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"""SANDBOX trie visualization: build the n100 execution trie over canonical

train + test + synthetic + the 51 temp merged injections, and emit into the

sandbox out/ folder:

  - trie_after.txt        full highlighted text tree

  - trie_targets.txt      focused before/after view of the 5 fix-target nodes

  - trie_after.png/.svg   rendered image (if Graphviz is installed)

Read-only w.r.t. canonical data.



Run from repo root:  python -u temp/injection_sandbox/viz_trie.py

"""
from __future__ import annotations

import json
import sys
from collections import Counter
from pathlib import Path

ROOT = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(ROOT))
sys.path.insert(0, str(ROOT / "systemUpgrade"))

from pipeline import load_examples                       # noqa: E402
from trie.builder import build_trie                      # noqa: E402
from scripts.visualize_distractor_trie import _render_image  # noqa: E402

SAND = Path(__file__).resolve().parent
OUT = SAND / "out"
EXP = ROOT / "data" / "tau-2" / "processed_distractor_exp2"
N100 = EXP / "n100"
MERGED = OUT / "_staging_merged_injections.jsonl"

TARGETS = {
    "N1": ["find_user_id_by_email"],
    "N2": ["find_user_id_by_email", "get_user_details"],
    "N3": ["modify_pending_order_items"],
    "N4": ["find_user_id_by_name_zip", "get_user_details",
           "get_order_details", "get_order_details",
           "get_order_details", "get_order_details"],
    "N5": ["find_user_id_by_name_zip", "get_order_details"],
}

manifest = json.loads((N100 / "apis.manifest.json").read_text(encoding="utf-8"))
REAL, CONF, DUMMY = set(manifest.get("real", [])), set(manifest.get("confuser", [])), set(manifest.get("dummy", []))


def cls(name):
    return "REAL" if name in REAL else "conf" if name in CONF else "dummy" if name in DUMMY else "?"


def build(with_merged):
    ex = load_examples(EXP / "train.jsonl") + load_examples(EXP / "test.jsonl")
    ex += load_examples(N100 / "synthetic_trajectories.jsonl")
    if with_merged:
        ex += load_examples(MERGED)
    return build_trie(ex)


def target_view(trie):
    lines = []
    for name, path in TARGETS.items():
        node = trie.traverse(tuple(path))
        lines.append(f"\n{name}  {' > '.join(path)}")
        if node is None or node.total_child_count() == 0:
            lines.append("   (absent)")
            continue
        probs = node.transition_probs()
        for nm in sorted(node.children, key=lambda n: -probs[n]):
            tag = cls(nm)
            mark = ">>" if tag == "REAL" else "  "
            lines.append(f"   {mark} [{tag:5}] {nm:32} p={probs[nm]:.3f}  count={node.children[nm].count}")
    return lines


def main():
    before, after = build(False), build(True)

    # focused before/after target view
    tv = ["FIX-TARGET NODES  (before vs after temp injection)", "=" * 70]
    tv.append("\n--- BEFORE ---")
    tv += target_view(before)
    tv.append("\n\n--- AFTER (with 51 merged injections) ---")
    tv += target_view(after)
    (OUT / "trie_targets.txt").write_text("\n".join(tv), encoding="utf-8")

    # full highlighted text tree (after)
    lines, node_cls, stats = [], Counter(), {"nodes": 0, "max_depth": 0}

    def render(node, depth):
        for child in sorted(node.children.values(), key=lambda c: (-c.count, c.api_name)):
            c = cls(child.api_name)
            node_cls[c] += 1
            stats["nodes"] += 1
            stats["max_depth"] = max(stats["max_depth"], depth + 1)
            ind = "    " * depth
            if c == "REAL":
                lines.append(f"{ind}>> REAL  {child.api_name}  (count={child.count})")
            else:
                lines.append(f"{ind}   [{c:5}] {child.api_name}  (count={child.count})")
            render(child, depth + 1)

    render(after.root, 0)
    header = [
        "EXP2 EXECUTION TRIE  (train + test + synthetic + 51 temp injections)",
        "=" * 70,
        f"trajectories: before={before.root.count}  after={after.root.count}  "
        f"(+{after.root.count - before.root.count})",
        f"trie nodes: {stats['nodes']}   max depth: {stats['max_depth']}",
        "nodes by class: " + "  ".join(f"{k}={node_cls[k]}" for k in ("REAL", "conf", "dummy", "?")),
        "Legend: '>> REAL' = real tau2 API;  [conf] = confuser;  [dummy] = off-domain",
        "=" * 70, "",
    ]
    (OUT / "trie_after.txt").write_text("\n".join(header + lines), encoding="utf-8")

    img = _render_image(after.root, cls, OUT / "trie_after", fmt="png")
    _render_image(after.root, cls, OUT / "trie_after", fmt="svg")

    print(f"trajectories before={before.root.count} after={after.root.count} (+{after.root.count-before.root.count})")
    print("wrote:", (OUT / 'trie_targets.txt').name, ",", (OUT / 'trie_after.txt').name,
          ("," + Path(img).name if img else "(no image: Graphviz not installed)"))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())