"""
Router "aggregate" provides:

- listing aggregate calendars
- finding aggregate calendars by name prefix
- getting aggregate calendar events by name prefix
"""

from logging import getLogger
from typing import Iterator

from fastapi import APIRouter, Depends

from ...core.caldav import CalDAV
from ...core.calevent import CalEvent
from ...core.config import Config, get_config
from ._common import LM_AGGREGATES, LM_CALENDARS

_logger = getLogger(__name__)

router = APIRouter(prefix="/aggregate", tags=["calendar"])


@router.on_event("startup")
async def start_router() -> None:
    _logger.debug(f"{router.prefix} router starting.")


@router.get(
    "/list",
    responses=LM_AGGREGATES.lister.responses,
)
async def list_aggregate_calendars(
    names: Iterator[str] = Depends(LM_AGGREGATES.lister.func),
) -> list[str]:
    return list(names)


@router.get(
    "/find/{prefix}",
    responses=LM_AGGREGATES.filter.responses,
)
async def find_aggregate_calendars(
    names: Iterator[str] = Depends(LM_AGGREGATES.filter.func),
) -> list[str]:
    return list(names)


@router.get(
    "/get/{prefix}",
    responses=LM_AGGREGATES.getter.responses,
)
async def get_aggregate_calendar(
    cfg: Config = Depends(get_config),
    name: str = Depends(LM_AGGREGATES.getter.func),
) -> list[CalEvent]:
    events: list[CalEvent] = []

    for cal_prefix in cfg.calendar.aggregates[name]:
        cal_name = await LM_CALENDARS.getter.func(cal_prefix)
        events.extend(await CalDAV.get_events(cal_name, cfg))

    return sorted(events)