{#
  Reusable UI macros for Tutortool templates.
  Usage: {% from "macros/ui.html" import flash_messages, styled_field, text_input %}
#}


{# Renders all flashed messages with colour-coded styling. #}
{% macro flash_messages() %}
  {% with messages = get_flashed_messages(with_categories=true) %}
    {% if messages %}
      <div class="space-y-3 mb-6">
        {% for category, message in messages %}
          {% if category == 'error' %}
            {% set alert_class = 'bg-red-900 border-red-400 text-red-100' %}
          {% elif category == 'expired' %}
            {% set alert_class = 'bg-orange-900 border-orange-400 text-orange-100' %}
          {% else %}
            {% set alert_class = 'bg-green-900 border-green-400 text-green-100' %}
          {% endif %}
          <div class="p-3 border rounded-lg {{ alert_class }}" role="alert">
            {{ message }}
          </div>
        {% endfor %}
      </div>
    {% endif %}
  {% endwith %}
{% endmacro %}


{#
  Renders a WTForms field with a label and standard Tailwind styling.
  Pass extra_kwargs as a dict for additional HTML attributes (e.g. type, multiple).
#}
{% macro styled_field(field, extra_kwargs={}) %}
  <div>
    <label class="block mb-1 text-sm font-medium">{{ field.label }}</label>
    {{ field(
        class="w-full rounded-lg p-3 bg-background border border-border text-text placeholder-muted focus:outline-none focus:ring-2 focus:ring-primary",
        **extra_kwargs
    ) }}
    {% for error in field.errors %}
      <p class="text-red-400 text-sm mt-1">{{ error }}</p>
    {% endfor %}
  </div>
{% endmacro %}


{# 
  Renders a plain <input> (not WTForms) with standard styling.
  `type` defaults to 'text'.
#}
{% macro text_input(name, label, placeholder='', type='text', required=true, autofocus=false) %}
  <div class="mb-4">
    <label for="{{ name }}" class="block text-sm font-medium text-gray-400 mb-2">{{ label }}</label>
    <input
      type="{{ type }}"
      id="{{ name }}"
      name="{{ name }}"
      placeholder="{{ placeholder }}"
      {% if required %}required{% endif %}
      {% if autofocus %}autofocus{% endif %}
      class="w-full px-4 py-2 bg-gray-700 border border-gray-600 rounded-lg text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
    >
  </div>
{% endmacro %}


{# Renders a delete button wrapped in a form. #}
{% macro delete_button(action_url, label='Delete') %}
  <form method="POST" action="{{ action_url }}">
    <button type="submit" class="bg-red-600 hover:bg-red-700 text-white px-3 py-1 rounded-lg text-sm">
      {{ label }}
    </button>
  </form>
{% endmacro %}


{# Course-switcher dropdown (used in admin and index pages). #}
{% macro course_switcher(courses, active_course_name, switch_url_prefix) %}
<div class="relative" id="course-switcher">
  <button
    type="button"
    onclick="toggleCourseSwitcher()"
    class="flex items-center gap-2 px-4 py-1.5 rounded-full
           bg-surface shadow-md ring-1 ring-border
           text-sm font-medium text-text
           hover:ring-primary hover:text-primary
           transition whitespace-nowrap">
    <span id="course-switcher-label">{{ active_course_name }}</span>
    <svg class="w-3.5 h-3.5 text-muted transition-transform duration-200" id="course-switcher-chevron"
         xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 10 6">
      <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="m1 1 4 4 4-4"/>
    </svg>
  </button>

  <div id="course-switcher-menu"
       class="hidden absolute left-1/2 -translate-x-1/2 mt-2 w-52 z-50
              bg-surface border border-border rounded-xl shadow-lg overflow-hidden whitespace-nowrap">
    {% for course in courses %}
      <form method="POST" action="{{ switch_url_prefix }}/{{ course.id }}">
        <button type="submit"
                class="w-full text-left px-4 py-2.5 text-sm
                       {% if course.name == active_course_name %}
                         text-primary font-semibold bg-primary/10
                       {% else %}
                         text-text hover:bg-background hover:text-primary
                       {% endif %}
                       transition">
          {{ course.name }}
        </button>
      </form>
    {% endfor %}
  </div>
</div>

<script>
  function toggleCourseSwitcher() {
    const menu     = document.getElementById('course-switcher-menu');
    const chevron  = document.getElementById('course-switcher-chevron');
    const isOpen   = !menu.classList.contains('hidden');
    menu.classList.toggle('hidden', isOpen);
    chevron.style.transform = isOpen ? '' : 'rotate(180deg)';

    if (!isOpen) {
      // Close when clicking outside
      document.addEventListener('click', function handler(e) {
        if (!document.getElementById('course-switcher').contains(e.target)) {
          menu.classList.add('hidden');
          chevron.style.transform = '';
          document.removeEventListener('click', handler);
        }
      });
    }
  }
</script>
{% endmacro %}