{% extends "base.html" %}
{% block content %}
<div class="row">
    <div class="col-md-12">
        <button type="button" class="btn btn-primary btn-lg mb-4" data-bs-toggle="modal" data-bs-target="#addMealModal">
            <i class="bi bi-plus-circle"></i> Create New Meal
        </button>
        
        <h3>Meals</h3>
        <div class="table-responsive">
            <table class="table table-striped">
                <thead>
                    <tr>
                        <th><input type="checkbox" id="select-all-meals" onclick="toggleAllMeals(this)"></th>
                        <th>Name</th>
                        <th>Food Items</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    {% for meal in meals %}
                    <tr>
                        <td><input type="checkbox" name="selected_meals" value="{{ meal.id }}"></td>
                        <td>{{ meal.name }}</td>
                        <td>
                            {% if meal.meal_foods %}
                                <ul class="list-unstyled">
                                {% for meal_food in meal.meal_foods %}
                                    <li>{{ "%.2f" | format(meal_food.quantity) }}g × {{ meal_food.food.name }}</li>
                                {% endfor %}
                                </ul>
                            {% else %}
                                <em>No foods added</em>
                            {% endif %}
                        </td>
                        <td>
                            <button type="button" class="btn btn-sm btn-outline-primary"
                                    onclick="manageMeal({{ meal.id }})">
                                <i class="bi bi-pencil-square"></i> Manage
                            </button>
                            <button type="button" class="btn btn-sm btn-outline-info"
                                    onclick="cloneMeal({{ meal.id }})">
                                <i class="bi bi-front"></i> Clone
                            </button>
                        </td>
                    </tr>
                    {% endfor %}
                </tbody>
            </table>
        </div>
        <button class="btn btn-danger mt-3" onclick="deleteSelectedMeals()">
            <i class="bi bi-trash"></i> Delete Selected Meals
        </button>
    </div>
</div>

<!-- Add Meal Modal -->
<div class="modal fade" id="addMealModal" tabindex="-1" aria-labelledby="addMealModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="addMealModalLabel">Create New Meal</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form id="addMealForm" action="/meals/add" method="post">
                    <div class="mb-3">
                        <label class="form-label">Meal Name</label>
                        <input type="text" class="form-control" name="name" required>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" onclick="submitMealForm('add')">Create Meal</button>
            </div>
        </div>
    </div>
</div>

{% include 'modals/manage_meal.html' %}

<script>
function toggleAllMeals(source) {
    const checkboxes = document.querySelectorAll('input[name="selected_meals"]');
    checkboxes.forEach(checkbox => checkbox.checked = source.checked);
}

// Manage meal function
async function manageMeal(mealId) {
    document.getElementById('manage_meal_id').value = mealId;
    document.getElementById('meal_id_for_food').value = mealId;

    try {
        const response = await fetch(`/meals/${mealId}`);
        const meal = await response.json();

        if (meal.status === 'success') {
            document.getElementById('manage_meal_name').value = meal.name;
            document.getElementById('manageMealModalLabel').textContent = `Manage Meal: ${meal.name}`;
            
            await loadCurrentMealFoods(mealId);
            new bootstrap.Modal(document.getElementById('manageMealModal')).show();
        } else {
            alert('Error fetching meal details: ' + meal.message);
        }
    } catch (error) {
        alert('Error fetching meal details: ' + error.message);
    }
}

// Load current meal foods
async function loadCurrentMealFoods(mealId) {
    try {
        const response = await fetch(`/meals/${mealId}/foods`);
        const foods = await response.json();
        
        const container = document.getElementById('currentMealFoods');
        if (foods.length === 0) {
            container.innerHTML = '<em>No foods added yet</em>';
        } else {
            container.innerHTML = foods.map(mf => `
                <div class="d-flex justify-content-between align-items-center mb-2 p-2 bg-light rounded">
                    <div class="input-group">
                        <input type="number" step="1" class="form-control" value="${mf.quantity}" data-meal-food-id="${mf.id}" onchange="updateFoodQuantity(this)">
                        <span class="input-group-text">${mf.food_name} (g)</span>
                        <button class="btn btn-outline-danger" onclick="removeFoodFromMeal(${mf.id})">
                            <i class="bi bi-trash"></i>
                        </button>
                    </div>
                </div>
            `).join('');
        }
    } catch (error) {
        console.error('Error loading meal foods:', error);
    }
}

// Add food to meal
async function addFoodToMeal() {
    const form = document.getElementById('addFoodToMealForm');
    const formData = new FormData(form);
    const mealId = formData.get('meal_id');
    
    try {
        const response = await fetch(`/meals/${mealId}/add_food`, {
            method: 'POST',
            body: formData
        });
        
        const result = await response.json();
        
        if (result.status === 'success') {
            // Reset form and reload current foods
            form.reset();
            document.getElementById('meal_id_for_food').value = mealId;
            await loadCurrentMealFoods(mealId);
        } else {
            alert('Error adding food: ' + result.message);
        }
    } catch (error) {
        alert('Error adding food: ' + error.message);
    }
}

// Remove food from meal
async function removeFoodFromMeal(mealFoodId) {
    if (confirm('Remove this food from the meal?')) {
        try {
            const response = await fetch(`/meals/remove_food/${mealFoodId}`, {
                method: 'DELETE'
            });
            
            const result = await response.json();
            
            if (result.status === 'success') {
                const mealId = document.getElementById('meal_id_for_food').value;
                await loadCurrentMealFoods(mealId);
            } else {
                alert('Error removing food: ' + result.message);
            }
        } catch (error) {
            alert('Error removing food: ' + error.message);
        }
    }
}

// Submit meal form (add or manage)
async function submitMealForm(action) {
    const form = document.getElementById(action + 'MealForm');
    if (action === 'manage') { // Handle name update separately
        const mealId = document.getElementById('manage_meal_id').value;
        const newName = document.getElementById('manage_meal_name').value;
        const formData = new FormData();
        formData.append('meal_id', mealId);
        formData.append('name', newName);

        try {
            const response = await fetch('/meals/edit', {
                method: 'POST',
                body: formData
            });
            const result = await response.json();
            if (result.status === 'success') {
                document.getElementById('manageMealModalLabel').textContent = `Manage Meal: ${newName}`;
                // No page reload, just confirmation
                alert('Meal name updated successfully!');
            } else {
                alert('Error: ' + result.message);
            }
        } catch (error) {
            alert('Error updating meal name: ' + error.message);
        }
        return;
    }
    const formData = new FormData(form);
    
    try {
        const response = await fetch(form.action, {
            method: 'POST',
            body: formData
        });
        
        const result = await response.json();
        
        if (result.status === 'success') {
            // Close modal and reload page
            bootstrap.Modal.getInstance(document.getElementById(action + 'MealModal')).hide();
            location.reload();
        } else {
            alert('Error: ' + result.message);
        }
    } catch (error) {
        alert('Error submitting form: ' + error.message);
    }
}

// Delete selected meals
async function deleteSelectedMeals() {
    const selected = Array.from(document.querySelectorAll('input[name="selected_meals"]:checked'))
        .map(checkbox => checkbox.value);

    if (selected.length === 0) {
        alert('Please select meals to delete');
        return;
    }

    if (confirm(`Delete ${selected.length} selected meals?`)) {
        try {
            const response = await fetch('/meals/delete', {
                method: 'POST',
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify({meal_ids: selected})
            });

            const result = await response.json();

            if (response.ok) {
                window.location.reload();
            } else {
                alert(`Delete failed: ${result.message || response.status}`);
            }
        } catch (error) {
            alert('Delete failed: ' + error.message);
        }
    }
}

// Clone meal function
async function cloneMeal(mealId) {
    if (confirm('Are you sure you want to clone this meal?')) {
        try {
            const response = await fetch(`/meals/clone/${mealId}`, {
                method: 'POST'
            });
            const result = await response.json();
            if (result.status === 'success') {
                location.reload();
            } else {
                alert('Error cloning meal: ' + result.message);
            }
        } catch (error) {
            alert('Error cloning meal: ' + error.message);
        }
    }
}
// Update food quantity
async function updateFoodQuantity(input) {
    const mealFoodId = input.dataset.mealFoodId;
    const quantity = input.value;
    const formData = new FormData();
    formData.append('meal_food_id', mealFoodId);
    formData.append('quantity', quantity);

    try {
        const response = await fetch('/meals/update_food_quantity', {
            method: 'POST',
            body: formData
        });
        const result = await response.json();
        if (result.status !== 'success') {
            alert('Error updating quantity: ' + result.message);
        }
    } catch (error) {
        alert('Error updating quantity: ' + error.message);
    }
}
</script>
{% endblock %}