"""notify-send, every 60 seconds: seed the rules, note a new build, run the watch checks (at most every 15 minutes)
and deliver the events nobody has handled yet. Not pausable."""

from __future__ import annotations

import time as clock
from datetime import datetime

from ...feed.config import FeedSettings
from ...notify import seed as seed_rules
from ...notify import send, watch
from . import Counts, JobContext, JobSpec, directory, reload_departments

EVERY_SECONDS = 60
WATCH_SECONDS = 15 * 60
WATCH_KEY = "notify.watch_at"
BUILD_KEY = "notify.build_noted"


def _due(ctx: JobContext, key: str, seconds: float) -> bool:
    """True once per `seconds` per worker process; marks the time when it says so."""
    now = clock.monotonic()
    with ctx.stack.lock:
        last = ctx.stack.cache.get(key)
        if last is not None and now - float(last) < seconds:
            return False
        ctx.stack.cache[key] = now
    return True


def run(ctx: JobContext) -> Counts:
    conn, s = ctx.conn, ctx.settings
    counts: Counts = {}
    added = seed_rules(conn, s)
    if added:
        counts["seeded"] = len(added)
    if _due(ctx, BUILD_KEY, float("inf")):
        try:
            if watch.note_build(conn, s.ps_build) is not None:
                counts["version_deployed"] = s.ps_build
        except Exception as e:
            ctx.stack.drop(BUILD_KEY)  # try again on the next run
            ctx.error(f"version check: {type(e).__name__}", degrade=False)
    if _due(ctx, WATCH_KEY, WATCH_SECONDS):
        for name, check in (("drawings", watch.check_drawings), ("change orders", watch.check_change_orders)):
            try:
                counts.update(check(conn))
            except Exception as e:
                ctx.log.exception("watch check %s failed", name)
                ctx.error(f"watch {name}: {type(e).__name__}")
    pending = conn.execute(
        "SELECT EXISTS (SELECT 1 FROM notification_events WHERE dispatched_at IS NULL AND event_type IS NOT NULL)"
    ).fetchone()[0]
    if pending:
        reload_departments(conn)
        out = send.dispatch_pending(conn, s, directory(ctx))
        counts.update(out)
        if out.get("failed") or out.get("retry"):
            ctx.degrade(f"{out.get('failed', 0)} failed, {out.get('retry', 0)} waiting for the directory")
    return counts


def _cadence(_: FeedSettings, __: datetime) -> int:
    return EVERY_SECONDS


SPEC = JobSpec(name="notify-send", run=run, cadence=_cadence, pausable=False)