"""Daily agent digest — "Your book this morning": one email per user, their queue only.

Delivery reuses the ONE sanctioned Odoo write path (modules/collections_send.py: mail.mail
create through the Office 365 relay) including its SAFE_MODE allow-list — while the guardrail
is ON no digest can leave the allow-list. Content rules (adoption canon, engagement-adoption
brief): ≤10 lines, only non-empty sections, every line deep-links back to the exact row
(?src=digest), and the email is SKIPPED entirely when there is nothing to act on — silence
keeps opens high. Internal mail: no model/res_id (these must NOT land in customer chatter).

Scheduling: app.py starts one daemon ticker (in the cache_resource singleton) that calls
run_due() every few minutes; run_due sends at most once per (weekday, user) after
DIGEST_UTC_HOUR (default 11:00 UTC = 7am ET in summer), idempotent across Space restarts via
the store key 'digest_log' (empty-skips are logged too, so a quiet day isn't rebuilt all day).

BU isolation carries into email: a single-BU user's digest is scoped to that BU's team_id.
"""
import os
import html as _html
import datetime as dt

import core.store as store
import core.users as users
import core.links as links
import modules.collections_send as cs
import modules.customer_data as md   # call-list / win-back queues (ex-myday, ex-customer_list)
import modules.tasks as tasks
import modules.customers as cust

KEY = 'digest_log'
UTC_HOUR = int(os.environ.get('DIGEST_UTC_HOUR', '11'))
WEEKDAYS_ONLY = os.environ.get('DIGEST_WEEKDAYS_ONLY', '1').strip().lower() \
    not in ('0', 'false', 'no', '')
ENABLED = os.environ.get('DIGEST_ENABLED', '1').strip().lower() not in ('0', 'false', 'no', '')

_NAVY, _GOLD, _MUTED = '#5B8FD9', '#D9A93A', '#6B7280'


def _team_for(user):
    """Single-BU users get a digest scoped to that BU — isolation carries into email."""
    bus = (user or {}).get('bus', 'all')
    if isinstance(bus, (list, tuple)) and len(bus) == 1:
        return bus[0]
    return None


def _m(x):
    try:
        return f"${float(x):,.0f}"
    except (TypeError, ValueError):
        return '—'


def _line(text, href, meta=''):
    t = _html.escape(str(text))
    m = f" <span style='color:{_MUTED}'>{_html.escape(str(meta))}</span>" if meta else ''
    return (f"<tr><td style='padding:6px 0;border-bottom:1px solid #ECEFF3;font-size:14px'>"
            f"<a href='{href}' style='color:{_NAVY};text-decoration:none;font-weight:600'>{t}</a>"
            f"{m}</td></tr>")


def _sec(title):
    return (f"<tr><td style='padding:14px 0 4px;font-size:12.5px;font-weight:700;"
            f"color:{_MUTED}'>{_html.escape(title)}</td></tr>")


def build(user, t=None):
    """(subject, html, n_actionable) for one user. n_actionable == 0 → skip the send."""
    t = t or dt.date.today()
    uname = user.get('username', '')
    agent = user.get('agent')
    team_id = _team_for(user)
    pids = md.agent_pids(agent)

    today = t.isoformat()
    my = [x for x in tasks.for_owner(uname)] if store.available() else []
    due = [x for x in my if (x.get('due') or '9999-12-31') <= today]
    q = md.queues(agent, team_id, limit=25)
    calls, risk = q['calls'][:5], q['risk'][:3]

    # yesterday's orders for the book (one read_group; skip silently on a transport error —
    # the digest must never fail because one section couldn't be pulled)
    yday = (t - dt.timedelta(days=1)).isoformat()
    y_rev = y_orders = 0
    try:
        rev_map = cust._cust_rev(yday, yday, team_id, pids)
        y_rev = sum(v.get('rev', 0.0) for v in rev_map.values())
        y_orders = sum(v.get('orders', 0) for v in rev_map.values())
    except Exception:
        pass

    n = len(due) + len(calls) + len(risk)
    if n == 0 and y_orders == 0:
        return None, None, 0

    rows = []
    if due:
        rows.append(_sec(f'Tasks due ({len(due)})'))
        for x in due[:5]:
            ent = x.get('entity') or {}
            href = links.deeplink('customer_data', src='digest')
            if ent.get('kind') and ent.get('id') is not None:
                href = links.deeplink('customer_data', ent['kind'], ent['id'], src='digest')
            meta = f"due {x.get('due') or '—'}"
            rows.append(_line(x.get('title', 'Task'), href, meta))
    if calls:
        rows.append(_sec('Call today — overdue vs their own cadence'))
        for r in calls:
            href = links.deeplink('customer_data', 'customer', r['pid'], src='digest')
            meta = (f"{int(r.get('overdue_days') or 0)}d past cycle · "
                    f"est. missed {_m(r.get('est_missed'))}")
            rows.append(_line(r.get('customer', '?'), href, meta))
    if risk:
        rows.append(_sec('Win-back — down vs last year'))
        for r in risk:
            href = links.deeplink('customer_data', 'customer', r['pid'], src='digest')
            meta = f"{_m(r.get('at_risk'))} at risk · {r.get('status', '')}"
            rows.append(_line(r.get('customer', '?'), href, meta))
    if y_orders:
        rows.append(_sec('Yesterday'))
        # Wave 16: the Sales page is retired (registry row archived) — yesterday's orders now
        # link to the Customer grid, the surface that carries the book. A link to an archived
        # page would fall through to the landing and read as a broken link.
        rows.append(_line(f"{y_orders} orders · {_m(y_rev)}",
                          links.deeplink('customer_data', src='digest')))

    scope = f"{agent}'s book" if agent else 'the whole book'
    list_url = links.deeplink('customer_data', src='digest')
    html_body = f"""
<div style='font-family:Calibri,Arial,sans-serif;color:#1A2332;max-width:600px;margin:0 auto'>
  <div style='border-top:3px solid {_GOLD};padding:16px 0 4px'>
    <div style='font-size:18px;font-weight:700;color:{_NAVY}'>Your book this morning</div>
    <div style='font-size:12px;color:{_MUTED}'>{t.strftime('%A, %B %d')} · {scope}</div>
  </div>
  <table style='width:100%;border-collapse:collapse'>{''.join(rows)}</table>
  <div style='padding:16px 0;font-size:13px'>
    <a href='{list_url}' style='color:{_NAVY};font-weight:700'>Open your Customer List →</a>
  </div>
  <div style='font-size:11px;color:{_MUTED};border-top:1px solid #ECEFF3;padding-top:8px'>
    Internal daily digest from Loopable.
    Sent only on days with something to act on.
  </div>
</div>"""
    subject = f"Your book this morning — {n} to act on · {t.strftime('%b %d')}"
    return subject, html_body, n


def send_one(user, odoo=None, override_to=None):
    """Build + queue one digest. Returns a short result string (never raises past itself)."""
    to = override_to or user.get('email')
    if not to:
        return 'no-email'
    subject, body, n = build(user)
    if n == 0:
        return 'empty-skip'
    if not cs.safe_recipient_ok(to):
        return 'safe-mode-blocked'
    odoo = odoo or cs.Odoo()
    mid = odoo.queue_mail({
        'subject': subject, 'body_html': body,
        'email_to': to, 'email_from': cs.SENDER_DISPLAY, 'reply_to': cs.REPLY_TO,
        'mail_server_id': cs.ROYAL_MAIL_SERVER_ID, 'author_id': cs.ROYAL_AUTHOR_ID,
        'state': 'outgoing', 'auto_delete': False,
        # This Odoo runs the custom rt_multi_dba module whose mail-create hook browses
        # env[mail.model].browse(mail.res_id) — a mail WITHOUT model/res_id crashes with
        # KeyError: False (verified 2026-07-05). Anchor internal mail on the house partner
        # (Royal Imports, cs.ROYAL_AUTHOR_ID) so nothing lands in a CUSTOMER's chatter.
        'model': 'res.partner', 'res_id': cs.ROYAL_AUTHOR_ID,
    })
    return f'queued:{mid}'


def run_due(force_user=None, override_to=None):
    """The ticker entry point. Normal path: after UTC_HOUR on weekdays, send each active
    emailed user their digest at most once per day (dedup via digest_log, including
    empty-skips). force_user bypasses the schedule/dedup (the 'Send my digest now' button)
    but NEVER the SAFE_MODE guardrail; forced sends are not logged (the 7am run still runs)."""
    if not store.available():
        return {}
    now = dt.datetime.utcnow()
    today = now.date().isoformat()
    if force_user is None:
        if not ENABLED:
            return {}
        if WEEKDAYS_ONLY and now.weekday() >= 5:
            return {}
        if now.hour < UTC_HOUR:
            return {}
    try:
        reg = users.registry()
    except Exception:
        return {}
    already = (store.get(KEY) or {}).get(today, {}) if force_user is None else {}
    results = {}
    odoo = None
    for un, u in sorted(reg.items()):
        if force_user is not None and un != force_user:
            continue
        if not u.get('active', True) or not u.get('email'):
            continue
        if force_user is None and un in already:
            continue
        pub = users._public(un, u)
        try:
            if odoo is None:
                odoo = cs.Odoo()
            results[un] = send_one(pub, odoo, override_to=override_to)
        except cs.SafeModeBlocked:
            results[un] = 'safe-mode-blocked'
        except Exception as e:
            results[un] = f'error:{str(e)[:80]}'
    if force_user is None and results:
        stamp = now.strftime('%H:%M')

        def _rec(d):
            day = d.setdefault(today, {})
            for un, r in results.items():
                day[un] = {'at': stamp, 'result': r}
            return d
        try:
            store.update(KEY, _rec)
        except Exception:
            pass
    return results


def today_log():
    return (store.get(KEY) or {}).get(dt.date.today().isoformat(), {})