"""Роуты управления загрузками: создание, список, удаление."""

from __future__ import annotations

from fastapi import APIRouter, Depends, HTTPException, status

from app.api.deps import get_events, get_queue, get_storage
from app.core.events import EventBus
from app.core.queue import DownloadQueue
from app.core.storage import Storage
from app.models import CreateDownloads, Download, DownloadEvent

router = APIRouter(prefix="/api/downloads", tags=["downloads"])


@router.post("", status_code=status.HTTP_201_CREATED, response_model=list[Download])
async def create_downloads(
    payload: CreateDownloads,
    storage: Storage = Depends(get_storage),
    queue: DownloadQueue = Depends(get_queue),
    events: EventBus = Depends(get_events),
) -> list[Download]:
    """Принять ссылки (по одной на строку), создать задачи и поставить в очередь."""
    urls = [u.strip() for u in payload.urls if u.strip()]
    if not urls:
        raise HTTPException(status.HTTP_400_BAD_REQUEST, "Список ссылок пуст")

    created: list[Download] = []
    for url in urls:
        download = Download(url=url)
        await storage.create(download)
        await queue.add(download.id)
        await events.publish(DownloadEvent(type="created", download=download))
        created.append(download)
    return created


@router.get("", response_model=list[Download])
async def list_downloads(storage: Storage = Depends(get_storage)) -> list[Download]:
    """Список всех загрузок — для гидрации UI при загрузке страницы."""
    return await storage.list()


@router.delete("/{download_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_download(
    download_id: str,
    storage: Storage = Depends(get_storage),
    events: EventBus = Depends(get_events),
) -> None:
    deleted = await storage.delete(download_id)
    if not deleted:
        raise HTTPException(status.HTTP_404_NOT_FOUND, "Загрузка не найдена")
    await events.publish(DownloadEvent(type="deleted", id=download_id))