"""Initial data seed: schedules + servers + system settings"""
from datetime import datetime
from app.core.utils import now_tw, configure_timezone
from croniter import croniter
from sqlalchemy.orm import Session
from app.models.schedule import Schedule
from app.models.server import Server
from app.models.settings import SystemSettings


INITIAL_SCHEDULES = [
    {"id": 1, "name": "租戶檢查", "cron_timer": "0 */3 * * * *"},
    {"id": 2, "name": "帳號檢查", "cron_timer": "0 */3 * * * *"},
    {"id": 3, "name": "系統狀態", "cron_timer": "0 0 8 * * *"},
]

INITIAL_SERVERS = [
    {"id": 1, "name": "home", "ip_address": "10.1.0.254", "sort_order": 1,
     "description": "核心服務主機 (Ubuntu 24.04 / Dell Inspiron 3910)"},
    {"id": 2, "name": "小的NAS", "ip_address": "10.1.0.20", "sort_order": 2,
     "description": "資料庫主機 (Synology DS716+II / DSM 6.2.4)"},
    {"id": 3, "name": "大的NAS", "ip_address": "10.1.0.30", "sort_order": 3,
     "description": "儲存主機 (Synology DS920+ / DSM 7.3.2)"},
    {"id": 4, "name": "Porsche_KLI", "ip_address": "10.1.0.245", "sort_order": 4,
     "description": "開發環境 (ASUS MINIPC PN62 / Windows 11)"},
]


def _calc_next_run(cron_timer: str) -> datetime:
    # croniter: six-field cron (sec min hour day month weekday)
    cron = croniter(cron_timer, now_tw())
    return cron.get_next(datetime)


def seed_initial_data(db: Session) -> None:
    """Insert initial schedules and servers if not present."""
    for s in INITIAL_SCHEDULES:
        if not db.get(Schedule, s["id"]):
            db.add(Schedule(
                id=s["id"],
                name=s["name"],
                cron_timer=s["cron_timer"],
                status="Waiting",
                next_run_at=_calc_next_run(s["cron_timer"]),
            ))

    for sv in INITIAL_SERVERS:
        if not db.get(Server, sv["id"]):
            db.add(Server(**sv))

    # Seed default system settings (id=1)
    if not db.get(SystemSettings, 1):
        db.add(SystemSettings(id=1))

    db.commit()

    # Apply timezone from settings
    s = db.get(SystemSettings, 1)
    if s:
        configure_timezone(s.timezone)