import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import prisma from '@/lib/prisma';

// GET - Fetch job requisitions
export async function GET(request: Request) {
  try {
    const session = await getServerSession();
    if (!session) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const { searchParams } = new URL(request.url);
    const status = searchParams.get('status');

    const where: any = {};
    if (status && status !== 'All') where.status = status;

    const requisitions = await prisma.recruitmentRequisition.findMany({
      where,
      orderBy: { createdAt: 'desc' }
    });

    return NextResponse.json(requisitions);
  } catch (error) {
    console.error('Error fetching requisitions:', error);
    return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
  }
}

// POST - Create job requisition
export async function POST(request: Request) {
  try {
    const session = await getServerSession();
    if (!session || ((session.user as any)?.role !== 'admin' && (session.user as any)?.role !== 'hr')) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const body = await request.json();
    const { title, department, position, requirements, numberOfPositions, requiredByDate } = body;

    const requisition = await prisma.recruitmentRequisition.create({
      data: {
        position,
        dept: department,
        employmentType: 'Permanent',
        vacancies: numberOfPositions || 1,
        justification: title || requirements || '',
        requiredByDate: requiredByDate ? new Date(requiredByDate) : new Date(),
        status: 'Open',
        requestedBy: (session.user as any)?.name || (session.user as any)?.email || 'System',
        jobDescription: requirements || ''
      }
    });

    return NextResponse.json(requisition, { status: 201 });
  } catch (error) {
    console.error('Error creating requisition:', error);
    return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
  }
}