document.addEventListener('DOMContentLoaded', function() {
    const internetBtn = document.getElementById('internetBtn');
    const l2lBtn = document.getElementById('l2lBtn');
    const internetForm = document.getElementById('internetForm');
    const l2lForm = document.getElementById('l2lForm');
    const calculateBtn = document.getElementById('calculateBtn');
    const ipRangeInput = document.getElementById('ipRange');
    const ipTableBody = document.getElementById('ipTableBody');
    const ipTableContainer = document.getElementById('ipTableContainer');
    const generateBtn = document.getElementById('generateBtn');
    const outputContainer = document.getElementById('outputContainer');
    const emailOutput = document.getElementById('emailOutput');
    const copyBtn = document.getElementById('copyBtn');
    // Toggle between service types
    internetBtn.addEventListener('click', function() {
        internetBtn.classList.add('bg-blue-600', 'text-white');
        internetBtn.classList.remove('bg-gray-200', 'text-gray-800');
        l2lBtn.classList.remove('bg-blue-600', 'text-white');
        l2lBtn.classList.add('bg-gray-200', 'text-gray-800');
        internetForm.classList.remove('hidden');
        l2lForm.classList.add('hidden');
        outputContainer.classList.add('hidden');
    });

    // Initialize Feather Icons
    feather.replace();
l2lBtn.addEventListener('click', function() {
        l2lBtn.classList.add('bg-blue-600', 'text-white');
        l2lBtn.classList.remove('bg-gray-200', 'text-gray-800');
        internetBtn.classList.remove('bg-blue-600', 'text-white');
        internetBtn.classList.add('bg-gray-200', 'text-gray-800');
        l2lForm.classList.remove('hidden');
        internetForm.classList.add('hidden');
        outputContainer.classList.add('hidden');
    });

    // Calculate IP addresses
    calculateBtn.addEventListener('click', function() {
        const ipRange = ipRangeInput.value.trim();
        if (!ipRange) {
            alert('Please enter a valid IP range (e.g., 190.220.1.216/29)');
            return;
        }

        try {
            const [baseIp, cidr] = ipRange.split('/');
            const cidrNumber = parseInt(cidr);
            
            if (cidrNumber < 0 || cidrNumber > 32) {
                throw new Error('Invalid CIDR');
            }

            const subnetMask = calculateSubnetMask(cidrNumber);
            const ipParts = baseIp.split('.').map(Number);
            const networkAddress = calculateNetworkAddress(ipParts, cidrNumber);
            const broadcastAddress = calculateBroadcastAddress(networkAddress, cidrNumber);

            // Clear previous results
            ipTableBody.innerHTML = '';

            // Add network address row
            addTableRow('RED LAN', formatIp(networkAddress), subnetMask);

            // Calculate usable IPs (network +1 to broadcast -1)
            const startIp = [...networkAddress];
            incrementIp(startIp);

            // Calculate the number of usable hosts
            const usableHosts = Math.pow(2, 32 - cidrNumber) - 2;
            
            // Add gateway (first usable IP)
            addTableRow('GATEWAY', formatIp(startIp), subnetMask);
            
            // Increment for next IP
            incrementIp(startIp);

            // Add available client IPs
            for (let i = 0; i < usableHosts - 1; i++) {
                if (formatIp(startIp) === formatIp(broadcastAddress)) break;
                addTableRow('DISPONIBLE CLIENTE', formatIp(startIp), subnetMask);
                incrementIp(startIp);
            }

            // Add broadcast address
            addTableRow('BROADCAST', formatIp(broadcastAddress), subnetMask);

            ipTableContainer.classList.remove('hidden');
        } catch (error) {
            alert('Invalid IP range format. Please use format like 190.220.1.216/29');
            console.error(error);
        }
    });

    // Generate email template
    generateBtn.addEventListener('click', function() {
        if (internetBtn.classList.contains('bg-blue-600')) {
            generateInternetEmail();
        } else {
            generateL2LEmail();
        }
        outputContainer.classList.remove('hidden');
    });
    // Copy table to clipboard
    const copyTableBtn = document.getElementById('copyTableBtn');
    copyTableBtn.addEventListener('click', function() {
        let tableText = 'Type\tIP Address\tSubnet Mask\n';
        const rows = ipTableBody.querySelectorAll('tr');
        
        rows.forEach(row => {
            const cells = row.querySelectorAll('td');
            tableText += `${cells[0].textContent}\t${cells[1].textContent}\t${cells[2].textContent}\n`;
        });

        navigator.clipboard.writeText(tableText).then(() => {
            const originalText = copyTableBtn.innerHTML;
            copyTableBtn.innerHTML = '<i data-feather="check" class="mr-2"></i> Copied!';
            setTimeout(() => {
                copyTableBtn.innerHTML = originalText;
                feather.replace();
            }, 2000);
        });
    });
    // Make sure calculate button works immediately
    calculateBtn.addEventListener('click', calculateIPs);

    function calculateIPs() {
        const ipRange = ipRangeInput.value.trim();
        if (!ipRange) {
            alert('Please enter a valid IP range (e.g., 190.220.1.216/29)');
            return;
        }

        try {
            const [baseIp, cidr] = ipRange.split('/');
            const cidrNumber = parseInt(cidr);
            
            if (cidrNumber < 0 || cidrNumber > 32) {
                throw new Error('Invalid CIDR');
            }

            const subnetMask = calculateSubnetMask(cidrNumber);
            const ipParts = baseIp.split('.').map(Number);
            const networkAddress = calculateNetworkAddress(ipParts, cidrNumber);
            const broadcastAddress = calculateBroadcastAddress(networkAddress, cidrNumber);

            // Clear previous results
            ipTableBody.innerHTML = '';

            // Add network address row
            addTableRow('RED LAN', formatIp(networkAddress), subnetMask);

            // Calculate usable IPs (network +1 to broadcast -1)
            const startIp = [...networkAddress];
            incrementIp(startIp);

            // Calculate the number of usable hosts
            const usableHosts = Math.pow(2, 32 - cidrNumber) - 2;
            
            // Add gateway (first usable IP)
            addTableRow('GATEWAY', formatIp(startIp), subnetMask);
            
            // Increment for next IP
            incrementIp(startIp);

            // Add available client IPs
            for (let i = 0; i < usableHosts - 1; i++) {
                if (formatIp(startIp) === formatIp(broadcastAddress)) break;
                addTableRow('DISPONIBLE CLIENTE', formatIp(startIp), subnetMask);
                incrementIp(startIp);
            }

            // Add broadcast address
            addTableRow('BROADCAST', formatIp(broadcastAddress), subnetMask);

            ipTableContainer.classList.remove('hidden');
        } catch (error) {
            alert('Invalid IP range format. Please use format like 190.220.1.216/29');
            console.error(error);
        }
    }
    // Copy email to clipboard
    copyBtn.addEventListener('click', function() {
        const textToCopy = emailOutput.textContent;
        navigator.clipboard.writeText(textToCopy).then(() => {
            const originalText = copyBtn.innerHTML;
            copyBtn.innerHTML = '<i data-feather="check" class="mr-2"></i> Copied!';
            feather.replace();
            setTimeout(() => {
                copyBtn.innerHTML = originalText;
                feather.replace();
            }, 2000);
        }).catch(err => {
            console.error('Failed to copy text: ', err);
            copyBtn.innerHTML = '<i data-feather="x" class="mr-2"></i> Failed!';
            feather.replace();
            setTimeout(() => {
                copyBtn.innerHTML = originalText;
                feather.replace();
            }, 2000);
        });
    });
// Helper functions
function addTableRow(type, ip, mask) {
        if (!ipTableBody) return;
        const row = document.createElement('tr');
row.innerHTML = `
            <td class="font-medium">${type}</td>
            <td class="font-mono">${ip}</td>
            <td class="font-mono">${mask}</td>
        `;
ipTableBody.appendChild(row);
    }

    function calculateSubnetMask(cidr) {
        let mask = [];
        for (let i = 0; i < 4; i++) {
            const bits = Math.min(8, Math.max(0, cidr - i * 8));
            mask.push(256 - Math.pow(2, 8 - bits));
        }
        return mask.join('.');
    }

    function calculateNetworkAddress(ip, cidr) {
        const network = [...ip];
        for (let i = 0; i < 4; i++) {
            const bits = Math.min(8, Math.max(0, cidr - i * 8));
            if (bits === 0) {
                network[i] = 0;
            } else if (bits < 8) {
                network[i] = network[i] & (256 - Math.pow(2, 8 - bits));
            }
        }
        return network;
    }

    function calculateBroadcastAddress(network, cidr) {
        const broadcast = [...network];
        for (let i = 0; i < 4; i++) {
            const bits = Math.min(8, Math.max(0, cidr - i * 8));
            if (bits < 8) {
                broadcast[i] = broadcast[i] | (Math.pow(2, 8 - bits) - 1);
            }
        }
        return broadcast;
    }

    function incrementIp(ip) {
        for (let i = 3; i >= 0; i--) {
            if (ip[i] < 255) {
                ip[i]++;
                break;
            } else {
                ip[i] = 0;
            }
        }
    }

    function formatIp(ipArray) {
        return ipArray.join('.');
    }
    function generateInternetEmail() {
const client = document.getElementById('client').value;
        const serviceNumber = document.getElementById('serviceNumber').value;
        const address = document.getElementById('address').value;
        const bandwidth = document.getElementById('bandwidth').value;
        const ipRange = document.getElementById('ipRange').value;
        
        let emailText = `Subject: Servicio Claro - Alta Internet ${bandwidth} - N° Enlace: ${serviceNumber} ${client}\n\n`;
        emailText += `Estimado Cliente:\n\n`;
        emailText += `Le informamos que se ha realizado con éxito el ALTA a ${bandwidth} del servicio solicitado, ubicado en ${address}\n\n`;
        emailText += `Datos del servicio:\n`;
        emailText += `- Cliente: ${client}\n`;
        emailText += `- N° de enlace: ${serviceNumber}\n`;
        emailText += `- Domicilio: ${address}\n`;
        emailText += `- Ancho de banda: ${bandwidth}\n`;
        emailText += `- Rango IP: ${ipRange}\n\n`;
        // IP Table for email with better formatting
        emailText += `Detalle de configuración IP:\n\n`;
        
        // Calculate column widths
        const rows = ipTableBody.querySelectorAll('tr');
        let maxTypeLength = 0;
        let maxIpLength = 0;
        let maxMaskLength = 0;
        
        rows.forEach(row => {
            const cells = row.querySelectorAll('td');
            maxTypeLength = Math.max(maxTypeLength, cells[0].textContent.length);
            maxIpLength = Math.max(maxIpLength, cells[1].textContent.length);
            maxMaskLength = Math.max(maxMaskLength, cells[2].textContent.length);
        });

        // Add padding to column headers
        const typeHeader = 'Tipo'.padEnd(maxTypeLength + 2);
        const ipHeader = 'Dirección IP'.padEnd(maxIpLength + 2);
        const maskHeader = 'Máscara'.padEnd(maxMaskLength + 2);
        
        // Table header
        emailText += `${typeHeader}${ipHeader}${maskHeader}\n`;
        emailText += `${'-'.repeat(typeHeader.length)}${'-'.repeat(ipHeader.length)}${'-'.repeat(maskHeader.length)}\n`;

        // Table rows
        rows.forEach(row => {
            const cells = row.querySelectorAll('td');
            const type = cells[0].textContent.padEnd(maxTypeLength + 2);
            const ip = cells[1].textContent.padEnd(maxIpLength + 2);
            const mask = cells[2].textContent.padEnd(maxMaskLength + 2);
            emailText += `${type}${ip}${mask}\n`;
        });

        emailText += `\n`;
emailText += `Configuración DNS:\n`;
        emailText += `- DNS Primario: 186.12.238.16\n`;
        emailText += `- DNS Secundario: 186.12.238.15\n\n`;
        
        emailText += `Ante inconvenientes con la puesta en marcha, favor de comunicarse conmigo.\n`;
        emailText += `Posteriormente, por solicitudes o reclamos, Centro de Gestión Empresarial gestionempresarial@claro.com.ar\n\n`;
        emailText += `Atte.\n`;
emailOutput.textContent = emailText;
        feather.replace();
}
    function generateL2LEmail() {
const client = document.getElementById('l2lClient').value;
        const serviceNumber = document.getElementById('l2lServiceNumber').value;
        const bandwidth = document.getElementById('l2lBandwidth').value;
        const siteAAddress = document.getElementById('siteAAddress').value;
        const siteADevice = document.getElementById('siteADevice').value;
        const siteAPort = document.getElementById('siteAPort').value;
        const siteBAddress = document.getElementById('siteBAddress').value;
        const siteBDevice = document.getElementById('siteBDevice').value;
        const siteBPort = document.getElementById('siteBPort').value;

        let emailText = `Subject: Servicio Claro - Alta L2L ${bandwidth} - N° Enlace: ${serviceNumber} ${client}\n\n`;
        emailText += `Estimado Cliente:\n\n`;
        emailText += `Le informamos que se ha realizado con éxito el ALTA a ${bandwidth} del servicio LAN to LAN solicitado.\n\n`;
        emailText += `Datos del servicio:\n`;
        emailText += `Cliente: ${client}\n`;
        emailText += `N° de enlace: ${serviceNumber}\n`;
        emailText += `Ancho de banda: ${bandwidth}\n\n`;
        emailText += `Detalle de extremos:\n\n`;
// Calculate column widths for L2L table
        const siteALabelLength = Math.max('Dirección:'.length, 'Equipo:'.length, 'Puerto:'.length);
        const siteBLabelLength = Math.max('Dirección:'.length, 'Equipo:'.length, 'Puerto:'.length);
        const siteAContentLength = Math.max(siteAAddress.length, siteADevice.length, siteAPort.length);
        const siteBContentLength = Math.max(siteBAddress.length, siteBDevice.length, siteBPort.length);
        
        // Site A table
        emailText += `Extremo A:\n`;
        emailText += `${'Dirección:'.padEnd(siteALabelLength + 2)}${siteAAddress.padEnd(siteAContentLength + 2)}\n`;
        emailText += `${'Equipo:'.padEnd(siteALabelLength + 2)}${siteADevice.padEnd(siteAContentLength + 2)}\n`;
        emailText += `${'Puerto:'.padEnd(siteALabelLength + 2)}${siteAPort.padEnd(siteAContentLength + 2)}\n\n`;
        
        // Site B table
        emailText += `Extremo B:\n`;
        emailText += `${'Dirección:'.padEnd(siteBLabelLength + 2)}${siteBAddress.padEnd(siteBContentLength + 2)}\n`;
        emailText += `${'Equipo:'.padEnd(siteBLabelLength + 2)}${siteBDevice.padEnd(siteBContentLength + 2)}\n`;
        emailText += `${'Puerto:'.padEnd(siteBLabelLength + 2)}${siteBPort.padEnd(siteBContentLength + 2)}\n\n`;
emailText += `Ante inconvenientes con la puesta en marcha, favor de comunicarse conmigo. Posteriormente, por solicitudes o reclamos, Centro de Gestion Empresarial gestionempresarial@claro.com.ar\n\n`;
emailText += `Atte.-`;
emailOutput.textContent = emailText;
    }
});