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| import { NextRequest, NextResponse } from 'next/server'; | |
| import { GoogleGenerativeAI } from '@google/generative-ai'; | |
| export async function POST(request: NextRequest) { | |
| try { | |
| const { question, answer, role, difficulty } = await request.json(); | |
| const headerApiKey = request.headers.get('x-gemini-api-key'); | |
| const apiKey = headerApiKey || process.env.GEMINI_API_KEY; | |
| if (!apiKey) { | |
| return NextResponse.json( | |
| { error: 'GEMINI_API_KEY is not configured. Please add it in Settings or .env.local file.' }, | |
| { status: 500 } | |
| ); | |
| } | |
| const genAI = new GoogleGenerativeAI(apiKey); | |
| const model = genAI.getGenerativeModel({ model: 'gemini-2.0-flash' }); | |
| const prompt = `You are an expert interview evaluator for a ${role} position (${difficulty} level). | |
| QUESTION: "${question}" | |
| CANDIDATE'S ANSWER: "${answer}" | |
| Evaluate the candidate's answer thoroughly. Return ONLY a valid JSON object (no markdown, no code blocks) with these exact fields: | |
| { | |
| "score": <overall score 0-10>, | |
| "relevance": <relevance to question 0-10>, | |
| "clarity": <clarity of explanation 0-10>, | |
| "technicalAccuracy": <technical correctness 0-10>, | |
| "confidence": <apparent confidence level 0-10>, | |
| "strengths": [<array of 2-3 specific strengths>], | |
| "weaknesses": [<array of 2-3 specific areas for improvement>], | |
| "suggestions": [<array of 2-3 actionable suggestions>], | |
| "sampleAnswer": "<a comprehensive ideal answer in 3-4 sentences>" | |
| } | |
| Be fair but rigorous. Provide constructive, actionable feedback. The sample answer should demonstrate what an excellent response looks like.`; | |
| const result = await model.generateContent(prompt); | |
| const responseText = result.response.text(); | |
| // Parse JSON from the response | |
| const jsonMatch = responseText.match(/\{[\s\S]*\}/); | |
| if (!jsonMatch) { | |
| throw new Error('Failed to parse evaluation from AI response'); | |
| } | |
| const evaluation = JSON.parse(jsonMatch[0]); | |
| return NextResponse.json({ evaluation }); | |
| } catch (error) { | |
| console.error('Error evaluating answer:', error); | |
| return NextResponse.json( | |
| { error: 'Failed to evaluate answer. Please try again.' }, | |
| { status: 500 } | |
| ); | |
| } | |
| } | |