import json

from fastapi import APIRouter, Depends, Query
from sqlalchemy import text

from .db import get_db
from .layout_routes import DEFAULTS

# PUBLIC storefront API — the customer-facing shop reads its theme/layout + catalog here.
# No auth (theme + in-stock catalog aren't secret); driven by what the builder saves.
router = APIRouter(prefix="/shop", tags=["shop"])


@router.get("/config")
async def shop_config(db=Depends(get_db)):
    row = (await db.execute(text("SELECT config FROM store_config WHERE store_id=1"))).first()
    cfg = row[0] if row else None
    if isinstance(cfg, str):
        cfg = json.loads(cfg)
    return cfg or DEFAULTS


@router.get("/catalog")
async def shop_catalog(q: str = Query(""), page: int = Query(1, ge=1), db=Depends(get_db)):
    per = 24
    where = ["i.in_stock", "i.store_id = 1"]
    params = {"per": per, "off": (page - 1) * per}
    if q:
        where.append("(coalesce(i.title, dc.title) ILIKE :q OR dc.artist ILIKE :q)")
        params["q"] = f"%{q}%"
    w = " AND ".join(where)
    items = [dict(r) for r in (await db.execute(text(f"""
        SELECT i.sku, coalesce(i.title, dc.title) AS title, dc.artist, dc.thumb,
               i.price::float AS price, i.condition, i.kind
        FROM inventory i LEFT JOIN disc_cache dc ON dc.release_id = i.release_id
        WHERE {w}
        ORDER BY i.updated_at DESC NULLS LAST
        LIMIT :per OFFSET :off"""), params)).mappings()]
    cparams = {k: v for k, v in params.items() if k not in ("per", "off")}
    total = (await db.execute(text(
        f"SELECT count(*) FROM inventory i LEFT JOIN disc_cache dc ON dc.release_id=i.release_id WHERE {w}"
    ), cparams)).scalar()
    return {"items": items, "page": page, "per": per, "total": total}