import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/types/prisma";
import { auth } from "@/lib/auth-session/auth";
import { Prisma } from "@prisma/client";

export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const session = await auth.api.getSession({
      headers: await import("next/headers").then((mod) => mod.headers()),
    });

    if (!session?.user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }

    // Only admin can edit appointments
    if (session.user.role !== "admin") {
      return NextResponse.json(
        { error: "Forbidden: Admin access required" },
        { status: 403 }
      );
    }

    const { id } = await params;
    const body = await request.json();
    const { date, timeSlot, status, notes } = body;

    // Validate that the appointment exists
    const existingAppointment = await prisma.appointment.findUnique({
      where: { id },
    });

    if (!existingAppointment) {
      return NextResponse.json(
        { error: "Appointment not found" },
        { status: 404 }
      );
    }

    // Build update data object
    const updateData: Prisma.AppointmentUpdateInput = {};

    if (date !== undefined) updateData.date = new Date(date);
    if (timeSlot !== undefined) updateData.timeSlot = timeSlot;
    if (status !== undefined) updateData.status = status;
    if (notes !== undefined) updateData.notes = notes;

    // Update the appointment
    const updatedAppointment = await prisma.appointment.update({
      where: { id },
      data: updateData,
      include: {
        patient: true,
        dentist: true,
        service: true,
        payment: true,
      },
    });

    return NextResponse.json({
      success: true,
      appointment: updatedAppointment,
      message: "Appointment updated successfully",
    });
  } catch (error) {
    console.error("Error updating appointment:", error);
    return NextResponse.json(
      { error: "Failed to update appointment" },
      { status: 500 }
    );
  }
}