"""Mail plugin — IMAP/SMTP, threading, templates, rules, PGP, delegates."""

from __future__ import annotations

import asyncio
import logging
from typing import Any

from app.plugins.base import BasePlugin
from app.plugins.manifest import PluginManifest, PluginRouteDef

logger = logging.getLogger(__name__)


async def _auto_sync_loop() -> None:
    """Background loop: process pending sync queue, then sync all active mail accounts every 5 minutes."""
    from app.plugins.builtins.mail.services import auto_sync_all_accounts, process_sync_queue
    from app.core.db import get_session_factory

    while True:
        try:
            factory = get_session_factory()
            async with factory() as db:
                await process_sync_queue(db)
                await db.commit()
        except Exception as exc:
            logger.warning("process_sync_queue error: %s", exc)
        try:
            await auto_sync_all_accounts()
        except Exception as exc:
            logger.warning("auto_sync error: %s", exc)
        await asyncio.sleep(60)


class MailPlugin(BasePlugin):
    """Mail plugin for email management: IMAP sync, SMTP send, threading, rules, PGP."""

    _auto_sync_task: asyncio.Task | None = None

    manifest = PluginManifest(
        name="mail",
        version="1.3.0",
        display_name="Mail",
        description=(
            "Email management: IMAP sync, SMTP send, threading, "
            "templates, rules, vacation, PGP, delegates, labels."
        ),
        dependencies=[],
        routes=[
            PluginRouteDef(
                path="/api/v1/mail",
                module="app.plugins.builtins.mail.routes",
                router_attr="router",
            ),
        ],
        events=[],
        migrations=["0001_initial.sql", "0006_flag_type.sql", "0007_sync_queue.sql", "0008_sync_queue_deleted_at.sql"],
        permissions=["mail:read", "mail:send", "mail:config", "mail:share", "mail:write", "mail:delete"],
    )

    async def on_activate(
        self, db, service_container, event_bus
    ) -> None:
        """Activate plugin: register events + start auto-sync background task."""
        await super().on_activate(db, service_container, event_bus)

        if self._auto_sync_task is None or self._auto_sync_task.done():
            self._auto_sync_task = asyncio.create_task(_auto_sync_loop())
            logger.info("Mail plugin: auto-sync background task started")

    def get_notification_types(self) -> list[dict[str, Any]]:
        """Return the notification types this mail plugin registers."""
        return [
            {"type_key": "mail_new", "category": "mail", "label": "Neue E-Mail empfangen", "description": "Benachrichtigung bei neuen E-Mails", "is_enabled_by_default": True},
            {"type_key": "mail_error", "category": "mail", "label": "IMAP-Verbindungsfehler", "description": "Fehler bei der Verbindung zum Mailserver", "is_enabled_by_default": True},
            {"type_key": "mail_auth", "category": "mail", "label": "IMAP-Login-Fehler", "description": "Anmeldung am Mailserver fehlgeschlagen", "is_enabled_by_default": True},
            {"type_key": "mail_quota", "category": "mail", "label": "Postfach fast voll", "description": "Warnung bei hohem Postfach-Füllstand", "is_enabled_by_default": True},
            {"type_key": "mail_sync_error", "category": "mail", "label": "Sync-Fehler", "description": "Synchronisierung fehlgeschlagen", "is_enabled_by_default": True},
            {"type_key": "mail_sent", "category": "mail", "label": "E-Mail gesendet", "description": "Bestätigung beim Senden einer E-Mail", "is_enabled_by_default": False},
            {"type_key": "mail_send_error", "category": "mail", "label": "SMTP-Sendefehler", "description": "E-Mail konnte nicht gesendet werden", "is_enabled_by_default": True},
            {"type_key": "mail_draft", "category": "mail", "label": "Entwurf gespeichert", "description": "Bestätigung beim Speichern eines Entwurfs", "is_enabled_by_default": False},
            {"type_key": "mail_account", "category": "mail", "label": "Account deaktiviert", "description": "Warnung bei deaktiviertem Mail-Account", "is_enabled_by_default": True},
            {"type_key": "mail_folder", "category": "mail", "label": "Ordner erstellt/gelöscht", "description": "Bestätigung bei Ordner-Operationen", "is_enabled_by_default": False},
        ]

    async def on_deactivate(
        self, db, service_container, event_bus
    ) -> None:
        """Deactivate plugin: stop auto-sync task + unregister events."""
        if self._auto_sync_task is not None and not self._auto_sync_task.done():
            self._auto_sync_task.cancel()
            try:
                await self._auto_sync_task
            except asyncio.CancelledError:
                pass
            self._auto_sync_task = None
            logger.info("Mail plugin: auto-sync background task stopped")

        await super().on_deactivate(db, service_container, event_bus)