// Main JavaScript file for Kamani Fish Farms

document.addEventListener('DOMContentLoaded', function() {
    // Mobile navigation toggle
    const navToggle = document.querySelector('.nav-toggle');
    const mainNav = document.getElementById('main-nav');
    
    if (navToggle) {
        navToggle.addEventListener('click', function() {
            mainNav.classList.toggle('active');
        });
    }
    
    // Format currency for all elements with class 'currency'
    function formatCurrency(amount) {
        if (isNaN(amount)) return "₹0.00";
        return new Intl.NumberFormat('en-IN', { 
            style: 'currency', 
            currency: 'INR',
            minimumFractionDigits: 2,
            maximumFractionDigits: 2
        }).format(amount);
    }

    document.querySelectorAll('.currency').forEach(function(element) {
        const amount = parseFloat(element.textContent);
        if (!isNaN(amount)) {
            element.textContent = formatCurrency(amount);
        }
    });

    // Confirm delete actions
    document.querySelectorAll('.delete-confirm').forEach(function(link) {
        link.addEventListener('click', function(e) {
            if (!confirm('Are you sure you want to delete this item?')) {
                e.preventDefault();
            }
        });
    });

    // Make tables responsive
    document.querySelectorAll('table.data-table').forEach(function(table) {
        if (!table.parentElement.classList.contains('table-responsive')) {
            const wrapper = document.createElement('div');
            wrapper.className = 'table-responsive';
            table.parentNode.insertBefore(wrapper, table);
            wrapper.appendChild(table);
        }
    });

    // Dynamic form calculations (for sales form)
    const salesForm = document.getElementById('sales-form');
    if (salesForm) {
        const weightTilapia = document.getElementById('weight_tilapia');
        const weightSmallFish = document.getElementById('weight_small_fish');
        const weightBigFish = document.getElementById('weight_big_fish');
        const includeDelivery = document.getElementById('include_delivery');
        const finalAmount = document.getElementById('final_amount');
        const finalAmountOverride = document.getElementById('final_amount_override');
        const totalAmountDisplay = document.getElementById('total-amount');

        function calculateFinalAmount() {
            // This is a simplified calculation. The actual calculation 
            // is handled by the application logic with buyer rates.
            let total = (parseFloat(weightTilapia.value) || 0) +
                        (parseFloat(weightSmallFish.value) || 0) +
                        (parseFloat(weightBigFish.value) || 0);
            
            if (includeDelivery.checked) {
                total += 100; // Assuming a flat delivery fee of 100
            }

            finalAmount.value = total.toFixed(2);
            if (totalAmountDisplay) {
                totalAmountDisplay.textContent = total.toFixed(2);
            }
        }

        [weightTilapia, weightSmallFish, weightBigFish, includeDelivery].forEach(function(element) {
            if (element) {
                element.addEventListener('input', calculateFinalAmount);
            }
        });

        if (finalAmountOverride) {
            finalAmountOverride.addEventListener('input', function() {
                if (this.value) {
                    const overrideValue = parseFloat(this.value);
                    finalAmount.value = overrideValue.toFixed(2);
                    if (totalAmountDisplay) {
                        totalAmountDisplay.textContent = overrideValue.toFixed(2);
                    }
                } else {
                    calculateFinalAmount();
                }
            });
        }
    }

    // Handle date fields - set default to today if empty
    document.querySelectorAll('input[type="date"]').forEach(function(dateInput) {
        if (!dateInput.value) {
            const today = new Date();
            const year = today.getFullYear();
            const month = String(today.getMonth() + 1).padStart(2, '0');
            const day = String(today.getDate()).padStart(2, '0');
            dateInput.value = `${year}-${month}-${day}`;
        }
    });

    // Improve touch experience for form elements on mobile
    if (window.innerWidth <= 768) {
        document.querySelectorAll('select, input[type="number"]').forEach(function(element) {
            element.addEventListener('touchstart', function(e) {
                e.target.focus();
            });
        });
    }
    
    // Auto-hide flash messages after 5 seconds
    const flashMessages = document.querySelectorAll('.flash-message');
    if (flashMessages.length > 0) {
        setTimeout(function() {
            flashMessages.forEach(function(message) {
                message.style.opacity = '0';
                message.style.transition = 'opacity 0.5s ease';
                setTimeout(function() {
                    message.style.display = 'none';
                }, 500);
            });
        }, 5000);
    }
});