"""
Shared helper functions for s-expression page rendering.

These are used by per-service sexp_components.py files to build common
page elements (headers, search, etc.) from template context.
"""
from __future__ import annotations

from typing import Any

from .jinja_bridge import sexp
from .page import HAMBURGER_HTML, SEARCH_HEADERS_MOBILE, SEARCH_HEADERS_DESKTOP


def call_url(ctx: dict, key: str, path: str = "/") -> str:
    """Call a URL helper from context (e.g., blog_url, account_url)."""
    fn = ctx.get(key)
    if callable(fn):
        return fn(path)
    return str(fn or "") + path


def get_asset_url(ctx: dict) -> str:
    """Extract the asset URL base from context."""
    au = ctx.get("asset_url")
    if callable(au):
        result = au("")
        return result.rsplit("/", 1)[0] if "/" in result else result
    return au or ""


def root_header_html(ctx: dict, *, oob: bool = False) -> str:
    """Build the root header row HTML."""
    return sexp(
        '(~header-row :cart-mini-html cmi :blog-url bu :site-title st'
        ' :nav-tree-html nth :auth-menu-html amh :nav-panel-html nph'
        ' :hamburger-html hh :oob oob)',
        cmi=ctx.get("cart_mini_html", ""),
        bu=call_url(ctx, "blog_url", ""),
        st=ctx.get("base_title", ""),
        nth=ctx.get("nav_tree_html", ""),
        amh=ctx.get("auth_menu_html", ""),
        nph=ctx.get("nav_panel_html", ""),
        hh=HAMBURGER_HTML,
        oob=oob,
    )


def search_mobile_html(ctx: dict) -> str:
    """Build mobile search input HTML."""
    return sexp(
        '(~search-mobile :current-local-href clh :search s :search-count sc'
        ' :hx-select hs :search-headers-mobile shm)',
        clh=ctx.get("current_local_href", "/"),
        s=ctx.get("search", ""),
        sc=ctx.get("search_count", ""),
        hs=ctx.get("hx_select", "#main-panel"),
        shm=SEARCH_HEADERS_MOBILE,
    )


def search_desktop_html(ctx: dict) -> str:
    """Build desktop search input HTML."""
    return sexp(
        '(~search-desktop :current-local-href clh :search s :search-count sc'
        ' :hx-select hs :search-headers-desktop shd)',
        clh=ctx.get("current_local_href", "/"),
        s=ctx.get("search", ""),
        sc=ctx.get("search_count", ""),
        hs=ctx.get("hx_select", "#main-panel"),
        shd=SEARCH_HEADERS_DESKTOP,
    )


def full_page(ctx: dict, *, header_rows_html: str,
              filter_html: str = "", aside_html: str = "",
              content_html: str = "", menu_html: str = "",
              body_end_html: str = "", meta_html: str = "") -> str:
    """Render a full app page with the standard layout."""
    return sexp(
        '(~app-layout :title t :asset-url au :meta-html mh'
        ' :header-rows-html hrh :menu-html muh :filter-html fh'
        ' :aside-html ash :content-html ch :body-end-html beh)',
        t=ctx.get("base_title", "Rose Ash"),
        au=get_asset_url(ctx),
        mh=meta_html,
        hrh=header_rows_html,
        muh=menu_html,
        fh=filter_html,
        ash=aside_html,
        ch=content_html,
        beh=body_end_html,
    )


def oob_page(ctx: dict, *, oobs_html: str = "",
             filter_html: str = "", aside_html: str = "",
             content_html: str = "", menu_html: str = "") -> str:
    """Render an OOB response with standard swap targets."""
    return sexp(
        '(~oob-response :oobs-html oh :filter-html fh :aside-html ash'
        ' :menu-html mh :content-html ch)',
        oh=oobs_html,
        fh=filter_html,
        ash=aside_html,
        mh=menu_html,
        ch=content_html,
    )