// ═══════════════════════════════════════════════════════════════════════════
// POLL API - Create, Vote, End polls
// ═══════════════════════════════════════════════════════════════════════════

import { NextRequest, NextResponse } from 'next/server';
import { sessionManager } from '@/lib/session-manager';

export const runtime = 'nodejs';
export const dynamic = 'force-dynamic';

export async function POST(request: NextRequest) {
  try {
    const body = await request.json();
    const { action, sessionId, question, options, correctAnswer, duration, pollId, option, studentId } = body;

    if (!sessionId) {
      return NextResponse.json({ 
        success: false, 
        error: 'Missing sessionId' 
      }, { status: 400 });
    }

    // CREATE POLL
    if (action === 'create') {
      if (!question || !options || !Array.isArray(options)) {
        return NextResponse.json({ 
          success: false, 
          error: 'Missing required fields for poll creation' 
        }, { status: 400 });
      }

      const poll = await sessionManager.createPoll(
        sessionId,
        question,
        options,
        correctAnswer,
        duration || 60
      );

      return NextResponse.json({
        success: true,
        data: poll
      });
    }

    // VOTE POLL
    if (action === 'vote') {
      if (!pollId || !option || !studentId) {
        return NextResponse.json({ 
          success: false, 
          error: 'Missing required fields for voting' 
        }, { status: 400 });
      }

      const poll = await sessionManager.votePoll(sessionId, pollId, option, studentId);

      if (!poll) {
        return NextResponse.json({ 
          success: false, 
          error: 'Poll not found or inactive' 
        }, { status: 404 });
      }

      return NextResponse.json({
        success: true,
        data: poll
      });
    }

    // END POLL
    if (action === 'end') {
      if (!pollId) {
        return NextResponse.json({ 
          success: false, 
          error: 'Missing pollId' 
        }, { status: 400 });
      }

      await sessionManager.endPoll(sessionId, pollId);

      return NextResponse.json({
        success: true,
        message: 'Poll ended'
      });
    }

    return NextResponse.json({ 
      success: false, 
      error: 'Invalid action' 
    }, { status: 400 });

  } catch (error) {
    console.error('Poll API error:', error);
    return NextResponse.json({ 
      success: false, 
      error: 'Internal server error' 
    }, { status: 500 });
  }
}

export async function GET(request: NextRequest) {
  try {
    const { searchParams } = new URL(request.url);
    const sessionId = searchParams.get('sessionId');

    if (!sessionId) {
      return NextResponse.json({ 
        success: false, 
        error: 'Missing sessionId' 
      }, { status: 400 });
    }

    const activePoll = sessionManager.getActivePoll(sessionId);

    return NextResponse.json({
      success: true,
      data: activePoll
    });

  } catch (error) {
    console.error('Poll API error:', error);
    return NextResponse.json({ 
      success: false, 
      error: 'Internal server error' 
    }, { status: 500 });
  }
}