from __future__ import annotations

import json
from datetime import datetime, timezone
from pathlib import Path
from typing import Any

from .bucket import RunPaths, read_json, read_text, write_json
from .eval_config import effective_eval_config
from .security import redact

_TERMINAL = {"success", "failed", "failure", "error", "cancelled", "manual", "stale"}


def _now() -> str:
    return datetime.now(timezone.utc).isoformat()


def _safe_segment(value: Any, default: str) -> str:
    cleaned = "".join(ch if ch.isalnum() or ch in {"-", "_"} else "-" for ch in str(value or "").strip())
    return cleaned.strip("-_") or default


def _eval_mount(cfg: dict[str, Any] | None = None) -> Path | None:
    cfg = cfg or effective_eval_config()
    if not cfg.get("enabled"):
        return None
    mount = Path(str(cfg.get("job_mount_path") or "/evals"))
    return mount


def _publish_status_path(paths: RunPaths) -> str:
    return f"{paths.root}/eval_publish_status.json"


def _should_attempt_publish(record: dict[str, Any], bundle_state: dict[str, Any] | None = None) -> bool:
    status = str(record.get("outcome", {}).get("status") or record.get("phase") or "").lower()
    state_status = str((bundle_state or {}).get("status") or "").lower()
    phase = str(record.get("phase") or "").lower()
    return status in _TERMINAL or state_status in _TERMINAL or phase in {"final", "failure"}


def maybe_publish_eval_record(
    run_id: str,
    *,
    bucket_source: str,
    token: str | None = None,
    state: dict[str, Any] | None = None,
    force: bool = False,
) -> dict[str, Any]:
    """Publish a run-local anonymized eval record to the operator archive.

    User Jobs write only ``runs/<run_id>/eval_record.json`` in the user's bucket.
    The ASF Space backend owns the private operator eval bucket mounted at
    ``/evals`` and copies the already-anonymized record there. This lets evals
    work for all users without giving their Jobs write access to the private
    operator bucket.
    """
    cfg = effective_eval_config()
    if not cfg.get("enabled"):
        return {"enabled": False, "published": False, "reason": "eval_archive_disabled"}
    mount = _eval_mount(cfg)
    if mount is None:
        return {"enabled": False, "published": False, "reason": "eval_archive_disabled"}
    if not mount.exists() or not mount.is_dir():
        return {"enabled": True, "published": False, "reason": "eval_mount_missing", "mount": str(mount)}
    if not mount.is_dir():
        return {"enabled": True, "published": False, "reason": "eval_mount_not_directory", "mount": str(mount)}

    paths = RunPaths(run_id, bucket_source=bucket_source)
    status_path = _publish_status_path(paths)
    if not force:
        prev = read_json(status_path, token=token) or {}
        if prev.get("published") and prev.get("schema_version") == "1.0":
            return {**prev, "enabled": True, "skipped": True, "reason": "already_published"}

    record = read_json(f"{paths.root}/eval_record.json", token=token) or {}
    if not record:
        return {"enabled": True, "published": False, "reason": "record_not_ready"}
    if not isinstance(record, dict):
        return {"enabled": True, "published": False, "reason": "invalid_record"}
    if not force and not _should_attempt_publish(record, state):
        return {"enabled": True, "published": False, "reason": "run_not_terminal"}

    privacy = record.get("privacy") if isinstance(record.get("privacy"), dict) else {}
    if privacy.get("generated_code_stored") or privacy.get("raw_prompts_stored") or privacy.get("tokens_stored"):
        return {"enabled": True, "published": False, "reason": "privacy_flags_rejected"}

    finished = str(record.get("finished_at") or record.get("started_at") or _now())
    day = finished[:10] if len(finished) >= 10 else _now()[:10]
    try:
        yyyy, mm, dd = day.split("-")
    except Exception:
        yyyy, mm, dd = _now()[:10].split("-")
    anon_run_id = _safe_segment(record.get("anonymous_run_id") or record.get("run_id_hash"), "unknown-run")
    dest_dir = mount / yyyy / mm / dd / anon_run_id
    dest_dir.mkdir(parents=True, exist_ok=True)
    dest = dest_dir / "eval_record.json"
    dest.write_text(json.dumps(record, indent=2, ensure_ascii=False, sort_keys=True) + "\n", encoding="utf-8")

    compact = read_text(f"{paths.root}/events_compact.jsonl", token=token)
    if not compact:
        timeline = record.get("timeline") if isinstance(record.get("timeline"), list) else []
        compact = "".join(json.dumps(item, ensure_ascii=False) + "\n" for item in timeline)
    if compact:
        (dest_dir / "events_compact.jsonl").write_text(compact, encoding="utf-8")

    report = {
        "schema_version": "1.0",
        "published": True,
        "published_at": _now(),
        "publish_mode": "backend",
        "archive_path": str(dest),
        "archive_relative_path": str(dest.relative_to(mount)),
        "eval_bucket_source": cfg.get("bucket_source") or "",
        "eval_bucket_path": cfg.get("bucket_path") or "evals",
        "mount": str(mount),
        "anonymous_run_id": anon_run_id,
    }
    try:
        write_json(status_path, report, token=token)
    except Exception as exc:  # noqa: BLE001
        report["status_write_warning"] = redact(str(exc))[:500]
    return {"enabled": True, **report}