from flask import Blueprint, request
from sqlalchemy import func, select

from extensions import db
from models import ShootingSession
from .utils import ok, serialize_session

feed_bp = Blueprint("api_feed", __name__, url_prefix="/feed")


@feed_bp.get("/")
def feed():
    try:
        page = max(1, int(request.args.get("page", 1)))
        per_page = min(100, max(1, int(request.args.get("per_page", 20))))
    except (TypeError, ValueError):
        page, per_page = 1, 20

    total = db.session.scalar(
        select(func.count()).select_from(ShootingSession)
        .where(ShootingSession.is_public == True)  # noqa: E712
    ) or 0

    sessions = db.session.scalars(
        select(ShootingSession)
        .where(ShootingSession.is_public == True)  # noqa: E712
        .order_by(ShootingSession.session_date.desc(), ShootingSession.created_at.desc())
        .offset((page - 1) * per_page)
        .limit(per_page)
    ).all()

    return ok({
        "data": [serialize_session(s, include_user=True) for s in sessions],
        "total": total,
        "page": page,
        "per_page": per_page,
    })