/**
 * GET    /api/calendars/[id] - Kalenderdetails (Owner oder Member).
 * PATCH  /api/calendars/[id] - bearbeiten (nur besitzender Admin).
 */
import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/db/client';
import { requireCalendarContext } from '@/lib/api/context';
import { updateCalendarSchema } from '@/lib/validation';
import { canManageCalendar } from '@/lib/permissions/permissions';
import { errorResponse, forbiddenResponse } from '@/lib/api/responses';

interface RouteParams {
  params: Promise<{ id: string }>;
}

export async function GET(
  _request: NextRequest,
  { params }: RouteParams,
): Promise<NextResponse> {
  try {
    const { id } = await params;
    const context = await requireCalendarContext(id);

    return NextResponse.json({ calendar: context.calendar });
  } catch (error) {
    return errorResponse(error);
  }
}

export async function PATCH(
  request: NextRequest,
  { params }: RouteParams,
): Promise<NextResponse> {
  try {
    const { id } = await params;
    const context = await requireCalendarContext(id);

    if (!canManageCalendar(context.user, context.calendar)) {
      return forbiddenResponse();
    }

    const body = updateCalendarSchema.parse(await request.json());

    const calendar = await prisma.calendar.update({
      where: { id },
      data: {
        ...(body.title !== undefined ? { title: body.title } : {}),
        ...(body.description !== undefined
          ? { description: body.description }
          : {}),
        ...(body.timezone !== undefined ? { timezone: body.timezone } : {}),
        ...(body.isActive !== undefined ? { isActive: body.isActive } : {}),
        ...(body.maxReservationMinutes !== undefined
          ? { maxReservationMinutes: body.maxReservationMinutes }
          : {}),
        ...(body.showTitleToMembers !== undefined
          ? { showTitleToMembers: body.showTitleToMembers }
          : {}),
        ...(body.showNotesToMembers !== undefined
          ? { showNotesToMembers: body.showNotesToMembers }
          : {}),
      },
      select: {
        id: true,
        title: true,
        description: true,
        timezone: true,
        isActive: true,
        maxReservationMinutes: true,
        showTitleToMembers: true,
        showNotesToMembers: true,
      },
    });

    return NextResponse.json({ calendar });
  } catch (error) {
    return errorResponse(error);
  }
}