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

from decimal import Decimal
from pathlib import Path

from types import SimpleNamespace

from quart import g, abort, request
from jinja2 import FileSystemLoader, ChoiceLoader

from shared.infrastructure.factory import create_base_app

from bp import (
    register_cart_overview,
    register_page_cart,
    register_cart_global,
    register_page_admin,
    register_actions,
    register_data,
    register_inbox,
)
from bp.cart.services import (
    get_cart,
    total,
    get_calendar_cart_entries,
    calendar_total,
    get_ticket_cart_entries,
    ticket_total,
)
from bp.cart.services.page_cart import (
    get_cart_for_page,
    get_calendar_entries_for_page,
    get_tickets_for_page,
)
from bp.cart.services.ticket_groups import group_tickets


async def _load_cart():
    """Load the full cart for the cart app (before each request)."""
    g.cart = await get_cart(g.s)


async def cart_context() -> dict:
    """
    Cart app context processor.

    - cart / calendar_cart_entries / total / calendar_total: direct DB
      (cart app owns this data)
    - cart_count: derived from cart + calendar entries (for _mini.html)
    - nav_tree: fetched from blog as fragment

    When g.page_post exists, cart and calendar_cart_entries are page-scoped.
    Global cart_count / cart_total stay global for cart-mini.
    """
    from shared.infrastructure.context import base_context
    from shared.infrastructure.cart_identity import current_cart_identity
    from shared.infrastructure.fragments import fetch_fragments

    ctx = await base_context()

    # menu_nodes lives in db_blog; nav-tree fragment provides the real nav
    ctx["menu_items"] = []

    # Pre-fetch cross-app HTML fragments concurrently
    user = getattr(g, "user", None)
    ident = current_cart_identity()
    cart_params = {}
    if ident["user_id"] is not None:
        cart_params["user_id"] = ident["user_id"]
    if ident["session_id"] is not None:
        cart_params["session_id"] = ident["session_id"]

    cart_mini, auth_menu, nav_tree = await fetch_fragments([
        ("cart", "cart-mini", cart_params or None),
        ("account", "auth-menu", {"email": user.email} if user else None),
        ("blog", "nav-tree", {"app_name": "cart", "path": request.path}),
    ])
    ctx["cart_mini"] = cart_mini
    ctx["auth_menu"] = auth_menu
    ctx["nav_tree"] = nav_tree

    # Cart app owns cart data — use g.cart from _load_cart
    all_cart = getattr(g, "cart", None) or []
    all_cal = await get_calendar_cart_entries(g.s)
    all_tickets = await get_ticket_cart_entries(g.s)

    # Global counts for cart-mini (always global)
    cart_qty = sum(ci.quantity for ci in all_cart) if all_cart else 0
    ctx["cart_count"] = cart_qty + len(all_cal) + len(all_tickets)
    ctx["cart_total"] = (total(all_cart) or Decimal(0)) + (calendar_total(all_cal) or Decimal(0)) + (ticket_total(all_tickets) or Decimal(0))

    # Page-scoped data when viewing a page cart
    page_post = getattr(g, "page_post", None)
    if page_post:
        page_cart = await get_cart_for_page(g.s, page_post.id)
        page_cal = await get_calendar_entries_for_page(g.s, page_post.id)
        page_tickets = await get_tickets_for_page(g.s, page_post.id)
        ctx["cart"] = page_cart
        ctx["calendar_cart_entries"] = page_cal
        ctx["ticket_cart_entries"] = page_tickets
        ctx["page_post"] = page_post
        ctx["page_config"] = getattr(g, "page_config", None)
    else:
        ctx["cart"] = all_cart
        ctx["calendar_cart_entries"] = all_cal
        ctx["ticket_cart_entries"] = all_tickets

    ctx["ticket_groups"] = group_tickets(ctx.get("ticket_cart_entries", []))
    ctx["total"] = total
    ctx["calendar_total"] = calendar_total
    ctx["ticket_total"] = ticket_total

    return ctx


def _make_page_config(raw: dict) -> SimpleNamespace:
    """Convert a page-config JSON dict to a namespace for SumUp helpers."""
    return SimpleNamespace(**raw)


def create_app() -> "Quart":
    from services import register_domain_services

    app = create_base_app(
        "cart",
        context_fn=cart_context,
        before_request_fns=[_load_cart],
        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,
    ])

    app.jinja_env.globals["cart_quantity_url"] = lambda product_id: f"/quantity/{product_id}/"
    app.jinja_env.globals["cart_delete_url"] = lambda product_id: f"/delete/{product_id}/"

    import os as _os
    load_service_components(_os.path.dirname(_os.path.abspath(__file__)), service_name="cart")

    from shared.sx.handlers import auto_mount_fragment_handlers
    auto_mount_fragment_handlers(app, "cart")

    app.register_blueprint(register_actions())
    app.register_blueprint(register_data())
    app.register_blueprint(register_inbox())

    # --- Page slug hydration (follows events/market app pattern) ---

    @app.url_value_preprocessor
    def pull_page_slug(endpoint, values):
        if values and "page_slug" in values:
            g.page_slug = values.pop("page_slug")

    @app.url_defaults
    def inject_page_slug(endpoint, values):
        slug = g.get("page_slug")
        if slug and "page_slug" not in values:
            if app.url_map.is_endpoint_expecting(endpoint, "page_slug"):
                values["page_slug"] = slug

    @app.before_request
    async def hydrate_page():
        from shared.infrastructure.data_client import fetch_data
        from shared.contracts.dtos import PostDTO, dto_from_dict
        slug = getattr(g, "page_slug", None)
        if not slug:
            return
        raw = await fetch_data("blog", "post-by-slug", params={"slug": slug})
        if not raw:
            abort(404)
        post = dto_from_dict(PostDTO, raw)
        if not post or not post.is_page:
            abort(404)
        g.page_post = post
        raw_pc = await fetch_data(
            "blog", "page-config",
            params={"container_type": "page", "container_id": post.id},
            required=False,
        )
        g.page_config = _make_page_config(raw_pc) if raw_pc else None

    # Setup defpage routes
    from sxc.pages import setup_cart_pages
    setup_cart_pages()

    # --- Blueprint registration ---
    # Static prefixes first, dynamic (page_slug) last

    # Global routes (add, quantity, delete, checkout — specific paths under /)
    app.register_blueprint(
        register_cart_global(url_prefix="/"),
        url_prefix="/",
    )

    # Cart overview blueprint (no defpage routes, just action endpoints)
    overview_bp = register_cart_overview(url_prefix="/")
    app.register_blueprint(overview_bp, url_prefix="/")

    # Page admin (PUT /payments/ etc.)
    admin_bp = register_page_admin()
    app.register_blueprint(admin_bp, url_prefix="/<page_slug>/admin")

    # Page cart (POST /checkout/ etc.)
    page_cart_bp = register_page_cart(url_prefix="/")
    app.register_blueprint(page_cart_bp, url_prefix="/<page_slug>")

    # Auto-mount all defpages with absolute paths
    from shared.sx.pages import auto_mount_pages
    auto_mount_pages(app, "cart")

    return app


app = create_app()
