#!/usr/bin/env python3
"""
migrate_rules_to_playbooks.py — 規則 → Playbook 遷移 CLI
=========================================================
將 alert_rules.yaml 中的 25 條規則遷移為 DRAFT Playbook，讓飛輪 RAG 有資料可查。

用法:
    # 預設 dry-run（只印計畫，不寫 DB）
    python scripts/migrate_rules_to_playbooks.py

    # 指定 yaml 路徑
    python scripts/migrate_rules_to_playbooks.py --yaml-path /path/to/alert_rules.yaml

    # 真實寫入 DB
    python scripts/migrate_rules_to_playbooks.py --commit

    # 完整選項
    python scripts/migrate_rules_to_playbooks.py --yaml-path alert_rules.yaml --commit

W1 PR-R1 — 規則 → Playbook 遷移
2026-04-28 ogt + Claude Sonnet 4.6
"""
from __future__ import annotations

import argparse
import asyncio
import os
import sys
from pathlib import Path

# 確保 apps/api/src 在 import path 中（從 scripts/ 執行時）
_SCRIPT_DIR = Path(__file__).parent
_API_ROOT = _SCRIPT_DIR.parent
sys.path.insert(0, str(_API_ROOT))

# 預設 yaml 路徑：相對 scripts/ 的上一層（apps/api/alert_rules.yaml）
_DEFAULT_YAML_PATH = _API_ROOT / "alert_rules.yaml"


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        description="將 alert_rules.yaml 遷移為 DRAFT Playbook（飛輪 RAG 冷啟動）",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
範例:
  python scripts/migrate_rules_to_playbooks.py              # dry-run（預設）
  python scripts/migrate_rules_to_playbooks.py --commit      # 真實寫入
  python scripts/migrate_rules_to_playbooks.py --yaml-path alert_rules.yaml --commit
        """,
    )
    parser.add_argument(
        "--yaml-path",
        type=Path,
        default=_DEFAULT_YAML_PATH,
        help=f"alert_rules.yaml 路徑（預設: {_DEFAULT_YAML_PATH}）",
    )
    parser.add_argument(
        "--commit",
        action="store_true",
        default=False,
        help="真實寫入 DB（預設 dry-run，僅印計畫）",
    )
    parser.add_argument(
        "--disable-flag",
        action="store_true",
        default=False,
        help="模擬 ENABLE_RULE_MIGRATION_DRAFT=false（測試 feature flag 關閉路徑）",
    )
    # 2026-04-29 ogt + Claude Opus 4.7: critic Major #2 修
    # --commit 寫 prod DB 必須二次確認，誤跑會在 prod 製造 25 筆 DRAFT
    parser.add_argument(
        "--yes",
        action="store_true",
        default=False,
        help="跳過 --commit 的二次確認 prompt（CI / 自動化用）",
    )
    return parser.parse_args()


async def _run(args: argparse.Namespace) -> int:
    """
    非同步主流程

    Returns:
        exit code (0=成功, 1=有錯誤)
    """
    from src.services.rule_to_playbook_migrator import migrate_yaml_rules_to_playbooks

    yaml_path: Path = args.yaml_path
    dry_run: bool = not args.commit
    enable_migration: bool = not args.disable_flag

    # 讀取 feature flag（環境變數優先，CLI flag 次之）
    env_flag = os.environ.get("ENABLE_RULE_MIGRATION_DRAFT", "").lower()
    if env_flag == "false":
        enable_migration = False

    print(f"\n{'[DRY-RUN] ' if dry_run else ''}規則 → Playbook 遷移")
    print(f"  yaml_path: {yaml_path}")
    print(f"  enable_migration: {enable_migration}")
    print(f"  dry_run: {dry_run}")
    print()

    if not yaml_path.exists():
        print(f"[ERROR] yaml 不存在: {yaml_path}", file=sys.stderr)
        return 1

    # 2026-04-29 critic Major #2 修：--commit 二次確認，--yes 跳過
    if not dry_run and not args.yes:
        ans = input(
            "⚠️  即將寫入 prod DB（最多 25 筆 DRAFT Playbook）\n"
            "    Type 'yes' to confirm (or 'n' to abort): "
        ).strip().lower()
        if ans != "yes":
            print("[ABORTED] 使用者取消（type 'yes' to confirm）", file=sys.stderr)
            return 1

    report = await migrate_yaml_rules_to_playbooks(
        yaml_path=yaml_path,
        dry_run=dry_run,
        enable_migration=enable_migration,
    )

    # 輸出報告
    print("=" * 60)
    print(report.summary())
    print("=" * 60)

    if report.created_names:
        action = "待建立" if dry_run else "已建立"
        print(f"\n{action} ({len(report.created_names)} 條):")
        for name in report.created_names:
            print(f"  + {name}")

    if report.skipped_names:
        print(f"\n已跳過（已存在）({len(report.skipped_names)} 條):")
        for name in report.skipped_names:
            print(f"  ~ {name}")

    if report.errors:
        print(f"\n[ERROR] 失敗 ({len(report.errors)} 條):", file=sys.stderr)
        for err in report.errors:
            print(f"  ! {err}", file=sys.stderr)

    if dry_run and report.created > 0:
        print(f"\n提示: 加 --commit 參數執行實際寫入（將建立 {report.created} 條 DRAFT Playbook）")

    return 1 if report.failed > 0 else 0


def main() -> None:
    args = parse_args()
    exit_code = asyncio.run(_run(args))
    sys.exit(exit_code)


if __name__ == "__main__":
    main()