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import { serve } from "https://deno.land/[email protected]/http/server.ts";
import { Mistral } from "npm:@mistralai/mistralai";
const corsHeaders = {
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
};
serve(async (req) => {
if (req.method === 'OPTIONS') {
return new Response(null, { headers: corsHeaders });
}
try {
const { currentWord, currentSentence } = await req.json();
console.log('Generating word for:', { currentWord, currentSentence });
// currentSentence is already a string from the client
const existingSentence = currentSentence || '';
const client = new Mistral({
apiKey: Deno.env.get('MISTRAL_API_KEY'),
});
// Add retry logic with exponential backoff
const maxRetries = 3;
let retryCount = 0;
let lastError = null;
while (retryCount < maxRetries) {
try {
const response = await client.chat.complete({
model: "mistral-large-latest",
messages: [
{
role: "system",
content: `You are helping in a word game. The secret word is "${currentWord}".
Your task is to find a sentence to describe this word without using it directly.
Answer with a complete, grammatically correct sentence that starts with "${existingSentence}".
Do not add quotes or backticks. Just answer with the sentence.`
}
],
maxTokens: 10,
temperature: 0.7
});
const aiResponse = response.choices[0].message.content.trim();
console.log('AI full response:', aiResponse);
// Extract the new word by comparing with the existing sentence
const newWord = aiResponse
.slice(existingSentence.length)
.trim()
.split(' ')[0]
.replace(/[.,!?]$/, ''); // Remove any punctuation at the end
console.log('Extracted new word:', newWord);
return new Response(
JSON.stringify({ word: newWord }),
{ headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
);
} catch (error) {
console.error(`Attempt ${retryCount + 1} failed:`, error);
lastError = error;
// If it's a rate limit error, wait before retrying
if (error.message?.includes('rate limit') || error.status === 429) {
const waitTime = Math.pow(2, retryCount) * 1000; // Exponential backoff: 1s, 2s, 4s
console.log(`Rate limit hit, waiting ${waitTime}ms before retry`);
await new Promise(resolve => setTimeout(resolve, waitTime));
retryCount++;
continue;
}
// If it's not a rate limit error, throw immediately
throw error;
}
}
// If we've exhausted all retries
throw new Error(`Failed after ${maxRetries} attempts. Last error: ${lastError?.message}`);
} catch (error) {
console.error('Error generating word:', error);
// Provide a more user-friendly error message
const errorMessage = error.message?.includes('rate limit')
? "The AI service is currently busy. Please try again in a few moments."
: "Sorry, there was an error generating the word. Please try again.";
return new Response(
JSON.stringify({
error: errorMessage,
details: error.message
}),
{
status: error.message?.includes('rate limit') ? 429 : 500,
headers: { ...corsHeaders, 'Content-Type': 'application/json' }
}
);
}
}); |