function getCsrfToken() {
    return document.querySelector('meta[name="csrf-token"]')?.content || '';
}

const terminalInput = document.getElementById('terminalInput');
const terminalOutput = document.getElementById('terminalOutput');
const connectionStatus = document.getElementById('connectionStatus');

terminalInput.addEventListener('keydown', function(e) {
    if (e.key === 'Enter') {
        executeCommand();
    }
});

function executeCommand() {
    const command = terminalInput.value.trim();
    if (!command) return;

    appendTerminalLine(command, 'command');

    terminalInput.value = '';
    terminalInput.disabled = true;
    document.getElementById('executeBtn').disabled = true;

    updateStatus('executing', 'Executing...');

    fetch('/terminal/' + serverId + '/execute', {
        method: 'POST',
        headers: {
            'Accept': 'application/json',
            'Content-Type': 'application/x-www-form-urlencoded',
            'X-CSRF-Token': getCsrfToken(),
        },
        body: 'command=' + encodeURIComponent(command) + '&_csrf_token=' + encodeURIComponent(getCsrfToken()),
    })
    .then(r => r.json())
    .then(data => {
        terminalInput.disabled = false;
        document.getElementById('executeBtn').disabled = false;
        terminalInput.focus();

        if (data.success) {
            if (data.output) {
                appendTerminalLine(data.output, 'output');
            }
            if (data.stderr) {
                appendTerminalLine(data.stderr, 'error');
            }
            updateStatus('connected', 'Connected');
        } else {
            appendTerminalLine(data.message || 'Command failed', 'error');
            updateStatus('error', 'Error');
        }

        const terminalBody = document.getElementById('terminalOutput');
        terminalBody.scrollTop = terminalBody.scrollHeight;
    })
    .catch(err => {
        terminalInput.disabled = false;
        document.getElementById('executeBtn').disabled = false;
        appendTerminalLine('Connection error: ' + err.message, 'error');
        updateStatus('error', 'Error');
    });
}

function appendTerminalLine(text, type) {
    const line = document.createElement('div');
    line.className = 'terminal-line terminal-' + type;
    if (type === 'command') {
        line.innerHTML = '<span class="terminal-prompt-inline">$</span> ' + escapeHtml(text);
    } else {
        line.innerHTML = '<pre>' + escapeHtml(text) + '</pre>';
    }
    terminalOutput.appendChild(line);
    terminalOutput.scrollTop = terminalOutput.scrollHeight;
}

function runQuickCmd(cmd) {
    terminalInput.value = cmd;
    executeCommand();
}

function clearTerminal() {
    terminalOutput.innerHTML = '';
}

function clearHistory() {
    if (!confirm('Clear all command history for this server?')) return;

    fetch('/terminal/' + serverId + '/clear-history', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'X-CSRF-Token': getCsrfToken(),
        },
        body: '_csrf_token=' + encodeURIComponent(getCsrfToken()),
    })
    .then(r => r.json())
    .then(data => {
        showToast(data.success ? 'success' : 'error', data.message);
        if (data.success) location.reload();
    });
}

function updateStatus(status, text) {
    const dot = connectionStatus.querySelector('.status-dot');
    dot.className = 'status-dot ' + status;
    connectionStatus.lastChild.textContent = ' ' + text;
}

terminalInput.focus();