{% extends "web/base.html" %}
{% load static %}
{% load bangla_numbers %}

{% block title %}Subject Subscription - PassMCQ{% endblock title %}

{% block content %}
<div class="bg-gray-50 dark:bg-slate-900 w-full min-h-screen" x-data="subscriptionFilter()">
  <div class="w-[90%] md:w-[80%] max-w-[1280px] mx-auto py-8 md:py-12">
    
    <!-- Header -->
    <div class="text-center mb-8">
      <h1 class="text-2xl md:text-3xl xl:text-4xl font-bold text-gray-800 dark:text-white">
        Subject <span class="text-emerald-600 dark:text-emerald-400">Subscription</span>
      </h1>
      <p class="mt-4 text-gray-600 dark:text-gray-400">
        Choose specific subjects to focus your preparation
      </p>
    </div>

    <!-- Filter Buttons -->
    <div class="flex flex-wrap justify-center gap-3 mb-10">
      <button @click="selectedClass = ''"
              :class="selectedClass === '' ? 'bg-emerald-600 text-white' : 'bg-white dark:bg-slate-800 text-gray-700 dark:text-gray-300'"
              class="border border-gray-300 dark:border-slate-600 px-5 py-2 rounded-xl font-medium transition-all hover:shadow-md">
        All Classes
      </button>
      {% for class_level in class_levels %}
      <button @click="selectedClass = '{{ class_level.id }}'"
              :class="selectedClass === '{{ class_level.id }}' ? 'bg-emerald-600 text-white' : 'bg-white dark:bg-slate-800 text-gray-700 dark:text-gray-300'"
              class="border border-gray-300 dark:border-slate-600 px-5 py-2 rounded-xl font-medium transition-all hover:shadow-md">
        {{ class_level.name }}
      </button>
      {% endfor %}
    </div>

    <!-- Subscription Cards -->
    <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6">
      {% for subscription in subject_subscription %}
      <template x-if="selectedClass === '' || selectedClass === '{{ subscription.class_level.id }}'">
        <div class="flex flex-col bg-white dark:bg-slate-800 border border-gray-200 dark:border-slate-600 rounded-2xl p-6 shadow-lg hover:shadow-xl transition-all duration-300">
          <div class="flex-grow">
            <h2 class="text-xl md:text-2xl font-bold text-emerald-600 dark:text-emerald-400">{{ subscription.title }}</h2>
            <p class="text-sm text-gray-600 dark:text-gray-400 mt-3">{{ subscription.description }}</p>

            <div class="mt-4 space-y-3">
              <div class="flex items-center gap-2">
                <span class="text-xs font-medium text-gray-500 dark:text-gray-400">Class:</span>
                <span class="text-sm bg-blue-100 dark:bg-blue-900/30 text-blue-700 dark:text-blue-400 px-2 py-0.5 rounded-full">
                  {{ subscription.class_level.name }}
                </span>
              </div>
              <div class="flex items-center gap-2">
                <span class="text-xs font-medium text-gray-500 dark:text-gray-400">Subject:</span>
                <span class="text-sm bg-emerald-100 dark:bg-emerald-900/30 text-emerald-700 dark:text-emerald-400 px-2 py-0.5 rounded-full">
                  {{ subscription.subject.name }}
                </span>
              </div>
            </div>

            <div class="mt-5">
              <h3 class="text-sm font-semibold text-gray-700 dark:text-gray-300 mb-2">What's Included:</h3>
              <ul class="space-y-2">
                {% for key in subscription.keys.all %}
                <li class="flex items-start gap-2 text-sm text-gray-600 dark:text-gray-400">
                  <svg class="h-4 w-4 text-emerald-500 mt-0.5 flex-shrink-0" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clip-rule="evenodd"/></svg>
                  {{ key.key }}
                </li>
                {% endfor %}
              </ul>
            </div>
          </div>

          <div class="flex flex-row justify-between items-center mt-6 pt-4 border-t border-gray-100 dark:border-slate-700">
            <span class="text-2xl font-bold text-emerald-600 dark:text-emerald-400">
              {% if subscription.price == 0 %}
                Free
              {% else %}
                ৳{{ subscription.price }}
              {% endif %}
            </span>

            {% if subscription.price == 0 %}
            <form action="{% url 'free_subscription' 'subject_based' subscription.id %}" 
                  method="POST"
                  data-turbo-frame="mainContent"
                  data-turbo="false"
                  class="subscription-form"
                  onsubmit="handleLoadingForm(event, this)">
              {% csrf_token %}
              <button type="submit"
                      class="submit-btn inline-flex items-center gap-2 bg-emerald-500 hover:bg-emerald-600 text-white px-5 py-2.5 rounded-xl font-medium transition-colors">
                <svg class="hidden animate-spin h-5 w-5 text-white spinner" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                  <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
                  <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8v8H4z"></path>
                </svg>
                <span class="submit-label">Subscribe Free</span>
              </button>
            </form>
            {% else %}
            <a href="{% url 'app:checkout_subject' subscription.id %}"
               class="inline-flex items-center gap-2 bg-emerald-500 hover:bg-emerald-600 text-white px-5 py-2.5 rounded-xl font-medium transition-colors"
               data-turbo-frame="mainContent"
               data-turbo-action="advance">
              Subscribe Now
              <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
              </svg>
            </a>
            {% endif %}
          </div>
        </div>
      </template>
      {% endfor %}
    </div>
  </div>
</div>
{% endblock content %}

{% block script_link %}
<script>
  function subscriptionFilter() {
    return {
      selectedClass: ''
    };
  }
  
  function handleLoadingForm(event, form) {
    const submitBtn = form.querySelector(".submit-btn");
    const spinner = submitBtn.querySelector(".spinner");
    const label = submitBtn.querySelector(".submit-label");

    submitBtn.disabled = true;
    spinner.classList.remove("hidden");
    label.textContent = "Processing...";
  }
</script>
{% endblock script_link %}