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

from pathlib import Path

from quart import g, abort, request
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, register_all_markets, register_page_markets, register_fragments


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

    - nav_tree_html: fetched from blog as fragment
    - cart_count/cart_total: via cart service (includes calendar entries)
    - cart: direct ORM query (templates need .product relationship)
    """
    from shared.infrastructure.context import base_context
    from shared.services.navigation import get_navigation_tree
    from shared.services.registry import services
    from shared.infrastructure.cart_identity import current_cart_identity
    from shared.infrastructure.fragments import fetch_fragment
    from shared.models.market import CartItem
    from sqlalchemy.orm import selectinload

    ctx = await base_context()

    ctx["nav_tree_html"] = await fetch_fragment(
        "blog", "nav-tree",
        params={"app_name": "market", "path": request.path},
    )
    # Fallback for _nav.html when nav-tree fragment fetch fails
    ctx["menu_items"] = await get_navigation_tree(g.s)

    ident = current_cart_identity()

    # cart_count/cart_total via service (consistent with blog/events apps)
    summary = await services.cart.cart_summary(
        g.s, user_id=ident["user_id"], session_id=ident["session_id"],
    )
    ctx["cart_count"] = summary.count + summary.calendar_count
    ctx["cart_total"] = float(summary.total + summary.calendar_total)

    # ORM cart items for product templates (need .product relationship)
    filters = [CartItem.deleted_at.is_(None)]
    if ident["user_id"] is not None:
        filters.append(CartItem.user_id == ident["user_id"])
    elif ident["session_id"] is not None:
        filters.append(CartItem.session_id == ident["session_id"])
    else:
        ctx["cart"] = []
        return ctx

    result = await g.s.execute(
        select(CartItem).where(*filters).options(selectinload(CartItem.product))
    )
    ctx["cart"] = list(result.scalars().all())

    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,
    ])

    # All markets: / — global view across all pages
    app.register_blueprint(
        register_all_markets(),
        url_prefix="/",
    )

    # Page markets: /<slug>/ — markets for a single page
    app.register_blueprint(
        register_page_markets(),
        url_prefix="/<slug>",
    )

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

    app.register_blueprint(register_fragments())

    # --- Auto-inject slugs into url_for() calls ---
    @app.url_value_preprocessor
    def pull_slugs(endpoint, values):
        if values:
            # page_markets blueprint uses "slug"
            if "slug" in values:
                g.post_slug = values.pop("slug")
            # market blueprint uses "page_slug" / "market_slug"
            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):
        slug = g.get("post_slug")
        if slug:
            for param in ("slug", "page_slug"):
                if param not in values and app.url_map.is_endpoint_expecting(endpoint, param):
                    values[param] = slug
        market_slug = g.get("market_slug")
        if market_slug and "market_slug" not in values:
            if app.url_map.is_endpoint_expecting(endpoint, "market_slug"):
                values["market_slug"] = market_slug

    # --- 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:
            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,
            },
        }

        # Only load market when market_slug is present (/<page_slug>/<market_slug>/)
        if not market_slug:
            return

        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}

    return app


app = create_app()