import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

function timeAt(hour:number, minute:number) {
  // stocker une heure (Postgres TIME) via Date (UTC 1970-01-01)
  return new Date(Date.UTC(1970, 0, 1, hour, minute, 0));
}
function daysAgo(n:number) {
  const d = new Date();
  d.setUTCDate(d.getUTCDate() - n);
  d.setUTCHours(0,0,0,0);
  return d;
}

async function main() {
  const bankCodes = await prisma.bankCodes.findMany({ where: { type: 'SHIFT' }, select: { id: true } });
  if (!bankCodes.length) throw new Error('Need SHIFT bank codes');

  const employees = await prisma.employees.findMany({ select: { id: true } });

  for (const e of employees) {
    const tss = await prisma.timesheets.findMany({
      where: { employee_id: e.id },
      select: { id: true },
    });
    if (!tss.length) continue;

    // 10 shifts / employee
    for (let i = 0; i < 10; i++) {
      const ts = tss[i % tss.length];
      const bc = bankCodes[i % bankCodes.length];
      const date = daysAgo(7 + i); // la dernière quinzaine
      const startH = 8 + (i % 3); // 8..10
      const endH = startH + 7 + (i % 2); // 15..17

      await prisma.shifts.create({
        data: {
          timesheet_id: ts.id,
          bank_code_id: bc.id,
          description: `Shift ${i + 1} for emp ${e.id}`,
          date,
          start_time: timeAt(startH, 0),
          end_time: timeAt(endH, 0),
          is_approved: Math.random() < 0.5,
        },
      });
    }
  }

  const total = await prisma.shifts.count();
  console.log(`✓ Shifts: ${total} total rows`);
}

main().finally(() => prisma.$disconnect());