#!/usr/bin/env python3
"""
DEPRECATED — This file has been merged into swap_analysis.py.

All functionality (Molmo2Extractor, Qwen3VLExtractor, merge-only types,
per-model-type logging, etc.) is now available directly via:

    python swap_analysis.py --model_type <type>

See swap_analysis.py --help for all supported model types.
This file is kept for reference only and will be removed in a future cleanup.

Original docstring preserved below:
------------------------------------
Swap Analysis — New Models Extension

Adds Molmo2-8B, Qwen3-VL-32B-Instruct, and Qwen3-VL-235B-A22B-Instruct
to the swap analysis pipeline.
Results are saved under new model_type directories, never overwriting existing results.

Runnable model types  (actually run inference + save per-scale data)
---------------------------------------------------------------------
  molmo_big   : Molmo2-8B only            → saves to results/molmo_big/
  qwen_big    : Qwen3-VL-32B only         → saves to results/qwen_big/
  qwen_super  : Qwen3-VL-235B-A22B only   → saves to results/qwen_super/
  big_trio    : Molmo2-8B + RoboRefer + Qwen3-VL-32B → saves to results/big_trio/

Merge-only model types  (load existing data, output cross-scale plots)
-----------------------------------------------------------------------
  molmo_all  : results/molmo/ (vanilla→2m) + results/molmo_big/ (molmo2)
               → plots saved to results/molmo_all/
  qwen_all   : results/qwen/  (vanilla→2m) + results/qwen_big/  (qwen3_32b)
               → plots saved to results/qwen_all/
  (big_trio also uses --merge like other types)

Logging
-------
  Each run writes its own log to:  logs/{model_type}.log  (appended)
  alongside the usual stderr output.

Environment notes
-----------------
  molmo_big, qwen_big, qwen_super, big_trio (molmo2+qwen3_32b) → qwen3 conda env
  big_trio roborefer scale only                                  → vila  conda env

Usage examples
--------------
# Step 1 — run new models (qwen3 env)
conda run -n qwen3 python swap_analysis_new_models.py --model_type molmo_big
conda run -n qwen3 python swap_analysis_new_models.py --model_type qwen_big
conda run -n qwen3 python swap_analysis_new_models.py --model_type qwen_super

# Step 2 — merge new results with existing molmo/qwen results (qwen3 env)
conda run -n qwen3 python swap_analysis_new_models.py --model_type molmo_all --merge
conda run -n qwen3 python swap_analysis_new_models.py --model_type qwen_all  --merge

# big_trio (multi-env): run per-env, then merge
conda run -n qwen3 python swap_analysis_new_models.py --model_type big_trio --scales molmo2 qwen3_32b
conda run -n vila  python swap_analysis_new_models.py --model_type big_trio --scales roborefer
conda run -n qwen3 python swap_analysis_new_models.py --model_type big_trio --merge

# Re-run a single scale
conda run -n qwen3 python swap_analysis_new_models.py --model_type molmo_big --scales molmo2
"""

import os
import sys
import json
import argparse
import logging
import random

import torch
import numpy as np
import pandas as pd

# ── Import common pipeline from swap_analysis ─────────────────────────────────

_HERE = os.path.dirname(os.path.abspath(__file__))
if _HERE not in sys.path:
    sys.path.insert(0, _HERE)

import swap_analysis as _sa
from swap_analysis import (
    # Base / existing extractors
    BaseHiddenStateExtractor,
    MolmoExtractor,
    NVILAExtractor,
    RoboReferExtractor,
    Qwen25VLExtractor,
    # Data loading
    load_swap_pairs,
    build_hf_bbox_cache,
    create_cross_group_quads,
    # Feature extraction
    extract_swap_features,
    extract_cross_group_features,
    # Analysis
    compute_delta_consistency,
    compute_delta_similarity_matrix,
    compute_cross_group_alignment,
    compute_prediction_stats,
    check_category_validity,
    filter_both_correct,
    get_representative_layers,
    # Saving / loading
    save_scale_results,
    save_vectors_npz,
    load_scale_consistency,
    load_within_cat_consistency,
    load_scale_alignment,
    load_delta_heatmaps,
    # Per-scale plots
    plot_within_cat_consistency_trajectory,
    plot_sign_corrected_consistency_trajectory,
    plot_cross_group_alignment_trajectory,
    plot_delta_heatmap,
    plot_pca_embeddings,
    plot_pca_3d,
    plot_pred_stats_bars,
    plot_pred_stats_trajectory,
    # Cross-scale (merge) plots
    plot_cross_scale_consistency,
    plot_cross_scale_within_cat_consistency,
    plot_cross_scale_alignment,
    plot_delta_trajectory,
    plot_summary_barplot,
    # Post-hoc helpers
    run_accuracy_charts,
    run_unify_ylim,
    # Constants
    GROUP_ORDER,
)

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)


def _setup_file_logging(model_type: str) -> str:
    """Add a per-model-type FileHandler so each run gets its own log file.

    Log is written to  <script_dir>/logs/{model_type}.log  (append mode).
    Returns the resolved log file path.
    """
    log_dir = os.path.join(_HERE, 'logs')
    os.makedirs(log_dir, exist_ok=True)
    log_path = os.path.join(log_dir, f'{model_type}.log')

    fh = logging.FileHandler(log_path, mode='a', encoding='utf-8')
    fh.setLevel(logging.INFO)
    fh.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))

    # Attach to both the module logger and the root logger so imported
    # swap_analysis functions (which use their own module logger) are captured.
    logging.getLogger().addHandler(fh)

    return log_path

# ============================================================================
# Local HuggingFace cache helpers
# ============================================================================

# Root of the shared HF hub cache on this machine
HF_HUB_DIR = '/data/shared/Qwen/mydisk/huggingface/hub'


def resolve_local_path(model_path: str) -> str:
    """
    Resolve a HuggingFace model ID (e.g. 'Qwen/Qwen3-VL-32B-Instruct') to its
    local snapshot path under HF_HUB_DIR, if the model has been cached there.

    - If model_path is already an absolute path, return it unchanged.
    - If the model is found in the local cache, return the snapshot directory.
    - If not found locally, log a warning and return the original HF ID
      (transformers will then attempt to download from the Hub).
    """
    if os.path.isabs(model_path):
        return model_path  # already a local absolute path

    # HF hub stores models as 'models--org--model-name'
    cache_name    = 'models--' + model_path.replace('/', '--')
    snapshots_dir = os.path.join(HF_HUB_DIR, cache_name, 'snapshots')

    if os.path.isdir(snapshots_dir):
        snapshots = sorted(os.listdir(snapshots_dir))
        if snapshots:
            local_path = os.path.join(snapshots_dir, snapshots[-1])
            logger.info(f"Local cache found: {model_path}  →  {local_path}")
            return local_path

    logger.warning(
        f"Model not found in local cache: '{model_path}'\n"
        f"  Expected at: {snapshots_dir}\n"
        f"  Will fall back to online HuggingFace Hub download.\n"
        f"  To cache locally first, run:\n"
        f"    python -c \"from huggingface_hub import snapshot_download; "
        f"snapshot_download('{model_path}', cache_dir='{HF_HUB_DIR}')\""
    )
    return model_path  # fallback → online


# ============================================================================
# Constants
# ============================================================================

# Extend upstream SCALE_COLORS in-place so all imported plot functions see them
_sa.SCALE_COLORS.update({
    'molmo2':     '#17becf',   # cyan
    'qwen3_32b':  '#bcbd22',   # yellow-green
    'qwen3_235b': '#d62728',   # red
})
SCALE_COLORS = _sa.SCALE_COLORS  # convenience alias

# ── Runnable types: define which extractors + model paths to use ───────────────
# Each value is (ExtractorClassName, model_path)
MODEL_CONFIGS_NEW = {
    'molmo_big': {
        'molmo2': ('Molmo2Extractor', 'allenai/Molmo2-8B'),
    },
    'qwen_big': {
        'qwen3_32b': ('Qwen3VLExtractor', 'Qwen/Qwen3-VL-32B-Instruct'),
    },
    'qwen_super': {
        # MoE variant: 235B total / 22B activated params, same Qwen3-VL loading API
        'qwen3_235b': ('Qwen3VLExtractor', 'Qwen/Qwen3-VL-235B-A22B-Instruct'),
    },
    'big_trio': {
        'molmo2':    ('Molmo2Extractor',    'allenai/Molmo2-8B'),
        'roborefer': ('RoboReferExtractor', '/data/shared/Qwen/mydisk/RoboRefer_model'),
        'qwen3_32b': ('Qwen3VLExtractor',   'Qwen/Qwen3-VL-32B-Instruct'),
    },
}

# ── Merge-only types: combine data from multiple source directories ────────────
# scale_sources: scale → source model_type directory name under results/
# required_dirs: list of source dirs that MUST exist before merging
MERGE_ONLY_CONFIGS = {
    'molmo_all': {
        'scale_order': ['vanilla', '80k', '400k', '800k', '2m', 'molmo2'],
        'scale_sources': {
            'vanilla': 'molmo',
            '80k':     'molmo',
            '400k':    'molmo',
            '800k':    'molmo',
            '2m':      'molmo',
            'molmo2':  'molmo_big',
        },
        'required_dirs': ['molmo', 'molmo_big'],
    },
    'qwen_all': {
        'scale_order': ['vanilla', '80k', '400k', '800k', '2m', 'qwen3_32b'],
        'scale_sources': {
            'vanilla':   'qwen',
            '80k':       'qwen',
            '400k':      'qwen',
            '800k':      'qwen',
            '2m':        'qwen',
            'qwen3_32b': 'qwen_big',
        },
        'required_dirs': ['qwen', 'qwen_big'],
    },
}

# Scale ordering for merge (runnable types)
SCALE_ORDERS = {
    'molmo_big':  ['molmo2'],
    'qwen_big':   ['qwen3_32b'],
    'qwen_super': ['qwen3_235b'],
    'big_trio':   ['molmo2', 'roborefer', 'qwen3_32b'],
}

# All valid --model_type choices (runnable + merge-only)
ALL_MODEL_TYPES = list(MODEL_CONFIGS_NEW.keys()) + list(MERGE_ONLY_CONFIGS.keys())


# ============================================================================
# New Extractor: Molmo2-8B
# ============================================================================

class Molmo2Extractor(BaseHiddenStateExtractor):
    """
    Extractor for allenai/Molmo2-8B.

    Uses AutoModelForImageTextToText (messages-dict input format).
    LLM backbone: Qwen3. Transformer layers are discovered dynamically because
    the exact attribute path depends on the custom model architecture.

    Differences from MolmoExtractor:
      - apply_chat_template instead of processor.process
      - model.generate(**inputs) instead of generate_from_batch
      - device_map='auto' for multi-GPU support
    """

    def _load_model(self):
        from transformers import AutoProcessor, AutoModelForImageTextToText
        self.processor = AutoProcessor.from_pretrained(
            self.model_path, trust_remote_code=True
        )
        self.model = AutoModelForImageTextToText.from_pretrained(
            self.model_path,
            trust_remote_code=True,
            torch_dtype='auto',
            device_map='auto',
        ).eval()
        self._find_llm_layers()
        logger.info(f"Loaded Molmo2 from {self.model_path}")

    def _find_llm_layers(self):
        """Dynamically locate the LLM transformer layer list."""
        # Try ordered candidate paths from model root
        candidates = [
            ['model', 'layers'],                    # Qwen-VL / most common
            ['language_model', 'model', 'layers'],  # LLaVA-style
            ['model', 'model', 'layers'],            # nested Qwen
        ]
        for path in candidates:
            obj = self.model
            for attr in path:
                obj = getattr(obj, attr, None)
                if obj is None:
                    break
            if obj is not None and hasattr(obj, '__len__') and len(obj) > 0:
                self.llm_layers = obj
                logger.info(f"Molmo2: layers at '{'.'.join(path)}', count={len(obj)}")
                return

        # Fallback: scan named_modules for the largest .layers list
        best, best_name, best_len = None, '', 0
        for name, module in self.model.named_modules():
            if name.endswith('.layers') and hasattr(module, '__len__') and len(module) > best_len:
                best, best_name, best_len = module, name, len(module)
        if best is not None:
            self.llm_layers = best
            logger.info(f"Molmo2: layers via scan at '{best_name}', count={best_len}")
            return

        raise ValueError("Could not find transformer layers in Molmo2 model")

    def _get_num_layers(self) -> int:
        return len(self.llm_layers)

    def _get_layer_module(self, layer_idx: int):
        return self.llm_layers[layer_idx]

    def extract_and_predict(self, image, question):
        self.hidden_states = {}
        messages = [{
            "role": "user",
            "content": [
                {"type": "image", "image": image},
                {"type": "text",  "text":  question},
            ],
        }]
        inputs = self.processor.apply_chat_template(
            messages,
            tokenize=True,
            add_generation_prompt=True,
            return_tensors="pt",
            return_dict=True,
        )
        inputs = {k: v.to(self.model.device) for k, v in inputs.items()}
        with torch.inference_mode():
            generated_ids = self.model.generate(**inputs, max_new_tokens=20, do_sample=False)
        input_len = inputs['input_ids'].shape[1]
        answer = self.processor.tokenizer.decode(
            generated_ids[0, input_len:], skip_special_tokens=True
        ).strip()
        return self.hidden_states.copy(), answer


# ============================================================================
# New Extractor: Qwen3-VL-32B-Instruct
# ============================================================================

class Qwen3VLExtractor(BaseHiddenStateExtractor):
    """
    Extractor for Qwen/Qwen3-VL-32B-Instruct (and other Qwen3-VL variants).

    Key differences from Qwen25VLExtractor:
      - AutoModelForImageTextToText + trust_remote_code=True
      - process_vision_info requires image_patch_size=16
      - processor call requires do_resize=False
      - 32×32 px patches → different min/max_pixels

    Qwen3-VL wraps the LLM under model.model.language_model (not model.model.layers
    directly like Qwen2.5-VL), so layer path is discovered dynamically.
    Layer count: 64 for 32B (Qwen3-32B backbone), auto-detected.
    """

    MIN_PIXELS = 1280  * 32 * 32   # 1,310,720  (32×32 px patches)
    MAX_PIXELS = 16384 * 32 * 32   # 16,777,216

    def _load_model(self):
        from transformers import AutoProcessor, AutoModelForImageTextToText
        self.processor = AutoProcessor.from_pretrained(
            self.model_path, trust_remote_code=True
        )
        self.model = AutoModelForImageTextToText.from_pretrained(
            self.model_path,
            trust_remote_code=True,
            torch_dtype='auto',
            device_map='auto',
            attn_implementation='flash_attention_2',
        ).eval()
        self._find_llm_layers()
        logger.info(f"Loaded Qwen3-VL from {self.model_path}")

    def _find_llm_layers(self):
        """Dynamically locate the LLM transformer layer list."""
        # Qwen3-VL wraps LLM under language_model; try common paths
        candidates = [
            ['model', 'language_model', 'model', 'layers'],  # Qwen3-VL expected
            ['language_model', 'model', 'layers'],            # flat wrapper
            ['model', 'model', 'layers'],                     # Qwen2.5-VL style
            ['model', 'layers'],                              # simple
        ]
        for path in candidates:
            obj = self.model
            for attr in path:
                obj = getattr(obj, attr, None)
                if obj is None:
                    break
            if obj is not None and hasattr(obj, '__len__') and len(obj) > 0:
                self.llm_layers = obj
                logger.info(f"Qwen3-VL: layers at '{'.'.join(path)}', count={len(obj)}")
                return

        # Fallback: scan named_modules for the largest .layers list
        best, best_name, best_len = None, '', 0
        for name, module in self.model.named_modules():
            if name.endswith('.layers') and hasattr(module, '__len__') and len(module) > best_len:
                best, best_name, best_len = module, name, len(module)
        if best is not None:
            self.llm_layers = best
            logger.info(f"Qwen3-VL: layers via scan at '{best_name}', count={best_len}")
            return

        raise ValueError("Could not find transformer layers in Qwen3-VL model")

    def _get_num_layers(self) -> int:
        return len(self.llm_layers)

    def _get_layer_module(self, layer_idx: int):
        return self.llm_layers[layer_idx]

    def extract_and_predict(self, image, question):
        self.hidden_states = {}
        messages = [{"role": "user", "content": [
            {
                "type": "image", "image": image,
                "min_pixels": self.MIN_PIXELS, "max_pixels": self.MAX_PIXELS,
            },
            {"type": "text", "text": question},
        ]}]
        text = self.processor.apply_chat_template(
            messages, tokenize=False, add_generation_prompt=True
        )
        from qwen_vl_utils import process_vision_info
        # image_patch_size=16 and do_resize=False are both required for Qwen3-VL
        images, videos, _ = process_vision_info(
            messages,
            image_patch_size=16,
            return_video_kwargs=True,
            return_video_metadata=True,
        )
        inputs = self.processor(
            text=text,
            images=images,
            videos=videos,
            do_resize=False,
            return_tensors="pt",
        ).to(self.model.device)
        with torch.no_grad():
            output_ids = self.model.generate(**inputs, max_new_tokens=20, do_sample=False)
        input_len = inputs['input_ids'].shape[1]
        answer = self.processor.tokenizer.decode(
            output_ids[0, input_len:], skip_special_tokens=True
        ).strip()
        return self.hidden_states.copy(), answer


# ============================================================================
# Extractor Registry
# ============================================================================

EXTRACTOR_CLASSES = {
    'MolmoExtractor':     MolmoExtractor,
    'NVILAExtractor':     NVILAExtractor,
    'RoboReferExtractor': RoboReferExtractor,
    'Qwen25VLExtractor':  Qwen25VLExtractor,
    'Molmo2Extractor':    Molmo2Extractor,
    'Qwen3VLExtractor':   Qwen3VLExtractor,
}


def get_extractor_new(model_type: str, scale: str, device: str = 'cuda'):
    """Create the appropriate extractor from MODEL_CONFIGS_NEW.
    HF model IDs are automatically resolved to local snapshot paths when cached.
    """
    cls_name, model_path = MODEL_CONFIGS_NEW[model_type][scale]
    model_path = resolve_local_path(model_path)   # prefer local cache
    ExtractorCls = EXTRACTOR_CLASSES[cls_name]
    logger.info(f"Creating {cls_name} for scale='{scale}' from {model_path}")
    return ExtractorCls(model_path, device=device)


# ============================================================================
# Per-scale processing (mirrors process_scale in swap_analysis.py)
# ============================================================================

def process_scale_new(args, scale, swap_pairs, quads):
    """Run the full swap-analysis pipeline for one scale of a runnable model_type."""
    cls_name, model_path = MODEL_CONFIGS_NEW[args.model_type][scale]

    logger.info(f"\n{'='*60}")
    logger.info(f"Processing  {args.model_type}  /  {scale}  [{cls_name}]")
    logger.info(f"Model path: {model_path}")
    logger.info(f"{'='*60}")

    extractor    = get_extractor_new(args.model_type, scale, device=args.device)
    target_layers = extractor.target_layers

    output_dir = os.path.join(args.output_dir, args.model_type)
    plots_dir  = os.path.join(output_dir, 'plots')
    os.makedirs(plots_dir, exist_ok=True)

    # ── Phase A ───────────────────────────────────────────────────────────────
    logger.info("\n--- Phase A: Extracting swap pair features ---")
    swap_records = extract_swap_features(
        extractor, swap_pairs,
        max_samples_per_category=args.max_samples_per_category,
    )

    # ── Phase B ───────────────────────────────────────────────────────────────
    logger.info("\n--- Phase B: Extracting cross-group features ---")
    quad_records = extract_cross_group_features(extractor, quads) if quads else []

    # ── Phase C: analysis ─────────────────────────────────────────────────────
    logger.info("\n--- Phase C: Analysis ---")
    category_validity = check_category_validity(swap_records, scale)
    unreliable_cats = [c for c, v in category_validity.items() if not v['reliable']]
    if unreliable_cats:
        logger.warning(f"  Unreliable categories: {unreliable_cats}")

    within_cat_all, sign_corrected_all = compute_delta_consistency(swap_records, target_layers)

    both_correct_records = filter_both_correct(swap_records)
    logger.info(f"  Both-correct pairs: {len(both_correct_records)}/{len(swap_records)}")
    within_cat_bc, sign_corrected_bc = compute_delta_consistency(both_correct_records, target_layers)

    cross_alignment = compute_cross_group_alignment(quad_records, target_layers)
    pred_stats      = compute_prediction_stats(swap_records, scale)

    delta_heatmaps_all, delta_heatmaps_bc = {}, {}
    for layer in target_layers:
        delta_heatmaps_all[layer] = compute_delta_similarity_matrix(swap_records, layer)
        if both_correct_records:
            delta_heatmaps_bc[layer] = compute_delta_similarity_matrix(both_correct_records, layer)

    max_layer = max(target_layers)
    for group in GROUP_ORDER:
        key = (group, max_layer)
        if key in sign_corrected_all:
            logger.info(f"  Sign-corrected [{group}, L{max_layer}]: "
                        f"{sign_corrected_all[key]['mean']:.4f} ± "
                        f"{sign_corrected_all[key]['std']:.4f}")
    if max_layer in cross_alignment:
        ca = cross_alignment[max_layer]
        logger.info(f"  Cross-group alignment L{max_layer}: "
                    f"{ca['per_sample_mean']:.4f} (perm={ca['permutation_mean']:.4f})")
    logger.info(f"  Accuracy orig={pred_stats['overall_acc_orig']:.1%}, "
                f"swap={pred_stats['overall_acc_swap']:.1%}, "
                f"both={pred_stats['overall_acc_both']:.1%}")

    # ── Phase D: save ─────────────────────────────────────────────────────────
    logger.info("\n--- Phase D: Saving results ---")
    save_vectors_npz(scale, swap_records, quad_records, target_layers, output_dir)
    save_scale_results(
        scale, swap_records, quad_records,
        within_cat_all, sign_corrected_all,
        cross_alignment, pred_stats, target_layers,
        category_validity, delta_heatmaps_all,
        output_dir, both_correct_tag='all_pairs',
    )
    if both_correct_records:
        save_scale_results(
            scale, both_correct_records, quad_records,
            within_cat_bc, sign_corrected_bc,
            cross_alignment, pred_stats, target_layers,
            category_validity, delta_heatmaps_bc,
            output_dir, both_correct_tag='both_correct',
        )

    # ── Phase E: per-scale plots ──────────────────────────────────────────────
    logger.info("\n--- Phase E: Per-scale plots ---")
    for condition, wc_data, sc_data, dh_data in [
        ('all',              within_cat_all, sign_corrected_all, delta_heatmaps_all),
        ('both_correct',     within_cat_bc,  sign_corrected_bc,  delta_heatmaps_bc),
        ('all_with_validity', within_cat_all, sign_corrected_all, delta_heatmaps_all),
    ]:
        if condition == 'both_correct' and not both_correct_records:
            continue

        cond_dir        = os.path.join(plots_dir, condition)
        os.makedirs(cond_dir, exist_ok=True)
        cond_unreliable = unreliable_cats if condition == 'all_with_validity' else []

        plot_within_cat_consistency_trajectory(
            wc_data, scale, args.model_type,
            os.path.join(cond_dir, f'within_cat_consistency_{scale}.png'))

        plot_sign_corrected_consistency_trajectory(
            sc_data, scale, args.model_type,
            os.path.join(cond_dir, f'sign_corrected_consistency_{scale}.png'))

        if cross_alignment:
            plot_cross_group_alignment_trajectory(
                cross_alignment, scale, args.model_type,
                os.path.join(cond_dir, f'cross_alignment_{scale}.png'))

        rep_layers = get_representative_layers(target_layers)
        for layer in rep_layers:
            df = dh_data.get(layer)
            if df is not None:
                plot_delta_heatmap(
                    df,
                    f'{args.model_type.upper()} ({scale}) - Delta Heatmap L{layer} ({condition})',
                    os.path.join(cond_dir, f'delta_heatmap_{scale}_L{layer}.png'),
                    unreliable_cats=cond_unreliable,
                )

    # PCA (2D and 3D)
    npz_path = os.path.join(output_dir, 'npz', f'vectors_{scale}.npz')
    if os.path.exists(npz_path):
        pca_dir = os.path.join(plots_dir, 'all', 'pca')
        os.makedirs(pca_dir, exist_ok=True)
        plot_pca_embeddings(npz_path, scale, args.model_type, pca_dir)

        pca_3d_dir = os.path.join(plots_dir, 'all', 'pca_3d')
        os.makedirs(pca_3d_dir, exist_ok=True)
        plot_pca_3d(npz_path, scale, args.model_type, pca_3d_dir)

    if pred_stats:
        pred_dir = os.path.join(plots_dir, 'all')
        os.makedirs(pred_dir, exist_ok=True)
        plot_pred_stats_bars(
            [pred_stats], args.model_type,
            os.path.join(pred_dir, f'pred_stats_bars_{scale}.png'))

    extractor.cleanup()
    logger.info(f"\n=== Scale '{scale}' complete ===")


# ============================================================================
# Merge helpers
# ============================================================================

def _check_merge_only_sources(output_dir: str, model_type: str) -> bool:
    """
    Verify required source directories have data.
    Returns True if all sources look healthy, False (with warnings) if not.
    """
    mc = MERGE_ONLY_CONFIGS[model_type]
    ok = True
    for req_dir in mc['required_dirs']:
        src_path = os.path.join(output_dir, req_dir)
        json_dir = os.path.join(src_path, 'json')
        if not os.path.isdir(src_path):
            logger.warning(
                f"[{model_type}] Required source directory not found: {src_path}\n"
                f"  → Run inference first:  python swap_analysis_new_models.py "
                f"--model_type {req_dir}"
                if req_dir in MODEL_CONFIGS_NEW else
                f"  → Run inference first:  python swap_analysis.py "
                f"--model_type {req_dir}"
            )
            ok = False
        elif not os.path.isdir(json_dir) or not any(
            f.startswith('pred_stats_') for f in os.listdir(json_dir)
        ):
            logger.warning(
                f"[{model_type}] Source directory exists but has no pred_stats JSON: {json_dir}\n"
                f"  → Inference may not have completed for '{req_dir}'."
            )
            ok = False
        else:
            scales_found = [
                f.replace('pred_stats_', '').replace('.json', '')
                for f in os.listdir(json_dir)
                if f.startswith('pred_stats_')
            ]
            logger.info(f"  [{req_dir}] found scales: {scales_found}")
    return ok


def _load_scale_data_multi(output_dir: str, model_type: str, scale: str, scale_sources: dict):
    """
    Load per-scale data for a single scale, looking in the correct source directory.
    Returns (sc, sc_bc, wc, wc_bc, align, pred_stats_dict, cat_validity_dict, dh, dh_bc)
    where any unavailable item is None / {}.
    """
    src_dir = os.path.join(output_dir, scale_sources.get(scale, model_type))

    sc    = load_scale_consistency(src_dir, scale, 'all_pairs')
    sc_bc = load_scale_consistency(src_dir, scale, 'both_correct')
    wc    = load_within_cat_consistency(src_dir, scale, 'all_pairs')
    wc_bc = load_within_cat_consistency(src_dir, scale, 'both_correct')
    align = load_scale_alignment(src_dir, scale)

    pred_stat = None
    pred_path = os.path.join(src_dir, 'json', f'pred_stats_{scale}.json')
    if os.path.exists(pred_path):
        with open(pred_path) as f:
            pred_stat = json.load(f)

    cat_validity = None
    cv_path = os.path.join(src_dir, 'json', f'category_validity_{scale}.json')
    if os.path.exists(cv_path):
        with open(cv_path) as f:
            cat_validity = json.load(f)

    dh    = load_delta_heatmaps(src_dir, scale, 'all_pairs')
    dh_bc = load_delta_heatmaps(src_dir, scale, 'both_correct')

    return sc, sc_bc, wc, wc_bc, align, pred_stat, cat_validity, dh, dh_bc


# ============================================================================
# Merge (cross-scale plots + accuracy + ylim unification)
# ============================================================================

def run_merge_new(args):
    """
    Generate cross-scale plots for a model_type.

    - For runnable types (molmo_big, qwen_big, big_trio):
        loads all data from results/{model_type}/ and saves plots there.
    - For merge-only types (molmo_all, qwen_all):
        loads per-scale data from the respective source directories
        (e.g. results/molmo/ and results/molmo_big/),
        saves all cross-scale plots to results/{model_type}/.
    """
    is_merge_only = args.model_type in MERGE_ONLY_CONFIGS

    # ── Determine scale order and data source strategy ────────────────────────
    if is_merge_only:
        mc           = MERGE_ONLY_CONFIGS[args.model_type]
        scale_order  = mc['scale_order']
        scale_sources = mc['scale_sources']

        logger.info(f"\n=== MERGE-ONLY mode: {args.model_type} ===")
        logger.info("Checking required source directories...")
        sources_ok = _check_merge_only_sources(args.output_dir, args.model_type)
        if not sources_ok:
            logger.warning(
                f"\n[WARNING] One or more source directories are missing or incomplete.\n"
                f"  Cross-scale plots for '{args.model_type}' may be partial.\n"
                f"  Run the missing model types first (see warnings above), then retry merge."
            )
    else:
        scale_order  = SCALE_ORDERS.get(args.model_type, list(MODEL_CONFIGS_NEW[args.model_type]))
        scale_sources = None  # all data lives in results/{model_type}/

    available_scales = [s for s in scale_order if s in args.scales]
    logger.info(f"Merging scales (in order): {available_scales}")

    # Output always goes to results/{model_type}/
    out_dir   = os.path.join(args.output_dir, args.model_type)
    plots_dir = os.path.join(out_dir, 'plots')
    os.makedirs(plots_dir, exist_ok=True)

    # ── Load per-scale data ───────────────────────────────────────────────────
    all_sign_corrected    = {}
    all_sign_corrected_bc = {}
    all_within_cat        = {}
    all_within_cat_bc     = {}
    all_alignment         = {}
    all_pred_stats        = []
    all_cat_validity      = {}
    all_delta_heatmaps    = {}
    all_delta_heatmaps_bc = {}

    for scale in available_scales:
        if is_merge_only:
            (sc, sc_bc, wc, wc_bc, align,
             pred_stat, cat_validity, dh, dh_bc) = _load_scale_data_multi(
                args.output_dir, args.model_type, scale, scale_sources)
        else:
            src_dir = os.path.join(args.output_dir, args.model_type)
            sc    = load_scale_consistency(src_dir, scale, 'all_pairs')
            sc_bc = load_scale_consistency(src_dir, scale, 'both_correct')
            wc    = load_within_cat_consistency(src_dir, scale, 'all_pairs')
            wc_bc = load_within_cat_consistency(src_dir, scale, 'both_correct')
            align = load_scale_alignment(src_dir, scale)

            pred_stat = None
            pred_path = os.path.join(src_dir, 'json', f'pred_stats_{scale}.json')
            if os.path.exists(pred_path):
                with open(pred_path) as f:
                    pred_stat = json.load(f)

            cat_validity = None
            cv_path = os.path.join(src_dir, 'json', f'category_validity_{scale}.json')
            if os.path.exists(cv_path):
                with open(cv_path) as f:
                    cat_validity = json.load(f)

            dh    = load_delta_heatmaps(src_dir, scale, 'all_pairs')
            dh_bc = load_delta_heatmaps(src_dir, scale, 'both_correct')

        if sc:
            all_sign_corrected[scale] = sc
        if sc_bc:
            all_sign_corrected_bc[scale] = sc_bc
        if wc:
            all_within_cat[scale] = wc
        if wc_bc:
            all_within_cat_bc[scale] = wc_bc
        if align:
            all_alignment[scale] = align
        if pred_stat is not None:
            all_pred_stats.append(pred_stat)
        if cat_validity is not None:
            all_cat_validity[scale] = cat_validity
        if dh:
            all_delta_heatmaps[scale] = dh
        if dh_bc:
            all_delta_heatmaps_bc[scale] = dh_bc

        logger.info(f"  Loaded data for '{scale}'"
                    + (f" (from '{scale_sources[scale]}')" if is_merge_only else ""))

    # ── Cross-scale plots ─────────────────────────────────────────────────────
    for condition, sc_data, wc_data, dh_data, tag_label in [
        ('all',          all_sign_corrected,    all_within_cat,    all_delta_heatmaps,    'all pairs'),
        ('both_correct', all_sign_corrected_bc, all_within_cat_bc, all_delta_heatmaps_bc, 'both-correct'),
    ]:
        cond_dir = os.path.join(plots_dir, condition)
        os.makedirs(cond_dir, exist_ok=True)

        if len(sc_data) > 1:
            plot_cross_scale_consistency(
                sc_data, args.model_type,
                os.path.join(cond_dir, 'cross_scale_sign_corrected.png'),
                title_prefix=f'Sign-Corrected ({tag_label})')

        if len(wc_data) > 1:
            plot_cross_scale_within_cat_consistency(
                wc_data, args.model_type,
                os.path.join(cond_dir, 'cross_scale_within_cat.png'))

        if dh_data:
            plot_delta_trajectory(
                dh_data, args.model_type,
                os.path.join(cond_dir, 'delta_trajectory.png'))

    # ── Alignment and prediction stats ────────────────────────────────────────
    all_cond_dir = os.path.join(plots_dir, 'all')
    os.makedirs(all_cond_dir, exist_ok=True)

    if len(all_alignment) > 1:
        plot_cross_scale_alignment(
            all_alignment, args.model_type,
            os.path.join(all_cond_dir, 'cross_scale_alignment.png'))

    if all_pred_stats:
        plot_pred_stats_bars(
            all_pred_stats, args.model_type,
            os.path.join(all_cond_dir, 'pred_stats_bars.png'))
        plot_pred_stats_trajectory(
            all_pred_stats, args.model_type,
            os.path.join(all_cond_dir, 'pred_stats_trajectory.png'))

    if all_sign_corrected:
        plot_summary_barplot(
            all_sign_corrected, all_alignment, args.model_type,
            os.path.join(all_cond_dir, 'summary_barplot.png'))

    # ── Summary CSV ───────────────────────────────────────────────────────────
    summary_rows = []
    for scale in available_scales:
        ps = next((p for p in all_pred_stats if p.get('scale') == scale), None)
        if ps is None:
            continue
        row = dict(ps)
        if scale in all_alignment:
            max_layer = max(all_alignment[scale].keys())
            row['alignment_deepest'] = all_alignment[scale][max_layer]['per_sample_mean']
            row['alignment_perm']    = all_alignment[scale][max_layer]['permutation_mean']
        summary_rows.append(row)
    if summary_rows:
        csv_dir = os.path.join(out_dir, 'csv')
        os.makedirs(csv_dir, exist_ok=True)
        pd.DataFrame(summary_rows).to_csv(os.path.join(csv_dir, 'summary.csv'), index=False)

    # ── Accuracy charts ───────────────────────────────────────────────────────
    if all_pred_stats:
        acc_dir = os.path.join(plots_dir, 'accuracy')
        logger.info("\n--- Accuracy Charts ---")
        run_accuracy_charts(all_pred_stats, all_cat_validity, args.model_type, acc_dir)

    # ── Unify y-axis ──────────────────────────────────────────────────────────
    # For merge-only types, per-scale JSON files live in multiple source dirs,
    # so run_unify_ylim (which expects all JSON in one dir) is skipped.
    # The cross-scale comparison plots above already share a common y-axis.
    if not is_merge_only:
        logger.info("\n--- Unifying Y-axis ---")
        run_unify_ylim(out_dir, plots_dir, args.model_type)
    else:
        logger.info("\n--- Skipping y-axis unification (per-scale data spans multiple source dirs) ---")

    logger.info(f"\n=== Merge Complete ===\nResults saved to: {out_dir}")


# ============================================================================
# main
# ============================================================================

def main():
    parser = argparse.ArgumentParser(
        description='Swap Analysis — New Models (Molmo2 + Qwen3-VL)',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog=__doc__,
    )
    parser.add_argument('--data_path', type=str,
                        default='/data/shared/Qwen/EmbSpatial-Bench/EmbSpatial-Bench.tsv')
    parser.add_argument('--model_type', type=str, required=True,
                        choices=ALL_MODEL_TYPES,
                        help=(
                            'Runnable: molmo_big | qwen_big | qwen_super | big_trio\n'
                            'Merge-only (--merge required): molmo_all | qwen_all'
                        ))
    parser.add_argument('--scales', type=str, nargs='+', default=None,
                        help='Scales to process (default: all for the given model_type). '
                             'For merge-only types, controls which scales are included in the merge.')
    parser.add_argument('--output_dir', type=str,
                        default='/data/shared/Qwen/experiments/swap_analysis/results',
                        help='Root results directory.')
    parser.add_argument('--device', type=str, default='cuda')
    parser.add_argument('--seed', type=int, default=42)
    parser.add_argument('--merge', action='store_true',
                        help='Merge mode: generate cross-scale plots from saved per-scale data.')
    parser.add_argument('--skip-cross-group', action='store_true',
                        help='Skip cross-group quad extraction.')
    parser.add_argument('--max-samples-per-category', type=int, default=200,
                        dest='max_samples_per_category')

    args = parser.parse_args()

    # ── Per-model-type log file ───────────────────────────────────────────────
    log_path = _setup_file_logging(args.model_type)
    logger.info(f"Logging to: {log_path}")

    # ── Validate: merge-only types require --merge ────────────────────────────
    if args.model_type in MERGE_ONLY_CONFIGS and not args.merge:
        parser.error(
            f"'{args.model_type}' is a merge-only type. Add --merge to run it.\n"
            f"  Example: python swap_analysis_new_models.py "
            f"--model_type {args.model_type} --merge"
        )

    # ── Default scales ────────────────────────────────────────────────────────
    if args.scales is None:
        if args.model_type in MERGE_ONLY_CONFIGS:
            args.scales = MERGE_ONLY_CONFIGS[args.model_type]['scale_order']
        else:
            args.scales = list(MODEL_CONFIGS_NEW[args.model_type].keys())

    np.random.seed(args.seed)
    torch.manual_seed(args.seed)
    random.seed(args.seed)

    if args.merge:
        logger.info("\n=== MERGE MODE ===")
        run_merge_new(args)
        return

    # ── Per-scale inference loop ──────────────────────────────────────────────
    logger.info("\n=== Loading & Creating Swap Pairs ===")
    swap_pairs = load_swap_pairs(args.data_path, args.seed)

    quads = []
    if not args.skip_cross_group:
        try:
            hf_cache = build_hf_bbox_cache()
            quads    = create_cross_group_quads(swap_pairs, hf_cache)
        except Exception as e:
            logger.warning(f"Cross-group setup failed: {e}. Skipping.")

    model_configs = MODEL_CONFIGS_NEW[args.model_type]
    for scale in args.scales:
        if scale not in model_configs:
            logger.warning(f"Scale '{scale}' not in config for '{args.model_type}', skipping.")
            continue

        _, model_path = model_configs[scale]
        if not model_path.startswith(('Qwen/', 'allenai/')) and not os.path.exists(model_path):
            logger.warning(f"Model path not found: {model_path}  (scale='{scale}'), skipping.")
            continue

        try:
            process_scale_new(args, scale, swap_pairs, quads)
        except Exception as e:
            logger.error(f"Failed {args.model_type} - {scale}: {e}")
            import traceback
            traceback.print_exc()
            continue

    logger.info(f"\n{'='*60}")
    logger.info("=== All scales complete ===")
    logger.info(f"Results: {os.path.join(args.output_dir, args.model_type)}")
    logger.info(f"{'='*60}")


if __name__ == '__main__':
    main()