{% extends "layout.html" %}
{% block content %}
<div style="display: flex; flex-wrap: wrap; gap: 2rem; align-items: flex-start;">
    
    <!-- Left Column: Activity Grid (Main Content) -->
    <div style="flex: 1; min-width: 300px;">
        <h2 style="margin-bottom: 1.5rem;">Start Tracking</h2>
        
        <div class="activity-grid">
            {% for act in activities %}
                <div style="position: relative;">
                    <div class="activity-card" 
                         style="background-color: {{ act.color }}"
                         data-name="{{ act.name }}"
                         data-id="{{ act._id }}"
                         data-color="{{ act.color }}"
                         data-subcategories='{{ act.subcategories|default([])|tojson }}'
                         onclick="startActivityImmediate(this)">
                        <span>{{ act.name }}</span>
                    </div>
                    <!-- Small Edit Link -->
                    <a href="{{ url_for('edit_activity', activity_id=act._id) }}" 
                       style="position: absolute; top: 5px; right: 5px; color: rgba(255,255,255,0.8); text-decoration: none; font-size: 0.8rem; padding: 5px;"
                       title="Edit Activity">
                        Edit
                    </a>
                </div>
            {% endfor %}
            
            <!-- Add New Button -->
            <div class="activity-card" style="background-color: #95a5a6; color: white;" onclick="document.getElementById('newActivityForm').style.display='block'">
                <span>+ New Activity</span>
            </div>
        </div>
        
        <!-- Create Activity Form -->
        <div id="newActivityForm" class="card" style="display:none; margin-top: 2rem;">
            <h3>Create New Activity Category</h3>
            <form action="{{ url_for('add_activity') }}" method="POST" onsubmit="prepareTasksList()">
                <label>Name</label>
                <input type="text" name="name" required placeholder="e.g. Household">
                
                <label>Color</label>
                <input type="color" name="color" value="#3498db" style="width:100%; height:40px; border:none;">
                
                <label>Default Tasks (Template)</label>
                <p style="font-size: 0.8rem; color: var(--text-secondary); margin-top: -10px;">
                    These tasks will be created automatically every time you start this activity.
                </p>
                
                <div style="display: flex; gap: 5px; margin-bottom: 10px;">
                    <input type="text" id="newTaskInput" placeholder="Add task name..." style="margin-bottom: 0;">
                    <button type="button" class="btn" style="background: #27ae60;" onclick="addNewTask()">Add</button>
                </div>

                <ul id="newTasksListDisplay" style="list-style: none; padding: 0; margin-bottom: 1rem;"></ul>
                <input type="hidden" name="tasks_list_data" id="tasksListData">
                
                <div style="margin-top: 1rem;">
                    <button type="submit" class="btn">Create</button>
                    <button type="button" class="btn" style="background: var(--text-secondary)" onclick="document.getElementById('newActivityForm').style.display='none'">Cancel</button>
                </div>
            </form>
        </div>
    </div>

    <!-- Right Column: Sidebar (Active Timer) -->
    <!-- Only visible if tracking, or hidden via JS initially if not tracking but we use 'display:none' on the card itself -->
    <div style="flex: 0 0 380px; position: sticky; top: 100px; max-width: 100%;">
        
        <div class="card active-section" id="activeSection" style="{% if not current_entry %}display:none;{% endif %} padding: 1.5rem;">
            <div style="text-align: center; margin-bottom: 1rem;">
                <small style="text-transform: uppercase; font-weight: bold; color: var(--primary-color);">Currently Tracking</small>
                <h3 id="activeName" style="margin: 0.5rem 0; color: {{ current_entry.activity_color if current_entry else '#333' }}">
                    {{ current_entry.activity_name if current_entry else '' }}
                </h3>
            </div>
            
            <!-- Context Info -->
            <div id="activeSubcatContainer" style="text-align: center; {% if not current_entry or not current_entry.subcategory %}display:none;{% endif %} margin-bottom: 10px;">
                <span id="activeSubcatDisplay" style="background: var(--bg-input); padding: 4px 12px; border-radius: 12px; font-size: 0.85rem; color: var(--text-secondary);">
                    {{ current_entry.subcategory if current_entry else '' }}
                </span>
            </div>
            
            <p id="activeNote" style="text-align: center; color: var(--text-secondary); font-style: italic; font-size: 0.9rem; margin-bottom: 1.5rem; {% if not current_entry or not current_entry.note %}display:none;{% endif %}">
                "{{ current_entry.note if current_entry else '' }}"
            </p>

            <div class="timer-display" id="timer" style="margin: 1rem 0 2rem 0;">00:00:00</div>
            
            <!-- Tasks List (Redesigned) -->
            {% if tasks %}
            <div style="margin-bottom: 2rem;">
                <h4 style="font-size: 0.8rem; text-transform: uppercase; color: var(--text-secondary); letter-spacing: 0.05em; border-bottom: 1px solid var(--border-dim); padding-bottom: 5px;">Active Tasks</h4>
                <div class="checklist-container">
                    {% for task in tasks %}
                        <div class="checklist-item {% if task.status == 'completed' %}completed{% endif %}">
                            <input type="checkbox" id="task_{{ task._id }}" 
                                   {% if task.status == 'completed' %}checked{% endif %}
                                   onchange="toggleTask('{{ task._id }}', this)">
                            <label for="task_{{ task._id }}">
                                <a href="{{ url_for('task_detail', task_id=task._id) }}" style="text-decoration: none; color: inherit;">
                                    {{ task.name }}
                                </a>
                            </label>
                        </div>
                    {% endfor %}
                </div>
            </div>
            {% endif %}

            <form action="{{ url_for('stop_timer') }}" method="POST">
                <button type="submit" class="btn btn-danger" style="width: 100%; justify-content: center; padding: 12px;">Stop Activity</button>
            </form>
        </div>
        
    </div>
</div>

<!-- Scripts (Timer, Tasks, Modal) -->
<script>
    // Timer Logic
    let startTime = {% if current_entry %}{{ current_entry.start_time.timestamp() * 1000 }}{% else %}null{% endif %};
    let timerInterval;

    function updateTimer() {
        if (!startTime) return;
        const now = new Date().getTime();
        const diff = now - startTime;
        
        const hours = Math.floor((diff % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
        const minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));
        const seconds = Math.floor((diff % (1000 * 60)) / 1000);
        
        const timerEl = document.getElementById("timer");
        if (timerEl) {
            timerEl.innerHTML = 
                (hours < 10 ? "0" + hours : hours) + ":" +
                (minutes < 10 ? "0" + minutes : minutes) + ":" +
                (seconds < 10 ? "0" + seconds : seconds);
        }
    }

    if (startTime) {
        timerInterval = setInterval(updateTimer, 1000);
        updateTimer(); 
    }

    // AJAX for Tasks
    function toggleTask(taskId, checkbox) {
        const formData = new FormData();
        formData.append('task_id', taskId);
        formData.append('is_checked', checkbox.checked);

        fetch('/complete_task', { method: 'POST', body: formData })
        .then(r => r.json())
        .then(data => {
            const item = checkbox.closest('.checklist-item');
            if(checkbox.checked) {
                item.classList.add('completed');
            } else {
                item.classList.remove('completed');
            }
        });
    }

    // Modal & Start Logic
    function closeStartModal() {
        document.getElementById('startModal').classList.remove('show');
    }

    // Close on backdrop click
    document.getElementById('startModal').addEventListener('click', function(e) {
        if (e.target === this) closeStartModal();
    });

    function startActivityImmediate(element) {
        const id = element.getAttribute('data-id');
        const name = element.getAttribute('data-name');
        const color = element.getAttribute('data-color');
        const subcats = JSON.parse(element.getAttribute('data-subcategories') || '[]');
        
        // 1. Start Background Timer
        fetch('/start_timer_bg/' + id, { method: 'POST' })
        .then(res => res.json())
        .then(data => {
            if(data.status === 'success') {
                // 2. Start Local Timer UI
                startTime = new Date(data.start_time).getTime();
                clearInterval(timerInterval);
                timerInterval = setInterval(updateTimer, 1000);
                updateTimer();

                // Update UI State
                document.getElementById('activeSection').style.display = 'block';
                document.getElementById('activeName').innerText = name;
                document.getElementById('activeName').style.color = color;
                
                // Reset Note/Subcat display
                document.getElementById('activeNote').style.display = 'none';
                document.getElementById('activeSubcatContainer').style.display = 'none';

                // 3. Open Modal for Details
                openDetailsModal(name, subcats);
            }
        });
    }

    function openDetailsModal(name, subcats) {
        document.getElementById('modalTitle').innerText = name + " Started";
        
        // Setup Subcategories
        const subcatContainer = document.getElementById('subcategoryContainer');
        const select = document.getElementById('modalSubcatSelect');
        select.innerHTML = '<option value="">-- None --</option>'; 
        
        if (subcats && subcats.length > 0) {
            subcatContainer.style.display = 'block';
            subcats.forEach(sc => {
                const opt = document.createElement('option');
                opt.value = sc;
                opt.innerText = sc;
                select.appendChild(opt);
            });
        } else {
            subcatContainer.style.display = 'none';
        }
        
        // Show Modal
        document.getElementById('startModal').classList.add('show');
        document.querySelector('#startForm input[name="note"]').focus();
    }
    
    // New Task List Logic for Activity Creation form (Reusing existing script)
    let newActivityTasks = [];
    function addNewTask() {
        const input = document.getElementById('newTaskInput');
        const val = input.value.trim();
        if (val) {
            newActivityTasks.push(val);
            input.value = '';
            renderNewActivityTasks();
        }
    }
    function removeNewTask(index) {
        newActivityTasks.splice(index, 1);
        renderNewActivityTasks();
    }
    function renderNewActivityTasks() {
        const list = document.getElementById('newTasksListDisplay');
        list.innerHTML = '';
        newActivityTasks.forEach((item, index) => {
            const li = document.createElement('li');
            li.style.background = '#f7f7f5';
            li.style.border = '1px solid var(--border-dim)';
            li.style.margin = '5px 0';
            li.style.padding = '8px';
            li.style.borderRadius = '4px';
            li.style.display = 'flex';
            li.style.justifyContent = 'space-between';
            li.style.alignItems = 'center';
            li.style.fontSize = '0.9rem';
            li.innerHTML = `<span>${item}</span><span onclick="removeNewTask(${index})" style="cursor: pointer; color: var(--danger-color); font-weight: bold; padding: 0 5px;">&times;</span>`;
            list.appendChild(li);
        });
    }
    function prepareTasksList() {
        document.getElementById('tasksListData').value = newActivityTasks.join(',');
    }
</script>

<!-- Custom Start Modal (Hidden by default) -->
<div id="startModal" class="modal-backdrop">
    <div class="modal-card">
        <h3 id="modalTitle" style="margin-bottom: 1.5rem;">Activity Started</h3>
        <form id="startForm" action="{{ url_for('update_active_entry') }}" method="POST">
            <div id="subcategoryContainer" style="display: none; margin-bottom: 1rem;">
                <label>Subcategory / Context</label>
                <select name="subcategory" id="modalSubcatSelect" style="width: 100%; padding: 0.5rem;">
                    <option value="">-- None --</option>
                </select>
            </div>
            <label>Note (Optional)</label>
            <input type="text" name="note" placeholder="What are you working on?" autocomplete="off">
            <div style="margin-top: 2rem; display: flex; justify-content: space-between;">
                <button type="button" class="btn" style="background: transparent; color: var(--text-secondary); border: 1px solid var(--border-dim);" onclick="closeStartModal()">Skip</button>
                <button type="submit" class="btn" style="background: #27ae60;">Update Details</button>
            </div>
        </form>
    </div>
</div>
{% endblock %}