{% extends 'auth/dashboard.html' %}
{% load static contract_tags %}

{% block title %}Sign Group Contract #{{ contract.id }} - Bomabest Agriservices{% endblock %}

{% block content %}
<div class="w-full max-w-6xl mx-auto px-2 sm:px-4 lg:px-8 py-4 sm:py-6 overflow-x-hidden">
  <div class="bg-white shadow-xl rounded-2xl p-4 sm:p-6 md:p-8 transition hover:shadow-2xl">

    <h1 class="text-xl sm:text-2xl md:text-3xl font-bold text-tea-green-800 mb-5 sm:mb-8 flex items-center gap-3">
      <svg class="w-8 h-8 sm:w-10 sm:h-10 text-tea-green-600 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"></path>
      </svg>
      <span class="min-w-0 break-words">Sign Group Contract - ID: {{ contract.id }}</span>
    </h1>

    {% if messages %}
    <div class="mb-6 space-y-2">
      {% for message in messages %}
      <div class="p-3 sm:p-4 rounded-xl bg-{% if message.tags == 'error' %}red{% else %}green{% endif %}-100 border-l-4 border-{% if message.tags == 'error' %}red{% else %}green{% endif %}-500 text-{% if message.tags == 'error' %}red{% else %}green{% endif %}-800 flex items-start gap-3">
        <svg class="w-5 h-5 sm:w-6 sm:h-6 mt-0.5 shrink-0" fill="currentColor" viewBox="0 0 20 20">
          {% if message.tags == 'error' %}
          <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clip-rule="evenodd"></path>
          {% else %}
          <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd"></path>
          {% endif %}
        </svg>
        <div class="min-w-0 break-words">{{ message }}</div>
      </div>
      {% endfor %}
    </div>
    {% endif %}

    <div class="bg-gradient-to-br from-tea-green-50 to-white rounded-2xl p-4 sm:p-6 md:p-8 mb-6 sm:mb-8 shadow-md border border-tea-green-200">
      <h2 class="text-lg sm:text-xl md:text-2xl font-bold text-tea-green-900 mb-4 sm:mb-6">Contract Summary</h2>
      <div class="grid grid-cols-1 md:grid-cols-2 gap-4 sm:gap-6">
        <div class="space-y-3 sm:space-y-4 min-w-0">
          <div class="break-words"><span class="font-semibold text-gray-700">Group:</span> <span class="ml-2">{{ contract.group.name }}</span></div>
          <div class="break-words"><span class="font-semibold text-gray-700">Type:</span> <span class="ml-2">{{ contract.get_type_display }}</span></div>
          <div class="break-words"><span class="font-semibold text-gray-700">Payment Term:</span> <span class="ml-2">{{ contract.payment_term }}</span></div>
          <div class="break-words"><span class="font-semibold text-gray-700">Months:</span> <span class="ml-2">{{ contract.months_for_payment }}</span></div>
          {% if contract.grace_period > 0 %}
          <div class="break-words"><span class="font-semibold text-gray-700">Grace Period:</span> <span class="ml-2">{{ contract.grace_period }} day{{ contract.grace_period|pluralize }}</span></div>
          {% endif %}
        </div>
        <div class="space-y-2 sm:space-y-4 md:text-right">
          <div class="text-2xl sm:text-3xl font-black text-tea-green-700 break-words">KES {{ contract.total_amount|floatformat:2 }}</div>
          <div class="text-sm sm:text-lg text-orange-600 font-bold break-words">Deposit Required: KES {{ contract.deposit_amount|floatformat:2 }}</div>
        </div>
      </div>
    </div>

    <div class="bg-white rounded-2xl shadow-md border border-gray-200 p-4 sm:p-6 mb-6 sm:mb-8 overflow-hidden">
      <h3 class="text-base sm:text-xl font-bold text-gray-800 mb-4">Contract Items</h3>
      <div class="overflow-x-auto">
        <table class="min-w-full text-sm">
          <thead class="bg-gray-100">
            <tr>
              <th class="px-4 py-3 text-left font-medium">Item</th>
              <th class="px-4 py-3 text-right font-medium">Quantity</th>
              <th class="px-4 py-3 text-right font-medium">Unit Price</th>
              <th class="px-4 py-3 text-right font-medium">Total</th>
            </tr>
          </thead>
          <tbody class="divide-y divide-gray-200">
            {% for ci in contract_inputs %}
            <tr>
              <td class="px-4 py-3 break-words">{{ ci.input.variety }}</td>
              <td class="px-4 py-3 text-right whitespace-nowrap">{{ ci.quantity }}</td>
              <td class="px-4 py-3 text-right whitespace-nowrap">KES {{ ci.unit_price|floatformat:2 }}</td>
              <td class="px-4 py-3 text-right font-bold text-tea-green-700 whitespace-nowrap">
                KES {{ ci.quantity|multiply:ci.unit_price|floatformat:2 }}
              </td>
            </tr>
            {% empty %}
            <tr><td colspan="4" class="text-center py-8 text-gray-500">No items in this contract</td></tr>
            {% endfor %}
          </tbody>
        </table>
      </div>
    </div>

    <div class="bg-white rounded-2xl shadow-md border-2 border-tea-green-300 p-4 sm:p-6 md:p-8 mb-6 sm:mb-8">
      <h3 class="text-lg sm:text-2xl font-bold text-tea-green-900 mb-4 sm:mb-6">Terms & Conditions</h3>
      <div class="bg-tea-green-50 rounded-xl p-4 sm:p-6 md:p-8 max-h-96 overflow-y-auto prose prose-lg max-w-none text-gray-800 leading-relaxed">
        {% if contract.terms_snapshot %}
          {{ contract.terms_snapshot|safe|linebreaksbr }}
        {% else %}
          <p class="italic text-gray-600">No terms available.</p>
        {% endif %}
      </div>

      <div class="mt-6 sm:mt-8 flex items-start">
        <input type="checkbox" id="agree-terms" class="mt-1 mr-3 sm:mr-4 h-5 w-5 sm:h-6 sm:w-6 text-tea-green-600 rounded focus:ring-tea-green-500 border-gray-300">
        <label for="agree-terms" class="text-sm sm:text-lg text-gray-700 leading-relaxed">
          I have read and agree to the Terms & Conditions above.
        </label>
      </div>

      <p class="mt-4 sm:mt-6 text-center text-xs sm:text-sm text-gray-600 font-medium">
        👆 Please scroll and read the terms carefully before signing.
      </p>
    </div>

    <form method="post" id="signForm">
      {% csrf_token %}
      <input type="hidden" name="signature_svg" id="signature_svg">

      <div class="bg-white rounded-2xl shadow-lg border-2 border-dashed border-tea-green-400 p-4 sm:p-6 md:p-8 mb-6 sm:mb-8">
        <h3 class="text-lg sm:text-2xl font-bold text-tea-green-900 mb-3 sm:mb-4 text-center">Your Signature</h3>
        <p class="text-center text-gray-600 mb-4 sm:mb-8 text-sm sm:text-lg">Draw your signature below using your mouse or touch</p>

        <div class="bg-gray-50 rounded-xl overflow-hidden border-4 border-gray-300 shadow-inner">
          <canvas id="signature-pad" class="w-full h-56 sm:h-64 md:h-72"></canvas>
        </div>

        <div class="mt-5 sm:mt-8 flex justify-center">
          <button type="button" id="clear-btn" class="px-6 sm:px-8 py-3 bg-gray-600 text-white rounded-xl hover:bg-gray-700 transition font-medium">
            Clear Signature
          </button>
        </div>
      </div>

      <div class="flex flex-col sm:flex-row justify-between items-center gap-4 sm:gap-6">
        <a href="{% url 'contract_market_place:group_contract_detail' contract.pk %}"
           class="w-full sm:w-auto px-6 sm:px-8 py-3 sm:py-4 bg-gray-600 text-white rounded-xl hover:bg-gray-700 transition flex items-center justify-center text-sm sm:text-lg font-medium">
          <svg class="w-5 h-5 sm:w-6 sm:h-6 mr-2 sm:mr-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
          </svg>
          Cancel
        </a>

        <button type="submit" id="sign-btn" disabled
                class="w-full sm:w-auto px-8 sm:px-12 py-3 sm:py-4 bg-tea-green-600 text-white rounded-xl hover:bg-tea-green-700 transition flex items-center justify-center text-sm sm:text-lg font-bold disabled:opacity-50 disabled:cursor-not-allowed shadow-lg">
          <svg class="w-6 h-6 sm:w-7 sm:h-7 mr-2 sm:mr-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"></path>
          </svg>
          Sign & Submit
        </button>
      </div>
    </form>

  </div>
</div>

<script src="https://cdn.jsdelivr.net/npm/signature_pad@4.0.0/dist/signature_pad.umd.min.js"></script>
<script>
  const canvas = document.getElementById('signature-pad');
  const signaturePad = new SignaturePad(canvas, {
    backgroundColor: 'rgb(249, 250, 251)',
    penColor: 'rgb(0, 0, 0)',
    minWidth: 1.5,
    maxWidth: 3.5,
    throttle: 16,
    velocityFilterWeight: 0.7
  });

  const clearBtn = document.getElementById('clear-btn');
  const signBtn = document.getElementById('sign-btn');
  const agreeCheckbox = document.getElementById('agree-terms');
  const signatureInput = document.getElementById('signature_svg');

  function resizeCanvas() {
    const ratio = Math.max(window.devicePixelRatio || 1, 1);
    canvas.width = canvas.offsetWidth * ratio;
    canvas.height = canvas.offsetHeight * ratio;
    canvas.getContext('2d').scale(ratio, ratio);
    signaturePad.clear();
  }

  window.addEventListener('resize', resizeCanvas);
  resizeCanvas();

  function updateSignButton() {
    const hasSignature = !signaturePad.isEmpty();
    const hasAgreed = agreeCheckbox.checked;
    signBtn.disabled = !(hasSignature && hasAgreed);
  }

  clearBtn.addEventListener('click', () => {
    signaturePad.clear();
    updateSignButton();
  });

  agreeCheckbox.addEventListener('change', updateSignButton);
  signaturePad.addEventListener('endStroke', updateSignButton);
  updateSignButton();

  document.getElementById('signForm').addEventListener('submit', (e) => {
    if (signaturePad.isEmpty()) {
      e.preventDefault();
      alert('Please draw your signature before submitting.');
      return;
    }
    if (!agreeCheckbox.checked) {
      e.preventDefault();
      alert('You must agree to the Terms & Conditions.');
      return;
    }
    signatureInput.value = signaturePad.toDataURL('image/png');
  });
</script>
{% endblock %}