{% extends 'lms/base.html' %}
{% load lms_tags %}

{% block title %}{{ assignment.title }} | ЕГЭ LMS{% endblock %}

{% block content %}
<!-- Page Header -->
<div class="mb-7">
    <a href="{% url 'lms:dashboard' %}" class="inline-flex items-center gap-1.5 text-sm font-medium text-txt-muted hover:text-white transition-colors font-heading mb-4 bg-obsidian-card border border-obsidian-border hover:border-obsidian-borderLight px-3 py-1.5 rounded-lg">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path d="M10 19l-7-7m0 0l7-7m-7 7h18" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path>
        </svg>
        Назад к списку
    </a>
    
    <div class="flex flex-col md:flex-row md:items-start justify-between gap-4">
        <div>
            <h1 class="text-2xl sm:text-3xl font-bold text-white tracking-tight font-heading">{{ assignment.title }}</h1>
            <div class="mt-2 flex items-center gap-3">
                <span class="inline-flex items-center px-2 py-0.5 rounded text-[11px] font-mono uppercase tracking-wider bg-obsidian-card text-txt-secondary border border-obsidian-border">
                    Предмет: {{ assignment.subject.name }}
                </span>
            </div>
        </div>
    </div>
</div>

<!-- Description block -->
<div class="bg-obsidian-card rounded-xl border border-obsidian-border p-6 sm:p-8 mb-8 shadow-sm">
    <h3 class="text-lg font-bold text-white mb-4 font-heading border-b border-obsidian-border pb-3">Описание задания</h3>
    <div class="prose prose-invert max-w-none text-txt-secondary font-body prose-a:text-accent-blue hover:prose-a:text-accent-blueHover">
        {{ assignment.description|safe }}
    </div>
</div>

<div class="bg-obsidian-card rounded-xl border border-obsidian-border p-6 sm:p-8 shadow-sm">
    <h3 class="text-lg font-bold text-white mb-6 font-heading border-b border-obsidian-border pb-3">Ваш ответ</h3>
    
    {% if submission and submission.status != 'IN_PROGRESS' %}
        <div class="mb-8 p-5 rounded-lg border {% if submission.status == 'GRADED' %}bg-emerald-950/20 text-emerald-300 border-emerald-800/40{% else %}bg-amber-950/20 text-amber-300 border-amber-800/40{% endif %}">
            {% if submission.status == 'GRADED' %}
                <h4 class="font-bold mb-2 flex items-center gap-2 font-heading">
                    <svg class="w-5 h-5 text-emerald-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path d="M5 13l4 4L19 7" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path>
                    </svg>
                    Оценка: {{ submission.grade|default:"Не выставлена" }}
                </h4>
            {% else %}
                <h4 class="font-bold mb-2 flex items-center gap-2 font-heading">
                    <span class="w-2 h-2 rounded-full bg-amber-400 animate-pulse"></span>
                    Ваша работа отправлена и ожидает проверки.
                </h4>
            {% endif %}
            
            {% if submission.teacher_feedback %}
                <div class="mt-4 p-4 rounded bg-obsidian-base border border-obsidian-borderLight">
                    <p class="font-medium text-white text-sm mb-1">Общий комментарий преподавателя:</p>
                    <p class="text-sm text-txt-secondary">{{ submission.teacher_feedback }}</p>
                </div>
            {% endif %}
        </div>
        
        <h4 class="font-bold mb-5 text-white font-heading">Ваши ответы на задачи:</h4>
        <div class="space-y-6">
            {% for answer in submission.answers.all %}
            <div class="p-5 bg-obsidian-base border border-obsidian-border rounded-lg relative overflow-hidden">
                <!-- Status indicator line -->
                <div class="absolute left-0 top-0 bottom-0 w-1 {% if answer.is_correct %}bg-emerald-500{% elif answer.is_correct == False %}bg-rose-500{% else %}bg-txt-faint{% endif %}"></div>
                
                <h5 class="font-medium text-sm text-txt-muted mb-3 pl-2">Задача {{ forloop.counter }}: {{ answer.question.text|striptags|truncatewords:10 }}</h5>
                
                <div class="pl-2">
                    {% if answer.question.question_type == 'TEXT_AUTO' %}
                        <div class="bg-obsidian-card p-3 rounded border border-obsidian-borderLight mb-3">
                            <span class="text-xs text-txt-faint uppercase font-mono block mb-1">Ваш ответ</span>
                            <p class="text-white font-medium">{{ answer.text_answer|default:"Нет" }}</p>
                        </div>
                    {% elif answer.question.question_type == 'TABLE_AUTO' %}
                        <span class="text-xs text-txt-faint uppercase font-mono block mb-2">Ваш ответ (Таблица)</span>
                        {% with table_data=answer.text_answer|parse_json %}
                        {% if table_data %}
                            <div class="overflow-x-auto mb-3">
                                <table class="w-full border-collapse border border-obsidian-borderLight text-sm text-left">
                                    {% for row in table_data %}
                                    <tr>
                                        <td class="border border-obsidian-borderLight p-2.5 text-txt-secondary bg-obsidian-card">{{ row.0 }}</td>
                                        <td class="border border-obsidian-borderLight p-2.5 text-white bg-obsidian-base">{{ row.1 }}</td>
                                    </tr>
                                    {% endfor %}
                                </table>
                            </div>
                        {% else %}
                            <p class="text-txt-muted mb-3">Нет ответа</p>
                        {% endif %}
                        {% endwith %}
                    {% else %}
                        {% if answer.file_answer %}
                            <p class="text-txt-secondary mb-3 text-sm">
                                <strong class="text-white">Прикрепленный файл:</strong> 
                                <a href="{{ answer.file_answer.url }}" class="inline-flex items-center gap-1 text-accent-blue hover:text-accent-blueHover">
                                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                                    Скачать
                                </a>
                            </p>
                        {% else %}
                            <p class="text-txt-muted mb-3 text-sm">Файл не прикреплен</p>
                        {% endif %}
                    {% endif %}
                    
                    <div class="flex flex-wrap items-center gap-4 text-sm mt-3 pt-3 border-t border-obsidian-borderLight">
                        <div class="flex items-center gap-1.5 {% if answer.is_correct %}text-emerald-400{% elif answer.is_correct == False %}text-rose-400{% else %}text-txt-muted{% endif %} font-medium">
                            {% if answer.is_correct %}
                                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                                Верно
                            {% elif answer.is_correct == False %}
                                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                                Неверно
                            {% else %}
                                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                                Ожидает проверки
                            {% endif %}
                        </div>
                        
                        {% if answer.points is not None %}
                            <div class="px-2 py-0.5 rounded bg-obsidian-card border border-obsidian-borderLight font-mono text-accent-blue text-xs">
                                Баллы: {{ answer.points }}
                            </div>
                        {% endif %}
                    </div>
                    
                    {% if answer.comment %}
                        <div class="mt-3 p-3 text-sm bg-obsidian-card border border-obsidian-borderLight rounded-r-lg border-l-2 border-l-accent-blue">
                            <span class="text-txt-faint text-xs font-mono uppercase block mb-1">Комментарий преподавателя</span>
                            <span class="text-txt-secondary">{{ answer.comment }}</span>
                        </div>
                    {% endif %}
                </div>
            </div>
            {% endfor %}
        </div>
        
    {% elif needs_start %}
        <div class="p-8 text-center rounded-2xl border bg-obsidian-base border-accent-blue/30 shadow-lg relative overflow-hidden">
            <div class="absolute inset-0 bg-accent-blue/5 pointer-events-none"></div>
            
            <svg class="w-16 h-16 mx-auto text-accent-blue mb-5 relative z-10" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"></path>
            </svg>
            
            <h4 class="text-2xl font-bold mb-3 text-white font-heading relative z-10">Задание на время</h4>
            <p class="text-txt-secondary text-base mb-8 max-w-xl mx-auto relative z-10">На выполнение этого задания отводится <strong class="text-white font-mono bg-obsidian-card px-2 py-0.5 rounded border border-obsidian-border">{{ assignment.time_limit }} мин.</strong> Как только вы нажмете кнопку ниже, запустится обратный отсчет. По истечении времени ваши ответы будут отправлены автоматически.</p>
            
            <form method="post" class="relative z-10">
                {% csrf_token %}
                <input type="hidden" name="action" value="start">
                <button type="submit" class="inline-flex items-center gap-2 px-8 py-3.5 bg-accent-blue text-white font-bold rounded-lg shadow-lg shadow-accent-blue/20 hover:bg-accent-blueHover hover:shadow-accent-blue/40 transition-all active:scale-95 font-heading text-lg">
                    <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M14.752 11.168l-3.197-2.132A1 1 0 0010 9.87v4.263a1 1 0 001.555.832l3.197-2.132a1 1 0 000-1.664z"></path><path d="M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>
                    Начать выполнение
                </button>
            </form>
        </div>
        
    {% elif not can_submit %}
        <div class="p-5 rounded-lg border bg-rose-950/20 text-rose-300 border-rose-800/40">
            <h4 class="font-bold mb-2 flex items-center gap-2 font-heading">
                <svg class="w-5 h-5 text-rose-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path></svg>
                Прием ответов завершен
            </h4>
            <p class="text-sm">Вы больше не можете отправлять ответы, так как дедлайн истек или время на выполнение закончилось.</p>
        </div>
        
    {% else %}
        {% if time_left_seconds is not None %}
        <div id="timer-banner" class="sticky top-16 sm:top-20 z-40 mb-8 p-4 rounded-xl border bg-obsidian-base border-accent-blue shadow-lg shadow-accent-blue/10 flex justify-between items-center transition-colors duration-300">
            <div class="flex items-center gap-2.5">
                <svg class="w-6 h-6 text-accent-blue animate-pulse" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>
                <span class="font-medium text-sm sm:text-base text-white">Осталось времени:</span>
            </div>
            <div class="text-2xl sm:text-3xl font-mono font-bold tracking-wider text-white bg-obsidian-card px-3 py-1 rounded-lg border border-obsidian-border" id="countdown-display">
                --:--:--
            </div>
        </div>
        <script>
            document.addEventListener('DOMContentLoaded', function() {
                let timeLeft = {{ time_left_seconds }};
                const display = document.getElementById('countdown-display');
                const banner = document.getElementById('timer-banner');
                const form = document.getElementById('assignment-form');
                
                function updateTimer() {
                    if (timeLeft <= 0) {
                        display.textContent = '00:00:00';
                        display.classList.add('text-rose-400', 'border-rose-500/50', 'bg-rose-950/30');
                        display.classList.remove('text-white', 'bg-obsidian-card', 'border-obsidian-border');
                        banner.classList.add('border-rose-500', 'shadow-rose-500/20');
                        banner.classList.remove('border-accent-blue', 'shadow-accent-blue/10');
                        
                        // Auto submit
                        if (form) {
                            form.onsubmit = null;
                            const btn = form.querySelector('button[type="submit"]');
                            if (btn) btn.disabled = true;
                            
                            const input = document.createElement('input');
                            input.type = 'hidden';
                            input.name = 'auto_submit';
                            input.value = '1';
                            form.appendChild(input);
                            
                            form.submit();
                        }
                        return;
                    }
                    
                    const h = Math.floor(timeLeft / 3600);
                    const m = Math.floor((timeLeft % 3600) / 60);
                    const s = timeLeft % 60;
                    display.textContent = 
                        (h > 0 ? (h < 10 ? '0' + h : h) + ':' : '') + 
                        (m < 10 ? '0' + m : m) + ':' + 
                        (s < 10 ? '0' + s : s);
                        
                    if (timeLeft < 60 && !banner.classList.contains('border-rose-500')) {
                        display.classList.add('text-rose-400');
                        banner.classList.add('border-rose-500', 'bg-rose-950/10');
                        banner.classList.remove('border-accent-blue', 'bg-obsidian-base');
                    }
                    
                    timeLeft--;
                    setTimeout(updateTimer, 1000);
                }
                
                if (timeLeft > 0) {
                    updateTimer();
                }
            });
        </script>
        {% endif %}
        
        <form id="assignment-form" method="post" enctype="multipart/form-data" class="space-y-6">
            {% csrf_token %}
            
            {% for q, field_type, field in question_fields %}
            <div class="p-5 sm:p-6 border rounded-xl bg-obsidian-base border-obsidian-border transition-colors focus-within:border-obsidian-borderLight">
                <div class="flex items-center gap-3 mb-4">
                    <span class="flex items-center justify-center w-8 h-8 rounded-full bg-obsidian-card border border-obsidian-borderLight text-txt-secondary font-mono text-sm font-bold">
                        {{ forloop.counter }}
                    </span>
                    <h4 class="font-semibold text-lg text-white font-heading">Задача</h4>
                </div>
                
                <div class="prose prose-invert max-w-none text-txt-secondary mb-6 font-body">
                    {{ q.text|safe }}
                </div>
                
                {% if q.attached_file %}
                <div class="mb-6">
                    <a href="{{ q.attached_file.url }}" class="inline-flex items-center gap-2 px-4 py-2 bg-obsidian-card border border-obsidian-borderLight text-txt-secondary rounded-lg hover:bg-obsidian-border hover:text-white transition-colors text-sm font-medium" target="_blank">
                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                        Скачать файл к задаче
                    </a>
                </div>
                {% endif %}
                
                <div class="bg-obsidian-card p-5 rounded-lg border border-obsidian-borderLight">
                    {% if field_type == 'table' %}
                        <p class="block text-sm font-medium text-txt-secondary mb-3">Заполните таблицу:</p>
                        <div class="overflow-x-auto">
                            <table class="w-full border-collapse border border-obsidian-borderLight mb-1 text-sm bg-obsidian-base rounded-lg overflow-hidden">
                                {% for row_fields in field %}
                                <tr>
                                    <td class="border border-obsidian-borderLight p-2 w-1/2">
                                        <div class="relative">{{ row_fields.0 }}</div>
                                    </td>
                                    <td class="border border-obsidian-borderLight p-2 w-1/2">
                                        <div class="relative">{{ row_fields.1 }}</div>
                                    </td>
                                </tr>
                                {% endfor %}
                            </table>
                        </div>
                    {% else %}
                        <label for="{{ field.id_for_label }}" class="block text-sm font-medium text-txt-secondary mb-2">{{ field.label }}</label>
                        {{ field }}
                        {% if field.errors %}
                        <p class="mt-2 text-sm text-rose-400 flex items-center gap-1">
                            <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path></svg>
                            {{ field.errors.0 }}
                        </p>
                        {% endif %}
                    {% endif %}
                </div>
            </div>
            {% endfor %}
            
            <div class="pt-6 border-t border-obsidian-border flex justify-end">
                <button type="submit" class="inline-flex items-center gap-2 px-8 py-3 bg-accent-blue text-white font-bold rounded-lg shadow-md hover:bg-accent-blueHover hover:shadow-accent-blue/20 transition-all active:scale-95 font-heading">
                    <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path d="M5 13l4 4L19 7" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></path></svg>
                    Отправить ответ
                </button>
            </div>
        </form>
    {% endif %}
</div>
{% endblock %}