from __future__ import annotations
import path_setup  # noqa: F401  # adds shared_lib to sys.path

from pathlib import Path

from quart import g, abort, render_template, make_response
from jinja2 import FileSystemLoader, ChoiceLoader
from sqlalchemy import select

from shared.infrastructure.factory import create_base_app
from shared.config import config

from bp import register_market_bp


async def market_context() -> dict:
    """
    Market app context processor.

    - menu_items: direct DB query
    - cart/cart_count/cart_total: direct DB (market owns CartItem/Product)
    """
    from shared.infrastructure.context import base_context
    from shared.services.navigation import get_navigation_tree
    from shared.infrastructure.cart_identity import current_cart_identity
    from shared.models.market import CartItem
    from sqlalchemy.orm import selectinload

    ctx = await base_context()

    ctx["menu_items"] = await get_navigation_tree(g.s)

    # Market owns CartItem/Product — query directly for template compat
    ident = current_cart_identity()
    filters = [CartItem.deleted_at.is_(None)]
    if ident["user_id"]:
        filters.append(CartItem.user_id == ident["user_id"])
    elif ident["session_id"]:
        filters.append(CartItem.session_id == ident["session_id"])
    else:
        ctx["cart"] = []
        ctx["cart_count"] = 0
        ctx["cart_total"] = 0
        return ctx

    result = await g.s.execute(
        select(CartItem).where(*filters).options(selectinload(CartItem.product))
    )
    cart_items = list(result.scalars().all())

    ctx["cart"] = cart_items
    ctx["cart_count"] = sum(ci.quantity for ci in cart_items)
    ctx["cart_total"] = float(sum(
        (ci.product.special_price or ci.product.regular_price or 0) * ci.quantity
        for ci in cart_items if ci.product
    ))

    return ctx


def create_app() -> "Quart":
    from models.market_place import MarketPlace
    from shared.services.registry import services
    from services import register_domain_services

    app = create_base_app(
        "market",
        context_fn=market_context,
        domain_services_fn=register_domain_services,
    )

    # App-specific templates override shared templates
    app_templates = str(Path(__file__).resolve().parent / "templates")
    app.jinja_loader = ChoiceLoader([
        FileSystemLoader(app_templates),
        app.jinja_loader,
    ])

    # Market blueprint nested under post slug: /<page_slug>/<market_slug>/
    app.register_blueprint(
        register_market_bp(
            url_prefix="/",
            title=config()["coop_title"],
        ),
        url_prefix="/<page_slug>/<market_slug>",
    )

    # --- Auto-inject page_slug and market_slug into url_for() calls ---
    @app.url_value_preprocessor
    def pull_slugs(endpoint, values):
        if values:
            if "page_slug" in values:
                g.post_slug = values.pop("page_slug")
            if "market_slug" in values:
                g.market_slug = values.pop("market_slug")

    @app.url_defaults
    def inject_slugs(endpoint, values):
        for attr, param in [("post_slug", "page_slug"), ("market_slug", "market_slug")]:
            val = g.get(attr)
            if val and param not in values:
                if app.url_map.is_endpoint_expecting(endpoint, param):
                    values[param] = val

    # --- Load post and market data ---
    @app.before_request
    async def hydrate_market():
        post_slug = getattr(g, "post_slug", None)
        market_slug = getattr(g, "market_slug", None)
        if not post_slug or not market_slug:
            return

        # Load post by slug via blog service
        post = await services.blog.get_post_by_slug(g.s, post_slug)
        if not post:
            abort(404)

        g.post_data = {
            "post": {
                "id": post.id,
                "title": post.title,
                "slug": post.slug,
                "feature_image": post.feature_image,
                "html": post.html,
                "status": post.status,
                "visibility": post.visibility,
                "is_page": post.is_page,
            },
        }

        # Load market scoped to post (container pattern)
        market = (
            await g.s.execute(
                select(MarketPlace).where(
                    MarketPlace.slug == market_slug,
                    MarketPlace.container_type == "page",
                    MarketPlace.container_id == post.id,
                    MarketPlace.deleted_at.is_(None),
                )
            )
        ).scalar_one_or_none()
        if not market:
            abort(404)
        g.market = market

    @app.context_processor
    async def inject_post():
        post_data = getattr(g, "post_data", None)
        if not post_data:
            return {}
        return {**post_data}

    # --- Root route: market listing ---
    @app.get("/")
    async def markets_listing():
        result = await g.s.execute(
            select(MarketPlace)
            .where(MarketPlace.deleted_at.is_(None), MarketPlace.container_type == "page")
            .order_by(MarketPlace.name)
        )
        all_markets = result.scalars().all()

        # Resolve page posts via blog service
        post_ids = list({m.container_id for m in all_markets})
        posts_by_id = {
            p.id: p
            for p in await services.blog.get_posts_by_ids(g.s, post_ids)
        }
        markets = []
        for market in all_markets:
            market.page = posts_by_id.get(market.container_id)
            markets.append(market)

        html = await render_template(
            "_types/market/markets_listing.html",
            markets=markets,
        )
        return await make_response(html)

    return app


app = create_app()