const API_BASE = window.location.origin;
let selectedVM = null;

// Initialize dashboard
document.addEventListener('DOMContentLoaded', () => {
    loadVMs();
    loadISOsForSelect();
    
    // Initialize sidebar state for mobile
    const sidebar = document.querySelector('.sidebar');
    if (window.innerWidth <= 768) {
        sidebar.classList.add('hidden-mobile');
    }
    
    // Create VM Form
    document.getElementById('createVMForm').addEventListener('submit', createVM);
});

// Get badge class based on VM state
function getStateClass(state) {
    switch (state) {
        case 'running': return 'badge-running';
        case 'shut off': return 'badge-off';
        case 'paused': return 'badge-paused';
        case 'crashed': return 'badge-error';
        default: return 'bg-light text-dark';
    }
}

// Get icon for state
function getStateIcon(state) {
    switch (state) {
        case 'running': return '<i class="bi bi-play-circle-fill"></i>';
        case 'shut off': return '<i class="bi bi-power"></i>';
        case 'paused': return '<i class="bi bi-pause-circle-fill"></i>';
        default: return '<i class="bi bi-question-circle"></i>';
    }
}

// Load VMs from API
async function loadVMs() {
    try {
        const response = await fetch(`${API_BASE}/vms`);
        const data = await response.json();
        const vmList = document.getElementById('vmList');
        
        if (!data.vms || data.vms.length === 0) {
            vmList.innerHTML = '<p style="text-align: center; color: rgba(255,255,255,0.7); margin-top: 20px;">No hay máquinas virtuales</p>';
            return;
        }
        
        vmList.innerHTML = data.vms.map(vm => `
            <div class="vm-item ${selectedVM === vm.name ? 'active' : ''}" onclick="selectVM('${vm.name}')">
                <div class="vm-item-name">
                    <div>${vm.name}</div>
                    <small style="opacity: 0.9;">${vm.id !== -1 ? 'ID: ' + vm.id : 'Detenida'}</small>
                </div>
                <span class="vm-item-badge badge ${getStateClass(vm.state)}">${vm.state}</span>
            </div>
        `).join('');
    } catch (error) {
        console.error('Error loading VMs:', error);
    }
}

// Select a VM and show details
async function selectVM(vmName) {
    selectedVM = vmName;
    loadVMs(); // Refresh to highlight selected
    
    try {
        const response = await fetch(`${API_BASE}/vms/${vmName}/info`);
        const vm = await response.json();
        
        if (vm.error) {
            showError(vm.error);
            return;
        }
        
        displayVMDetails(vm, vmName);
    } catch (error) {
        console.error('Error loading VM info:', error);
        showError('Error al cargar información de la VM');
    }
}

// Display VM details
function displayVMDetails(vm, vmName) {
    const contentArea = document.getElementById('contentArea');
    const topBar = document.getElementById('currentVMName');
    const topBarActions = document.getElementById('topBarActions');
    
    topBar.textContent = vmName;
    
    // Build status badge
    const statusBadge = `<span class="badge ${getStateClass(vm.state)} p-2">${vm.state}</span>`;
    
    // Build action buttons
    const actionButtons = `
        <div>
            ${vm.state === 'running' ? `
                <button class="btn btn-sm btn-warning" onclick="stopVM('${vmName}')">
                    <i class="bi bi-stop-circle"></i> Detener
                </button>
                <button class="btn btn-sm btn-info" onclick="openConsole('${vmName}')">
                    <i class="bi bi-display"></i> Consola
                </button>
            ` : `
                <button class="btn btn-sm btn-success" onclick="startVM('${vmName}')">
                    <i class="bi bi-play-circle"></i> Iniciar
                </button>
            `}
            <button class="btn btn-sm btn-danger" onclick="deleteVMConfirm('${vmName}')">
                <i class="bi bi-trash"></i> Eliminar
            </button>
        </div>
    `;
    
    topBarActions.innerHTML = actionButtons;
    
    // Build content
    const disksHTML = vm.disks && vm.disks.length > 0 ? vm.disks.map(disk => `
        <li>
            <strong>${disk.target}</strong> (${disk.driver}) - ${disk.source}
        </li>
    `).join('') : '<li>Sin discos</li>';
    
    const interfacesHTML = vm.interfaces && vm.interfaces.length > 0 ? vm.interfaces.map(iface => `
        <li>
            <strong>MAC:</strong> ${iface.mac}<br>
            <strong>Red:</strong> ${iface.network}
        </li>
    `).join('') : '<li>Sin interfaces</li>';
    
    contentArea.innerHTML = `
        <ul class="nav nav-tabs" role="tablist">
            <li class="nav-item">
                <a class="nav-link active" id="overview-tab" data-bs-toggle="tab" href="#overview">Resumen</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" id="disks-tab" data-bs-toggle="tab" href="#disks">Discos</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" id="network-tab" data-bs-toggle="tab" href="#network">Red</a>
            </li>
        </ul>
        
        <div class="tab-content">
            <!-- Overview Tab -->
            <div class="tab-pane fade show active" id="overview">
                <div class="vm-details">
                    <div class="card">
                        <div class="card-header">
                            <h6 class="card-title mb-0"><i class="bi bi-gear"></i> Configuración</h6>
                        </div>
                        <div class="card-body">
                            <div class="info-item">
                                <div class="info-label">ID de Dominio</div>
                                <div class="info-value">${vm.id !== -1 ? vm.id : 'N/A (Parada)'}</div>
                            </div>
                            <div class="info-item">
                                <div class="info-label">Estado</div>
                                <div class="info-value">${statusBadge}</div>
                            </div>
                            <div class="info-item">
                                <div class="info-label">Procesadores</div>
                                <div class="info-value">${vm.cpus} CPU${vm.cpus !== 1 ? 's' : ''}</div>
                            </div>
                            <div class="info-item">
                                <div class="info-label">Memoria RAM</div>
                                <div class="info-value">${vm.memory} MiB</div>
                            </div>
                        </div>
                    </div>
                    
                    <div class="card">
                        <div class="card-header">
                            <h6 class="card-title mb-0"><i class="bi bi-display"></i> Display</h6>
                        </div>
                        <div class="card-body">
                            <div class="info-item">
                                <div class="info-label">Puerto VNC</div>
                                <div class="info-value">${vm.vnc_port ? vm.vnc_port : 'No asignado'}</div>
                            </div>
                            <div class="info-item">
                                <div class="info-label">Dirección</div>
                                <div class="info-value">${vm.vnc_port ? `localhost:${vm.vnc_port}` : 'N/A'}</div>
                            </div>
                        </div>
                    </div>
                </div>
                
                <div class="actions-group">
                    <h5><i class="bi bi-lightning"></i> Acciones</h5>
                    <button class="btn btn-sm btn-primary btn-action" onclick="openBootOrderModal('${vmName}')">
                        <i class="bi bi-arrow-repeat"></i> Configurar Arranque
                    </button>
                    <button class="btn btn-sm btn-info btn-action" onclick="openAddDiskModal('${vmName}')" ${vm.state !== 'shut off' ? 'disabled' : ''}>
                        <i class="bi bi-plus-circle"></i> Agregar Disco
                    </button>
                    <button class="btn btn-sm btn-secondary btn-action" onclick="downloadVMConfig('${vmName}')">
                        <i class="bi bi-download"></i> Descargar XML
                    </button>
                </div>
            </div>
            
            <!-- Disks Tab -->
            <div class="tab-pane fade" id="disks">
                <div class="card">
                    <div class="card-header">
                        <h6 class="card-title mb-0"><i class="bi bi-hdd"></i> Discos</h6>
                    </div>
                    <div class="card-body">
                        <ul class="list-unstyled">
                            ${disksHTML}
                        </ul>
                    </div>
                </div>
            </div>
            
            <!-- Network Tab -->
            <div class="tab-pane fade" id="network">
                <div class="card">
                    <div class="card-header">
                        <h6 class="card-title mb-0"><i class="bi bi-diagram-3"></i> Interfaces de Red</h6>
                    </div>
                    <div class="card-body">
                        <ul class="list-unstyled">
                            ${interfacesHTML}
                        </ul>
                    </div>
                </div>
            </div>
        </div>
    `;
}

// Show error message
function showError(message) {
    const contentArea = document.getElementById('contentArea');
    contentArea.innerHTML = `
        <div class="alert alert-danger" role="alert">
            <i class="bi bi-exclamation-circle"></i> ${message}
        </div>
    `;
}

// Open Create VM Modal
function openCreateVMModal() {
    const modal = new bootstrap.Modal(document.getElementById('createVMModal'));
    modal.show();
}

// Create VM
async function createVM(e) {
    e.preventDefault();
    
    const name = document.getElementById('name').value;
    const memory = document.getElementById('memory').value;
    const disk_size = document.getElementById('disk_size').value;
    const cpus = document.getElementById('cpus').value;
    const iso = document.getElementById('iso').value;
    
    if (!iso) {
        alert('Por favor selecciona una ISO');
        return;
    }
    
    try {
        const response = await fetch(`${API_BASE}/vms?name=${name}&memory=${memory}&disk_size=${disk_size}&cpus=${cpus}&iso=${iso}`, {
            method: 'POST'
        });
        
        let result;
        try {
            result = await response.json();
        } catch {
            result = { error: `Server error: ${response.status}` };
        }
        
        if (response.ok) {
            alert(result.message || 'VM creada correctamente');
            document.getElementById('createVMForm').reset();
            bootstrap.Modal.getInstance(document.getElementById('createVMModal')).hide();
            loadVMs();
        } else {
            alert(result.error || 'Error al crear VM');
        }
    } catch (error) {
        console.error('Error:', error);
        alert(`Error: ${error.message}`);
    }
}

// Load ISOs for select
async function loadISOsForSelect() {
    try {
        const response = await fetch(`${API_BASE}/isos`);
        const data = await response.json();
        const select = document.getElementById('iso');
        
        select.innerHTML = '<option value="">Selecciona una ISO</option>';
        if (data.isos && data.isos.length > 0) {
            data.isos.forEach(iso => {
                select.innerHTML += `<option value="${iso.path}">${iso.name}</option>`;
            });
        }
    } catch (error) {
        console.error('Error loading ISOs:', error);
    }
}

// Start VM
async function startVM(vmName) {
    try {
        const response = await fetch(`${API_BASE}/vms/${vmName}/start`);
        const result = await response.json();
        
        if (response.ok) {
            loadVMs();
            if (selectedVM === vmName) {
                selectVM(vmName);
            }
        } else {
            alert(result.error || 'Error al iniciar VM');
        }
    } catch (error) {
        console.error('Error:', error);
        alert(`Error: ${error.message}`);
    }
}

// Stop VM
async function stopVM(vmName) {
    if (confirm(`¿Estás seguro de que quieres detener ${vmName}?`)) {
        try {
            const response = await fetch(`${API_BASE}/vms/${vmName}/stop`);
            const result = await response.json();
            
            if (response.ok) {
                loadVMs();
                if (selectedVM === vmName) {
                    selectVM(vmName);
                }
            } else {
                alert(result.error || 'Error al detener VM');
            }
        } catch (error) {
            console.error('Error:', error);
            alert(`Error: ${error.message}`);
        }
    }
}

// Delete VM
async function deleteVMConfirm(vmName) {
    if (confirm(`¿Estás seguro de que quieres eliminar ${vmName}? Esta acción no se puede deshacer.`)) {
        try {
            const response = await fetch(`${API_BASE}/vms/${vmName}`, { method: 'DELETE' });
            const result = await response.json();
            
            if (response.ok) {
                alert('VM eliminada correctamente');
                selectedVM = null;
                loadVMs();
                document.getElementById('contentArea').innerHTML = `
                    <div class="empty-state">
                        <i class="bi bi-inbox"></i>
                        <h5>Selecciona una máquina virtual</h5>
                        <p>Haz clic en una VM del panel lateral para ver sus detalles</p>
                    </div>
                `;
            } else {
                alert(result.error || 'Error al eliminar VM');
            }
        } catch (error) {
            console.error('Error:', error);
            alert(`Error: ${error.message}`);
        }
    }
}

// Open Boot Order Modal
function openBootOrderModal(vmName) {
    const html = `
        <div class="modal fade" id="bootOrderModal" tabindex="-1">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title">Configurar Orden de Arranque - ${vmName}</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                    </div>
                    <form id="bootOrderForm">
                        <div class="modal-body">
                            <div class="mb-3">
                                <label for="bootOrderInput" class="form-label">Orden de Arranque</label>
                                <input type="text" class="form-control" id="bootOrderInput" placeholder="hd,cdrom" required>
                                <small class="form-text text-muted">Separados por comas: hd, cdrom, network</small>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancelar</button>
                            <button type="submit" class="btn btn-primary">Guardar</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    `;
    
    document.body.insertAdjacentHTML('beforeend', html);
    const modal = new bootstrap.Modal(document.getElementById('bootOrderModal'));
    
    document.getElementById('bootOrderForm').addEventListener('submit', async (e) => {
        e.preventDefault();
        const order = document.getElementById('bootOrderInput').value.split(',').map(s => s.trim());
        
        try {
            const response = await fetch(`${API_BASE}/vms/${vmName}/boot-order`, {
                method: 'PUT',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ order })
            });
            
            const result = await response.json();
            if (response.ok) {
                alert('Orden de arranque actualizado');
                modal.hide();
                document.getElementById('bootOrderModal').remove();
            } else {
                alert(result.error || 'Error al actualizar');
            }
        } catch (error) {
            alert(`Error: ${error.message}`);
        }
    });
    
    modal.show();
}

// Open Add Disk Modal
function openAddDiskModal(vmName) {
    const html = `
        <div class="modal fade" id="addDiskModal" tabindex="-1">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title">Agregar Disco - ${vmName}</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                    </div>
                    <div class="alert alert-warning m-3">
                        <small><strong>⚠️ Importante:</strong> La VM debe estar parada y el nombre del disco no debe existir</small>
                    </div>
                    <form id="addDiskFormModal">
                        <div class="modal-body">
                            <div class="mb-3">
                                <label for="diskNameInput" class="form-label">Nombre del Disco</label>
                                <input type="text" class="form-control" id="diskNameInput" placeholder="datos" required>
                            </div>
                            <div class="mb-3">
                                <label for="diskSizeInput" class="form-label">Tamaño (GB)</label>
                                <input type="number" class="form-control" id="diskSizeInput" value="10" min="1" required>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancelar</button>
                            <button type="submit" class="btn btn-primary">Agregar</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    `;
    
    document.body.insertAdjacentHTML('beforeend', html);
    const modal = new bootstrap.Modal(document.getElementById('addDiskModal'));
    
    document.getElementById('addDiskFormModal').addEventListener('submit', async (e) => {
        e.preventDefault();
        const disk_name = document.getElementById('diskNameInput').value;
        const disk_size = document.getElementById('diskSizeInput').value;
        
        try {
            const response = await fetch(`${API_BASE}/vms/${vmName}/add-disk?disk_name=${disk_name}&disk_size=${disk_size}`, {
                method: 'POST'
            });
            
            let result;
            try {
                result = await response.json();
            } catch {
                result = { error: 'Error del servidor' };
            }
            
            if (response.ok) {
                alert(result.message || 'Disco agregado correctamente');
                modal.hide();
                document.getElementById('addDiskModal').remove();
                selectVM(vmName); // Refresh
            } else {
                alert(result.error || 'Error al agregar disco');
            }
        } catch (error) {
            alert(`Error: ${error.message}`);
        }
    });
    
    modal.show();
}

// Open Console
function openConsole(vmName) {
    fetch(`${API_BASE}/console/${vmName}`)
        .then(response => response.json())
        .then(data => {
            if (data.url) {
                window.open(data.url);
            } else {
                alert(data.error || 'Error al abrir consola');
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Error al abrir consola');
        });
}

// Open ISO Management Modal
function openISOManagementModal() {
    const modal = new bootstrap.Modal(document.getElementById('isoManagementModal'));
    loadISOs();
    setupUploadISOForm();
    modal.show();
}

// Load ISOs for management
async function loadISOs() {
    try {
        const response = await fetch(`${API_BASE}/isos`);
        const data = await response.json();
        const tbody = document.getElementById('isoTableBody');
        
        if (!data.isos || data.isos.length === 0) {
            tbody.innerHTML = '<tr><td colspan="2" class="text-center text-muted">No hay ISOs subidas</td></tr>';
            return;
        }
        
        tbody.innerHTML = data.isos.map(iso => `
            <tr>
                <td>
                    <i class="bi bi-disc"></i> ${iso.name}
                </td>
                <td>
                    <button class="btn btn-sm btn-danger" onclick="deleteISO('${iso.name}')">
                        <i class="bi bi-trash"></i> Eliminar
                    </button>
                </td>
            </tr>
        `).join('');
    } catch (error) {
        console.error('Error loading ISOs:', error);
        document.getElementById('isoTableBody').innerHTML = '<tr><td colspan="2" class="text-center text-danger">Error al cargar ISOs</td></tr>';
    }
}

// Setup ISO upload form
function setupUploadISOForm() {
    const form = document.getElementById('uploadIsoForm');
    if (!form.dataset.listenerAdded) {
        form.addEventListener('submit', uploadISO);
        form.dataset.listenerAdded = 'true';
    }
}

// Upload ISO
async function uploadISO(e) {
    e.preventDefault();
    
    const isoFile = document.getElementById('isoFile');
    const uploadBtn = document.getElementById('uploadBtn');
    const progressContainer = document.getElementById('progressContainer');
    const uploadProgress = document.getElementById('uploadProgress');
    
    if (!isoFile.files.length) {
        alert('Por favor selecciona un archivo');
        return;
    }
    
    const formData = new FormData();
    formData.append('file', isoFile.files[0]);
    
    uploadBtn.disabled = true;
    progressContainer.style.display = 'block';
    
    try {
        const xhr = new XMLHttpRequest();
        
        xhr.upload.addEventListener('progress', (e) => {
            if (e.lengthComputable) {
                const percentComplete = (e.loaded / e.total) * 100;
                uploadProgress.style.width = percentComplete + '%';
                uploadProgress.setAttribute('aria-valuenow', percentComplete);
                uploadProgress.textContent = Math.round(percentComplete) + '%';
            }
        });
        
        xhr.addEventListener('load', () => {
            if (xhr.status === 200) {
                const result = JSON.parse(xhr.responseText);
                alert(result.message || 'ISO subida correctamente');
                document.getElementById('uploadIsoForm').reset();
                progressContainer.style.display = 'none';
                uploadProgress.style.width = '0%';
                uploadProgress.textContent = '0%';
                loadISOs();
                loadISOsForSelect();
            } else {
                const result = JSON.parse(xhr.responseText);
                alert(result.error || 'Error al subir ISO');
                progressContainer.style.display = 'none';
            }
            uploadBtn.disabled = false;
        });
        
        xhr.addEventListener('error', () => {
            alert('Error al subir ISO');
            progressContainer.style.display = 'none';
            uploadBtn.disabled = false;
        });
        
        xhr.open('POST', `${API_BASE}/upload-iso`);
        xhr.send(formData);
    } catch (error) {
        console.error('Error:', error);
        alert(`Error: ${error.message}`);
        uploadBtn.disabled = false;
        progressContainer.style.display = 'none';
    }
}

// Delete ISO
async function deleteISO(name) {
    if (confirm(`¿Estás seguro de que quieres eliminar ${name}?`)) {
        try {
            const response = await fetch(`${API_BASE}/isos/${name}`, { method: 'DELETE' });
            const result = await response.json();
            
            if (response.ok) {
                alert('ISO eliminada correctamente');
                loadISOs();
                loadISOsForSelect();
            } else {
                alert(result.error || 'Error al eliminar ISO');
            }
        } catch (error) {
            console.error('Error:', error);
            alert(`Error: ${error.message}`);
        }
    }
}

// Mobile responsive - Toggle sidebar
function toggleSidebar() {
    const sidebar = document.querySelector('.sidebar');
    
    // Para móviles (max-width 768px), mostrar/ocultar el sidebar
    if (window.innerWidth <= 768) {
        sidebar.classList.toggle('show');
    }
}

// Cerrar sidebar cuando se selecciona una VM en móvil
const originalSelectVM = window.selectVM;
window.selectVM = function(vmName) {
    originalSelectVM(vmName);
    
    // Cerrar sidebar en móvil después de seleccionar
    if (window.innerWidth <= 768) {
        const sidebar = document.querySelector('.sidebar');
        sidebar.classList.remove('show');
    }
};

// Cerrar sidebar cuando se abre un modal
document.addEventListener('shown.bs.modal', function() {
    if (window.innerWidth <= 768) {
        const sidebar = document.querySelector('.sidebar');
        sidebar.classList.remove('show');
    }
});

// Download VM configuration as XML
async function downloadVMConfig(vmName) {
    try {
        const response = await fetch(`${API_BASE}/vms/${vmName}/config`);
        
        if (!response.ok) {
            alert(`Error: El servidor respondió con estado ${response.status}`);
            return;
        }
        
        const data = await response.json();
        
        if (data.error) {
            alert(`Error: ${data.error}`);
            return;
        }
        
        // Validar que tenemos el contenido XML
        if (!data.xml || data.xml === undefined || data.xml === 'undefined') {
            console.error('XML content is undefined or missing:', data);
            alert('Error: No se pudo obtener la configuración XML');
            return;
        }
        
        // Create a blob with the XML content
        const blob = new Blob([data.xml], { type: 'application/xml' });
        const url = window.URL.createObjectURL(blob);
        const link = document.createElement('a');
        link.href = url;
        link.download = `${vmName}-config.xml`;
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
        window.URL.revokeObjectURL(url);
    } catch (error) {
        console.error('Error downloading config:', error);
        alert(`Error al descargar configuración: ${error.message}`);
    }
}