{% extends "brickwork/shell/docs.html" %}
{% comment %}
A documentation navigation page: the page that proves how a docs site is
browsed, not how one topic is read (icvoss/django-brickwork#412).

COPY THIS FILE into your project and edit it. It is not on the template loader
path, so you cannot extend it (ADR-056).

What your view must supply:
    crumbs                      breadcrumb trail: [{label, url}, ...], last unlinked
    docs_section_items          horizontal section switcher (bw_nav items)
    docs_section_active         which section switcher item is current
    docs_nav_items              hierarchical rail tree (bw_nav items)
    docs_nav_active             which rail item is current
    docs_search_action          the URL bw_search submits to (GET)
    navigation_state            "ready" | "empty" | "error" (see States below)
The headings and copy below are typed into the template.

WHY THIS PAGE IS SHAPED THIS WAY:

Documentation navigation is two seams working together, and this page is the
copyable proof of both:

1. A HORIZONTAL section switcher in docs_site_header
   ({% templatetag openblock %} bw_nav orientation="horizontal"
   {% templatetag closeblock %}), for top-level areas (Guides, API, Changelog).
   This is the surface #430 / NAV-024 unblocked: before 3.31.0 the package
   could not express a horizontal docs section row without hand-rolled CSS.
2. A VERTICAL hierarchical rail in docs_nav (default orientation), for the
   tree inside the current section. Section headers and children are ordinary
   NavItem values the view already builds for every other docs page.

The body is orientation guidance, not a third nav: search for the returning
reader, a short "how the tree works" lede, and three start cards that name
concrete doors. Duplicating the rail as a body sitemap would fight the shell.

SCOPE NOTE on a comment filed against this issue on 2026-08-31 that restates
#261's search-results asks: those asks belong on #411 (search results), not
here. This page is navigation chrome. Search results is a separate archetype.

States: navigation_state is the page's real branch.
  "ready": both nav seams and the body guidance render.
  "empty": no sections published yet (day-one docs site). Empty state in the
    body; search still renders. The horizontal switcher and rail are omitted
    when empty so a reader is not offered dead trees.
  "error": the nav tree failed to load. bw_alert danger in the body; chrome
    without the failed trees.
  LOADING: not applicable. Server-rendered from request-time context.
Accessibility: inherits docs shell skip link and landmarks. Horizontal nav
  is a real list of links (bw_nav); section switcher and rail are distinct
  landmarks via their wrapping regions. Method/meaning never rides on colour.
Responsive: horizontal nav wraps inside the site header; rail collapses to
  the docs shell disclosure below --bw-breakpoint-lg.
{% endcomment %}
{% load i18n brickwork_components brickwork_nav %}

{% block page_title %}Browse the docs - Northwind{% endblock %}

{% block docs_site_header %}
  <a class="bw-docs-site-header__brand" href="/docs/">{% translate "Northwind docs" %}</a>
  {% if navigation_state == "ready" %}
  {% bw_nav items=docs_section_items active=docs_section_active orientation="horizontal" %}
  {% endif %}
  {% bw_search docs_search_action placeholder="Search the docs..." %}
{% endblock %}

{% block docs_header %}
  <nav class="bw-breadcrumbs" aria-label="{% translate 'Breadcrumb' %}">
    {% include "brickwork/components/_breadcrumbs.html" with crumbs=crumbs %}
  </nav>

  <h1>{% translate "Browse the docs" %}</h1>
  <p>
    {% translate "Sections across the top, the tree for the current section in the rail. Search if you already know the words." %}
  </p>
{% endblock %}

{% block content %}
  {% if navigation_state == "empty" %}
  {% include "brickwork/components/_empty_state.html" with heading="No sections published yet" body="The documentation tree is empty. Publish the first guide to populate the section switcher and the rail, or contact support if you expected content here." icon="document" action_href="/support/" action_label="Contact support" %}

  {% elif navigation_state == "error" %}
  {% bw_alert "The documentation navigation tree could not be loaded. Retry in a moment, or use search if you know the page title." title="Navigation unavailable" variant="danger" %}

  {% else %}
  <div class="bw-section-stack">

    <section aria-labelledby="how-heading">
      <h2 id="how-heading" class="bw-band-heading">{% translate "How navigation works" %}</h2>
      <div class="bw-prose">
        <p class="bw-prose__lede">
          The row under the brand switches section. The rail lists every page
          in the section you are in. Search sits beside the brand for a
          returning reader who already has the words. Neither the row nor the
          rail replaces search.
        </p>
        <ul>
          <li>{% translate "Guides hold task walkthroughs. Start here for authentication, webhooks and rate limits." %}</li>
          <li>{% translate "API reference holds one page per operation. Open it when you already know the verb and path." %}</li>
          <li>{% translate "Changelog lists what changed per release, newest first." %}</li>
        </ul>
      </div>
    </section>

    <section aria-labelledby="doors-heading">
      <h2 id="doors-heading" class="bw-band-heading">{% translate "Open a section" %}</h2>
      <div class="bw-band-grid--3">
        <a class="bw-card bw-card--interactive bw-card--bordered" href="/docs/guides/">
          <h3 class="bw-card__title">{% translate "Guides" %}</h3>
          <div class="bw-card__body">
            <p>{% translate "Task-by-task walkthroughs. The rail under Guides lists every guide in reading order." %}</p>
          </div>
        </a>
        <a class="bw-card bw-card--interactive bw-card--bordered" href="/docs/api-reference/">
          <h3 class="bw-card__title">{% translate "API reference" %}</h3>
          <div class="bw-card__body">
            <p>{% translate "Every endpoint, field and status code. Grouped by resource in the rail." %}</p>
          </div>
        </a>
        <a class="bw-card bw-card--interactive bw-card--bordered" href="/docs/changelog/">
          <h3 class="bw-card__title">{% translate "Changelog" %}</h3>
          <div class="bw-card__body">
            <p>{% translate "What shipped in each release. Newest first; breaking changes called out in the entry." %}</p>
          </div>
        </a>
      </div>
    </section>

    <div class="bw-callout bw-callout--note">
      <p class="bw-callout__title">{% translate "You are in Guides" %}</p>
      <div class="bw-prose bw-callout__body">
        <p>
          The horizontal switcher marks Guides as current. The rail on the
          right (or under Documentation menu on a narrow viewport) is the
          Guides tree only.
        </p>
      </div>
    </div>

  </div>
  {% endif %}
{% endblock %}

{% block docs_nav %}
  {% if navigation_state == "ready" %}
  {% bw_nav items=docs_nav_items active=docs_nav_active labels="wrap" %}
  {% endif %}
{% endblock %}