"""Galerie publique — accessible sans authentification."""

import logging

from fastapi import APIRouter, Request, Query
from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse
from fastapi.templating import Jinja2Templates
from pathlib import Path

logger = logging.getLogger(__name__)
router = APIRouter()

_templates = Jinja2Templates(directory=Path(__file__).parent.parent.parent / "frontend" / "templates")


@router.get("/", response_class=HTMLResponse)
async def index(request: Request):
    """Page d'accueil → redirige vers la galerie publique."""
    return RedirectResponse(url="/gallery")


@router.get("/gallery", response_class=HTMLResponse)
async def gallery_page(request: Request):
    cfg = request.app.state.config
    if not cfg.gallery.public_enabled:
        return HTMLResponse("<h1>Galerie désactivée</h1>", status_code=403)
    return _templates.TemplateResponse("public/gallery.html", {"request": request, "config": cfg})


@router.get("/api/gallery/photos")
async def api_gallery_photos(
    request: Request,
    page: int = Query(default=1, ge=1),
    limit: int = Query(default=24, ge=1, le=100),
):
    """Liste des photos depuis photobooth-app (paginée)."""
    pb = request.app.state.photobooth_service
    cfg = request.app.state.config

    all_photos = await pb.get_media_collection(limit=500)

    # Filtre sur les images uniquement
    photos = [p for p in all_photos if _is_image(p)]

    total = len(photos)
    start = (page - 1) * limit
    end = start + limit
    page_photos = photos[start:end]

    # Enrichit avec les URLs
    for p in page_photos:
        pid = _get_id(p)
        p["full_url"] = pb.media_url(pid)
        p["thumb_url"] = pb.thumbnail_url(pid)
        p["download_url"] = f"/api/gallery/download/{pid}"

    return {
        "photos": page_photos,
        "total": total,
        "page": page,
        "pages": max(1, (total + limit - 1) // limit),
    }


@router.get("/api/gallery/download/{photo_id}")
async def download_photo(request: Request, photo_id: str):
    """Redirige vers le fichier full-res sur photobooth-app."""
    pb = request.app.state.photobooth_service
    return RedirectResponse(url=pb.media_url(photo_id))


def _is_image(item: dict) -> bool:
    t = item.get("type", item.get("mediaitem_type", "image"))
    return str(t).lower() in ("image", "still", "photo")


def _get_id(item: dict) -> str:
    return str(item.get("id", item.get("filename", item.get("uid", ""))))