empty placeholder")
        return {k: 0.0 for k in COMPONENT_KEYS}, 0.0

    shares = {k: v / total_ms_sum for k, v in sums.items()}
    return shares, total_ms_sum


def plot_model_overhead_bars(
    project_names: List[str],
    mix_shares: Dict[str, Dict[str, float]],
    out_dir: Path,
) -> None:
    """Plot stacked bars for one project across all models.

    - One bar per model (7 bars total, some may be missing if no data).
    - Each bar is stacked by the four non-LLM overhead components listed
      in COMPONENT_KEYS, normalized to height 1.0.
    - Each segment is annotated with its absolute ms value.
    """

    x = list(range(len(project_names)))

    # Prepare per-component shares per mix (already normalized)
    shares_by_comp: Dict[str, List[float]] = {k: [] for k in COMPONENT_KEYS}
    for name in project_names:
        shares = mix_shares.get(name, {})
        for key in COMPONENT_KEYS:
            shares_by_comp[key].append(float(shares.get(key, 0.0) or 0.0))

    fig, ax = plt.subplots(figsize=(max(7.5, 1.0 * len(project_names)), 7))

    # Build stacked bars
    bottoms = [0.0 for _ in x]
    bar_handles = {}
    bar_width = 0.98
    for key in COMPONENT_KEYS:
        heights = shares_by_comp[key]
        color = COMPONENT_COLORS[key]
        bars = ax.bar(
            x,
            heights,
            bottom=bottoms,
            color=color,
            edgecolor="none",  # no bar borders
            width=bar_width,
        )
        bar_handles[key] = bars
        # Update bottoms for next component
        bottoms = [b + h for b, h in zip(bottoms, heights)]

    # Reduce inner left/right whitespace inside the axes: make the outer
    # bars almost touch the plot boundaries.
    margin = (1.0 - bar_width) / 2.0
    ax.set_xlim(-0.5 + margin, len(project_names) - 0.5 - margin)

    # Annotate percentage values for each segment (skip zeros)
    for idx, name in enumerate(project_names):
        shares = [
            float(mix_shares.get(name, {}).get(k, 0.0) or 0.0) for k in COMPONENT_KEYS
        ]
        active_indices = [i for i, s in enumerate(shares) if s > 0.0]
        if not active_indices:
            continue
        active_shares = [shares[i] for i in active_indices]
        active_percents = compute_percent_labels(active_shares)
        for local_pos, comp_idx in enumerate(active_indices):
            key = COMPONENT_KEYS[comp_idx]
            share = shares[comp_idx]
            percent = active_percents[local_pos]
            if share <= 0.0:
                continue
            bars = bar_handles[key]
            bar = bars[idx]
            # Explicitly compute the horizontal center of the bar segment
            x_center = bar.get_x() + bar.get_width() / 2.0
            y_center = bar.get_y() + bar.get_height() / 2.0
            ax.text(
                x_center,
                y_center,
                f"{percent:.2f}",
                ha="center",
                va="center",
                fontsize=22,
                fontweight="bold",
            )

    # X axis labels: one per mix project (use short labels where available)
    tick_labels = [PROJECT_LABELS.get(name, name) for name in project_names]
    ax.set_xticks(x)
    ax.set_xticklabels(tick_labels, rotation=30, ha="right")

    # Enlarge tick label fonts on both axes
    ax.tick_params(axis="x", labelsize=18, pad=6)
    ax.tick_params(axis="y", labelsize=24)
    for label in ax.get_xticklabels():
        label.set_fontweight("bold")
    for label in ax.get_yticklabels():
        label.set_fontweight("bold")

    ax.set_ylim(0.0, 1.0)
    ax.set_ylabel("(%)", fontsize=21, fontweight="bold", labelpad=-10)

    # Show y-axis ticks as plain integers
    ax.yaxis.set_major_formatter(FuncFormatter(lambda y, _: f"{y * 100:.0f}"))

    # Legend at top, horizontal, with inline "Component" label.
    # Use border-free patches in the legend as well.
    handles = [
        plt.Rectangle((0, 0), 1, 1, facecolor="none", edgecolor="none"),
    ]
    labels = ["Component"]
    # Legend order follows bar stack order from top to bottom:
    # Server (top), A2A, Framework, Tool (bottom).
    legend_order_keys = list(reversed(COMPONENT_KEYS))
    for key in legend_order_keys:
        handles.append(
            plt.Rectangle(
                (0, 0),
                1,
                1,
                facecolor=COMPONENT_COLORS[key],
                edgecolor="none",
            )
        )
        labels.append(COMPONENT_LABELS[key])

    legend = ax.legend(
        handles,
        labels,
        fontsize=19,
        loc="upper left",
        # Keep Component near the y-axis label, but avoid extending the
        # legend too far left, which would create extra whitespace on the
        # right after tight cropping.
        bbox_to_anchor=(-0.06, 1.09),
        ncol=len(labels),  # all legend items in a single horizontal row
        frameon=False,
        columnspacing=0.8,
        handletextpad=0.5,
        handlelength=0.3,
        prop={"weight": "bold", "size": 19},
    )

    # Make the heading label slightly larger
    legend_texts = legend.get_texts()
    if legend_texts:
        legend_texts[0].set_fontsize(20)
        legend_texts[0].set_fontweight("bold")

    # Tighten layout and crop extra whitespace (especially left/right)
    fig.tight_layout(pad=0.0)

    out_file = out_dir / "model_overhead_bars_mix.pdf"
    # Use bbox_inches="tight" and a very small pad so that the figure
    # boundary fully contains the axes spines (including the right border)
    # without introducing visible extra whitespace.
    fig.savefig(out_file, dpi=200, bbox_inches="tight", pad_inches=0.02)
    plt.close(fig)
    print(f"saved figure: {out_file}")


def main() -> None:
    # Assume this script is placed in Part2 directory
    part2_dir = Path(__file__).resolve().parent

    # Collect all *mix subdirectories under Part2 (whether they have data or not)
    mix_dirs = [
        sub
        for sub in part2_dir.iterdir()
        if sub.is_dir() and sub.name.endswith("H_A2A")
    ]
    mix_dirs.sort(key=lambda p: p.name)

    if not mix_dirs:
        print("no *H_A2A subdirs found under Part2")
        return

    mix_shares: Dict[str, Dict[str, float]] = {}
    project_weights: Dict[str, float] = {}
    any_data = False

    for mix_dir in mix_dirs:
        project_name = mix_dir.name
        csv_path = mix_dir / "performance_breakdown_summary_by_model.csv"
        if not csv_path.exists():
            print(
                f"no performance_breakdown_summary_by_model.csv in {mix_dir}, "
                "leaving empty placeholder"
            )
            mix_shares[project_name] = {k: 0.0 for k in COMPONENT_KEYS}
            continue

        print(f"processing {csv_path} (project={project_name})")
        model_to_components = load_model_components(csv_path)
        if not model_to_components:
            print(f"  no model data in {csv_path}, leaving empty placeholder")
            mix_shares[project_name] = {k: 0.0 for k in COMPONENT_KEYS}
            continue

        shares, weight = compute_mix_component_shares(model_to_components)
        mix_shares[project_name] = shares
        project_weights[project_name] = weight
        any_data = True

    if not any_data:
        print("no model data in any *mix project; nothing to plot")
        return

    project_names = [d.name for d in mix_dirs]

    total_weight = 0.0
    for name in project_names:
        total_weight += float(project_weights.get(name, 0.0) or 0.0)

    if total_weight > 0.0:
        overall = {k: 0.0 for k in COMPONENT_KEYS}
        for name in project_names:
            weight = float(project_weights.get(name, 0.0) or 0.0)
            if weight <= 0.0:
                continue
            shares = mix_shares.get(name, {})
            for key in COMPONENT_KEYS:
                overall[key] += float(shares.get(key, 0.0) or 0.0) * weight

        for key in COMPONENT_KEYS:
            overall[key] = overall[key] / total_weight

        mix_shares["__overall__"] = overall
        project_names_with_overall = project_names + ["__overall__"]
    else:
        project_names_with_overall = project_names

    plot_model_overhead_bars(project_names_with_overall, mix_shares, part2_dir)


if __name__ == "__main__":
    main()