#!/usr/bin/env python3
"""
Lightweight scheduled job runner for DAARION operational tasks.

Calls tools directly (no gateway required) and saves output artifacts to
ops/reports/{cost,privacy,drift}/.

Usage:
    python3 ops/scripts/schedule_jobs.py daily_cost_digest
    python3 ops/scripts/schedule_jobs.py daily_privacy_digest
    python3 ops/scripts/schedule_jobs.py weekly_drift_full

Environment variables:
    REPO_ROOT       — root of repo (default: inferred from script location)
    AUDIT_BACKEND   — auto|jsonl|postgres (default: auto)
    DATABASE_URL    — PostgreSQL DSN (required for backend=postgres/auto with DB)
    AUDIT_JSONL_DIR — override JSONL audit dir

Exit codes: 0 = success, 1 = error
"""
from __future__ import annotations

import datetime
import json
import os
import sys
from pathlib import Path

# ── Resolve repo root ─────────────────────────────────────────────────────────
_HERE = Path(__file__).resolve().parent
REPO_ROOT = Path(os.getenv("REPO_ROOT", str(_HERE.parent.parent)))
sys.path.insert(0, str(REPO_ROOT / "services" / "router"))


def _today() -> str:
    return datetime.date.today().isoformat()


def _week_tag() -> str:
    d = datetime.date.today()
    return f"week-{d.isocalendar()[0]}-{d.isocalendar()[1]:02d}"


def _save_artifact(output_dir: Path, stem: str, data: dict) -> None:
    output_dir.mkdir(parents=True, exist_ok=True)
    json_path = output_dir / f"{stem}.json"
    md_path = output_dir / f"{stem}.md"
    with open(json_path, "w", encoding="utf-8") as fh:
        json.dump(data, fh, indent=2, ensure_ascii=False, default=str)
    markdown = data.get("markdown", "")
    if markdown:
        with open(md_path, "w", encoding="utf-8") as fh:
            fh.write(markdown)
    print(f"[schedule_jobs] Artifacts saved: {json_path}")
    if md_path.exists():
        print(f"[schedule_jobs] Markdown: {md_path}")


# ─── Task implementations ─────────────────────────────────────────────────────

def run_daily_cost_digest() -> int:
    print(f"[schedule_jobs] Running daily_cost_digest ({_today()})")
    try:
        from cost_analyzer import analyze_cost_dict  # type: ignore
        result = analyze_cost_dict("digest", params={
            "window_hours": 24,
            "baseline_hours": 168,
            "top_n": 10,
            "backend": os.getenv("AUDIT_BACKEND", "auto"),
        })
        output_dir = REPO_ROOT / "ops" / "reports" / "cost"
        _save_artifact(output_dir, _today(), result)
        anomalies = result.get("anomaly_count", 0)
        recs = result.get("recommendations") or []
        print(f"[schedule_jobs] Cost digest OK — anomalies={anomalies}, recs={len(recs)}")
        return 0
    except Exception as exc:
        print(f"[schedule_jobs] daily_cost_digest FAILED: {exc}", file=sys.stderr)
        return 1


def run_daily_privacy_digest() -> int:
    print(f"[schedule_jobs] Running daily_privacy_digest ({_today()})")
    try:
        from data_governance import scan_data_governance_dict  # type: ignore
        result = scan_data_governance_dict("digest_audit", params={
            "backend": os.getenv("AUDIT_BACKEND", "auto"),
            "time_window_hours": 24,
            "max_findings": 20,
        })
        output_dir = REPO_ROOT / "ops" / "reports" / "privacy"
        _save_artifact(output_dir, _today(), result)
        stats = result.get("stats") or {}
        print(
            f"[schedule_jobs] Privacy digest OK — "
            f"errors={stats.get('errors',0)}, warnings={stats.get('warnings',0)}"
        )
        return 0
    except Exception as exc:
        print(f"[schedule_jobs] daily_privacy_digest FAILED: {exc}", file=sys.stderr)
        return 1


def run_weekly_drift_full() -> int:
    tag = _week_tag()
    print(f"[schedule_jobs] Running weekly_drift_full ({tag})")
    try:
        from drift_analyzer import analyze_drift_dict  # type: ignore
        result = analyze_drift_dict({
            "categories": ["services", "openapi", "nats", "tools"],
            "drift_profile": "dev",
        })
        output_dir = REPO_ROOT / "ops" / "reports" / "drift"
        _save_artifact(output_dir, tag, result)
        stats = (result.get("data") or result).get("stats") or {}
        print(
            f"[schedule_jobs] Drift full OK — "
            f"errors={stats.get('errors',0)}, warnings={stats.get('warnings',0)}"
        )
        return 0
    except Exception as exc:
        print(f"[schedule_jobs] weekly_drift_full FAILED: {exc}", file=sys.stderr)
        return 1


# ─── Dispatch ─────────────────────────────────────────────────────────────────

TASKS = {
    "daily_cost_digest": run_daily_cost_digest,
    "daily_privacy_digest": run_daily_privacy_digest,
    "weekly_drift_full": run_weekly_drift_full,
}


def main() -> None:
    if len(sys.argv) < 2 or sys.argv[1] not in TASKS:
        print(f"Usage: {sys.argv[0]} <task>", file=sys.stderr)
        print(f"  Available tasks: {', '.join(TASKS)}", file=sys.stderr)
        sys.exit(1)
    task_name = sys.argv[1]
    sys.exit(TASKS[task_name]())


if __name__ == "__main__":
    main()