"""Fetch landing-page photos (one-time + re-runnable).

Downloads royalty-free originals (see SOURCES.md next to the photos),
resizes to max 1600px wide and stores them as WebP q80 in
frontend/public/photos/ (self-hosted: no hotlinking, no tracking).

Run in the api container (has network + Pillow):
    docker compose exec api /opt/venv/bin/python \\
        /srv/kirche-einfach/frontend/scripts/fetch-photos.py
"""

from __future__ import annotations

import sys
import urllib.request
from io import BytesIO
from pathlib import Path

try:
    from PIL import Image
except ImportError:
    sys.exit("Pillow required (present in the api image)")

ROOT = Path(__file__).resolve().parent.parent.parent
OUT = ROOT / "frontend" / "public" / "photos"


def pexels(photo_id: int) -> str:
    return (
        f"https://images.pexels.com/photos/{photo_id}/"
        f"pexels-photo-{photo_id}.jpeg?auto=compress&cs=tinysrgb&w=1600"
    )


PHOTOS = {
    # target file -> (direct file URL, source page for SOURCES.md)
    "hero-church.webp": (
        pexels(31630127),
        "https://www.pexels.com/photo/historic-church-with-bell-tower-in-germany-31630127/",
    ),
    "church-pews.webp": (
        pexels(7566207),
        "https://www.pexels.com/photo/church-pews-7566207/",
    ),
    "paperwork-desk.webp": (
        pexels(18687845),
        "https://www.pexels.com/photo/desk-with-documents-and-stamps-18687845/",
    ),
    "team-laptop.webp": (
        pexels(7793702),
        "https://www.pexels.com/photo/a-team-looking-at-a-laptop-7793702/",
    ),
    "pilot-meeting.webp": (
        pexels(5668858),
        "https://www.pexels.com/photo/two-people-shaking-hands-5668858/",
    ),
}


def fetch(url: str) -> bytes:
    req = urllib.request.Request(url, headers={"User-Agent": "kirche-einfach/1.0"})
    with urllib.request.urlopen(req, timeout=120) as response:
        return response.read()


def main() -> None:
    OUT.mkdir(parents=True, exist_ok=True)
    for filename, (url, _page) in PHOTOS.items():
        raw = fetch(url)
        with Image.open(BytesIO(raw)) as img:
            img = img.convert("RGB")
            if img.width > 1600:
                img = img.resize(
                    (1600, round(img.height * 1600 / img.width)), Image.LANCZOS
                )
            target = OUT / Path(filename).with_suffix(".webp").name
            img.save(target, "WEBP", quality=80, method=6)
            print(f"wrote {target} ({target.stat().st_size // 1024} KB)")


if __name__ == "__main__":
    main()