#!/usr/bin/env python3
"""
Finalize an externally executed NeMo/Nemotron replay batch.

This command is local and deterministic. It does not call NIM, NVIDIA APIs,
production tools, or LLMs. It consumes external JSONL that already exists, then
runs import -> contract -> normalize -> grade -> score -> promotion gate.
"""

from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path
from typing import Any


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

from src.services.agent_nemotron_replay_finalizer import (  # noqa: E402
    NemotronReplayFinalizerOutputs,
    finalize_nemotron_replay,
)
from src.services.agent_replacement_evaluator import (  # noqa: E402
    AgentReplayRecord,
)


def main() -> int:
    parser = argparse.ArgumentParser(
        description="Finalize NeMo/Nemotron external replay results."
    )
    parser.add_argument("--requests", required=True, help="NeMo request JSONL")
    parser.add_argument(
        "--external-results",
        required=True,
        help="agent_nemotron_external_result_v1 JSONL",
    )
    parser.add_argument("--inputs", required=True, help="candidate input JSONL")
    parser.add_argument("--fixtures", required=True, help="internal fixture JSONL")
    parser.add_argument("--baseline", required=True, help="OpenClaw baseline JSONL")
    parser.add_argument("--output-prefix", required=True, help="output path prefix")
    parser.add_argument(
        "--target-stage",
        default="shadow",
        choices=("shadow", "canary"),
        help="target promotion stage",
    )
    args = parser.parse_args()

    outputs = NemotronReplayFinalizerOutputs.from_prefix(Path(args.output_prefix))
    summary, artifacts = finalize_nemotron_replay(
        requests=_read_jsonl(Path(args.requests)),
        external_results=_read_jsonl(Path(args.external_results)),
        candidate_inputs=_read_jsonl(Path(args.inputs)),
        fixtures=_read_jsonl(Path(args.fixtures)),
        baseline_records=_read_replay_jsonl(Path(args.baseline)),
        target_stage=args.target_stage,
    )
    summary["inputs"] = {
        "requests": args.requests,
        "external_results": args.external_results,
        "candidate_inputs": args.inputs,
        "fixtures": args.fixtures,
        "baseline": args.baseline,
    }
    summary["outputs"] = outputs.to_dict()

    _write_json(outputs.import_report, summary["import_report"])
    if artifacts["candidate_raw"]:
        _write_jsonl(outputs.candidate_raw, artifacts["candidate_raw"])
    if summary.get("contract_report"):
        _write_json(outputs.contract_report, summary["contract_report"])
    if artifacts["normalized"]:
        _write_replay_jsonl(outputs.normalized_output, artifacts["normalized"])
    if artifacts["graded"]:
        _write_replay_jsonl(outputs.graded_output, artifacts["graded"])
    if summary.get("grading_report"):
        _write_json(outputs.grading_report, summary["grading_report"])
    if summary.get("scorecard"):
        _write_json(outputs.scorecard, summary["scorecard"])
    if summary.get("pipeline_report"):
        _write_json(outputs.pipeline_report, summary["pipeline_report"])
    if summary.get("promotion_gate"):
        _write_json(outputs.promotion_gate, summary["promotion_gate"])
    _write_json(outputs.summary, summary)

    print(json.dumps(summary, ensure_ascii=False, sort_keys=True))
    return 0 if summary["approved"] else 2


def _read_jsonl(path: Path) -> list[dict[str, Any]]:
    records: list[dict[str, Any]] = []
    with path.open(encoding="utf-8") as handle:
        for line_number, line in enumerate(handle, start=1):
            line = line.strip()
            if not line or line.startswith("#"):
                continue
            try:
                records.append(json.loads(line))
            except Exception as exc:
                raise SystemExit(f"{path}:{line_number}: invalid JSONL: {exc}") from exc
    return records


def _read_replay_jsonl(path: Path) -> list[AgentReplayRecord]:
    return [AgentReplayRecord.from_dict(payload) for payload in _read_jsonl(path)]


def _write_jsonl(path: Path, records: list[dict[str, Any]]) -> None:
    with path.open("w", encoding="utf-8") as handle:
        for record in records:
            handle.write(json.dumps(record, ensure_ascii=False, sort_keys=True))
            handle.write("\n")


def _write_replay_jsonl(path: Path, records: list[AgentReplayRecord]) -> None:
    with path.open("w", encoding="utf-8") as handle:
        for record in records:
            handle.write(json.dumps(record.__dict__, ensure_ascii=False, sort_keys=True))
            handle.write("\n")


def _write_json(path: Path, payload: dict[str, Any]) -> None:
    path.write_text(
        json.dumps(payload, ensure_ascii=False, indent=2, sort_keys=True) + "\n",
        encoding="utf-8",
    )


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