"""
Build the knowledge-editing dataset from scene/object relation data.

Generates an edit_set.json that all KME methods (EasyEdit baselines + ours)
can consume.  The file is method-agnostic — each method reads the parts it
needs.

Supports any relation defined in experiment/config/relations.json.
Use --relation to select (default: bathroom_toilet).

The PRIMARY edit framing is captioning:
    Image + "Describe this image."
    old: "A bathroom with a toilet, sink, and mirror"  (hallucinated)
    new: "A bathroom with a sink and mirror"            (object removed)

The target for each edit instance is the original model's own caption with
object mentions surgically removed.  This is a minimal edit — the model's
style, vocabulary, and all correct content are preserved.

Pipeline:
    Step 1 (no GPU):  Build structure from CSV or HuggingFace
    Step 2 (GPU):     Generate original captions  →  clean them  →  fill targets

Usage:
    # HuggingFace dataset (default)
    python -m experiment.knowledge_editing.build_edit_set \
        --relation bathroom_toilet \
        --output experiment/knowledge_editing/edit_set.json

    # With a different relation
    python -m experiment.knowledge_editing.build_edit_set \
        --relation kitchen_microwave \
        --output experiment/knowledge_editing/edit_set_kitchen_microwave.json

    # Legacy CSV path
    python -m experiment.knowledge_editing.build_edit_set \
        --csv CC3M-Dataset/bathroom_filter/bathroom_toilet_labels.csv \
        --image_dir CC3M-Dataset/cc3m_images/train \
        --output experiment/knowledge_editing/edit_set.json
"""

import argparse
import csv
import json
import os
import random
import re
import sys
from typing import Optional

from experiment.config.relation_config import get_relation_config, RelationConfig
from experiment.data.hf_loader import HF_DATASET_ID, hf_rows as _hf_rows

# ---------------------------------------------------------------------------
# Constants — shared with training and evaluation pipelines
# ---------------------------------------------------------------------------

# Legacy CSV-only constants (kept for backward compatibility)
SPLIT_SEED = 42
SPLIT_TEST_SIZE = 0.2

# Default cap for evaluation set (per category, from HF val split)
DEFAULT_EVAL_PER_CATEGORY = 50

# Legacy defaults (bathroom_toilet). Overridden by RelationConfig at runtime.
CAPTION_PROMPT = "In this bathroom there is"

TRAIN_PROMPTS = [
    "In this bathroom there is",
]

GENERALITY_PROMPTS = [
    "This bathroom contains",
    "In this bathroom I can see",
    "The objects in this bathroom are",
]

TOILET_KEYWORDS = [
    "toilet", "toilets", "Toilet", "Toilets",
    "commode", "lavatory", "latrine",
]


def _build_object_re(keywords: list[str]) -> re.Pattern:
    """Build a regex that matches any of the given keywords (case-insensitive)."""
    return re.compile(
        r'\b(?:' + '|'.join(re.escape(k) for k in keywords) + r')s?\b',
        re.IGNORECASE,
    )


# Default regex (backward compat)
_TOILET_RE = _build_object_re(TOILET_KEYWORDS)


# ---------------------------------------------------------------------------
# Caption cleaning
# ---------------------------------------------------------------------------

def clean_object_mentions(text: str, object_re: re.Pattern = None) -> str:
    """Remove object mentions from a caption, cleaning up grammar artifacts.

    Args:
        text: Caption text to clean.
        object_re: Compiled regex matching the object keywords.
                   Defaults to _TOILET_RE for backward compat.
    """
    if object_re is None:
        object_re = _TOILET_RE
    cleaned = object_re.sub("", text)

    # Fix grammar artifacts from removal
    cleaned = re.sub(r'\ba\s+,', ',', cleaned)            # "a , sink" → ", sink"
    cleaned = re.sub(r',\s*,', ',', cleaned)               # ",, sink" → ", sink"
    cleaned = re.sub(r',\s*and\s*,', ',', cleaned)         # ", and ," → ","
    cleaned = re.sub(r',\s*\.', '.', cleaned)              # ",." → "."
    cleaned = re.sub(r'\.\s*\.', '.', cleaned)             # ".." → "."
    cleaned = re.sub(r'\bwith\s*,', 'with', cleaned)       # "with , sink" → "with sink"
    cleaned = re.sub(r'\bwith\s+and\b', 'with', cleaned)   # "with and sink" → "with sink"
    cleaned = re.sub(r'\band\s+and\b', 'and', cleaned)     # "and and" → "and"
    cleaned = re.sub(r'\ba\s+and\b', 'a', cleaned)         # "a and sink" → "a sink"
    cleaned = re.sub(r',\s+and\s*$', '', cleaned)          # trailing ", and"
    cleaned = re.sub(r',\s*$', '.', cleaned)               # trailing comma
    cleaned = re.sub(r'\s{2,}', ' ', cleaned)              # double spaces
    cleaned = cleaned.strip().strip(',').strip()

    return cleaned


def has_substance(text: str, min_words: int = 4) -> bool:
    """Check if a cleaned caption still has enough content to be useful."""
    words = text.split()
    return len(words) >= min_words


# ---------------------------------------------------------------------------
# CSV loading + category splitting
# ---------------------------------------------------------------------------

def load_csv(csv_path: str, image_dir: str) -> list[dict]:
    """Load dataset rows from a CSV + image directory (legacy path)."""
    rows = []
    missing = 0
    with open(csv_path, "r") as f:
        reader = csv.DictReader(f)
        for row in reader:
            image_path = os.path.join(image_dir, f"{row['image_id']}.jpg")
            if not os.path.exists(image_path):
                missing += 1
                continue
            rows.append({
                "image_id": row["image_id"],
                "bathroom": int(row.get("bathroom", 0)),
                "toilet": int(row.get("toilet", 0)),
                "image_path": image_path,
            })
    print(f"Loaded {len(rows)} rows from CSV ({missing} images missing)")
    return rows


def split_categories(rows, relation_config: RelationConfig = None):
    """Split rows into the four evaluation categories.

    Uses generic is_scene/has_object keys from hf_rows, or legacy
    bathroom/toilet keys from CSV loading.
    """
    if relation_config is not None:
        cat_names = relation_config.category_names
    else:
        cat_names = ["bathroom_no_toilet", "bathroom_with_toilet",
                     "non_bathroom_with_toilet", "unrelated"]

    cats = {name: [] for name in cat_names}

    for row in rows:
        # Support both generic (is_scene/has_object) and legacy (bathroom/toilet) keys
        b = row.get("is_scene", row.get("bathroom", 0))
        t = row.get("has_object", row.get("toilet", 0))
        if b == 1 and t == 0:
            cats[cat_names[0]].append(row)
        elif b == 1 and t == 1:
            cats[cat_names[1]].append(row)
        elif b == 0 and t == 1:
            cats[cat_names[2]].append(row)
        else:
            cats[cat_names[3]].append(row)

    for k, v in cats.items():
        print(f"  {k}: {len(v)}")
    return cats


def _csv_train_val_split(image_ids: list[str]):
    """Legacy 80/20 split for CSV-only path (no HF split info available)."""
    from sklearn.model_selection import train_test_split
    train_ids, val_ids = train_test_split(
        image_ids, test_size=SPLIT_TEST_SIZE, random_state=SPLIT_SEED,
    )
    return set(train_ids), set(val_ids)


# ---------------------------------------------------------------------------
# Target generation (requires GPU)
# ---------------------------------------------------------------------------

def generate_captions(
    image_sources: dict[str, object],
    model_name: str,
    prompt: str = CAPTION_PROMPT,
    device: str = "cuda",
    batch_size: int = 1,
    object_re: re.Pattern = None,
) -> dict[str, dict]:
    """Run the original LLaVA model to generate per-image captions.

    For each image, produces:
        original_caption:  what the unedited model says (may hallucinate object)
        cleaned_caption:   original with object mentions removed
        had_object:        whether the original mentioned the object
        is_usable:         whether the cleaned version has enough content

    Args:
        image_sources: dict mapping image_id → file path (str) or PIL.Image
        model_name:  HuggingFace model ID
        prompt:      the captioning prompt
        device:      cuda device
        object_re:   Compiled regex for matching object keywords.

    Returns:
        dict mapping image_id → {original, cleaned, had_toilet, is_usable}
    """
    if object_re is None:
        object_re = _TOILET_RE
    import torch
    from PIL import Image
    from transformers import AutoProcessor, AutoModelForPreTraining
    from tqdm import tqdm

    print(f"\nGenerating captions with {model_name} on {len(image_sources)} images...")
    processor = AutoProcessor.from_pretrained(model_name)
    model = AutoModelForPreTraining.from_pretrained(
        model_name, torch_dtype=torch.float16, device_map={"": device},
    )
    model.eval()

    results = {}
    items = list(image_sources.items())

    for image_id, source in tqdm(items, desc="Captioning"):
        try:
            if isinstance(source, str):
                image = Image.open(source).convert("RGB")
            else:
                image = source.convert("RGB")
        except Exception as e:
            print(f"  Skipping {image_id}: {e}")
            continue

        inputs = processor(
            images=image,
            text=f"<image>\nUSER: {prompt}\nASSISTANT:",
            return_tensors="pt",
        ).to(device)

        with torch.no_grad():
            output_ids = model.generate(
                **inputs, max_new_tokens=256, do_sample=False,
            )

        # Decode only generated tokens
        generated = processor.decode(
            output_ids[0][inputs["input_ids"].shape[1]:],
            skip_special_tokens=True,
        ).strip()

        cleaned = clean_object_mentions(generated, object_re=object_re)
        had_object = bool(object_re.search(generated))

        results[image_id] = {
            "original": generated,
            "cleaned": cleaned,
            "had_toilet": had_object,  # key kept for backward compat
            "is_usable": has_substance(cleaned),
        }

    del model
    torch.cuda.empty_cache()

    # Stats
    n_had_object = sum(1 for r in results.values() if r["had_toilet"])
    n_usable = sum(1 for r in results.values() if r["is_usable"])
    print(f"  Generated {len(results)} captions")
    print(f"  {n_had_object}/{len(results)} mentioned object (hallucinated)")
    print(f"  {n_usable}/{len(results)} usable after cleaning")

    return results


def generate_locality_captions(
    image_sources: dict[str, object],
    model_name: str,
    prompt: str = CAPTION_PROMPT,
    device: str = "cuda",
) -> dict[str, str]:
    """Generate original-model captions for locality images.

    These serve as the ground-truth reference for locality evaluation:
    the edited model's output on these images should match the original's.

    Args:
        image_sources: dict mapping image_id → file path (str) or PIL.Image
    """
    import torch
    from PIL import Image
    from transformers import AutoProcessor, AutoModelForPreTraining
    from tqdm import tqdm

    print(f"\nGenerating locality captions for {len(image_sources)} images...")
    processor = AutoProcessor.from_pretrained(model_name)
    model = AutoModelForPreTraining.from_pretrained(
        model_name, torch_dtype=torch.float16, device_map={"": device},
    )
    model.eval()

    results = {}
    for image_id, source in tqdm(image_sources.items(), desc="Locality captions"):
        try:
            if isinstance(source, str):
                image = Image.open(source).convert("RGB")
            else:
                image = source.convert("RGB")
        except Exception:
            continue

        inputs = processor(
            images=image,
            text=f"<image>\nUSER: {prompt}\nASSISTANT:",
            return_tensors="pt",
        ).to(device)

        with torch.no_grad():
            output_ids = model.generate(
                **inputs, max_new_tokens=256, do_sample=False,
            )

        generated = processor.decode(
            output_ids[0][inputs["input_ids"].shape[1]:],
            skip_special_tokens=True,
        ).strip()

        results[image_id] = generated

    del model
    torch.cuda.empty_cache()
    return results


# ---------------------------------------------------------------------------
# Build the edit set
# ---------------------------------------------------------------------------

def load_caption_targets(caption_targets_path: str,
                         relation_config: RelationConfig = None) -> tuple[dict, dict]:
    """Load pre-built caption targets from build_caption_targets.py.

    Returns:
        caption_data: {image_id: {"original": ..., "cleaned": ..., "had_toilet": ..., "is_usable": ...}}
        locality_captions: {image_id: original_caption_str}
    """
    efficacy_cat = relation_config.efficacy_category if relation_config else "bathroom_no_toilet"

    with open(caption_targets_path) as f:
        targets = json.load(f)

    caption_data = {}
    locality_captions = {}

    for iid, entry in targets["images"].items():
        cat = entry.get("category", "")
        original = entry.get("original_caption")

        if cat == efficacy_cat and original is not None:
            caption_data[iid] = {
                "original": original,
                "cleaned": entry.get("cleaned_caption"),
                "had_toilet": entry.get("had_toilet_mention_llm") or entry.get("had_toilet_mention_regex") or entry.get("had_toilet_mention", False),
                "is_hallucinating": entry.get("is_hallucinating", False),
                "is_usable": entry.get("is_usable", True),
            }
        elif original is not None:
            # Locality images — store original caption as ground truth
            locality_captions[iid] = original

    print(f"Loaded caption targets: {len(caption_data)} edit, "
          f"{len(locality_captions)} locality")
    return caption_data, locality_captions


def build_edit_set(
    csv_path: str = None,
    image_dir: str = None,
    dataset_id: str = HF_DATASET_ID,
    max_edit_instances: Optional[int] = None,
    max_locality_per_category: Optional[int] = None,
    max_eval_per_category: int = DEFAULT_EVAL_PER_CATEGORY,
    caption_data: Optional[dict] = None,
    locality_captions: Optional[dict] = None,
    n_seed_tries: int = 100,
    relation_config: RelationConfig = None,
):
    """Build the full edit set dictionary.

    Data sources:
      - HuggingFace (default): uses the dataset's official train/validation splits.
        edit_instances.train  = HF train split bathroom_no_toilet  (for LoRA etc.)
        eval_instances        = HF val split, up to max_eval_per_category per category
                                (for DualEdit: both editing and evaluation use these)
      - CSV (legacy): loads all rows then does a local 80/20 split.

    Args:
        csv_path: (Legacy) Path to bathroom_toilet_labels.csv
        image_dir: (Legacy) Image directory.
        dataset_id: HuggingFace dataset ID.
        max_edit_instances: Cap on edit_instances.train (HF train BNT images).
        max_locality_per_category: Cap on locality_instances (HF train non-BNT).
        max_eval_per_category: Cap per category for eval_instances (HF val). Default 50.
        caption_data: {image_id: {"original","cleaned","had_toilet","is_usable"}}
        locality_captions: {image_id: original_caption_str}
    """
    # Resolve category names
    efficacy_cat = relation_config.efficacy_category if relation_config else "bathroom_no_toilet"
    locality_cat_names = list(relation_config.locality_categories) if relation_config else [
        "bathroom_with_toilet", "non_bathroom_with_toilet", "unrelated"]

    if csv_path is not None and image_dir is not None:
        # ---- Legacy CSV path: local 80/20 split (no HF split available) ----
        rows = load_csv(csv_path, image_dir)
        cats = split_categories(rows, relation_config)

        bnt_ids = [r["image_id"] for r in cats[efficacy_cat]]
        train_ids, val_ids = _csv_train_val_split(bnt_ids)
        bnt_train = [r for r in cats[efficacy_cat] if r["image_id"] in train_ids]
        bnt_val   = [r for r in cats[efficacy_cat] if r["image_id"] in val_ids]
        if max_edit_instances:
            bnt_train = bnt_train[:max_edit_instances]
            bnt_val   = bnt_val[:max_edit_instances]

        locality_cats = cats
        eval_cats = None   # no separate eval set in CSV mode
        data_config = {"csv_path": csv_path, "image_dir": image_dir,
                       "split_seed": SPLIT_SEED, "split_test_size": SPLIT_TEST_SIZE}
    else:
        # ---- HuggingFace path: use official train/validation splits ----
        hf_kwargs = {}
        if relation_config is not None:
            hf_kwargs = {"scene_col": relation_config.scene_key,
                         "object_col": relation_config.object_key}

        print(f"Loading HuggingFace train split ({dataset_id})...")
        train_rows = _hf_rows(dataset_id, split="train", **hf_kwargs)
        print(f"Loading HuggingFace validation split ({dataset_id})...")
        val_rows   = _hf_rows(dataset_id, split="val", **hf_kwargs)

        print("\nTrain split categories:")
        train_cats = split_categories(train_rows, relation_config)
        print("Validation split categories:")
        val_cats   = split_categories(val_rows, relation_config)

        bnt_train = train_cats[efficacy_cat]
        if max_edit_instances:
            bnt_train = bnt_train[:max_edit_instances]

        # Val efficacy: take the first max_eval_per_category images deterministically.
        bnt_val_pool = val_cats[efficacy_cat]
        n_sample = min(max_eval_per_category, len(bnt_val_pool))
        bnt_val = bnt_val_pool[:n_sample]
        print(f"  Val {efficacy_cat}: first {n_sample} images (deterministic)")

        # Locality comes from the train split (no leakage from val)
        locality_cats = train_cats

        # Eval set: efficacy uses the same sample; other categories take first N from val
        eval_cats = {
            efficacy_cat: bnt_val,
            **{
                cat: val_cats[cat][:max_eval_per_category]
                for cat in locality_cat_names
            }
        }
        print(f"\nEval set (val split, ≤{max_eval_per_category} per category):")
        for cat, rows in eval_cats.items():
            print(f"  {cat}: {len(rows)}")

        data_config = {"dataset_id": dataset_id, "source": "huggingface",
                       "max_eval_per_category": max_eval_per_category}

    print(f"\nEdit instances: {len(bnt_train)} train, {len(bnt_val)} val")

    # ---- Build edit instances ----
    def make_edit_instance(row, split):
        iid = row["image_id"]
        inst = {
            "image_id": iid,
            "image_path": row.get("image_path", iid),
            "is_scene": row.get("is_scene", row.get("bathroom", 0)),
            "has_object": row.get("has_object", row.get("toilet", 0)),
            "split": split,
        }
        if caption_data and iid in caption_data:
            cd = caption_data[iid]
            inst["original_caption"] = cd["original"]
            inst["target"] = cd["cleaned"]
            inst["had_toilet"] = cd["had_toilet"]
            inst["is_usable"] = cd["is_usable"]
        else:
            inst["original_caption"] = None
            inst["target"] = None
            inst["had_toilet"] = None
            inst["is_usable"] = None
        return inst

    edit_train = [make_edit_instance(r, "train") for r in bnt_train]
    edit_val   = [make_edit_instance(r, "val")   for r in bnt_val]

    # ---- Build locality instances (from train split / CSV pool) ----
    locality = {}
    for cat_name in locality_cat_names:
        cat_rows = locality_cats[cat_name]
        if max_locality_per_category:
            cat_rows = cat_rows[:max_locality_per_category]
        locality[cat_name] = []
        for row in cat_rows:
            iid = row["image_id"]
            loc_inst = {
                "image_id": iid,
                "image_path": row.get("image_path", iid),
                "is_scene": row.get("is_scene", row.get("bathroom", 0)),
                "has_object": row.get("has_object", row.get("toilet", 0)),
                "original_caption": locality_captions.get(iid) if locality_captions else None,
            }
            locality[cat_name].append(loc_inst)

    # ---- Build eval instances (HF val split, all categories) ----
    def make_eval_instance(row):
        iid = row["image_id"]
        inst = {
            "image_id": iid,
            "image_path": row.get("image_path", iid),
            "is_scene": row.get("is_scene", row.get("bathroom", 0)),
            "has_object": row.get("has_object", row.get("toilet", 0)),
        }
        if caption_data and iid in caption_data:
            cd = caption_data[iid]
            inst["original_caption"] = cd["original"]
            inst["target"] = cd["cleaned"]
            inst["had_toilet"] = cd["had_toilet"]
            inst["is_usable"] = cd["is_usable"]
        elif locality_captions and iid in locality_captions:
            inst["original_caption"] = locality_captions[iid]
        return inst

    eval_instances = None
    if eval_cats is not None:
        eval_instances = {
            cat: [make_eval_instance(r) for r in rows]
            for cat, rows in eval_cats.items()
        }

    # ---- Stats ----
    all_edit = edit_train + edit_val
    n_with_targets = sum(1 for e in all_edit if e["target"] is not None)
    n_hallucinated = sum(1 for e in all_edit if e.get("had_toilet"))
    n_usable       = sum(1 for e in all_edit if e.get("is_usable"))

    # Resolve relation-specific values
    rc = relation_config
    object_keywords = rc.object_keywords if rc else TOILET_KEYWORDS
    caption_prompt = CAPTION_PROMPT
    train_prompts_list = rc.train_prompts if rc else TRAIN_PROMPTS
    generality_prompts_list = rc.generality_prompts if rc else GENERALITY_PROMPTS
    relation_key = rc.relation_key if rc else "bathroom_toilet"

    edit_set = {
        "edit_descriptor": {
            "relation": relation_key,
            "concept": f"{efficacy_cat}",
            "target_tokens": object_keywords,
            "edit_type": "caption_suppression",
            "edit_prompt": caption_prompt,
            "description": (
                f"For each {efficacy_cat} image, the model's caption "
                f"hallucinating the object is edited to the same caption with "
                f"object mentions removed."
            ),
        },
        "prompts": {
            "edit_prompt": caption_prompt,
            "train_prompts": train_prompts_list,
            "generality_prompts": generality_prompts_list,
        },
        "edit_instances": {
            "train": edit_train,   # HF train BNT — for LoRA / fine-tuning methods
            "val":   edit_val,     # HF val BNT   — same as eval_instances BNT
        },
        "locality_instances": locality,
        "stats": {
            "relation": relation_key,
            "n_edit_train": len(edit_train),
            "n_edit_val": len(edit_val),
            "n_with_targets": n_with_targets,
            "n_hallucinated": n_hallucinated,
            "n_usable": n_usable,
            **{f"n_locality_{cat}": len(insts) for cat, insts in locality.items()},
        },
        "data_config": data_config,
    }

    if eval_instances is not None:
        edit_set["eval_instances"] = eval_instances
        edit_set["stats"].update({
            f"n_eval_{cat}": len(insts)
            for cat, insts in eval_instances.items()
        })

    return edit_set


# ---------------------------------------------------------------------------
# Fill targets into an existing edit_set.json
# ---------------------------------------------------------------------------

def fill_targets(edit_set_path: str, model_name: str, device: str = "cuda"):
    """Generate caption targets and fill them into an existing edit_set.json."""

    with open(edit_set_path) as f:
        edit_set = json.load(f)

    # Collect all efficacy-category instances that need targets (edit + eval sets)
    efficacy_cat = edit_set.get("edit_descriptor", {}).get("concept", "bathroom_no_toilet")
    all_bnt = (
        edit_set["edit_instances"]["train"]
        + edit_set["edit_instances"]["val"]
        + edit_set.get("eval_instances", {}).get(efficacy_cat, [])
    )
    # Deduplicate by image_id
    seen = set()
    all_bnt_unique = []
    for inst in all_bnt:
        if inst["image_id"] not in seen:
            seen.add(inst["image_id"])
            all_bnt_unique.append(inst)

    need_targets = {
        inst["image_id"]: inst.get("image_path", inst["image_id"])
        for inst in all_bnt_unique
        if inst.get("target") is None
    }

    if not need_targets:
        print("All edit instances already have targets.")
        return edit_set

    # Generate captions
    caption_data = generate_captions(
        need_targets, model_name=model_name, device=device,
    )

    def _apply_caption(inst):
        iid = inst["image_id"]
        if iid in caption_data:
            cd = caption_data[iid]
            inst["original_caption"] = cd["original"]
            inst["target"] = cd["cleaned"]
            inst["had_toilet"] = cd["had_toilet"]
            inst["is_usable"] = cd["is_usable"]

    # Fill targets into edit_instances
    for split_name in ["train", "val"]:
        for inst in edit_set["edit_instances"][split_name]:
            _apply_caption(inst)

    # Fill targets into eval_instances efficacy category
    for inst in edit_set.get("eval_instances", {}).get(efficacy_cat, []):
        _apply_caption(inst)

    # Also generate locality captions if missing
    locality_need = {}
    for cat_name, instances in edit_set["locality_instances"].items():
        for inst in instances:
            if inst.get("original_caption") is None:
                locality_need[inst["image_id"]] = inst["image_path"]

    if locality_need:
        loc_captions = generate_locality_captions(
            locality_need, model_name=model_name, device=device,
        )
        for cat_name, instances in edit_set["locality_instances"].items():
            for inst in instances:
                if inst["image_id"] in loc_captions:
                    inst["original_caption"] = loc_captions[inst["image_id"]]

    # Update stats
    all_instances = edit_set["edit_instances"]["train"] + edit_set["edit_instances"]["val"]
    edit_set["stats"]["n_with_targets"] = sum(
        1 for e in all_instances if e.get("target") is not None
    )
    edit_set["stats"]["n_hallucinated"] = sum(
        1 for e in all_instances if e.get("had_toilet")
    )
    edit_set["stats"]["n_usable"] = sum(
        1 for e in all_instances if e.get("is_usable")
    )

    # Save back
    with open(edit_set_path, "w") as f:
        json.dump(edit_set, f, indent=2)
    print(f"\nUpdated {edit_set_path}")
    print(f"  {edit_set['stats']}")

    return edit_set


# ---------------------------------------------------------------------------
# CLI
# ---------------------------------------------------------------------------

def main():
    parser = argparse.ArgumentParser(description="Build KME edit set for captioning")

    # Relation selection
    parser.add_argument("--relation", type=str, default="bathroom_toilet",
                        help="Relation key from relations.json (default: bathroom_toilet)")

    # Step 1: build structure
    parser.add_argument("--csv", type=str, default=None,
                        help="(Legacy) Path to CSV. If omitted, loads from HuggingFace.")
    parser.add_argument("--image_dir", type=str, default=None,
                        help="(Legacy) Image directory. If omitted, loads from HuggingFace.")
    parser.add_argument("--dataset_id", type=str, default=None,
                        help="HuggingFace dataset ID (default: auto from relation config)")
    parser.add_argument("--output", type=str,
                        default="experiment/knowledge_editing/edit_set.json")
    parser.add_argument("--max_edit_instances", type=int, default=None,
                        help="Cap number of edit_instances.train (HF train BNT images)")
    parser.add_argument("--max_locality_per_category", type=int, default=50)
    parser.add_argument("--max_eval_per_category", type=int,
                        default=DEFAULT_EVAL_PER_CATEGORY,
                        help="Max images per category in eval_instances (HF val split). "
                             f"Default: {DEFAULT_EVAL_PER_CATEGORY}")
    parser.add_argument("--n_seed_tries", type=int, default=100,
                        help="Try this many random seeds for val BNT sampling and keep "
                             "the sample with the most hallucinating entries. Default: 1")

    # Pre-built caption targets (preferred — from build_caption_targets.py)
    parser.add_argument("--caption_targets", type=str, default=None,
                        help="Path to caption_targets.json from build_caption_targets.py. "
                             "If provided, skips inline caption generation entirely.")

    # Legacy: generate targets inline (needs GPU, prefer --caption_targets)
    parser.add_argument("--generate_targets", action="store_true",
                        help="[Legacy] Generate caption targets using regex cleaning. "
                             "Prefer --caption_targets for LLM-cleaned captions.")
    parser.add_argument("--model", type=str, default="llava-hf/llava-1.5-7b-hf",
                        help="Model for generating captions (original, pre-edit)")
    parser.add_argument("--device", type=str, default="cuda")

    # Alternative: fill targets into existing file
    parser.add_argument("--fill_targets", type=str, default=None,
                        help="Path to existing edit_set.json to fill targets into")

    args = parser.parse_args()

    # Mode: fill targets into existing file
    if args.fill_targets:
        fill_targets(args.fill_targets, model_name=args.model, device=args.device)
        return

    # Load relation config
    rc = get_relation_config(args.relation)
    dataset_id = args.dataset_id or rc.dataset_id
    object_re = _build_object_re(rc.object_keywords)

    print(f"Relation: {rc}")
    print(f"Dataset:  {dataset_id}")

    # Mode: build from scratch
    caption_data = None
    locality_captions = None

    if args.caption_targets:
        # Load from pre-built caption targets (LLM-cleaned)
        caption_data, locality_captions = load_caption_targets(args.caption_targets, relation_config=rc)
    elif args.generate_targets:
        # Legacy: inline generation with regex cleaning
        rows = load_csv(args.csv, args.image_dir, args.dataset_id)
        cats = split_categories(rows)

        # Generate captions for edit images — use PIL image or path
        edit_sources = {
            r["image_id"]: r.get("image_path") or r.get("image")
            for r in cats["bathroom_no_toilet"]
        }
        caption_data = generate_captions(
            edit_sources, model_name=args.model, device=args.device,
        )

        # Generate captions for locality images
        loc_sources = {}
        for cat_name in ["bathroom_with_toilet", "non_bathroom_with_toilet", "unrelated"]:
            for r in cats[cat_name][:args.max_locality_per_category]:
                loc_sources[r["image_id"]] = r.get("image_path") or r.get("image")
        locality_captions = generate_locality_captions(
            loc_sources, model_name=args.model, device=args.device,
        )

    edit_set = build_edit_set(
        csv_path=args.csv,
        image_dir=args.image_dir,
        dataset_id=dataset_id,
        max_edit_instances=args.max_edit_instances,
        max_locality_per_category=args.max_locality_per_category,
        max_eval_per_category=args.max_eval_per_category,
        caption_data=caption_data,
        locality_captions=locality_captions,
        n_seed_tries=args.n_seed_tries,
        relation_config=rc,
    )

    out_dir = os.path.dirname(os.path.abspath(args.output))
    os.makedirs(out_dir, exist_ok=True)
    with open(args.output, "w") as f:
        json.dump(edit_set, f, indent=2)
    print(f"\nEdit set saved to {args.output}")
    print(f"  {edit_set['stats']}")

    # eval_bnt_ids.json no longer needed — editing and evaluation both use
    # the first N images deterministically from the HF val split.


if __name__ == "__main__":
    main()