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| import { NextRequest, NextResponse } from 'next/server'; | |
| import { GoogleGenerativeAI } from '@google/generative-ai'; | |
| export async function POST(request: NextRequest) { | |
| try { | |
| const { role, difficulty, evaluations, questions, answers } = 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 qaDetails = questions.map((q: { text: string }, i: number) => { | |
| const answer = answers[i]?.text || 'No answer provided'; | |
| const evaluation = evaluations[i]; | |
| return `Q${i + 1}: ${q.text}\nAnswer: ${answer}\nScore: ${evaluation?.score || 0}/10`; | |
| }).join('\n\n'); | |
| const avgScore = evaluations.length > 0 | |
| ? evaluations.reduce((sum: number, e: { score: number }) => sum + e.score, 0) / evaluations.length | |
| : 0; | |
| const prompt = `You are a senior interview coach reviewing a complete mock interview session. | |
| ROLE: ${role} | |
| DIFFICULTY: ${difficulty} | |
| AVERAGE SCORE: ${avgScore.toFixed(1)}/10 | |
| INTERVIEW DETAILS: | |
| ${qaDetails} | |
| Generate a comprehensive session summary. Return ONLY valid JSON (no markdown, no code blocks): | |
| { | |
| "totalScore": <total score out of ${evaluations.length * 10}>, | |
| "averageScore": <average score to 1 decimal>, | |
| "strengths": [<array of 3-4 key strengths demonstrated across all answers>], | |
| "weaknesses": [<array of 3-4 main areas needing improvement>], | |
| "recommendations": [<array of 4-5 specific, actionable study/practice recommendations>], | |
| "categoryScores": [<array of {"category": "topic", "score": average_score_for_topic}>], | |
| "overallFeedback": "<a motivating 3-4 sentence overall assessment with encouragement and next steps>" | |
| } | |
| Be constructive, specific, and encouraging. Focus on actionable improvement paths.`; | |
| const result = await model.generateContent(prompt); | |
| const responseText = result.response.text(); | |
| const jsonMatch = responseText.match(/\{[\s\S]*\}/); | |
| if (!jsonMatch) { | |
| throw new Error('Failed to parse summary from AI response'); | |
| } | |
| const summary = JSON.parse(jsonMatch[0]); | |
| summary.totalQuestions = questions.length; | |
| summary.answeredQuestions = answers.length; | |
| return NextResponse.json({ summary }); | |
| } catch (error) { | |
| console.error('Error generating summary:', error); | |
| return NextResponse.json( | |
| { error: 'Failed to generate session summary.' }, | |
| { status: 500 } | |
| ); | |
| } | |
| } | |