// App Logic for Control de Gastos

// Toast notification system
function showToast(message, type = 'info') {
    const container = document.getElementById('toast-container');
    if (!container) return;

    const toast = document.createElement('div');
    toast.className = 'toast';
    
    if (type === 'success') {
        toast.style.borderLeftColor = 'var(--accent-secondary)';
    } else if (type === 'danger') {
        toast.style.borderLeftColor = 'var(--danger)';
    }

    toast.innerHTML = `<div>${message}</div>`;
    container.appendChild(toast);

    // Trigger animation
    setTimeout(() => {
        toast.classList.add('show');
    }, 10);

    // Remove toast after 5 seconds
    setTimeout(() => {
        toast.classList.remove('show');
        setTimeout(() => {
            if (container.contains(toast)) {
                container.removeChild(toast);
            }
        }, 300);
    }, 5000);
}

// WebSocket connection for real-time updates
let wsReconnectAttempts = 0;
const maxWsReconnectAttempts = 5;

function connectWebSocket() {
    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
    const wsUrl = `${protocol}//${window.location.host}/ws/expenses/`;
    
    // We only connect if we are not on the login page
    if (document.querySelector('.login-page')) return;
    
    const ws = new WebSocket(wsUrl);

    ws.onopen = function(e) {
        console.log('WebSocket connected');
        wsReconnectAttempts = 0;
    };

    ws.onmessage = function(e) {
        const data = JSON.parse(e.data);
        const action = data.action;
        const expense = data.expense;
        const tbody = document.getElementById('expenses-table-body');
        
        if (!tbody || !expense) return;

        if (action === 'created') {
            const tr = document.createElement('tr');
            tr.id = `expense-row-${expense.id}`;
            tr.innerHTML = `
                <td>${expense.date}</td>
                <td>${expense.project}</td>
                <td>${expense.category}</td>
                ${document.querySelector('th:nth-child(4)') && document.querySelector('th:nth-child(4)').textContent === 'Descripción' ? `<td>${expense.description || ''}</td>` : ''}
                <td>$${expense.amount}</td>
                <td>${expense.user}</td>
                ${document.querySelector('th:nth-child(7)') ? `
                <td>
                    <div style="display: flex; gap: 0.5rem;">
                        <span style="font-size:0.8rem; color:var(--text-secondary);">Recarga para ver acciones</span>
                    </div>
                </td>` : ''}
            `;
            
            // Add animation class
            tr.style.backgroundColor = 'rgba(0, 212, 170, 0.2)';
            tr.style.transition = 'background-color 2s ease';
            
            tbody.insertBefore(tr, tbody.firstChild);
            
            // Remove highlight after animation
            setTimeout(() => {
                tr.style.backgroundColor = '';
            }, 2000);
            
            showToast('Nuevo gasto registrado', 'success');
        } 
        else if (action === 'updated') {
            const row = document.getElementById(`expense-row-${expense.id}`);
            if (row) {
                // Flash the row
                row.style.backgroundColor = 'rgba(108, 99, 255, 0.2)';
                row.style.transition = 'background-color 2s ease';
                
                setTimeout(() => {
                    row.style.backgroundColor = '';
                }, 2000);
                
                showToast('Gasto actualizado', 'info');
            }
        }
        else if (action === 'deleted') {
            const row = document.getElementById(`expense-row-${expense.id}`);
            if (row) {
                row.style.transform = 'translateX(100%)';
                row.style.opacity = '0';
                row.style.transition = 'all 0.3s ease';
                
                setTimeout(() => {
                    if (row.parentNode) {
                        row.parentNode.removeChild(row);
                    }
                }, 300);
                
                showToast('Gasto eliminado', 'danger');
            }
        }
    };

    ws.onclose = function(e) {
        console.error('WebSocket closed unexpectedly');
        
        if (wsReconnectAttempts < maxWsReconnectAttempts) {
            wsReconnectAttempts++;
            const timeout = Math.min(1000 * Math.pow(2, wsReconnectAttempts), 30000);
            console.log(`Attempting reconnect in ${timeout}ms...`);
            setTimeout(connectWebSocket, timeout);
        }
    };
}

document.addEventListener('DOMContentLoaded', () => {
    connectWebSocket();
    
    // Convert CSRF token for fetch requests if needed later
    const csrfToken = document.querySelector('meta[name="csrf-token"]')?.getAttribute('content');
});