import { NextResponse } from 'next/server';
export async function GET() {
const html = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chat API Test</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
color: #333;
}
h1 {
color: #0070f3;
text-align: center;
margin-bottom: 30px;
}
#chat-container {
border: 1px solid #ccc;
border-radius: 8px;
padding: 20px;
height: 400px;
overflow-y: auto;
margin-bottom: 20px;
background-color: #f9f9f9;
display: flex;
flex-direction: column;
}
.message {
margin-bottom: 10px;
padding: 10px;
border-radius: 8px;
max-width: 80%;
word-wrap: break-word;
}
.user-message {
background-color: #e1f5fe;
align-self: flex-end;
margin-left: auto;
}
.assistant-message {
background-color: #f1f1f1;
align-self: flex-start;
}
.error-message {
background-color: #ffebee;
color: #c62828;
align-self: center;
width: 90%;
text-align: center;
}
#message-form {
display: flex;
gap: 10px;
}
#message-input {
flex-grow: 1;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
}
button {
padding: 10px 20px;
background-color: #0070f3;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.2s;
}
button:hover {
background-color: #0051a8;
}
button:disabled {
background-color: #ccc;
cursor: not-allowed;
}
#status {
margin-top: 10px;
color: #666;
height: 20px;
}
.loading {
display: inline-block;
width: 20px;
height: 20px;
border: 3px solid rgba(0, 112, 243, 0.3);
border-radius: 50%;
border-top-color: #0070f3;
animation: spin 1s ease-in-out infinite;
margin-left: 10px;
vertical-align: middle;
}
@keyframes spin {
to { transform: rotate(360deg); }
}
.debug-info {
margin-top: 20px;
padding: 10px;
background-color: #f5f5f5;
border-radius: 4px;
font-size: 14px;
color: #666;
display: none;
white-space: pre-wrap;
max-height: 300px;
overflow-y: auto;
}
.debug-toggle {
background: none;
border: none;
color: #0070f3;
cursor: pointer;
font-size: 14px;
padding: 0;
margin-top: 10px;
text-decoration: underline;
}
</style>
</head>
<body>
<h1>Chat API Test</h1>
<div id="chat-container"></div>
<form id="message-form">
<input type="text" id="message-input" placeholder="Type your message here..." required>
<button type="submit" id="send-button">Send</button>
</form>
<div id="status"></div>
<button class="debug-toggle" id="debug-toggle">Show Debug Info</button>
<div class="debug-info" id="debug-info"></div>
<script>
const chatContainer = document.getElementById('chat-container');
const messageForm = document.getElementById('message-form');
const messageInput = document.getElementById('message-input');
const statusDiv = document.getElementById('status');
const sendButton = document.getElementById('send-button');
const debugToggle = document.getElementById('debug-toggle');
const debugInfo = document.getElementById('debug-info');
let messages = [];
let isProcessing = false;
// Toggle debug info
debugToggle.addEventListener('click', () => {
if (debugInfo.style.display === 'block') {
debugInfo.style.display = 'none';
debugToggle.textContent = 'Show Debug Info';
} else {
debugInfo.style.display = 'block';
debugToggle.textContent = 'Hide Debug Info';
}
});
messageForm.addEventListener('submit', async (e) => {
e.preventDefault();
const message = messageInput.value.trim();
if (!message || isProcessing) return;
// Set UI to loading state
isProcessing = true;
sendButton.disabled = true;
messageInput.disabled = true;
// Add user message to UI
addMessageToUI('user', message);
messageInput.value = '';
// Add to messages array - ensure proper format with role and content
messages.push({ role: 'user', content: message });
try {
setStatus('Sending message...', true);
// Log what we're sending
const requestBody = {
messages: messages.slice(0, -1),
message: message
};
debugInfo.textContent = \`Sending request: \${JSON.stringify(requestBody, null, 2)}\`;
const response = await fetch('/api/chat', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify(requestBody),
});
if (!response.ok) {
const errorText = await response.text();
throw new Error(\`HTTP error! status: \${response.status}, message: \${errorText}\`);
}
setStatus('Receiving response...', true);
const reader = response.body.getReader();
const decoder = new TextDecoder();
let assistantMessage = '';
// Create an initial empty assistant message in the UI
addMessageToUI('assistant', '');
let debugText = '';
// Process the stream
while (true) {
const { done, value } = await reader.read();
if (done) break;
const chunk = decoder.decode(value, { stream: true });
debugText += chunk;
debugInfo.textContent = \`Sending request: \${JSON.stringify(requestBody, null, 2)}\n\nReceiving response:\n\${debugText}\`;
try {
// Split the chunk by any whitespace or newlines
const parts = chunk.trim().split(/\\s+|\\n+/);
for (const part of parts) {
// Handle text content tokens
if (part.startsWith('0:')) {
// Extract text content from format like 0:"text"
const match = part.match(/0:"([^"]*)"/);
if (match && match[1]) {
assistantMessage += match[1];
updateAssistantMessage(assistantMessage);
}
}
// Log other token types in debug info only
else if (part.startsWith('f:') || part.startsWith('e:') || part.startsWith('d:')) {
// Just log these in debug info
}
}
} catch (e) {
console.error('Error parsing chunk:', e);
debugInfo.textContent += \`\n\nError parsing chunk: \${e.message}\n\${chunk}\`;
}
}
if (assistantMessage) {
// Add final assistant message to messages array
messages.push({ role: 'assistant', content: assistantMessage });
setStatus('Response complete');
} else {
setStatus('No response received');
addMessageToUI('error', 'No response received from the server');
}
} catch (error) {
console.error('Error:', error);
setStatus(\`Error: \${error.message}\`);
addMessageToUI('error', \`Error: \${error.message}\`);
} finally {
// Reset UI state
isProcessing = false;
sendButton.disabled = false;
messageInput.disabled = false;
messageInput.focus();
}
});
function addMessageToUI(role, content) {
const messageDiv = document.createElement('div');
messageDiv.classList.add('message');
if (role === 'user') {
messageDiv.classList.add('user-message');
} else if (role === 'assistant') {
messageDiv.classList.add('assistant-message');
messageDiv.id = 'assistant-message-current';
} else if (role === 'error') {
messageDiv.classList.add('error-message');
}
messageDiv.textContent = content;
chatContainer.appendChild(messageDiv);
chatContainer.scrollTop = chatContainer.scrollHeight;
}
function updateAssistantMessage(content) {
let messageDiv = document.getElementById('assistant-message-current');
if (!messageDiv) {
messageDiv = document.createElement('div');
messageDiv.classList.add('message', 'assistant-message');
messageDiv.id = 'assistant-message-current';
chatContainer.appendChild(messageDiv);
}
messageDiv.textContent = content;
chatContainer.scrollTop = chatContainer.scrollHeight;
}
function setStatus(message, loading = false) {
statusDiv.innerHTML = message;
if (loading) {
const loadingSpinner = document.createElement('div');
loadingSpinner.classList.add('loading');
statusDiv.appendChild(loadingSpinner);
}
}
</script>
</body>
</html>
`;
return new NextResponse(html, {
headers: {
'Content-Type': 'text/html',
},
});
}
