#!/usr/bin/env python3
"""Run lexical, flat-UQ and SSEG on identical public FinGovBench inputs.

The benchmark labels are never loaded. GPT-OSS-20B supplies one shared set of local
component-risk measurements per case. Flat-UQ and SSEG consume exactly those saved
measurements; only SSEG retains workflow dependencies. Lexical is model-free.
"""

from __future__ import annotations

import argparse
import concurrent.futures
import json
import os
import re
import time
from collections import defaultdict, deque
from pathlib import Path

import httpx


ROOT = Path(__file__).resolve().parents[1]
MODEL = os.getenv("FINGOVBENCH_MODEL", "meta-llama/Llama-3.3-70B-Instruct-Turbo")
BASE_URL = os.getenv("TOGETHER_BASE_URL", "https://api.together.xyz/v1")
ACTIONS = {"release", "withhold", "escalate", "retry", "repair", "rollback", "scoped_revalidation", "restrict", "suspend"}
AUDITABLE = {"configuration", "evidence", "claim", "claim_evidence_relation", "model", "tool", "workflow_state", "decision", "action", "control", "governance"}
TOKEN = re.compile(r"[a-z0-9]+")
LEXICAL_THRESHOLD = 0.08


def read_rows() -> list[dict]:
    rows: list[dict] = []
    for split in ("development", "validation", "test"):
        path = ROOT / f"hf/closed_loop_inputs/{split}.jsonl"
        for line in path.read_text().splitlines():
            if not line.strip():
                continue
            row = json.loads(line)
            forbidden = {"gold", "telemetry", "post_action_observation", "graph", "ddas"} & row.keys()
            if forbidden:
                raise RuntimeError(f"public-input leakage in {row.get('case_id')}: {sorted(forbidden)}")
            rows.append(row)
    return sorted(rows, key=lambda row: row["case_id"])


def compact_case(row: dict) -> dict:
    components = []
    for node in row["workflow"]["components"]:
        item = {"component_id": node["node_id"], "type": node["node_type"]}
        if "value" in node:
            item["value"] = node["value"]
        components.append(item)
    return {
        "case_id": row["case_id"],
        "domain": row["domain"],
        "as_of": row["as_of"],
        "workflow_context": row["workflow_context"],
        # Benchmark-construction fields such as ``controlled_fault`` are excluded.
        "event": {
            key: row["event"][key]
            for key in ("event_id", "description", "observed_at", "trigger_category")
            if key in row["event"]
        },
        "assurance_claims": row.get("assurance_claims", []),
        "red_line_controls": row.get("red_line_controls", []),
        "components": components,
    }


def parse_json_object(text: str) -> dict:
    """Parse a JSON object even when the model surrounds it with prose or a fence."""
    text = text.strip()
    try:
        value = json.loads(text)
    except json.JSONDecodeError:
        start, end = text.find("{"), text.rfind("}")
        if start < 0 or end <= start:
            raise ValueError("model response contained no JSON object")
        value = json.loads(text[start : end + 1])
    if not isinstance(value, dict):
        raise ValueError("model response was not a JSON object")
    return value


def call_model(row: dict, client: httpx.Client, retries: int = 4) -> dict:
    system = (
        "You are an independent component-risk monitor for a financial AI workflow. "
        "Use only the supplied record. Do not infer a gold answer. Return JSON with keys "
        "component_risk (object mapping every component_id to a number from 0 to 1), "
        "terminal_risk (0 to 1), and rationale (maximum 30 words). A component has high "
        "risk when the observed event invalidates its declared local contract."
    )
    last: Exception | None = None
    for attempt in range(retries):
        try:
            payload = {
                "model": MODEL,
                "messages": [
                    {"role": "system", "content": system},
                    {"role": "user", "content": json.dumps(compact_case(row), sort_keys=True)},
                ],
                "temperature": 0,
                "max_tokens": 700,
            }
            if MODEL.startswith("openai/gpt-oss"):
                payload["reasoning_effort"] = "low"
            provider_response = client.post("/chat/completions", json=payload)
            provider_response.raise_for_status()
            body = provider_response.json()
            parsed = parse_json_object(body["choices"][0]["message"]["content"])
            allowed = {node["node_id"] for node in row["workflow"]["components"]}
            risks = {
                str(key): min(1.0, max(0.0, float(value)))
                for key, value in parsed.get("component_risk", {}).items()
                if str(key) in allowed
            }
            for component_id in allowed:
                risks.setdefault(component_id, 0.0)
            return {
                "case_id": row["case_id"],
                "model": str(body.get("model") or MODEL),
                "component_risk": risks,
                "terminal_risk": min(1.0, max(0.0, float(parsed.get("terminal_risk", 0.0)))),
                "rationale": str(parsed.get("rationale", ""))[:300],
                "usage": body.get("usage", {}),
            }
        except httpx.HTTPStatusError as exc:
            detail = exc.response.text.replace("\n", " ")[:500]
            last = RuntimeError(f"{exc}; provider_response={detail}")
            time.sleep(2 ** attempt)
        except (httpx.HTTPError, TimeoutError, KeyError, ValueError, json.JSONDecodeError) as exc:
            last = exc
            time.sleep(2 ** attempt)
    raise RuntimeError(f"{row['case_id']} failed after {retries} attempts: {last}")


def create_measurements(rows: list[dict], output: Path, workers: int) -> dict[str, dict]:
    existing = {}
    if output.exists():
        existing = {item["case_id"]: item for item in map(json.loads, output.read_text().splitlines()) if item}
    pending = [row for row in rows if row["case_id"] not in existing]
    api_key = os.getenv("TOGETHER_API_KEY", "").strip()
    if pending and not api_key:
        raise SystemExit("TOGETHER_API_KEY is required")
    client = httpx.Client(
        base_url=BASE_URL.rstrip("/"),
        headers={"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"},
        timeout=120,
    )
    with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as pool:
        futures = {pool.submit(call_model, row, client): row["case_id"] for row in pending}
        for index, future in enumerate(concurrent.futures.as_completed(futures), 1):
            item = future.result()
            existing[item["case_id"]] = item
            if index % 10 == 0 or index == len(pending):
                output.parent.mkdir(parents=True, exist_ok=True)
                output.write_text("".join(json.dumps(existing[key], sort_keys=True) + "\n" for key in sorted(existing)))
                print(f"checkpoint {len(existing)}/{len(rows)}", flush=True)
    return existing


def components(row: dict) -> list[dict]:
    return row["workflow"]["components"]


def auditable_ids(row: dict) -> list[str]:
    return [node["node_id"] for node in components(row) if node["node_type"] in AUDITABLE]


def descendants(row: dict, starts: list[str]) -> list[str]:
    adjacency: dict[str, list[str]] = defaultdict(list)
    for edge in row["workflow"]["dependencies"]:
        adjacency[edge["source"]].append(edge["target"])
    seen, queue = set(starts), deque(starts)
    while queue:
        for child in adjacency[queue.popleft()]:
            if child not in seen:
                seen.add(child)
                queue.append(child)
    allowed = set(auditable_ids(row))
    return sorted(seen & allowed)


def typed_governance_roots(row: dict, alarms: list[str]) -> list[str]:
    """Map local alarms to the contract nodes that require governance review.

    Superseded evidence is immutable historical evidence, not itself a repair
    target.  Its typed successor affects the claim--source relation; review and
    revalidation therefore begin at that relation and continue downstream.
    Other workflows retain the locally alarmed components as their roots.
    """
    dependencies = row["workflow"]["dependencies"]
    superseded_targets = {
        edge["target"] for edge in dependencies if edge.get("edge_type") == "superseded_by"
    }
    if superseded_targets:
        relation_roots = {
            edge["target"]
            for edge in dependencies
            if edge["source"] in superseded_targets
            and edge.get("edge_type") == "contradicts_or_qualifies"
        }
        if relation_roots:
            return sorted(relation_roots)
    return alarms


def policy_action(row: dict, iceberg: bool) -> str:
    if not iceberg:
        return "release"
    trigger = row["event"]["trigger_category"]
    tier = row["workflow_context"]["authority_tier"]
    failed_red_line = any(c.get("status") == "failed" and not c.get("compensable", True) for c in row.get("red_line_controls", []))
    if failed_red_line:
        return "suspend"
    if trigger == "tool_permission":
        return "restrict" if tier.startswith("C") else "scoped_revalidation"
    if trigger == "incident_near_miss":
        return "withhold"
    if trigger in {"performance_behaviour", "model_vendor"}:
        return "escalate"
    if trigger == "prompt_policy_orchestration":
        return "withhold"
    if trigger == "purpose_population":
        return "scoped_revalidation"
    if trigger == "memory_data":
        if tier.startswith("A"):
            return "rollback"
        return "withhold" if row["domain"] == "market_data" else "scoped_revalidation"
    return "escalate"


def prediction(row: dict, method: str, affected: list[str], reviewed: list[str], iceberg: bool) -> dict:
    action = policy_action(row, iceberg)
    return {
        "case_id": row["case_id"],
        "method": method,
        "model": MODEL if method != "lexical" else None,
        "iceberg_detected": iceberg,
        "governance_action": action,
        "affected_components": sorted(set(affected)),
        "revalidation_components": sorted(set(reviewed)),
        "reviewed_components": sorted(set(reviewed)),
        "release_permitted": action == "release",
    }


def lexical(row: dict) -> dict:
    event_terms = set(TOKEN.findall(row["event"]["description"].lower()))
    scores = []
    for node in components(row):
        node_terms = set(TOKEN.findall(json.dumps(node.get("value", "")).lower()))
        score = len(event_terms & node_terms) / max(1, len(event_terms | node_terms))
        scores.append((score, node["node_id"]))
    score, component_id = max(scores)
    # A deliberately simple, label-blind baseline: flag only when event language
    # overlaps a component above the prespecified threshold. It never reads case
    # origin, controlled-fault metadata, or benchmark labels.
    iceberg = score >= LEXICAL_THRESHOLD
    affected = [component_id] if iceberg else []
    return prediction(row, "lexical", affected, affected, iceberg)


def derive_predictions(rows: list[dict], measurements: dict[str, dict], threshold: float, output_dir: Path) -> None:
    outputs = {"lexical": [], "flat_uq": [], "sseg": []}
    for row in rows:
        outputs["lexical"].append(lexical(row))
        risks = measurements[row["case_id"]]["component_risk"]
        alarms = sorted(component_id for component_id, value in risks.items() if value >= threshold)
        if not alarms and measurements[row["case_id"]]["terminal_risk"] >= threshold:
            alarms = [max(risks, key=risks.get)]
        iceberg = bool(alarms)
        all_components = auditable_ids(row) if iceberg else []
        outputs["flat_uq"].append(prediction(row, "flat_uq", all_components, all_components, iceberg))
        roots = typed_governance_roots(row, alarms) if iceberg else []
        propagated = descendants(row, roots) if iceberg else []
        outputs["sseg"].append(prediction(row, "sseg", propagated, propagated, iceberg))
    output_dir.mkdir(parents=True, exist_ok=True)
    for method, records in outputs.items():
        (output_dir / f"{method}.jsonl").write_text("".join(json.dumps(record, sort_keys=True) + "\n" for record in records))


def main() -> None:
    parser = argparse.ArgumentParser()
    parser.add_argument("--workers", type=int, default=8)
    parser.add_argument("--threshold", type=float, default=0.55)
    parser.add_argument("--limit", type=int)
    parser.add_argument("--case-origin", choices=("controlled", "genuine_revision"))
    parser.add_argument("--measurements", type=Path, default=ROOT / "results/gptoss20b_public_measurements.jsonl")
    parser.add_argument("--output-dir", type=Path, default=ROOT / "results/public_predictions")
    args = parser.parse_args()
    rows = read_rows()
    if args.case_origin:
        rows = [row for row in rows if row["case_origin"] == args.case_origin]
    if args.limit:
        rows = rows[: args.limit]
    measurements = create_measurements(rows, args.measurements, args.workers)
    derive_predictions(rows, measurements, args.threshold, args.output_dir)
    print(json.dumps({"cases": len(rows), "model": MODEL, "threshold": args.threshold, "methods": ["lexical", "flat_uq", "sseg"]}, indent=2))


if __name__ == "__main__":
    main()